SJW


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:ConsolidatedEntities

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
us-gaap:PlanName

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:InterestExpenseDebt

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:OperatingIncomeLoss
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:RegulatedOperatingRevenue
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:Revenues

us-gaap:Assets
us-gaap:ConsolidatedEntities
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:Cash

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:Land

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:BusinessAcquisition

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssets

us-gaap:AccountsPayableCurrent
us-gaap:ConsolidatedEntities

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:LongTermDebtCurrent
us-gaap:ConsolidatedEntities

us-gaap:OtherLiabilitiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:LongTermDebt
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:ConsolidatedEntities

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanType

us-gaap:OtherLiabilitiesNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue
us-gaap:ConsolidatedEntities

us-gaap:AdditionalPaidInCapitalCommonStock
us-gaap:ConsolidatedEntities

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquireRealEstate

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:Dividends
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:Range, us-gaap:LongtermDebtType

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

sjw:AlternativeRevenueProgramsNet
dei:LegalEntity
sjw:AuthorizedRegulatoryBaseChargePerResidentialAccount
dei:LegalEntity
sjw:AuthorizedRegulatorySurchargePerThousandGallons

sjw:BalancingandMemorandumAccountIncreaseDecrease

sjw:BalancingandMemorandumAccountRefundsCollections

sjw:BalancingandMemorandumCostRecoveryAccountIncreaseDecrease
us-gaap:RegulatoryAsset

sjw:BalancingandMemorandumCostRecoveryAccountRefundsCollections
us-gaap:RegulatoryAsset

sjw:BalancingandMemorandumRevenueAccountIncreaseDecrease
us-gaap:RegulatoryAsset

sjw:BalancingandMemorandumRevenueAccountRefundsCollections
us-gaap:RegulatoryAsset
us-gaap:BusinessAcquisition
sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets
us-gaap:BusinessAcquisition
sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentAssets
us-gaap:BusinessAcquisition
sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilities
us-gaap:BusinessAcquisition
sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxes
us-gaap:BusinessAcquisition
sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities
us-gaap:BusinessAcquisition
sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncurrentLiabilities
us-gaap:BusinessAcquisition
sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRegulatoryAssetsandDeferredChargesNet
us-gaap:TitleOfIndividual
sjw:DefinedBenefitPlanRateOfCompensationIncrease

sjw:GroundwaterExtractionCharges

sjw:IncreaseDecreaseInUpFrontServiceConcessionPayment

sjw:IncreaseDecreaseToRegulatoryAssetRelatedToBalancingAndMemorandumAccounts

sjw:IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower
us-gaap:Range
sjw:MarketPriceStock

sjw:NoncashChangeInAccruedPayables

sjw:PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType
sjw:PrincipalDebtSold
us-gaap:ConsolidatedEntities
sjw:RealEstateSellingExpenses

sjw:ReceiptsOfAdvancesAndContributionsInAidOfConstruction

sjw:RegulatoryBalancingAndMemorandumAccountsNet

sjw:RegulatoryBalancingandMemorandumAccountsRevenueNet

sjw:RegulatoryMechanismsOtherNet
dei:LegalEntity, us-gaap:SubsequentEventType
sjw:RegulatoryRateFilingsApprovedRevenueIncrease
dei:LegalEntity
sjw:RegulatoryRateFilingsRequestedIncreaseInRevenues
dei:LegalEntity, us-gaap:SubsequentEventType
dei:LegalEntity
sjw:RegulatoryRateFilingsRequestedIncreaseInRevenuesCompletedInfrastructureInvestmentsNotCurrentlyInApprovedRatesAndSurcharges
dei:LegalEntity, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:StatementScenario
sjw:RegulatoryRateFilingsRequestedProjectReplacementValue
dei:LegalEntity
sjw:RegulatoryRateFilingsRequestedReductionInWaterBillsForIncomeEligibleCustomers
dei:LegalEntity
sjw:RequestedWICASurchargeIncreaseIncreaseInRevenues

sjw:StockIssuanceCostsIncurredButNotYetPaid

sjw:UtilityPropertyInstalledByDeveloper

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CostOfPurchasedWater

us-gaap:DefinedBenefitPlanActuarialGainLoss

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:DefinedBenefitPlanServiceCost
us-gaap:IncomeStatementLocation
us-gaap:Depreciation

us-gaap:GainLossOnSaleOfProperties
us-gaap:ConsolidatedEntities
us-gaap:BusinessAcquisition
us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:IncreaseDecreaseInAccruedTaxesPayable

us-gaap:IncreaseDecreaseInPensionAndPostretirementObligations

us-gaap:IncreaseDecreaseInReceivables

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent

us-gaap:OperatingLeaseLeaseIncome

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:PaymentsForProceedsFromRemovalCosts

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsToAcquireWaterSystems

us-gaap:ProceedsFromIssuanceOfCommonStock
us-gaap:PlanName
us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleOfPropertyHeldForSale
us-gaap:ConsolidatedEntities
us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
us-gaap:PublicUtilitiesApprovedRateIncreaseDecreaseAmount
dei:LegalEntity
us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount
dei:LegalEntity, us-gaap:SubsequentEventType

us-gaap:RepaymentsOfAdvancesForConstruction

us-gaap:RepaymentsOfLinesOfCredit
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:SubsidiarySaleOfStock
us-gaap:SaleOfStockConsiderationReceivedOnTransaction
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:PlanName
us-gaap:StockOptionPlanExpense

us-gaap:UnrealizedGainLossOnInvestments
us-gaap:StatementEquityComponents

us-gaap:UtilitiesOperatingExpense
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:UtilitiesOperatingExpenseMaintenance

us-gaap:UtilitiesOperatingExpenseOther

us-gaap:UtilitiesOperatingExpensePurchasedPower

us-gaap:UtilitiesOperatingExpenseTaxes

us-gaap:WaterProductionCosts

sjw:Accruedgroundwaterextractionchargespurchasedwaterandpower

sjw:AdvancesForConstructionEstimatedRefundsAfterYearFive

sjw:AdvancesForConstructionEstimatedRefundsNextTwelveMonths

sjw:AdvancesForConstructionEstimatedRefundsYearFive

sjw:AdvancesForConstructionEstimatedRefundsYearFour

sjw:AdvancesForConstructionEstimatedRefundsYearThree

sjw:AdvancesForConstructionEstimatedRefundsYearTwo
dei:LegalEntity
sjw:AuthorizedTemporarySurchargePercentage
dei:LegalEntity
sjw:AuthorizedWICASurchargePercentage

sjw:BalancingAndMemorandumAccountNet

sjw:BalancingandMemorandumCostRecoveryAccountNet
us-gaap:RegulatoryAsset

sjw:BalancingandMemorandumRevenueAccountNet
us-gaap:RegulatoryAsset
us-gaap:BusinessAcquisition
sjw:BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRegulatoryAssesandDeferredChargesnet

sjw:ContractWithCustomerRefundLiabilityFairValueDisclosure

sjw:CustomerAdvancesforConstructionNonRefundable

sjw:CustomerAdvancesforConstructionRefundedonServiceConnections

sjw:DeferredTaxAssetsAdvancesAndContributions

sjw:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostretirementBenefits

sjw:DeferredTaxLiabilitiesChangeinAccountingPolicy

sjw:DeferredTaxLiabilitiesDeferredGainAndOtherPropertyRelated

sjw:DeferredTaxLiabilitiesPensionAndPostretirementBenefits

sjw:DeferredTaxLiabilitiesRegulatoryAssetDebtPremium

sjw:DeferredTaxLiabilityRegulatoryAssetIncomeTaxTemporaryDifferences

sjw:DefinedBenefitPlanEstimatedTotalEmployerContributionsForCurrentFiscalYear
us-gaap:ConsolidatedEntities
sjw:IncomeTaxPayableCurrent
dei:LegalEntity
sjw:IncreaseInNumberOfServiceConnections
us-gaap:ConsolidatedEntities
sjw:IntercompanyNotesPayableCurrent
us-gaap:ConsolidatedEntities
sjw:IntercompanyNotesReceivableCurrent
us-gaap:ConsolidatedEntities
sjw:IntercompanyReceivablesCurrent
us-gaap:ConsolidatedEntities
sjw:InvestmentsInSubsidiaries
sjw:MajorSupplier
sjw:LongTermPurchaseCommitmentMinimumVolumeRequiredNextTwelveMonths
dei:LegalEntity
sjw:NumberOfCountyResidencesServed
dei:LegalEntity
sjw:PublicUtilitiesNumberOfPeopleServed
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
sjw:PublicUtilitiesNumberofCommunitiesServed

sjw:PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment
us-gaap:Range
sjw:PublicUtilitiesServiceArea
us-gaap:ConsolidatedEntities, us-gaap:StatementGeographical
sjw:PublicUtilitiesServiceConnections
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
sjw:RatioOfIndebtednessToCapital
us-gaap:ConsolidatedEntities, us-gaap:GuaranteeObligationsByNature, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType
us-gaap:RegulatoryAsset
sjw:RegulatoryAssetsFundedStatusOfObligation

sjw:RegulatoryBalancingandMemorandumAccountsNetUnderCollected
us-gaap:RegulatoryAsset
sjw:RegulatoryLiabilitiesAccruedBenefitCost
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsAverageCostOfDebtRateCurrent
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsAverageCostOfDebtRateRequested
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsBalancingAndMemorandumAccountRequestedRecoveryRefund
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsCapitalStructureDebtPercentageCurrent
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsCapitalStructureDebtPercentageRequested
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsCapitalStructureEquityPercentageCurrent
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsCapitalStructureEquityPercentageRequested
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsProposedRateIncreasePercentofAuthorizedRevenueYearTwo
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsRateOfReturnCurrent
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsRateOfReturnRequested
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsRequestedAuthorizationForCapitalBudgetAmount
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsRequestedRateIncreasePercentOfAuthorizedRevenueYearThree
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType
dei:LegalEntity
sjw:RegulatoryRateFilingsRequestedRateIncreaseYearOne
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsRequestedRateIncreaseYearThree
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsRequestedRateIncreaseYearTwo
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType
dei:LegalEntity
sjw:RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:SubsequentEventType
sjw:RegulatoryRateFilingsReturnOfEquityRateApproved
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsReturnOfEquityRateCurrent
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
sjw:RegulatoryRateFilingsReturnOfEquityRateRequested
dei:LegalEntity
sjw:RequestedWICASurchargeIncreaseDecreasePercentage
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding
dei:LegalEntity
sjw:RequestedWICASurchargePercentage
dei:LegalEntity, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:Range
sjw:RequestedWISCSurchargeIncreaseDecreasePercentage

sjw:RestrictedNetAssetsSubsidiaries

sjw:RestrictedNetAssetsSubsidiariesPercentOfConsolidatedAssets
us-gaap:AwardType, us-gaap:PlanName
sjw:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
sjw:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedWeightedAverageGrantDateFairValue

sjw:UnrecognizedTaxBenefitsGross

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligationLegallyRestrictedAssetsFairValue
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities

us-gaap:CapitalizationLongtermDebtAndEquity
us-gaap:ConsolidatedEntities

us-gaap:CashSurrenderValueOfLifeInsurance

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContributionsInAidOfConstruction

us-gaap:DebtInstrumentUnamortizedPremium

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsStateTaxes

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:Range
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:PlanName

us-gaap:FiniteLivedCustomerRelationshipsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IncomeTaxesReceivable

us-gaap:InterestPayableCurrent
us-gaap:ConsolidatedEntities

us-gaap:InvestmentBuildingAndBuildingImprovements

us-gaap:Investments

us-gaap:LifeInsuranceCorporateOrBankOwnedAmount
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility
us-gaap:LineOfCredit
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd

us-gaap:LinesOfCreditCurrent
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:NetRegulatoryAssets

us-gaap:NontradeReceivablesCurrent

us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherAssetsMiscellaneousNoncurrent
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:PrepaidExpenseCurrent
us-gaap:MajorPropertyClass
us-gaap:PropertySubjectToOrAvailableForOperatingLeaseNet

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentEquipment

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentLand

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution
sjw:MajorSupplier
us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation

us-gaap:RealEstateInvestmentPropertyAtCost

us-gaap:RealEstateInvestmentPropertyNet

us-gaap:ReceivablesLongTermContractsOrPrograms

us-gaap:RegulatoryAssets
us-gaap:RegulatoryAsset

us-gaap:RegulatoryAssetsCurrent

us-gaap:RegulatoryAssetsNoncurrent

us-gaap:RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:SaleOfStockPricePerShare
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:IncomeTaxAuthority
us-gaap:TaxCreditCarryforwardAmount

us-gaap:UnamortizedDebtIssuanceExpense

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Finite Lived Intangible Assets Net
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Other Assets Current
NonCurrent Assets
Finite Lived Intangible Assets Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Liabilities Current
Current Liabilities
Accrued Income Taxes Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Common Stock Dividends Per Share Cash Paid
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation
NetCashProvidedByUsedInFinancingActivities
Proceeds From Payments For Other Financing Activities
Shares
Common Stock Shares Issued
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:CommonStockValue ██▇▇▇▆▆▆▆▆▆▁▁▁▁▁▁▁0.030.030.0290.0290.0290.0280.0280.0280.0280.0280.0280.0210.0210.0210.0210.0210.0210.021
us-gaap:CommonStockSharesIssued NANA28.556605NA28.51670528.49784128.45650828.4564928.44213928.40431628.40431620.63117120.59448620.58513620.52085620.52085620.50649420.498733
us-gaap:CommonStockSharesOutstanding NANA28.556605NA28.51670528.49784128.45650828.4564928.44213928.40431628.40431620.63117120.59448620.58513620.52085620.52085620.50649420.498733
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁29.92419128.990203NA28.70334328.68320828.674221NA28.54992828.52602228.507738NA20.7320420.73212720.701031NA20.69709720.67377520.655239
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁29.79949928.862882NA28.53390728.5079428.489357NA28.45181128.44022128.423214NA20.62665420.59201420.561329NA20.51617220.50435720.485968
us-gaap:EarningsPerShareBasic ▆▃▅█▆▃▁▄▅▃▅▇▆▃▇██▃0.70.090.470.910.690.08-0.20.330.480.210.380.770.630.060.840.950.910.18
us-gaap:EarningsPerShareDiluted ▆▃▅█▆▃▁▄▅▃▅▇▆▃▇██▃0.690.090.460.910.690.08-0.190.330.470.210.380.760.620.060.840.940.90.18
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 TTM Greenblatt ROC _ _▆▂▅█▇▃▁▃▄▂▃▅▄▁▃▇▆▂32.63913.07924.2941.88336.0715.4276.01617.08421.97112.40817.48225.82822.7997.33118.21438.24530.78710.833
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▅██▆▆▁▅▆▄▅▄▃▂▃▆▃▂▃0.7911.281.2351.0581.0090.2510.850.9520.7180.8860.7340.5040.3920.4871.010.5890.4580.586
us-gaap:ComprehensiveIncomeNetOfTax ▇▃▅█▇▃▁▄▅▃▄▆▅▂▆▇▆▃20.8822.65412.14226.16919.7312.282-5.369.47813.5385.8738.82315.78812.8711.28517.73219.6218.7443.787
us-gaap:GeneralAndAdministrativeExpense ▆▆▆▅▄▆█▃▂▁▂▂▁▁▃▂▂▂21.32620.89320.82419.52917.77221.26225.8914.71213.40812.29112.65512.75211.95811.56815.51713.47713.41212.605
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▆▂▄█▆▃▁▄▅▃▄▆▅▂▇██▃24.0811.7212.43830.67123.9312.855-5.83412.04317.9547.91811.29719.89116.9390.70525.64333.06332.5485.239
us-gaap:IncomeTaxExpenseBenefit ▃▁▁▄▃▂▁▃▃▂▃▃▃▁▅█▇▂3.306-0.896-0.8464.5784.210.438-0.3482.5654.1922.0452.4744.1034.068-0.588.33813.52311.9641.568
us-gaap:IncomeTaxesPaidNet ▁▁▂▄▁▁▁▃▄▁▄▃▁▁█▆▁▁0.8620.1583.3567.0190.055-0.050.1626.7059.5810.08.6054.7250.3350.08519.514.3150.2370.0
us-gaap:InterestExpense ▇▇█▇▇▇▇▂▂▁▁▁▁▁▁▁▁▁13.68113.43914.61713.17413.1813.28412.7036.5886.7145.7916.1196.0776.0846.0525.5755.5415.7566.057
us-gaap:InterestExpenseDebt ▇▇█▇▇▇▇▂▂▁▂▁▁▁▁▁▁▁13.68113.43914.61713.17413.1813.28412.7036.5886.7145.7916.1196.0776.0846.0525.4645.4875.6965.963
us-gaap:InterestPaidNet █▃▇▃█▂▄▁▁▁▂19.759.51619.54610.37920.6579.37312.3176.4897.0286.3047.333NANANANANANANA
us-gaap:NetIncomeLoss ▇▃▅█▇▃▁▄▅▄▄▆▅▃▆▇▆▃20.7752.61613.28426.09319.7212.417-5.4869.47813.5385.8738.82315.78812.8711.28517.30519.5418.6883.671
us-gaap:OperatingIncomeLoss ▆▂▅█▇▃▁▃▄▂▃▅▄▁▃▇▆▂32.63913.07924.2941.88336.0715.4276.01617.08421.97112.40817.48225.82822.7997.33118.21438.24530.78710.833
us-gaap:OtherComprehensiveIncomeLossNetOfTax █▁0.1070.038NA0.0760.01-0.135NANA0.0NANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▅▅█▃▃▂▃▁▂▁▂▂▂▂▁▁▂▁1.7841.7542.9711.131.0480.7570.9010.3030.5170.390.5140.5380.6790.6760.4840.3410.5960.445
us-gaap:ProfitLoss NANA13.28426.09319.7212.417-5.4869.47813.7625.8738.82315.78812.8711.28517.30519.5420.5843.671
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarningsNANANA26.09319.7212.417NA9.47813.5385.873NA15.78812.8711.285NANANANA
us-gaap:RegulatedOperatingRevenue ▇▄▆█▇▄▅▄▃▂▃▅▃▁▃▅▃▁152.241114.785135.7165.863147.209115.754125.838113.997102.96577.68298.718124.85399.08675.04293.529124.578102.07369.045
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▇▄▆█▆▄▆▅▄▂▃▅▃▂▃▅▃▁147.204112.238134.926167.045142.163105.136133.717130.777104.29978.92694.983120.00798.44375.86991.631125.72295.85768.567
us-gaap:Revenues ▇▄▆█▇▄▅▄▃▂▃▅▃▁▃▅▃▁152.241114.785135.7165.863147.209115.754125.838113.997102.96577.68298.718124.85399.08675.04293.529124.578102.07369.045
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:Assets ███▇▇▇▇▃▃▃▃▁▁▁▁▁▁▁3409.5223332.1423311.4653259.7143209.9773174.2983132.472022.3822003.651958.8071956.3891536.8681500.1211463.8741458.0011511.571471.1861435.777
us-gaap:LiabilitiesAndStockholdersEquity ███▇▇▇▇▃▃▃▃▁▁▁▁▁▁▁3409.5223332.1423311.4653259.7143209.9773174.2983132.472022.3822003.651958.8071956.3891536.8681500.1211463.8741458.0011511.571471.1861435.777
us-gaap:StockholdersEquity ██▇▇▇▇▇▇▇▇▇▂▂▁▂▁▁▁989.679978.296917.16913.061895.131883.541889.984896.664893.995888.293889.312474.957465.294457.83463.209452.471436.11421.4
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AssetsCurrent ▂▂▂▂▂▂▂████▁▁▁▁▁▁▁146.858123.467127.331154.902145.543128.818122.046507.814503.919488.456502.72280.36773.17361.0666.85887.12172.89273.736
us-gaap:Cash ▇▃▁▆▆█▃▃▂▂▂25.44211.4065.26920.21123.31728.27312.94412.7029.8497.6638.722NANANA7.799NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▃▁25.44211.4065.269NA23.31728.27312.944424.702421.849419.663420.72213.3278.9266.9547.7997.5699.227.092
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▁▁▁▁▁▁▁████28.10114.519.26920.21123.31728.27317.944424.702421.849419.663420.722NANANA7.799NANANA
us-gaap:AccountsReceivableNetCurrent █▇▇█▇▅▅▃▃▂▂▂▂▂▁▃▂▁50.82545.58346.83251.37444.8834.7136.30527.96524.3517.89419.15422.59521.70318.32617.30523.29719.64315.288
us-gaap:OtherAssetsCurrent ▂▂▂█▅▇▄▃▂▂▂▂▂▁▂▂▁▁5.3485.15.12516.09111.43113.5779.5536.6725.1634.934.8715.5226.3084.5224.755.2234.1793.875
us-gaap:Land ███████▁▁▁▁▁▁▁▁▁▁▁14.19814.16814.16814.16814.16814.16814.16813.26213.26213.26213.26213.26213.26213.26213.26213.26213.26213.262
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:PropertyPlantAndEquipmentGross ███▇▇▇▇▂▂▂▂▂▂▁▁▁▁▁3488.7323423.923380.0483305.1713243.6353208.4263168.5052040.4472004.6081963.1251935.9111897.1771857.6391821.781792.3231769.4751729.5261698.18
us-gaap:PropertyPlantAndEquipmentNet NANANA43.59243.82644.05544.10243.24943.54843.7144.00944.30744.60644.78245.08145.3845.68145.924
us-gaap:Goodwill ▇▇▇▁███628.144628.144628.144627.036628.343628.287628.287NANANA1.68NANANANANANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA21.27NANANA20.245NANANA7.059NANANA6.32NANANA
us-gaap:OtherAssetsNoncurrent ███▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁823.243810.399805.8766.8457.3748.6444.6764.9334.8344.6194.1224.2632.7362.7362.7097.7587.6217.806
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AccountsPayableCurrent █▃▆▆▂▃▆▄▄▂▃▃▃▂▂▅▃▁39.54625.63634.233.75924.29525.21434.88628.19328.25322.81924.93726.95626.18322.48222.9630.65827.0620.723
us-gaap:AccruedIncomeTaxesCurrent 0.246NANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▆▇█▇▆▅▅▃▃▂▄▃▃▂▂▂▁▁274.431289.735350.795305.398257.966238.404234.567144.307127.05886.688163.985151.68124.55195.3685.05293.41870.39650.78
us-gaap:LongTermDebtCurrent ▂██▇▁▁▁26.2776.28576.24171.94322.35422.31122.272NANANA0.0NANANA0.00.00.00.127
us-gaap:OtherLiabilitiesCurrent ▆██▇▅▆▆▄▄▂▂▂▁▂▁▂▁▁16.60819.14819.20318.10113.57815.39216.2412.91411.5939.2119.1158.5028.0378.3867.9268.577.3977.203
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:LongTermDebt ██████▇▂▂▂▁▁▁▁▁▁▁▁1398.3961379.3131352.321379.5551338.3331339.3071292.586511.076510.859510.903435.0431.341431.258431.175435.0431.009430.926433.515
us-gaap:LongTermDebtNoncurrent █▇▇███▇▂▂▂▁▁▁▁▁▁▁▁1372.1261303.0281287.581307.6121315.9791316.9961283.597511.076510.859510.903431.424431.341431.258431.175431.092431.009430.926433.388
us-gaap:DeferredIncomeTaxLiabilitiesNet ▅▃▅▁█▇█191.376189.531191.415186.952195.116194.823195.598NANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ██▇▆▇▆▆▁▁▁▁▂▂▂▁▁▁▁125.594124.265121.597107.129113.983111.272108.04473.00472.43272.21370.4975.87775.22974.73572.84173.53272.82872.092
us-gaap:OtherLiabilitiesNoncurrent █▇▆█▇▇▇▁▁▁▂▂▁▂▁▁▁▁24.95823.9321.78625.03722.67723.86422.30612.64312.45312.13713.52513.56912.97113.07313.01112.85312.75912.54
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:StockholdersEquity ██▇▇▇▇▇▇▇▇▇▂▂▁▂▁▁▁989.679978.296917.16913.061895.131883.541889.984896.664893.995888.293889.312474.957465.294457.83463.209452.471436.11421.4
us-gaap:CommonStockValue ██▇▇▇▆▆▆▆▆▆▁▁▁▁▁▁▁0.030.030.0290.0290.0290.0280.0280.0280.0280.0280.0280.0210.0210.0210.0210.0210.0210.021
us-gaap:AdditionalPaidInCapitalCommonStock ██▇▇▇▇▇▇▇▇▇▁▁▁▁▁▁▁579.057578.395510.158509.031508.098507.075506.639499.377497.633496.921495.36684.04584.37583.98684.86683.85682.62282.167
us-gaap:RetainedEarningsAccumulatedDeficit █▇█▇▆▅▅▇▇▆▆▆▅▄▅▄▂▁411.511400.897408.037403.923387.003376.447383.191397.259396.334391.344393.918390.891380.898373.823376.119366.818351.771337.572
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▁▁█▇▇█-0.919-1.026-1.0640.0780.001-0.0090.126NANANA0.00.00.00.02.2031.7761.6961.64
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities srt:ParentCompanyNANA-1.064NANANA0.126NANANANANANANANANANANA
us-gaap:StockIssuedDuringPeriodValueNewIssues ▁█-0.1266.896NANANANANANANA-0.01NANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▁█-0.1266.895NANANANANANANA-0.01NANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:CommonStockNA0.001NANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▁█0.7631.248NA1.0160.9660.208NA0.9360.7020.87NA0.4860.3620.457NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▆▆▇▄▁▇█▄▅▃▅▄▄▂▆▅▅33.7233.37633.43638.27524.4117.92938.72841.5224.56425.19317.63228.28522.84422.58213.14530.97628.74928.242
us-gaap:NetCashProvidedByUsedInInvestingActivities ██████▁███████████-55.065-51.94-73.049-60.112-38.629-42.469-902.995-42.245-38.158-34.373-40.886-38.579-35.815-31.563-18.418-42.47-22.035-30.951
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▂▂▁▂█▁▁▁█▁▁▁▁▁▁▁34.93623.80528.67118.7319.26244.869457.5093.57815.788.121430.64914.69514.9438.1365.5039.835-4.586-15.541
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ██████▁███13.5915.241-10.942-3.106-4.95610.329-406.7582.8532.186-1.059NANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▅▄▅▁▄▄█▂▃▄▂▂▄▃▃▄▄▅1.665-0.7620.861-5.381-0.633-0.3445.965-4.275-1.925-1.014-4.041-3.316-0.746-1.383-1.719-0.003-0.3091.595
us-gaap:DepreciationDepletionAndAmortization ██▇▇▇▇▆▃▃▃▂▂▂▂▁▁▁▁24.47523.93122.93923.07523.12622.48221.12615.78715.77315.80314.25814.2614.22914.1612.62412.61912.61212.646
us-gaap:IncreaseDecreaseInAccountsPayable █▄▇█▅▁▄▇▆▆▅▆▆▆▆▆▅▆4.272-3.7193.525.135-0.257-8.755-2.223.3360.3740.456-1.3632.0790.630.7840.6731.490.1680.557
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▆▅▆▅▇▅▁▆▃█▃▆▅▆▄▆▅▆0.492-0.5151.395-0.2262.754-1.51-9.7271.26-4.6945.692-4.4130.6110.0512.054-2.3551.642-1.411.296
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▆▆▇▄▁▇█▄▅▃▅▄▄▂▆▅▅33.7233.37633.43638.27524.4117.92938.72841.5224.56425.19317.63228.28522.84422.58213.14530.97628.74928.242
us-gaap:NetIncomeLoss ▇▃▅█▇▃▁▄▅▄▄▆▅▃▆▇▆▃20.7752.61613.28426.09319.7212.417-5.4869.47813.5385.8738.82315.78812.8711.28517.30519.5418.6883.671
us-gaap:ProfitLoss NANA13.28426.09319.7212.417-5.4869.47813.7625.8738.82315.78812.8711.28517.30519.5420.5843.671
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarningsNANANA26.09319.7212.417NA9.47813.5385.873NA15.78812.8711.285NANANANA
us-gaap:ShareBasedCompensation ▅██▆▆▁▅▆▄▅▄▃▂▃▆▃▂▃0.7911.281.2351.0581.0090.2510.850.9520.7180.8860.7340.5040.3920.4871.010.5890.4580.586
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ██████▁███████████-55.065-51.94-73.049-60.112-38.629-42.469-902.995-42.245-38.158-34.373-40.886-38.579-35.815-31.563-18.418-42.47-22.035-30.951
us-gaap:PaymentsToAcquireRealEstate ▃▅▂▃▃█▁▁▅▁▁▁▄▁▁▁▃▃0.0780.1520.0440.0670.0690.2550.00.00.1370.00.00.00.1230.00.0-0.0030.0570.062
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▂▂▁▂█▁▁▁█▁▁▁▁▁▁▁34.93623.80528.67118.7319.26244.869457.5093.57815.788.121430.64914.69514.9438.1365.5039.835-4.586-15.541
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▂▁▁▂▁▁█▁▁▂▁▁▁▁70.017.00.050.00.035.0510.00.00.080.00.00.00.00.0NANANANA
us-gaap:RepaymentsOfLongTermDebt █▁▄▂▁▁50.4581.15919.3427.8830.5351.171NANA0.00.00.00.00.00.00.00.02.6850.032
us-gaap:PaymentsOfDividendsCommonStock █▇▇▇▇▇▆▆▆▆▃▃▃▃▅▁▁▁10.1339.7249.1389.1319.1229.1188.5388.5368.5318.5295.7775.7775.7665.7547.9524.4644.464.456
us-gaap:Dividends █▁10.1339.724NA9.1319.1229.118NA8.5378.5328.528NA5.7775.7665.754NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:DebtInstrument,us-gaap:LongtermDebtType sjw:ConnecticutWaterCompany,sjw:ConnecticutInnovationsRevenueBonds,us-gaap:PublicUtilityBondsNANA5e-06NANANA5.0000000000000004e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:DebtInstrument,us-gaap:LongtermDebtType sjw:MaineWaterCompany,sjw:FirstMortgageBonds,us-gaap:PublicUtilityBondsNANA8.949999999999999e-06NANANA8.95e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:LongtermDebtType sjw:AvonWaterCompany,us-gaap:MortgagesNANA3.05e-06NANANA3.05e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:LongtermDebtType sjw:HeritageValleyWaterCompany,us-gaap:NotesPayableToBanksNANA4.75e-06NANANA4.75e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:LongtermDebtType sjw:SJWTXInc.,us-gaap:SeniorNotesNANA6.269999999999999e-06NANANA6.270000000000001e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:DebtInstrument,us-gaap:LongtermDebtType sjw:MaineWaterCompany,srt:Maximum,sjw:StateRevolvingFundLoans,us-gaap:PublicUtilityBondsNANA2.58e-06NANANA2.58e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:DebtInstrument,us-gaap:LongtermDebtType sjw:SanJoseWaterCompany,srt:Maximum,sjw:CaliforniaPollutionControlFinancingAuthorityRevenueBondsTotal,us-gaap:PublicUtilityBondsNANA5.0999999999999995e-06NANANA5.0999999999999993e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:DebtInstrument,us-gaap:LongtermDebtType sjw:SanJoseWaterCompany,srt:Minimum,sjw:CaliforniaPollutionControlFinancingAuthorityRevenueBondsTotal,us-gaap:PublicUtilityBondsNANA4.75e-06NANANA4.75e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:ConnecticutWaterCompany,srt:Maximum,us-gaap:NotesPayableToBanksNANA4.75e-06NANANA4.75e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:ConnecticutWaterCompany,srt:Maximum,us-gaap:SeniorNotesNANA3.5299999999999997e-06NANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:ConnecticutWaterCompany,srt:Minimum,us-gaap:NotesPayableToBanksNANA3.51e-06NANANA3.1600000000000005e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:ConnecticutWaterCompany,srt:Minimum,us-gaap:SeniorNotesNANA3.51e-06NANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:ConnecticutWaterServiceInc.,srt:Maximum,us-gaap:NotesPayableToBanksNANA4.15e-06NANANA4.15e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:ConnecticutWaterServiceInc.,srt:Minimum,us-gaap:NotesPayableToBanksNANA4.09e-06NANANA4.0899999999999996e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:MaineWaterCompany,srt:Maximum,us-gaap:NotesPayableToBanksNANA5.51e-06NANANA5.5100000000000004e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:MaineWaterCompany,srt:Minimum,us-gaap:NotesPayableToBanksNANA4.18e-06NANANA4.18e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:SanJoseWaterCompany,srt:Maximum,us-gaap:SeniorNotesNANA8.580000000000001e-06NANANA9.45e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType sjw:SanJoseWaterCompany,srt:Minimum,us-gaap:SeniorNotesNANA4.2900000000000004e-06NANANA4.29e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType srt:ParentCompany,srt:Maximum,us-gaap:SeniorNotesNANA4.35e-06NANANA4.35e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:LongtermDebtType srt:ParentCompany,srt:Minimum,us-gaap:SeniorNotesNANA2.47e-06NANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.030.030.0290.0290.0290.0280.0280.0280.0280.0280.0280.0210.0210.0210.0210.0210.0210.0210.02110101010101010101010101010109.7399.7249.7159.7079.6989.6849.6839.6769.662
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.70.80.80.80.80.80.80.80.90.90.90.90.90.90.90.90.90.90.90.91.01.01.0

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Common
Period End2020-12-312019-12-31
Value0.0290.028
Percentage of CommonStockValue100.0100.0
Percentage of Assets0.00.0
Percentage of Assets srt:ParentCompany0.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value282828282828282820202020202020202020202020202020202020202020181818181818181818
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value282828282828282820202020202020202020202020202020202020202020181818181818181818
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value29282828282828282020202020202020202020202020202020181818181818784181818740
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value29282828282828282020202020202020202020202020202020181818181818577181818528
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.70.090.470.910.690.08-0.20.330.480.210.380.770.630.060.840.950.910.180.670.930.820.170.790.470.370.230.281.90.340.040.230.440.370.070.320.540.280.060.360.440.290.030.440.580.24
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.690.090.460.910.690.08-0.190.330.470.210.380.760.620.060.840.940.90.180.670.920.820.160.790.460.360.230.281.880.340.040.230.440.370.070.310.530.280.060.350.440.290.030.430.580.24
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value791000.01280000.01235000.01058000.01009000.0251000.0850000.0952000.0718000.0886000.0734000.0504000.0392000.0487000.01010000.0589000.0458000.0586000.0375000.0464000.0379000.0473000.0395000.0447000.0362000.0399000.0257000.0323000.0207000.0244000.0126000.0197000.0242000.0347000.0113000.0168000.0100000.0183000.0138000.0185000.0126000.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.51.10.00.60.70.20.00.70.71.10.00.40.40.60.00.50.50.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

sjw:RestrictedStockAndDeferredRestrictedStock


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value791000.01099000.01235000.0906000.01009000.080000.0850000.0812000.0718000.0743000.0734000.0377000.0392000.0372000.01010000.0475000.0458000.0486000.0375000.0375000.0379000.0394000.0395000.0365000.0362000.0323000.0257000.0247000.0207000.0172000.0126000.0127000.0242000.0289000.0113000.0113000.0100000.0134000.0138000.0138000.0126000.0
Percentage of AllocatedShareBasedCompensationExpense100.085.9100.085.6100.031.9100.085.3100.083.9100.074.8100.076.4100.080.6100.082.9100.080.8100.083.3100.081.7100.081.0100.076.5100.070.5100.064.5100.083.3100.067.3100.073.2100.074.6100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.51.00.00.50.70.10.00.60.70.90.00.30.40.50.00.40.50.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax sjw:RestrictedStockAndDeferredRestrictedStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName

sjw:EmployeeStockPurchasePlan


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0181000.00152000.00171000.00140000.00143000.00127000.00115000.00114000.00100000.0089000.0079000.0082000.00
Percentage of AllocatedShareBasedCompensationExpense0.014.10.014.40.068.10.014.70.016.10.025.20.023.60.019.40.017.10.019.20.016.70.018.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.20.00.10.00.20.00.10.00.20.00.10.00.20.00.10.00.10.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax sjw:EmployeeStockPurchasePlan0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value202.6541226192.282-5.369.478135.8738.82315121.2851719183.7871318153.908169.4227.2064.686.021385.7161.1045.3049.1357.3511.6715.871105.261.0986.7277.9885.4790.599-0.1028.9063.276
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.22.40.015.713.92.20.07.213.07.40.013.213.11.70.015.619.65.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value212020191721251413121212111115131312121211111212111111109.519.4511101011101010109.969.8829.6589.63610108.639
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.518.60.011.712.520.20.011.212.915.60.010.612.115.20.010.714.018.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value241.721230232.855-5.83412177.9181119160.7052533325.2392131275.52615117.48911549.9381.4676.88814122.24710168.7581.90811139.2681.04313187.617
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.41.50.018.416.82.70.09.217.210.00.016.617.20.90.026.334.07.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.306-0.896-0.8464.5784.210.438-0.3482.5654.1922.0452.4744.1034.068-0.588.33813111.5687.99712102.122105.5374.4052.7945.587153.0920.5612.2115.8035.1910.934.326.8663.5570.7994.9565.363.8170.4335.6247.3333.101
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.2-0.80.02.73.00.40.02.04.02.60.03.44.1-0.80.010.812.52.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RegulatedOperation, sjw:ReportableSegmentOne


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value4.58-0.1160.4629.455.4491.202-0.762.9124.1542.0763.7745.914.650.4925.184139.9081.7933.78129.7052.272105.7424.4572.8185.056162.2080.5522.3055.845.3790.9224.4176.5573.6581.0465.2825.5823.905
Percentage of IncomeTaxExpenseBenefit138.512.9-54.6206.4129.4274.4218.4113.599.1101.5152.5144.0114.3-84.862.297.982.8114.347.397.188.9107.1102.4103.7101.2100.990.5104.271.498.4104.3100.6103.699.1102.295.5102.8130.9106.6104.1102.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.1-0.10.05.73.81.10.02.24.02.60.04.94.70.60.010.510.32.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RegulatedOperation, us-gaap:Corporate


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value4.58-0.1160.4629.455.4491.202-0.762.9124.1542.0763.7745.914.650.4925.184139.9081.7933.78129.7052.272105.7424.4572.8185.056162.2080.5522.3055.845.3790.9224.4176.5573.6581.0465.2825.5823.905
Percentage of IncomeTaxExpenseBenefit138.512.9-54.6206.4129.4274.4218.4113.599.1101.5152.5144.0114.3-84.862.297.982.8114.347.397.188.9107.1102.4103.7101.2100.990.5104.271.498.4104.3100.6103.699.1102.295.5102.8130.9106.6104.1102.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.1-0.10.05.73.81.10.02.24.02.60.04.94.70.60.010.510.32.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentOne


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.2030.1820.0890.1790.260.470.270.2160.130.0920.1790.2180.1930.1290.280.340.2360.1370.2290.2470.1680.1060.4010.0540.0930.1820.1570.0730.1170.1240.0760.1350.057-0.1440.1020.2460.1080.1250.0850.2270.177
Percentage of IncomeTaxExpenseBenefit6.1-20.3-10.53.96.2107.3-77.68.43.14.57.25.34.7-22.23.42.52.08.72.92.01.55.03.81.02.16.52.80.53.822.13.42.31.1-15.52.43.63.015.61.74.24.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.20.00.10.20.40.00.20.10.10.00.20.20.20.00.30.20.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentTwo


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.0960.1090.1060.1050.1240.1320.0410.0950.220.130.6040.1130.0920.094-1.650.1781.9880.1283.8810.1060.1070.1410.1080.0970.1630.1450.557-0.4410.2730.1530.1290.1320.0470.460.0950.338-0.035-0.024-0.047-0.063-0.102
Percentage of IncomeTaxExpenseBenefit2.9-12.2-12.52.32.930.1-11.83.75.26.424.42.82.3-16.2-19.81.316.68.248.50.81.06.61.01.83.75.210.0-2.88.827.35.82.30.949.52.24.9-1.0-3.0-0.9-1.2-2.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.00.10.10.10.00.10.20.20.00.10.10.10.00.12.10.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentTwo0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:AllOtherSegments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-1.573-1.071-1.503-5.156-1.623-1.3660.101-0.658-0.312-0.253-2.083-2.138-0.867-1.2954.524-0.237-0.168-0.490.1070.0140.931-0.397-0.758-0.356-0.308-0.351-0.183-0.2950.494-0.268-0.299-0.304-0.292-0.308-0.294-0.275-0.174-0.348-0.364-0.386-0.163
Percentage of IncomeTaxExpenseBenefit-47.6119.5177.7-112.6-38.6-311.9-29.0-25.7-7.4-12.4-84.2-52.1-21.3223.354.3-1.8-1.4-31.21.30.18.5-18.7-7.2-6.4-7.0-12.6-3.3-1.916.0-47.8-13.5-5.2-5.6-33.1-6.8-4.0-4.9-43.6-7.3-7.2-4.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.1-1.00.0-3.1-1.1-1.30.0-0.5-0.3-0.30.0-1.8-0.9-1.70.0-0.2-0.2-0.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:AllOtherSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:Corporate


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-1.274-0.78-1.308-4.872-1.239-0.7640.412-0.3470.038-0.031-1.3-1.807-0.582-1.0723.1540.2812.056-0.2254.2170.3671.206-0.15-0.249-0.205-0.052-0.0240.531-0.6630.8840.009-0.094-0.037-0.1880.008-0.0970.309-0.101-0.247-0.326-0.222-0.088
Percentage of IncomeTaxExpenseBenefit-38.587.1154.6-106.4-29.4-174.4-118.4-13.50.9-1.5-52.5-44.0-14.3184.837.82.117.2-14.352.72.911.1-7.1-2.4-3.7-1.2-0.99.5-4.228.61.6-4.3-0.6-3.60.9-2.24.5-2.8-30.9-6.6-4.1-2.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-0.70.0-2.9-0.9-0.70.0-0.30.0-0.00.0-1.5-0.6-1.40.00.22.1-0.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.8620.1583.3567.0190.055-0.050.1626.7059.5810.08.6054.7250.3350.08519140.2370.09.445214.167-7.956.0024.1695.552-6.04.3940.031.91-0.012.0010.9251.2470.0131.9610.359-3.7650.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.10.04.20.0-0.00.05.19.20.00.03.90.30.10.011.40.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value131314131313126.5886.7145.7916.1196.0776.0846.0525.5755.5415.7566.0575.4265.4695.4355.5165.6185.6525.3974.9544.875.0094.9565.0225.0635.055.0755.124.682
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.312.00.07.99.312.60.05.06.47.30.05.16.28.00.04.46.08.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestExpense us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RegulatedOperation, sjw:ReportableSegmentOne


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value8.3478.1719.3028.1128.2898.1747.6396.0446.175.225.5755.5345.545.5085.0314.9995.2155.4254.7384.6484.6554.6264.5844.7074.8144.834.7624.5734.1394.0814.1214.1974.1464.1524.1074.144.1154.1374.0814.1594.235
Percentage of InterestExpense61.060.863.661.662.961.560.191.791.990.191.191.191.191.090.290.290.689.60.085.785.185.10.085.385.785.50.084.783.583.80.083.883.782.70.081.881.581.50.081.290.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.77.30.04.95.87.80.04.65.96.60.04.65.67.30.04.05.47.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RegulatedOperation, us-gaap:Corporate


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value8.3478.1719.3028.1128.2898.1747.6396.0446.175.225.5755.5345.545.5085.0314.9995.2155.4254.7384.6484.6554.6264.5844.7074.8144.834.7624.5734.1394.0814.1214.1974.1464.1524.1074.144.1154.1374.0814.1594.235
Percentage of InterestExpense61.060.863.661.662.961.560.191.791.990.191.191.191.191.090.290.290.689.60.085.785.185.10.085.385.785.50.084.783.583.80.083.883.782.70.081.881.581.50.081.290.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.77.30.04.95.87.80.04.65.96.60.04.65.67.30.04.05.47.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:AllOtherSegments


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value5.3345.2685.3155.0624.8915.115.0640.5440.5440.5710.5440.5430.5440.5440.5440.5440.5440.5670.5640.5620.5740.5590.5620.5540.5490.5670.5440.5620.5530.5520.5470.5440.5450.550.5440.5430.5440.5440.5430.5380.02
Percentage of InterestExpense39.039.236.438.437.138.539.98.38.19.98.98.98.99.09.89.89.59.40.010.410.510.30.010.09.810.00.010.411.211.30.010.911.011.00.010.710.810.70.010.50.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.64.70.03.03.44.90.00.40.50.70.00.50.60.70.00.40.60.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:AllOtherSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:Corporate


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value5.3345.2685.3155.0624.8915.115.0640.5440.5440.5710.5440.5430.5440.5440.5440.5420.5410.6320.770.7780.8140.8090.8160.8090.8040.8220.8050.8240.8150.7890.8140.8120.810.870.890.9230.9350.9381.0610.9610.447
Percentage of InterestExpense39.039.236.438.437.138.539.98.38.19.98.98.98.99.09.89.89.410.40.014.314.914.90.014.714.314.50.015.316.516.20.016.216.317.30.018.218.518.50.018.89.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.64.70.03.03.44.90.00.40.50.70.00.50.60.70.00.40.60.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense Debt

us-gaap:InterestExpenseDebt

us-gaap:InterestExpenseDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value131314131313126.5886.7145.7916.1196.0776.0846.0525.4645.4875.6965.9635.1664.9935.0075.0395.0875.25.2995.3395.2785.054.5534.5424.6224.7224.6784.6454.644.6834.6594.684.6244.6844.2354.2564.2524.1663.636
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.312.00.07.99.312.60.05.06.47.30.05.16.28.00.04.45.98.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value199.5161910209.373126.4897.0286.3047.333
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.48.50.06.214.58.90.05.06.78.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value202.6161326192.417-5.4869.478135.8738.82315121.2851719183.6711318163.378169.5347.4614.6955.688386.8460.9064.6778.957.441.3175.924105.2011.1096.6028.2155.4510.618.118104.516
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.12.30.015.613.92.30.07.213.07.40.013.213.11.70.015.519.55.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RegulatedOperation, sjw:ReportableSegmentOne


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value205.6991625225.8281110136.11122153.9497.78419153.571169.6987.5564.7016.211375.5910.9034.8739.1147.6861.66.3619.6325.3641.4547.0528.5095.549
Percentage of NetIncomeLoss99.1217.9121.496.0112.8241.1-218.1115.7100.9103.9125.0141.5116.7107.656.7101.489.6105.7101.6101.7101.3100.1109.298.881.799.7104.2101.8103.3121.5107.495.5103.1131.1106.8103.6101.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.05.10.015.015.65.50.08.413.17.70.018.615.35.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RegulatedOperation, us-gaap:Corporate


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value205.6991625225.8281110136.11122153.9497.78419153.571169.6987.5564.7016.211375.5910.9034.8739.1147.6861.66.3619.6325.3641.4547.0528.5095.549
Percentage of NetIncomeLoss99.1217.9121.496.0112.8241.1-218.1115.7100.9103.9125.0141.5116.7107.656.7101.489.6105.7101.6101.7101.3100.1109.298.881.799.7104.2101.8103.3121.5107.495.5103.1131.1106.8103.6101.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.05.10.015.015.65.50.08.413.17.70.018.615.35.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentOne


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.6770.7220.9210.8270.8811.470.8920.5550.3360.2360.4590.5610.4970.1720.3050.330.2140.1050.638-0.0290.0550.2180.3170.0680.1320.1510.0830.1090.108-0.5080.1140.3260.1070.160.1030.3120.251
Percentage of NetIncomeLoss3.327.66.93.24.560.8-16.35.92.54.05.23.63.94.72.21.71.33.13.9-0.30.74.65.60.21.916.71.81.21.5-38.61.93.22.114.41.63.84.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.60.00.50.61.40.00.40.30.30.00.50.50.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentTwo


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.2960.3230.3140.310.4430.3880.3390.3040.6620.318-0.1260.3590.2960.366.7360.2390.1780.2530.1850.2360.2720.26-0.3290.7950.380.2040.1190.1320.0330.636-0.1620.492-0.051-0.035-0.06-0.08-0.147
Percentage of NetIncomeLoss1.412.32.41.22.216.1-6.23.24.95.4-1.42.32.39.849.11.31.17.51.12.53.65.5-5.82.15.622.52.51.50.448.3-2.74.9-1.0-3.2-0.9-1.0-2.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.30.00.20.30.40.00.20.60.40.00.30.30.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentTwo0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:AllOtherSegments


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-0.783-4.128-4.079-0.097-3.839-5.269-18.682-2.345-1.122-0.781-2.541-7.465-2.944-0.81-1.098-0.8261.36-0.551-1.078-0.371-0.422-0.484-0.511-0.4040.743-0.352-0.398-0.405-0.387-0.411-0.389-0.366-0.219-0.47-0.493-0.526-0.202
Percentage of NetIncomeLoss-3.8-157.8-30.7-0.4-19.5-218.0340.5-24.7-8.3-13.3-28.8-47.3-22.9-22.1-8.0-4.48.1-16.3-6.7-3.9-5.7-10.3-9.0-1.110.9-38.9-8.5-4.5-5.2-31.2-6.6-3.6-4.2-42.4-7.5-6.4-3.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-3.70.0-0.1-2.7-5.00.0-1.8-1.1-1.00.0-6.2-3.0-1.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:AllOtherSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:Corporate


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.19-3.083-2.8441.04-2.515-3.411-17.451-1.486-0.124-0.227-2.208-6.545-2.151-0.2785.943-0.2571.752-0.193-0.255-0.164-0.095-0.006-0.5230.4591.2550.003-0.196-0.164-0.246-0.283-0.4370.452-0.163-0.345-0.45-0.294-0.098
Percentage of NetIncomeLoss0.9-117.9-21.44.0-12.8-141.1318.1-15.7-0.9-3.9-25.0-41.5-16.7-7.643.3-1.410.4-5.7-1.6-1.7-1.3-0.1-9.21.218.30.3-4.2-1.8-3.3-21.5-7.44.5-3.1-31.1-6.8-3.6-1.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-2.70.00.6-1.8-3.20.0-1.1-0.1-0.30.0-5.5-2.2-0.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value202.616192.417
Percentage of NetIncomeLoss100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.12.313.92.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3213244136156.0161721121725227.3311838301016362910311817121559126.0541119165.7731420136.7251618135.6013.4711711
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.211.70.025.125.414.70.013.121.115.70.021.523.29.70.030.432.115.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RegulatedOperation, sjw:ReportableSegmentOne


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value32122341351518202414203325101737301015352910311716111458115.1631018166.1731320126.474161813
Percentage of OperatingIncomeLoss100.198.897.399.799.599.5308.0118.8110.2117.4117.4130.8110.3145.396.298.499.197.895.697.297.694.798.797.195.693.494.198.893.485.394.496.397.4106.996.996.295.096.398.698.098.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.211.50.025.025.214.60.015.523.218.50.028.125.614.00.029.931.815.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RegulatedOperation, us-gaap:Corporate


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value32122341351518202414203325101737301015352910311716111458115.1631018166.1731320126.474161813
Percentage of OperatingIncomeLoss100.198.897.399.799.599.5308.0118.8110.2117.4117.4130.8110.3145.396.298.499.197.895.697.297.694.798.797.195.693.494.198.893.485.394.496.397.4106.996.996.295.096.398.698.098.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.211.50.025.025.214.60.015.523.218.50.028.125.614.00.029.931.815.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentOne


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.7420.6760.7950.6530.9341.6560.9410.790.4670.3280.6370.780.6890.460.4950.9490.6870.4330.6580.7010.5040.3221.1420.1240.2450.4850.5650.2310.3370.3560.2480.3210.226-0.5960.2690.6220.2630.3260.2250.5590.461
Percentage of OperatingIncomeLoss2.35.23.31.62.610.715.64.62.12.63.63.03.06.32.72.52.24.04.01.91.73.03.60.71.43.83.60.42.85.92.21.71.3-10.31.93.01.94.81.43.03.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.60.00.40.71.60.00.60.40.40.00.60.70.60.00.80.70.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentTwo


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.4390.4630.4470.4420.5940.5390.3920.4180.3610.4750.5140.5070.430.4920.4980.5160.3850.6150.5950.6780.6350.7350.6530.7020.80.7540.5960.7290.7810.720.6490.6650.4460.4450.4030.3810.4240.4050.4790.3530.22
Percentage of OperatingIncomeLoss1.33.51.81.11.63.56.52.41.63.82.92.01.96.72.71.31.35.73.61.92.16.92.13.84.65.93.81.26.411.95.73.42.67.72.91.83.16.02.91.91.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.40.00.30.40.50.00.30.30.60.00.40.40.60.00.40.40.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentTwo0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:AllOtherSegments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-1.207-0.978-0.592-0.973-1.345-2.118-13.848-4.418-3.066-2.957-4.185-9.238-3.476-4.273-0.295-0.859-0.804-0.812-0.53-0.356-0.418-0.496-1.377-0.289-0.291-0.399-0.241-0.249-0.322-0.185-0.263-0.274-0.232-0.249-0.228-0.22-0.007-0.48-0.472-0.541-0.481
Percentage of OperatingIncomeLoss-3.7-7.5-2.4-2.3-3.7-13.7-230.2-25.9-14.0-23.8-23.9-35.8-15.2-58.3-1.6-2.2-2.6-7.5-3.2-1.0-1.4-4.7-4.3-1.6-1.7-3.1-1.5-0.4-2.7-3.1-2.3-1.4-1.4-4.3-1.6-1.1-0.1-7.1-2.9-2.9-3.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.8-0.90.0-0.6-0.9-2.00.0-3.4-2.9-3.70.0-7.7-3.5-5.60.0-0.7-0.8-1.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:AllOtherSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:Corporate


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-0.0260.1610.650.1220.1830.077-12.515-3.21-2.238-2.154-3.034-7.951-2.357-3.3210.6980.6060.2680.2360.7231.0230.7210.5610.4180.5370.7540.840.920.7110.7960.8910.6340.7120.44-0.40.4440.7830.680.2510.2320.3710.2
Percentage of OperatingIncomeLoss-0.11.22.70.30.50.5-208.0-18.8-10.2-17.4-17.4-30.8-10.3-45.33.81.60.92.24.42.82.45.31.32.94.46.65.91.26.614.75.63.72.6-6.93.13.85.03.71.42.01.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.10.00.10.10.10.0-2.5-2.1-2.70.0-6.6-2.4-4.40.00.50.30.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-30
Value107000.038000.076000.010000.0-135000.00
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.00.0-0.10.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1784000.01754000.02971000.01130000.01048000.0757000.0901000.0303000.0517000.0390000.0514000.0538000.0679000.0676000.0484000.0341000.0596000.0445000.0531000.0410000.0150000.0309000.0399000.0398000.0230000.0293000.01211000.057000.0439000.0220000.0411000.0354000.0589000.0371000.01070000.0165000.0162000.0198000.0144000.0150000.0106000.0113000.0183000.0145000.0150000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.60.00.70.70.70.00.20.50.50.00.40.70.90.00.30.60.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1326192.417-5.4869.478135.8738.82315121.2851719203.671131816
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.015.613.92.30.07.213.27.40.013.213.11.70.015.521.55.40.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value26192.4179.478135.87315121.285
Percentage of ProfitLoss100.0100.0100.0100.098.4100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.613.92.37.213.07.413.213.11.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.0

Regulated Operating Revenue

us-gaap:RegulatedOperatingRevenue

us-gaap:RegulatedOperatingRevenue


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value15211413516514711512511310277981249975931241026979112866187827262691257054678574506282655162735943507054
Percentage of RegulatedOperatingRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax103.4102.30.099.3103.5110.10.087.298.798.40.0104.0100.798.90.099.1106.5100.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RegulatedOperatingRevenue us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RegulatedOperation, sjw:ReportableSegmentOne


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1481111311611431111211109975951219572901209866761088358847969586512166516381714759796248607156
Percentage of RegulatedOperatingRevenue97.497.097.297.597.296.296.996.796.996.796.796.996.796.496.696.996.895.996.096.696.395.196.695.895.394.895.297.295.294.694.696.196.395.396.096.395.995.596.396.196.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.799.20.096.8100.6105.90.084.395.795.20.0100.897.395.40.096.0103.196.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RegulatedOperation, us-gaap:Corporate


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1481111311611431111211109975951219572901209866761088358847969586512166516381714759796248607156
Percentage of RegulatedOperatingRevenue97.497.097.297.597.296.296.996.796.996.796.796.996.796.496.696.996.895.996.096.696.395.196.695.895.394.895.297.295.294.694.696.196.395.396.096.395.995.596.396.196.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.799.20.096.8100.6105.90.084.395.795.20.0100.897.395.40.096.0103.196.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentOne


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value2.6842.0452.4572.8142.6933.0172.5512.4261.8231.1691.862.4031.9671.3481.7852.461.911.2641.642.0561.5421.2041.3441.7661.5881.4471.6551.7391.5531.2281.3581.8591.5791.0861.1721.8551.4221.0741.0561.7041.268
Percentage of RegulatedOperatingRevenue1.81.81.81.71.82.62.02.11.81.51.91.92.01.81.92.01.91.82.11.81.82.01.52.12.22.32.41.42.22.22.02.22.12.21.92.32.22.11.72.32.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.81.80.01.71.92.90.01.91.71.50.02.02.01.80.02.02.01.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentTwo


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1.321.3441.3151.4031.4441.371.3091.3531.3691.3661.3791.4411.3211.3411.4211.3911.3271.5631.5081.7861.6561.7671.6551.7521.8031.7781.6711.771.8361.7422.2711.4851.1941.2551.3041.1861.2511.2511.2261.1971.079
Percentage of RegulatedOperatingRevenue0.91.21.00.81.01.21.01.21.31.81.41.21.31.81.51.11.32.31.91.61.92.91.92.12.52.92.41.42.63.23.41.71.62.52.11.41.92.42.01.61.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.20.00.81.01.30.01.01.31.70.01.21.31.80.01.11.42.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentTwo0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:Corporate


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value4.0043.3893.7724.2174.1374.3873.863.7793.1922.5353.2393.8443.2882.6893.2063.8513.2372.8273.1483.8423.1982.9712.9993.5183.3913.2253.3263.5093.3892.973.6293.3442.7732.3412.4763.0412.6732.3252.2822.9012.347
Percentage of RegulatedOperatingRevenue2.63.02.82.52.83.83.13.33.13.33.33.13.33.63.43.13.24.14.03.43.74.93.44.24.75.24.82.84.85.45.43.93.74.74.03.74.14.53.73.94.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.73.00.02.52.94.20.02.93.13.20.03.23.33.50.03.13.44.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value14711213416714210513313010478941209875911259568
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value152114135165147115125113102779812499759312410269
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax103.4102.3100.699.3103.5110.194.187.298.798.4103.9104.0100.798.9102.199.1106.5100.7

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value34093332331132593209317431322022200319581956153615001463145815111471143514431454139913551340132312951277126912101147112311091149113010981087107510551042103810131000935
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-31
Value15521481
Percentage of Assets46.947.3
Percentage of Assets46.947.3
Percentage of Assets srt:ParentCompany100.0100.0

us-gaap:Assets us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RegulatedOperation, sjw:ReportableSegmentOne


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3300321831973131307930543016155615371492149214801449141314061438139813601368135913141265125312331205118811801121105310271013105310341004991980954942917885865844
Percentage of Assets96.896.696.696.195.996.296.376.976.776.276.396.396.696.596.495.295.194.894.893.593.993.493.593.293.193.093.092.791.891.491.391.691.591.491.291.190.590.488.387.386.590.3
Percentage of Assets96.896.696.696.195.996.296.376.976.776.276.396.396.696.596.495.295.194.894.893.593.993.493.593.293.193.093.092.791.891.491.391.691.591.491.291.190.590.488.387.386.590.3
Percentage of Assets us-gaap:RegulatedOperation sjw:ReportableSegmentOne100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatedOperation, us-gaap:Corporate


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3300321831973131307930543016155615371492149214801449141314061438139813601368135913141265125312331205118811801121105310271013105310341004991980954942917885865844
Percentage of Assets96.896.696.696.195.996.296.376.976.776.276.396.396.696.596.495.295.194.894.893.593.993.493.593.293.193.093.092.791.891.491.391.691.591.491.291.190.590.488.387.386.590.3
Percentage of Assets96.896.696.696.195.996.296.376.976.776.276.396.396.696.596.495.295.194.894.893.593.993.493.593.293.193.093.092.791.891.491.391.691.591.491.291.190.590.488.387.386.590.3
Percentage of Assets us-gaap:RegulatedOperation us-gaap:Corporate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentOne


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value8.2487.6258.8698.5899.9139.175.5075.8996.1495.8254.4894.5773.7683.694.47120191817181818181818181817171616161616131313121111119.849
Percentage of Assets0.20.20.30.30.30.30.20.30.30.30.20.30.30.30.31.31.31.31.21.21.41.41.41.41.41.51.41.51.51.51.51.41.51.51.21.21.21.21.11.11.11.1
Percentage of Assets0.20.20.30.30.30.30.20.30.30.30.20.30.30.30.31.31.31.31.21.21.41.41.41.41.41.51.41.51.51.51.51.41.51.51.21.21.21.21.11.11.11.1
Percentage of Assets us-gaap:UnregulatedOperation sjw:ReportableSegmentOne100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentTwo


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value454444454446464646464647464747484954547564656566676665666670717171697474797980808181
Percentage of Assets1.31.31.31.41.41.51.52.32.32.42.43.13.13.23.33.23.43.83.85.24.64.84.95.05.25.25.25.55.86.36.56.26.36.36.96.97.57.67.78.08.18.7
Percentage of Assets1.31.31.31.41.41.51.52.32.32.42.43.13.13.23.33.23.43.83.85.24.64.84.95.05.25.25.25.55.86.36.56.26.36.36.96.97.57.67.78.08.18.7
Percentage of Assets us-gaap:UnregulatedOperation sjw:ReportableSegmentTwo100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnregulatedOperation, us-gaap:AllOtherSegments


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value556160737664634144134134124.096-0.117-0.496-0.3593.9813.9242.6621.8780.9210.9295.6263.455.1044.3614.7114.8034.116109.1878.8158.5117.7278.5877.4858.0177.9868.365293542-0.212
Percentage of Assets1.61.81.82.32.42.02.020.520.621.121.10.3-0.0-0.0-0.00.30.30.20.10.10.10.40.30.40.30.40.40.30.90.80.80.70.70.80.70.70.80.82.83.54.2-0.0
Percentage of Assets1.61.81.82.32.42.02.020.520.621.121.10.3-0.0-0.0-0.00.30.30.20.10.10.10.40.30.40.30.40.40.30.90.80.80.70.70.80.70.70.80.82.83.54.2-0.0
Percentage of Assets us-gaap:UnregulatedOperation us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnregulatedOperation, us-gaap:Corporate


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value109113113127130119115466466466463565050517372757494848987899089888893969696959495951009912112813590
Percentage of Assets3.23.43.43.94.13.83.723.123.323.823.73.73.43.53.64.84.95.25.26.56.16.66.56.86.97.07.07.38.28.68.78.48.58.68.88.99.59.611.712.713.59.7
Percentage of Assets3.23.43.43.94.13.83.723.123.323.823.73.73.43.53.64.84.95.25.26.56.16.66.56.86.97.07.07.38.28.68.78.48.58.68.88.99.59.611.712.713.59.7
Percentage of Assets us-gaap:UnregulatedOperation us-gaap:Corporate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value34093332331132593209317431322022200319581956153615001463145815111471143514431454139913551340132312951277126912101147112311091149113010981087107510551042103810131000935
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-31
Value15521481
Percentage of LiabilitiesAndStockholdersEquity46.947.3
Percentage of Assets46.947.3
Percentage of Assets srt:ParentCompany100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value989978917913895883889896893888889474465457463452436421421411396384383371364361360356321319321319313273274271264262264260255255252254
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.029.427.728.027.927.828.444.344.645.345.530.931.031.331.829.929.629.329.228.328.328.328.628.028.128.328.429.528.028.428.927.827.724.925.325.325.125.225.425.725.527.30.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-31
Value917889
Percentage of StockholdersEquity100.0100.0
Percentage of Assets27.728.4
Percentage of Assets srt:ParentCompany59.160.1

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-0.919-1.026-1.0640.0780.001-0.0090.1260.00.00.00.00.00.00.02.2031.5242.3112.5173.3872.312.2742.3591319
Percentage of StockholdersEquity-0.1-0.1-0.10.00.0-0.00.00.00.00.00.00.00.00.00.50.40.60.71.10.80.90.95.27.6
Percentage of Assets-0.0-0.0-0.00.00.0-0.00.00.00.00.00.00.00.00.00.20.10.20.20.30.20.20.30.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value57957851050950850750649949749649584848384816866632624232220
Percentage of StockholdersEquity58.559.155.655.756.857.456.955.755.755.955.717.718.118.318.319.417.918.419.69.59.39.28.78.1
Percentage of Assets17.017.415.415.615.816.016.224.724.825.425.35.55.65.75.85.75.15.25.72.42.42.50.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value0.030.030.0290.0290.0290.0280.0280.0280.0280.0280.0280.0210.0210.0210.0210.0211010109.7249.6849.6629.6359.611
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.02.82.93.33.53.73.83.83.8
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.80.80.90.90.91.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value411400408403387376383397396391393390380373376338302280244236227219207204
Percentage of StockholdersEquity41.641.044.544.243.242.643.144.344.344.144.382.381.981.781.280.378.778.076.186.186.286.182.280.5
Percentage of Assets12.112.012.312.412.111.912.219.619.820.020.125.425.425.525.823.422.522.122.021.721.923.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value146123127154145128122507503488502807361668772739913392627376706368704740394948344262585968898338
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.33.73.84.84.54.13.925.125.224.925.75.24.94.24.65.85.05.16.99.26.64.65.55.85.44.95.45.84.13.63.64.34.33.13.95.85.55.76.68.88.44.1

us-gaap:AssetsCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Assets
Period End2020-12-312019-12-31
Value1615
Percentage of AssetsCurrent13.012.5
Percentage of Assets0.50.5
Percentage of Assets srt:ParentCompany1.11.0

Cash

us-gaap:Cash

us-gaap:Cash


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value25115.26920232812129.8497.6638.7227.799
Percentage of Cash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.30.20.60.70.90.40.60.50.40.40.5

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value25115.269232812424421419420138.9266.9547.7997.5699.227.0926.34917128.6925.2396.2715.2385.4172.3995.5996.0233.1182.2993.2194.0052.1452.5226.6849.258192643452.3541.733.3353.4951.4163.406
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.30.20.70.90.421.021.121.421.50.90.60.50.50.50.60.50.41.20.90.60.40.50.40.40.20.50.50.30.20.30.40.20.20.60.91.82.64.34.50.00.20.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-31
Value28149.269202328174244214194207.799255.239
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.40.30.60.70.90.621.021.121.421.50.51.80.4

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.4361.0354120.308
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents4.75.898.03.9
Percentage of Assets0.00.021.10.0
Percentage of Assets srt:ParentCompany0.00.10.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value504546514434362724171922211817231915162117131620171714181714141818131217151212161512
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.41.41.61.41.11.21.41.20.91.01.51.41.31.21.51.31.11.11.51.21.01.21.51.41.41.21.51.51.31.31.61.61.21.11.61.41.21.21.71.51.3

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value5.3485.15.1251611139.5536.6725.1634.934.8715.5226.3084.5224.755.2234.1793.8754.4025.0454.5264.3314.7444.9483.5140.8130.01.5563.8835.0215.7390.0
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0
Percentage of Assets0.20.20.20.50.40.40.30.30.30.30.20.40.40.30.30.30.30.30.30.30.30.30.40.40.30.10.00.10.40.50.60.0

us-gaap:OtherAssetsCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-31
Value0.124
Percentage of OtherAssetsCurrent2.4
Percentage of Assets0.0
Percentage of Assets srt:ParentCompany0.0

Land

us-gaap:Land

us-gaap:Land


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1414141414141413131313131313131313131517151717171717171717171818181818182021
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.40.40.40.50.70.70.70.70.90.90.90.90.90.90.91.11.21.11.31.31.31.31.41.41.41.51.51.71.61.71.71.71.81.92.1

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value348834233380330532433208316820402004196319351897185718211792176917291698166616421601156515241492146214351413139213671340131412871263123912161191116011341112108610701036
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets102.3102.8102.1101.4101.0101.1101.2100.9100.0100.299.0123.4123.8124.4122.9117.1117.6118.3115.5113.0114.5115.5113.7112.8112.9112.4111.3115.1119.3119.3118.4112.0111.7112.8111.8110.8109.9108.8107.1107.3107.0110.9

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value434344444343434444444445454545505050616161616162626263676868666564737878787980
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.41.41.42.12.22.22.22.93.03.13.13.03.13.23.53.53.64.54.64.74.74.84.95.25.55.66.16.06.16.16.06.06.97.57.67.87.98.6

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value6286286286276286286281.68
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.418.919.019.219.619.820.10.1

us-gaap:Goodwill us-gaap:BusinessAcquisition

sjw:CTWS


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-10-09
Value626625626626626
Percentage of Goodwill99.799.799.799.70.0
Percentage of Assets18.919.219.519.70.0
Percentage of Assets sjw:CTWS0.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value21207.0596.32161513131010
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.40.41.11.21.11.21.01.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value8238108056.8457.3748.6444.6764.9334.8344.6194.1224.2632.7362.7362.7097.7587.6217.8067.8447.9467.9277.7546.5686.5726.4596.5426.396.4376.3766.4386.1736.0665.9395.8425.064.4074.253.8623.9954.0583.6573.233
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.124.324.30.20.20.30.10.20.20.20.20.30.20.20.20.50.50.50.50.50.60.60.50.50.50.50.50.50.60.60.60.50.50.50.50.40.40.40.40.40.40.3

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2020-09-302020-06-302020-03-312019-12-31
Value779781776759
Percentage of OtherAssets100.0100.0100.0100.0
Percentage of Assets23.924.424.524.3

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value39253433242534282822242626222230272018212319161713117.001121210121115108.4811714107.4176.6879.7655.487
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.20.81.01.00.80.81.11.41.41.21.31.81.71.51.62.01.81.41.31.51.71.41.21.31.00.90.61.01.11.01.11.01.41.00.81.61.41.00.70.71.00.6

us-gaap:AccountsPayableCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Accounts
Period End2020-12-312019-12-31
Value0.171.042
Percentage of AccountsPayableCurrent0.53.0
Percentage of Assets0.00.0
Percentage of Assets srt:ParentCompany0.00.1

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedIncomeTaxesCurrent


Accrued
Period End2021-06-30
Value246000.0
Percentage of AccruedIncomeTaxesCurrent100.0
Percentage of Assets0.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value27428935030525723823414412786163151124958593705063151120977973594844519271594945594950453128383929
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.08.710.69.48.07.57.57.16.34.48.49.98.36.55.86.24.83.54.410.48.67.25.95.54.63.83.54.38.06.45.34.34.05.44.54.74.43.12.73.83.93.1

us-gaap:LiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-31
Value7632
Percentage of LiabilitiesCurrent21.813.9
Percentage of Assets2.31.0
Percentage of Assets srt:ParentCompany4.92.2

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value267676712222220.00.00.00.00.1270.1251111143.4913.5630.5970.6130.5840.6240.5690.5370.5540.5890.540.5795.3925.418.340.8280.8381.1541.1191.133
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.82.32.32.20.70.70.70.00.00.00.00.00.00.80.81.10.30.30.00.00.00.10.00.00.00.10.00.10.50.50.80.10.10.10.10.1

us-gaap:LongTermDebtCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Long
Period End2020-12-31
Value49
Percentage of LongTermDebtCurrent65.5
Percentage of Assets1.5
Percentage of Assets srt:ParentCompany3.2

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1619191813151612119.2119.1158.5028.0378.3867.9268.577.3977.2036.9777.4176.5855.7936.1556.3196.1345.9776.1566.1185.5845.3025.6886.0578.8038.0464.9734.8944.4174.1384.4034.4214.2654.429
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.60.60.60.40.50.50.60.60.50.50.60.50.60.50.60.50.50.50.50.50.40.50.50.50.50.50.50.50.50.50.50.80.70.50.50.40.40.40.40.40.5

us-gaap:OtherLiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-31
Value0.2520.912
Percentage of OtherLiabilitiesCurrent1.35.6
Percentage of Assets0.00.0
Percentage of Assets srt:ParentCompany0.00.1

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1398137913521379133813391292511510510435431431431435431430433437375375380384384384384384385335335335335335336340341344344
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets41.041.440.842.341.742.241.325.325.526.122.228.128.729.529.828.529.330.230.325.826.928.128.729.129.730.130.331.829.229.830.229.229.730.631.431.732.633.2

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities

sjw:ConnecticutWaterCompany


Long
Period End2020-12-312019-12-312018-12-31
Value2251980.0
Percentage of LongTermDebt16.715.40.0
Percentage of Assets6.86.30.0
Percentage of Assets sjw:ConnecticutWaterCompany0.00.00.0

sjw:MaineWaterCompany


Long
Period End2020-12-312019-12-312018-12-31
Value39380.0
Percentage of LongTermDebt2.92.90.0
Percentage of Assets1.21.20.0
Percentage of Assets sjw:MaineWaterCompany0.00.00.0

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument

sjw:SanJoseWaterCompany, sjw:CaliforniaPollutionControlFinancingAuthorityRevenueBondsTotal


Long
Period End2020-12-312019-12-312018-12-31
Value440450370
Percentage of LongTermDebt32.534.885.1
Percentage of Assets13.314.418.9
Percentage of Assets sjw:SanJoseWaterCompany sjw:CaliforniaPollutionControlFinancingAuthorityRevenueBondsTotal0.00.00.0

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

sjw:ConnecticutWaterCompany, sjw:ConnecticutInnovationsRevenueBonds, us-gaap:PublicUtilityBonds


Long
Period End2020-12-312019-12-312018-12-31
Value22220.0
Percentage of LongTermDebt1.61.70.0
Percentage of Assets0.70.70.0
Percentage of Assets sjw:ConnecticutWaterCompany sjw:ConnecticutInnovationsRevenueBonds us-gaap:PublicUtilityBonds0.00.00.0

sjw:ConnecticutWaterCompany, sjw:ConnecticutInnovationsRevenueBondsTotal, us-gaap:PublicUtilityBonds


Long
Period End2020-12-312019-12-31
Value4444
Percentage of LongTermDebt3.33.4
Percentage of Assets1.31.4
Percentage of Assets sjw:ConnecticutWaterCompany sjw:ConnecticutInnovationsRevenueBondsTotal us-gaap:PublicUtilityBonds0.00.0

sjw:ConnecticutWaterCompany, sjw:ConnecticutInnovationsRevenueBondsVariableRate, us-gaap:PublicUtilityBonds


Long
Period End2020-12-312019-12-312018-12-31
Value22220.0
Percentage of LongTermDebt1.61.70.0
Percentage of Assets0.70.70.0
Percentage of Assets sjw:ConnecticutWaterCompany sjw:ConnecticutInnovationsRevenueBondsVariableRate us-gaap:PublicUtilityBonds0.00.00.0

sjw:MaineWaterCompany, sjw:FirstMortgageBonds, us-gaap:PublicUtilityBonds


Long
Period End2020-12-312019-12-31
Value3.64.5
Percentage of LongTermDebt0.30.3
Percentage of Assets0.10.1
Percentage of Assets sjw:MaineWaterCompany sjw:FirstMortgageBonds us-gaap:PublicUtilityBonds0.00.0

sjw:MaineWaterCompany, sjw:StateRevolvingFundLoans, us-gaap:PublicUtilityBonds


Long
Period End2020-12-312019-12-312018-12-31
Value18160.0
Percentage of LongTermDebt1.41.20.0
Percentage of Assets0.60.50.0
Percentage of Assets sjw:MaineWaterCompany sjw:StateRevolvingFundLoans us-gaap:PublicUtilityBonds0.00.00.0

sjw:MaineWaterCompany, sjw:StateRevolvingFundLoansSeriesT, us-gaap:PublicUtilityBonds


Long
Period End2020-12-23
Value4.0
Percentage of LongTermDebt0.0
Percentage of Assets0.0
Percentage of Assets sjw:MaineWaterCompany sjw:StateRevolvingFundLoansSeriesT us-gaap:PublicUtilityBonds0.0

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

sjw:ConnecticutWaterCompany, us-gaap:NotesPayableToBanks


Long
Period End2020-12-312019-12-312018-12-31
Value1111190.0
Percentage of LongTermDebt8.29.20.0
Percentage of Assets3.43.80.0
Percentage of Assets sjw:ConnecticutWaterCompany us-gaap:NotesPayableToBanks0.00.00.0

sjw:ConnecticutWaterCompany, us-gaap:SeniorNotes


Long
Period End2020-12-312019-12-312018-12-31
Value70350.0
Percentage of LongTermDebt5.22.70.0
Percentage of Assets2.11.10.0
Percentage of Assets sjw:ConnecticutWaterCompany us-gaap:SeniorNotes0.00.00.0

sjw:ConnecticutWaterServiceInc., us-gaap:NotesPayableToBanks


Long
Period End2020-12-312019-12-312018-12-31
Value22230.0
Percentage of LongTermDebt1.61.90.0
Percentage of Assets0.70.80.0
Percentage of Assets sjw:ConnecticutWaterServiceInc. us-gaap:NotesPayableToBanks0.00.00.0

sjw:MaineWaterCompany, us-gaap:NotesPayableToBanks


Long
Period End2020-12-312019-12-312018-12-31
Value17170.0
Percentage of LongTermDebt1.31.40.0
Percentage of Assets0.50.60.0
Percentage of Assets sjw:MaineWaterCompany us-gaap:NotesPayableToBanks0.00.00.0

sjw:SanJoseWaterCompany, us-gaap:SeniorNotes


Long
Period End2020-12-312019-12-312018-12-31
Value320330250
Percentage of LongTermDebt23.725.557.5
Percentage of Assets9.710.512.8
Percentage of Assets sjw:SanJoseWaterCompany us-gaap:SeniorNotes0.00.00.0

srt:ParentCompany, us-gaap:SeniorNotes


Long
Period End2020-12-312019-12-312018-12-31
Value61056050
Percentage of LongTermDebt45.143.311.5
Percentage of Assets18.417.92.6
Percentage of Assets srt:ParentCompany us-gaap:SeniorNotes0.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1372130312871307131513161283511510510431431431431431431430433433364364365380380384384384384334334334335335335335335335343343344344295
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.239.138.940.141.041.541.025.325.526.122.128.128.729.529.628.529.330.230.025.026.027.028.428.829.630.130.331.829.229.830.229.129.730.530.931.231.833.033.134.034.531.6

us-gaap:LongTermDebtNoncurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Long
Period End2020-12-312019-12-31
Value555555
Percentage of LongTermDebtNoncurrent43.243.3
Percentage of Assets16.817.7
Percentage of Assets srt:ParentCompany35.837.5

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value191189191186195194195
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.65.75.85.76.16.16.2

us-gaap:DeferredIncomeTaxLiabilitiesNet us-gaap:ConsolidatedEntities

srt:ParentCompany


Deferred
Period End2020-12-312019-12-31
Value2.6231.994
Percentage of DeferredIncomeTaxLiabilitiesNet1.41.0
Percentage of Assets0.10.1
Percentage of Assets srt:ParentCompany0.20.1

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1251241211071131111087372727075757472737272707373727076767674444445437776757372717068525150
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.73.73.73.33.63.53.43.63.63.73.64.95.05.15.04.95.05.04.95.05.25.35.25.85.96.05.83.73.94.03.96.86.86.96.86.86.86.76.65.25.25.4

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1615111111
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent13.314.116.415.315.7
Percentage of Assets0.50.50.60.80.8
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit0.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value10592586159
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent86.585.983.684.884.3
Percentage of Assets3.23.03.04.24.1
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value242321252223221212121313121313121212131111109.9618.9435.9785.8835.9545.545.4335.415.4966.5877.9647.987.8727.677.5147.4297.0416.0676.1766.042
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.70.80.70.80.70.60.60.60.70.90.90.90.90.90.90.90.90.80.80.80.70.70.50.50.50.50.50.50.50.60.70.70.70.70.70.70.70.60.60.6

us-gaap:OtherLiabilitiesNoncurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-31
Value0.6431.062
Percentage of OtherLiabilitiesNoncurrent3.04.8
Percentage of Assets0.00.0
Percentage of Assets srt:ParentCompany0.00.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value989978917913895883889896893888889474465457463452436421421411396384383371364361360356321319321319313273274271264262264260255255252254
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.029.427.728.027.927.828.444.344.645.345.530.931.031.331.829.929.629.329.228.328.328.328.628.028.128.328.429.528.028.428.927.827.724.925.325.325.125.225.425.725.527.30.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-31
Value917889
Percentage of StockholdersEquity100.0100.0
Percentage of Assets27.728.4
Percentage of Assets srt:ParentCompany59.160.1

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-0.919-1.026-1.0640.0780.001-0.0090.1260.00.00.00.00.00.00.02.2031.5242.3112.5173.3872.312.2742.3591319
Percentage of StockholdersEquity-0.1-0.1-0.10.00.0-0.00.00.00.00.00.00.00.00.00.50.40.60.71.10.80.90.95.27.6
Percentage of Assets-0.0-0.0-0.00.00.0-0.00.00.00.00.00.00.00.00.00.20.10.20.20.30.20.20.30.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value57957851050950850750649949749649584848384816866632624232220
Percentage of StockholdersEquity58.559.155.655.756.857.456.955.755.755.955.717.718.118.318.319.417.918.419.69.59.39.28.78.1
Percentage of Assets17.017.415.415.615.816.016.224.724.825.425.35.55.65.75.85.75.15.25.72.42.42.50.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value0.030.030.0290.0290.0290.0280.0280.0280.0280.0280.0280.0210.0210.0210.0210.0211010109.7249.6849.6629.6359.611
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.02.82.93.33.53.73.83.83.8
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.80.80.90.90.91.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value411400408403387376383397396391393390380373376338302280244236227219207204
Percentage of StockholdersEquity41.641.044.544.243.242.643.144.344.344.144.382.381.981.781.280.378.778.076.186.186.286.182.280.5
Percentage of Assets12.112.012.312.412.111.912.219.619.820.020.125.425.425.525.823.422.522.122.021.721.923.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.030.030.0290.0290.0290.0280.0280.0280.0280.0280.0280.0210.0210.0210.0210.0210.0210.0210.02110101010101010101010101010109.7399.7249.7159.7079.6989.6849.6839.6769.662
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.70.80.80.80.80.80.80.80.90.90.90.90.90.90.90.90.90.90.90.91.01.01.0

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Common
Period End2020-12-312019-12-31
Value0.0290.028
Percentage of CommonStockValue100.0100.0
Percentage of Assets0.00.0
Percentage of Assets srt:ParentCompany0.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value57957851050950850750649949749649584848384838282817069696868676666646463636262262625252424242323
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.017.415.415.615.816.016.224.724.825.425.35.55.65.75.85.55.65.75.74.95.05.15.15.25.25.25.25.45.65.75.75.55.52.42.42.42.42.42.42.42.42.5

us-gaap:AdditionalPaidInCapitalCommonStock us-gaap:ConsolidatedEntities

srt:ParentCompany


Additional
Period End2020-12-312019-12-31
Value510506
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0
Percentage of Assets15.416.2
Percentage of Assets srt:ParentCompany32.934.2

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value411400408403387376383397396391393390380373376366351337338328314301302290284281280278244241244243238234236233227225227224219219
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.112.012.312.412.111.912.219.619.820.020.125.425.425.525.824.323.923.523.422.622.422.222.521.922.022.022.123.021.321.522.021.221.121.321.721.721.521.621.922.121.923.5

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:ConsolidatedEntities

srt:ParentCompany


Retained
Period End2020-12-312019-12-31
Value408383
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0
Percentage of Assets12.312.2
Percentage of Assets srt:ParentCompany26.325.9

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-919000.0-1026000.0-1064000.078000.01000.0-9000.0126000.000002203000.01776000.01696000.01640000.01524000.01418000.01586000.02841000.02311000.02135000.02247000.02502000.02517000.02184000.02454000.03585000.03387000.02759000.02574000.02664000.02310000.02362000.02322000.02263000.02274000.02149000.02376000.02359000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.0-0.0-0.00.00.0-0.00.00.00.00.00.00.20.10.10.10.10.10.10.20.20.20.20.20.20.20.20.30.30.20.20.20.20.20.20.20.20.20.20.3

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities

srt:ParentCompany


Accumulated
Period End2020-12-312019-12-31
Value-1064000.0126000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0
Percentage of Assets-0.00.0
Percentage of Assets srt:ParentCompany-0.10.0

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-06-302021-03-312019-03-31
Value-0.1266-0.01
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0
Percentage of Assets0.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312019-03-31
Value-0.1266-0.01
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0
Percentage of Assets0.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.0

us-gaap:CommonStock


Stock
Period End2021-03-31
Value0.001
Percentage of StockIssuedDuringPeriodValueNewIssues0.0
Percentage of Assets0.0
Percentage of Assets us-gaap:CommonStock0.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value763000.01248000.01016000.0966000.0208000.0936000.0702000.0870000.0486000.0362000.0457000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value791000.01280000.01058000.01009000.0251000.0952000.0718000.0886000.0504000.0392000.0487000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue103.7102.6104.1104.5120.7101.7102.3101.8103.7108.3106.6
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-28000.0-32000.0-42000.0-43000.0-43000.0-16000.0-16000.0-16000.0-18000.0-30000.0-30000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue-3.7-2.6-4.1-4.5-20.7-1.7-2.3-1.8-3.7-8.3-6.6
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value33333338247.929384124251728222213302828372122322427172720209.058151620121416251614151918113.99511
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.929.724.822.917.27.529.031.723.631.918.623.623.229.814.324.630.041.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-55.065-51.94-73.049-60.112-38.629-42.469-902.995-42.245-38.158-34.373-40.886-38.579-35.815-31.563-18.418-42.47-22.035-30.951-35.456-22.922-29.265-34.486-36.302-26.638-26.202-21.468-25.235-25.723-18.863-27.819-29.24-28.854-23.27-14.406-34.985-24.65-24.708-19.854-23.203-18.896-18.838-14.782-3.073-28.715
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-37.4-46.3-54.1-36.0-27.2-40.4-675.3-32.3-36.6-43.6-43.0-32.1-36.4-41.6-20.1-33.8-23.0-45.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value342328189.262444573.578158.12143014148.1365.5039.835-4.586-15.5415.56.512105.852100.3458.172-2.6812.0254.4171212127.89512-0.40213-3.642-2.178-2.386-8.319-2.717433.87-2.52717
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.721.221.211.26.542.7342.12.715.110.3453.412.215.210.76.07.8-4.8-22.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value135.241-10.942-3.106-4.95610-406.7582.8532.186-1.059
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.24.7-8.1-1.9-3.59.8-304.22.22.1-1.3

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1.665-0.7620.861-5.381-0.633-0.3445.965-4.275-1.925-1.014-4.041-3.316-0.746-1.383-1.719-0.003-0.3091.595-11.9526.7069.050.999112.5351.710.467.579180.2910.1131.3566.0114.10.13.5035.2772.8410.6145.0377.430.7183.2737.1460.317
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value24232223232221151515141414141212121211111111101010109.8569.8639.8919.8819.0859.1729.1389.28.5948.6678.6778.6918.1888.188.1658.176
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value4272000.0-3719000.03520000.05135000.0-257000.0-8755000.0-2220000.03336000.0374000.0456000.0-1363000.02079000.0630000.0784000.0673000.01490000.0168000.0557000.03159000.0-2484000.0692000.0-1704000.0504000.0954000.0-75000.0167000.0-1496000.0558000.01507000.0-1018000.01927000.0-4214000.02172000.094000.0-99000.0711000.0722000.0-401000.0-161000.0-856000.01811000.0-927000.0472000.0-276000.0
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value492000.0-515000.01395000.0-226000.02754000.0-1510000.0-9727000.01260000.0-4694000.05692000.0-4413000.0611000.051000.02054000.0-2355000.01642000.0-1410000.01296000.0-1373000.01570000.0-779000.0227000.0-474000.0340000.0-3000.02117000.0-2276000.0136000.0833000.0191000.0-1215000.01227000.01205000.0-106000.0-562000.0872000.0182000.0-1067000.0-140000.0868000.011000.0-367000.0592000.0-581000.0
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value33333338247.929384124251728222213302828372122322427172720209.058151620121416251614151918113.99511
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.929.724.822.917.27.529.031.723.631.918.623.623.229.814.324.630.041.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value202.6161326192.417-5.4869.478135.8738.82315121.2851719183.6711318163.378169.5347.4614.6955.688386.8460.9064.6778.957.441.3175.924105.2011.1096.6028.2155.4510.618.118104.516
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.12.39.815.613.92.3-4.17.213.07.49.313.213.11.718.915.519.55.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RegulatedOperation, sjw:ReportableSegmentOne


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value205.6991625225.8281110136.11122153.9497.78419153.571169.6987.5564.7016.211375.5910.9034.8739.1147.6861.66.3619.6325.3641.4547.0528.5095.549
Percentage of NetIncomeLoss99.1217.9121.496.0112.8241.1-218.1115.7100.9103.9125.0141.5116.7107.656.7101.489.6105.7101.6101.7101.3100.1109.298.881.799.7104.2101.8103.3121.5107.495.5103.1131.1106.8103.6101.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.05.112.015.015.65.58.98.413.17.711.618.615.35.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RegulatedOperation, us-gaap:Corporate


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value205.6991625225.8281110136.11122153.9497.78419153.571169.6987.5564.7016.211375.5910.9034.8739.1147.6861.66.3619.6325.3641.4547.0528.5095.549
Percentage of NetIncomeLoss99.1217.9121.496.0112.8241.1-218.1115.7100.9103.9125.0141.5116.7107.656.7101.489.6105.7101.6101.7101.3100.1109.298.881.799.7104.2101.8103.3121.5107.495.5103.1131.1106.8103.6101.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.05.112.015.015.65.58.98.413.17.711.618.615.35.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RegulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentOne


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.6770.7220.9210.8270.8811.470.8920.5550.3360.2360.4590.5610.4970.1720.3050.330.2140.1050.638-0.0290.0550.2180.3170.0680.1320.1510.0830.1090.108-0.5080.1140.3260.1070.160.1030.3120.251
Percentage of NetIncomeLoss3.327.66.93.24.560.8-16.35.92.54.05.23.63.94.72.21.71.33.13.9-0.30.74.65.60.21.916.71.81.21.5-38.61.93.22.114.41.63.84.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.60.70.50.61.40.70.40.30.30.50.50.50.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentOne0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, sjw:ReportableSegmentTwo


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.2960.3230.3140.310.4430.3880.3390.3040.6620.318-0.1260.3590.2960.366.7360.2390.1780.2530.1850.2360.2720.26-0.3290.7950.380.2040.1190.1320.0330.636-0.1620.492-0.051-0.035-0.06-0.08-0.147
Percentage of NetIncomeLoss1.412.32.41.22.216.1-6.23.24.95.4-1.42.32.39.849.11.31.17.51.12.53.65.5-5.82.15.622.52.51.50.448.3-2.74.9-1.0-3.2-0.9-1.0-2.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.30.20.20.30.40.30.20.60.4-0.10.30.30.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation sjw:ReportableSegmentTwo0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:AllOtherSegments


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-0.783-4.128-4.079-0.097-3.839-5.269-18.682-2.345-1.122-0.781-2.541-7.465-2.944-0.81-1.098-0.8261.36-0.551-1.078-0.371-0.422-0.484-0.511-0.4040.743-0.352-0.398-0.405-0.387-0.411-0.389-0.366-0.219-0.47-0.493-0.526-0.202
Percentage of NetIncomeLoss-3.8-157.8-30.7-0.4-19.5-218.0340.5-24.7-8.3-13.3-28.8-47.3-22.9-22.1-8.0-4.48.1-16.3-6.7-3.9-5.7-10.3-9.0-1.110.9-38.9-8.5-4.5-5.2-31.2-6.6-3.6-4.2-42.4-7.5-6.4-3.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-3.7-3.0-0.1-2.7-5.0-14.0-1.8-1.1-1.0-2.7-6.2-3.0-1.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:AllOtherSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:Corporate


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.19-3.083-2.8441.04-2.515-3.411-17.451-1.486-0.124-0.227-2.208-6.545-2.151-0.2785.943-0.2571.752-0.193-0.255-0.164-0.095-0.006-0.5230.4591.2550.003-0.196-0.164-0.246-0.283-0.4370.452-0.163-0.345-0.45-0.294-0.098
Percentage of NetIncomeLoss0.9-117.9-21.44.0-12.8-141.1318.1-15.7-0.9-3.9-25.0-41.5-16.7-7.643.3-1.410.4-5.7-1.6-1.7-1.3-0.1-9.21.218.30.3-4.2-1.8-3.3-21.5-7.44.5-3.1-31.1-6.8-3.6-1.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-2.7-2.10.6-1.8-3.2-13.1-1.1-0.1-0.3-2.3-5.5-2.2-0.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnregulatedOperation us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value202.616192.417
Percentage of NetIncomeLoss100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.12.313.92.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1326192.417-5.4869.478135.8738.82315121.2851719203.671131816
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.815.613.92.3-4.17.213.27.49.313.213.11.718.915.521.55.40.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value26192.4179.478135.87315121.285
Percentage of ProfitLoss100.0100.0100.0100.098.4100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.613.92.37.213.07.413.213.11.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value791000.01280000.01235000.01058000.01009000.0251000.0850000.0952000.0718000.0886000.0734000.0504000.0392000.0487000.01010000.0589000.0458000.0586000.0375000.0464000.0379000.0473000.0395000.0447000.0362000.0399000.0257000.0323000.0207000.0244000.0126000.0197000.0242000.0347000.0113000.0168000.0100000.0183000.0138000.0185000.0126000.0202000.0180000.0209000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-55.065-51.94-73.049-60.112-38.629-42.469-902.995-42.245-38.158-34.373-40.886-38.579-35.815-31.563-18.418-42.47-22.035-30.951-35.456-22.922-29.265-34.486-36.302-26.638-26.202-21.468-25.235-25.723-18.863-27.819-29.24-28.854-23.27-14.406-34.985-24.65-24.708-19.854-23.203-18.896-18.838-14.782-3.073-28.715
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-37.4-46.3-54.1-36.0-27.2-40.4-675.3-32.3-36.6-43.6-43.0-32.1-36.4-41.6-20.1-33.8-23.0-45.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Real Estate

us-gaap:PaymentsToAcquireRealEstate

us-gaap:PaymentsToAcquireRealEstate


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value78000.0152000.044000.067000.069000.0255000.000137000.0000123000.000-3000.057000.062000.074000.06000.0248000.00527000.0471000.040000.059000.04000.09000.00055000.0724000.02259000.01194000.0628000.02000.048000.00-9000.053000.093000.019000.01254000.03286000.0
Percentage of PaymentsToAcquireRealEstate100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value342328189.262444573.578158.12143014148.1365.5039.835-4.586-15.5415.56.512105.852100.3458.172-2.6812.0254.4171212127.89512-0.40213-3.642-2.178-2.386-8.319-2.717433.87-2.52717
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.721.221.211.26.542.7342.12.715.110.3453.412.215.210.76.07.8-4.8-22.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312014-12-312013-12-312012-12-312012-09-302011-12-312011-09-302010-12-312010-09-30
Value70170.0500.0355100.00.0800.00.00.00.00.00.00.00.00.00.00.00.14827
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.00.0100.00.0100.0100.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value501.159197.8830.5351.1710.00.00.00.00.00.00.00.02.6850.032110.2584.7330.1520.1980.1210.1670.1470.1890.1150.160.1380.1810.1080.1754.9750.1993.0370.2190.2410.1690.1890.1930.5430.2130.186
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

sjw:SanJoseWaterCompany, sjw:SeriesC, us-gaap:SeniorNotes


Repayments
Period End2020-11-02
Value10.0
Percentage of RepaymentsOfLongTermDebt0.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

sjw:ConnecticutWaterCompany, us-gaap:NotesPayableToBanks


Repayments
Period End2020-12-15
Value8.0
Percentage of RepaymentsOfLongTermDebt0.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value109.7249.1389.1319.1229.1188.5388.5368.5318.5295.7775.7775.7665.7547.9524.4644.464.4564.144.1454.1394.1353.9753.9743.973.9663.8043.7943.7913.7883.6793.6783.6743.4123.3113.313.3053.3053.2073.2073.2043.2053.1523.152
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value109.7249.1319.1229.1188.5378.5328.5285.7775.7665.754
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Dividends us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividendsus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value109.7249.1319.1229.1188.5378.5328.5285.7775.7665.754
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

sjw:ConnecticutWaterCompany, sjw:ConnecticutInnovationsRevenueBonds, us-gaap:PublicUtilityBonds


Debt
Period End2020-12-312019-12-31
Value5.00.05
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:ConnecticutWaterCompany sjw:ConnecticutInnovationsRevenueBonds us-gaap:PublicUtilityBonds0.00.0

sjw:MaineWaterCompany, sjw:FirstMortgageBonds, us-gaap:PublicUtilityBonds


Debt
Period End2020-12-312019-12-31
Value8.950.0895
Percentage of DebtInstrumentInterestRateStatedPercentage179.0179.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:MaineWaterCompany sjw:FirstMortgageBonds us-gaap:PublicUtilityBonds0.00.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

sjw:AvonWaterCompany, us-gaap:Mortgages


Debt
Period End2020-12-312019-12-31
Value3.050.0305
Percentage of DebtInstrumentInterestRateStatedPercentage61.061.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:AvonWaterCompany us-gaap:Mortgages0.00.0

sjw:HeritageValleyWaterCompany, us-gaap:NotesPayableToBanks


Debt
Period End2020-12-312019-12-31
Value4.750.0475
Percentage of DebtInstrumentInterestRateStatedPercentage95.095.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:HeritageValleyWaterCompany us-gaap:NotesPayableToBanks0.00.0

sjw:SJWTXInc., us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-31
Value6.270.0627
Percentage of DebtInstrumentInterestRateStatedPercentage125.4125.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:SJWTXInc. us-gaap:SeniorNotes0.00.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities, us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

sjw:MaineWaterCompany, srt:Maximum, sjw:StateRevolvingFundLoans, us-gaap:PublicUtilityBonds


Debt
Period End2020-12-312019-12-31
Value2.580.0258
Percentage of DebtInstrumentInterestRateStatedPercentage51.651.6
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:MaineWaterCompany srt:Maximum sjw:StateRevolvingFundLoans us-gaap:PublicUtilityBonds0.00.0

sjw:SanJoseWaterCompany, srt:Maximum, sjw:CaliforniaPollutionControlFinancingAuthorityRevenueBondsTotal, us-gaap:PublicUtilityBonds


Debt
Period End2020-12-312019-12-31
Value5.10.051
Percentage of DebtInstrumentInterestRateStatedPercentage102.0102.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:SanJoseWaterCompany srt:Maximum sjw:CaliforniaPollutionControlFinancingAuthorityRevenueBondsTotal us-gaap:PublicUtilityBonds0.00.0

sjw:SanJoseWaterCompany, srt:Minimum, sjw:CaliforniaPollutionControlFinancingAuthorityRevenueBondsTotal, us-gaap:PublicUtilityBonds


Debt
Period End2020-12-312019-12-31
Value4.750.0475
Percentage of DebtInstrumentInterestRateStatedPercentage95.095.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:SanJoseWaterCompany srt:Minimum sjw:CaliforniaPollutionControlFinancingAuthorityRevenueBondsTotal us-gaap:PublicUtilityBonds0.00.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities, us-gaap:Range, us-gaap:LongtermDebtType

sjw:ConnecticutWaterCompany, srt:Maximum, us-gaap:NotesPayableToBanks


Debt
Period End2020-12-312019-12-31
Value4.750.0475
Percentage of DebtInstrumentInterestRateStatedPercentage95.095.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:ConnecticutWaterCompany srt:Maximum us-gaap:NotesPayableToBanks0.00.0

sjw:ConnecticutWaterCompany, srt:Maximum, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value3.53
Percentage of DebtInstrumentInterestRateStatedPercentage70.6
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:ConnecticutWaterCompany srt:Maximum us-gaap:SeniorNotes0.0

sjw:ConnecticutWaterCompany, srt:Minimum, us-gaap:NotesPayableToBanks


Debt
Period End2020-12-312019-12-31
Value3.510.0316
Percentage of DebtInstrumentInterestRateStatedPercentage70.263.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:ConnecticutWaterCompany srt:Minimum us-gaap:NotesPayableToBanks0.00.0

sjw:ConnecticutWaterCompany, srt:Minimum, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value3.51
Percentage of DebtInstrumentInterestRateStatedPercentage70.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:ConnecticutWaterCompany srt:Minimum us-gaap:SeniorNotes0.0

sjw:ConnecticutWaterServiceInc., srt:Maximum, us-gaap:NotesPayableToBanks


Debt
Period End2020-12-312019-12-31
Value4.150.0415
Percentage of DebtInstrumentInterestRateStatedPercentage83.083.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:ConnecticutWaterServiceInc. srt:Maximum us-gaap:NotesPayableToBanks0.00.0

sjw:ConnecticutWaterServiceInc., srt:Minimum, us-gaap:NotesPayableToBanks


Debt
Period End2020-12-312019-12-31
Value4.090.0409
Percentage of DebtInstrumentInterestRateStatedPercentage81.881.8
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:ConnecticutWaterServiceInc. srt:Minimum us-gaap:NotesPayableToBanks0.00.0

sjw:MaineWaterCompany, srt:Maximum, us-gaap:NotesPayableToBanks


Debt
Period End2020-12-312019-12-31
Value5.510.0551
Percentage of DebtInstrumentInterestRateStatedPercentage110.2110.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:MaineWaterCompany srt:Maximum us-gaap:NotesPayableToBanks0.00.0

sjw:MaineWaterCompany, srt:Minimum, us-gaap:NotesPayableToBanks


Debt
Period End2020-12-312019-12-31
Value4.180.0418
Percentage of DebtInstrumentInterestRateStatedPercentage83.683.6
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:MaineWaterCompany srt:Minimum us-gaap:NotesPayableToBanks0.00.0

sjw:SanJoseWaterCompany, srt:Maximum, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-31
Value8.580.0945
Percentage of DebtInstrumentInterestRateStatedPercentage171.6189.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:SanJoseWaterCompany srt:Maximum us-gaap:SeniorNotes0.00.0

sjw:SanJoseWaterCompany, srt:Minimum, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-31
Value4.290.0429
Percentage of DebtInstrumentInterestRateStatedPercentage85.885.8
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations sjw:SanJoseWaterCompany srt:Minimum us-gaap:SeniorNotes0.00.0

srt:ParentCompany, srt:Maximum, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-31
Value4.350.0435
Percentage of DebtInstrumentInterestRateStatedPercentage87.087.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:ParentCompany srt:Maximum us-gaap:SeniorNotes0.00.0

srt:ParentCompany, srt:Minimum, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value2.47
Percentage of DebtInstrumentInterestRateStatedPercentage49.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:ParentCompany srt:Minimum us-gaap:SeniorNotes0.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value14.0-52.015.018.015.021.0
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-31
Value191195
Percentage of DeferredTaxLiabilities100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-31
Value786660
Percentage of DeferredTaxAssetsNet100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6882000.06511000.06468000.06594000.03834000.01382000.01307000.01132000.0755000.0649000.0535000.02316000.01978000.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:AlternativeRevenueProgramsNet

sjw:AlternativeRevenueProgramsNet


Alternative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.6560.112-5.371.3243.0490.504-4.014-11.912-0.327-1.9792.6624.1933.933-0.3321.3361.3337.6392.276
Percentage of AlternativeRevenueProgramsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:AuthorizedRegulatoryBaseChargePerResidentialAccount dei:LegalEntity

sjw:AuthorizedRegulatoryBaseChargePerResidentialAccount

sjw:CanyonLakeWaterServiceCompany


Authorized
Period End2021-02-25
Value0.51
Percentage of AuthorizedRegulatoryBaseChargePerResidentialAccount100.0

sjw:SJWTXInc.


Authorized
Period End2021-02-252019-10-01
Value0.513.04
Percentage of AuthorizedRegulatoryBaseChargePerResidentialAccount100.00.0

sjw:AuthorizedRegulatorySurchargePerThousandGallons dei:LegalEntity

sjw:AuthorizedRegulatorySurchargePerThousandGallons

sjw:CanyonLakeWaterServiceCompany


Authorized
Period End2021-03-012021-02-252021-01-292020-12-01
Value0.71.840.952.02
Percentage of AuthorizedRegulatorySurchargePerThousandGallons100.0100.0100.0100.0

sjw:SJWTXInc.


Authorized
Period End2021-03-012021-02-252021-01-292020-12-012019-10-012019-09-302019-02-012019-01-282018-07-312018-01-01
Value0.71.840.952.022.022.191.051.131.131.15
Percentage of AuthorizedRegulatorySurchargePerThousandGallons100.0100.0100.0100.00.00.00.00.00.00.0

sjw:BalancingandMemorandumAccountIncreaseDecrease

sjw:BalancingandMemorandumAccountIncreaseDecrease


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.2732.7544.2321.1012.5672.941.552-8.0252.3970.0531.6636.2180.943-2.3521.0516.55104.335
Percentage of BalancingandMemorandumAccountIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:BalancingandMemorandumAccountRefundsCollections

sjw:BalancingandMemorandumAccountRefundsCollections


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-0.093-0.08-0.1042.6190.06.825-7.877-8.544-5.696-2.990.0030.0040.0080.002-0.572-9.085-5.3036.25313199.4756.371163.9423.6463.0592.50.1260.00.00.00.0
Percentage of BalancingandMemorandumAccountRefundsCollections100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

sjw:BalancingandMemorandumCostRecoveryAccountIncreaseDecrease

sjw:BalancingandMemorandumCostRecoveryAccountIncreaseDecrease


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value1703000.01153000.04015000.02188000.0938000.01183000.01126000.01250000.0-856000.0-558000.0-913000.02527000.01351000.0-321000.0000
Percentage of BalancingandMemorandumCostRecoveryAccountIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

sjw:BalancingandMemorandumCostRecoveryAccountIncreaseDecrease us-gaap:RegulatoryAsset

sjw:CEMA


Balancingand
Period End2021-06-30
Value352000.0
Percentage of BalancingandMemorandumCostRecoveryAccountIncreaseDecrease20.7

sjw:OtherRegulatoryAssets


Balancingand
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1000.01000.001000.01000.02000.02000.03000.03000.01090000.0000
Percentage of BalancingandMemorandumCostRecoveryAccountIncreaseDecrease0.10.00.00.10.10.20.2-0.4-0.5-119.40.00.0-0.0

sjw:PRVMA


Balancingand
Period End2020-12-312020-09-30
Value01219000.0
Percentage of BalancingandMemorandumCostRecoveryAccountIncreaseDecrease0.055.7

sjw:PensionBalancingAccount


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value366000.0366000.0747000.0-253000.099000.0415000.0163000.0199000.0199000.0184000.0132000.0161000.0161000.0161000.0000
Percentage of BalancingandMemorandumCostRecoveryAccountIncreaseDecrease21.531.718.6-11.610.635.114.515.9-23.2-33.0-14.56.411.9-50.20.00.00.0

sjw:WaterSupplyBalancingAccounts


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value984000.0787000.01001000.01222000.0838000.0767000.0961000.01049000.0-1058000.0-745000.0-2135000.02366000.01190000.0-482000.0000
Percentage of BalancingandMemorandumCostRecoveryAccountIncreaseDecrease57.868.324.955.989.364.885.383.9123.6133.5233.893.688.1150.20.00.00.0

sjw:BalancingandMemorandumCostRecoveryAccountRefundsCollections

sjw:BalancingandMemorandumCostRecoveryAccountRefundsCollections


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-0.098-0.081-0.104-0.0070.0-0.016-0.816-0.886-0.59-0.3110.00.00.00.00.00.00.0
Percentage of BalancingandMemorandumCostRecoveryAccountRefundsCollections100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0

sjw:BalancingandMemorandumCostRecoveryAccountRefundsCollections us-gaap:RegulatoryAsset

sjw:OtherRegulatoryAssets


Balancingand
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.00.0-0.004-0.205-0.223-0.148-0.0780.00.00.00.0
Percentage of BalancingandMemorandumCostRecoveryAccountRefundsCollections-0.0-0.00.025.025.125.225.125.10.00.00.00.0

sjw:PRVMA


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-30
Value-0.099-0.081-0.103-0.008
Percentage of BalancingandMemorandumCostRecoveryAccountRefundsCollections101.0100.099.0114.3

sjw:PensionBalancingAccount


Balancingand
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-0.0010.00.00.0221.1121.2080.8050.4220.0010.00.00.00.00.00.0
Percentage of BalancingandMemorandumCostRecoveryAccountRefundsCollections1.0-0.00.0-137.5-136.3-136.3-136.4-135.70.00.00.00.00.00.00.0

sjw:WaterSupplyBalancingAccounts


Balancingand
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.0010.00.0010.0-0.034-1.723-1.871-1.247-0.655-0.0010.00.00.00.00.00.0
Percentage of BalancingandMemorandumCostRecoveryAccountRefundsCollections-1.0-0.0-14.30.0212.5211.2211.2211.4210.60.00.00.00.00.00.00.0

sjw:BalancingandMemorandumRevenueAccountIncreaseDecrease

sjw:BalancingandMemorandumRevenueAccountIncreaseDecrease


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value1.571.6010.217-1.0871.6291.7570.426-9.2753.2530.6112.5763.691-0.408-2.0316.55104.335
Percentage of BalancingandMemorandumRevenueAccountIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:BalancingandMemorandumRevenueAccountIncreaseDecrease us-gaap:RegulatoryAsset

sjw:Costofcapital


Balancingand
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.0010.0-0.001-0.002-0.005-0.006-0.007-0.008-0.009-0.008-0.008-0.198-1.1650.00.00.00.0
Percentage of BalancingandMemorandumRevenueAccountIncreaseDecrease-0.10.00.1-0.1-0.3-1.40.1-0.2-1.5-0.3-0.248.557.40.00.00.00.0

sjw:MontereyWRAM


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1.4241.7760.027-1.1241.5911.970.5880.3282.109
Percentage of BalancingandMemorandumRevenueAccountIncreaseDecrease90.7110.912.4103.497.7112.1138.0-3.564.8

sjw:OtherRegulatoryAssets


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.147-0.1750.190.0370.041.7650.4560.2812.0311.7070.471-0.0340.4220.40.1510.050.4260.457
Percentage of BalancingandMemorandumRevenueAccountIncreaseDecrease9.4-10.987.6-3.42.5100.5107.0-3.062.4279.418.3-0.9-103.4-19.70.00.84.210.5

sjw:Taxmemorandum


Balancingand
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.00.0010.0-0.003-0.025-0.033-0.04-0.041-0.549-0.459-4.563-0.9330.00.00.0
Percentage of BalancingandMemorandumRevenueAccountIncreaseDecrease0.0-0.10.0-0.2-5.90.4-1.2-6.7-21.3-12.41118.445.90.00.00.0

sjw:BalancingandMemorandumRevenueAccountRefundsCollections

sjw:BalancingandMemorandumRevenueAccountRefundsCollections


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value5000.01000.002626000.006841000.0-7061000.0-7658000.0-5106000.0-2679000.03000.04000.08000.02000.0-9085000.0-5303000.0-6253000.0
Percentage of BalancingandMemorandumRevenueAccountRefundsCollections100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:BalancingandMemorandumRevenueAccountRefundsCollections us-gaap:RegulatoryAsset

sjw:A2012GeneralRateCaseTrueup


Balancingand
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1000.000-3348000.0-3631000.0-2421000.0-1271000.03000.02000.04000.01000.0-323000.0-4123000.0-2659000.0-2258000.0
Percentage of BalancingandMemorandumRevenueAccountRefundsCollections100.00.00.047.447.447.447.4100.050.050.050.00.045.450.136.1

sjw:A20142017WCMA


Balancingand
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value01000.00-43000.0-2210000.0-2397000.0-1597000.0-838000.001000.02000.01000.0
Percentage of BalancingandMemorandumRevenueAccountRefundsCollections0.00.00.0-0.631.331.331.331.30.025.025.050.0

sjw:MontereyWRAM


Balancingand
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1000.002625000.00-27000.0-1385000.0-1502000.0-1001000.0
Percentage of BalancingandMemorandumRevenueAccountRefundsCollections20.00.0100.00.0-0.419.619.619.6

sjw:OtherRegulatoryAssets


Balancingand
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4000.0000-94000.0-1503000.0-1630000.0-1088000.0-570000.000001000.00-408000.0-451000.0
Percentage of BalancingandMemorandumRevenueAccountRefundsCollections80.00.00.00.0-1.421.321.321.321.30.00.00.00.00.0-0.07.77.2

sjw:Taxmemorandum


Balancingand
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0006978000.000000000000
Percentage of BalancingandMemorandumRevenueAccountRefundsCollections0.00.00.0102.0-0.0-0.0-0.0-0.00.00.00.00.0-0.0-0.0-0.0

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets us-gaap:BusinessAcquisition

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets

sjw:CTWS


Business
Period End2020-12-31
Value1451000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets100.0

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentAssets us-gaap:BusinessAcquisition

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentAssets

sjw:CTWS


Business
Period End2020-12-31
Value382000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentAssets100.0

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilities us-gaap:BusinessAcquisition

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilities

sjw:CTWS


Business
Period End2020-12-31
Value0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilities0.0

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxes us-gaap:BusinessAcquisition

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxes

sjw:CTWS


Business
Period End2020-12-31
Value1734000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxes100.0

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities us-gaap:BusinessAcquisition

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities

sjw:CTWS


Business
Period End2020-12-31
Value1451000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities100.0

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncurrentLiabilities us-gaap:BusinessAcquisition

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncurrentLiabilities

sjw:CTWS


Business
Period End2020-12-31
Value-283000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncurrentLiabilities100.0

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRegulatoryAssetsandDeferredChargesNet us-gaap:BusinessAcquisition

sjw:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRegulatoryAssetsandDeferredChargesNet

sjw:CTWS


Business
Period End2020-12-31
Value-39000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRegulatoryAssetsandDeferredChargesNet100.0

sjw:DefinedBenefitPlanRateOfCompensationIncrease us-gaap:TitleOfIndividual

sjw:DefinedBenefitPlanRateOfCompensationIncrease

sjw:CTWSEmployees


Defined
Period End2021-06-302021-03-31
Value01.5
Percentage of DefinedBenefitPlanRateOfCompensationIncrease0.0100.0

sjw:GroundwaterExtractionCharges

sjw:GroundwaterExtractionCharges


Groundwater
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value20151720181514139.16.86312149.9199.5321315107.416.461108.3126.4489.1877.926.1977.9361117159.44810139.5254.596.8838.6725.4392.9463.3657.8245.34.5086.6458.7366.238
Percentage of GroundwaterExtractionCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:IncreaseDecreaseInUpFrontServiceConcessionPayment

sjw:IncreaseDecreaseInUpFrontServiceConcessionPayment


Increase
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0005000000.000
Percentage of IncreaseDecreaseInUpFrontServiceConcessionPayment0.00.00.0100.00.00.0

sjw:IncreaseDecreaseToRegulatoryAssetRelatedToBalancingAndMemorandumAccounts

sjw:IncreaseDecreaseToRegulatoryAssetRelatedToBalancingAndMemorandumAccounts


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1.750.3730.1833.74510-8.049-16.552-3.3-2.9371.6666.2210.951-2.350.476-2.5284.948-1.917-10.058-10.0193.801-3.02110-7.776-3.731-0.561-20.485421.518-0.4110.1091.7250.8031.0083.550.00.00.0
Percentage of IncreaseDecreaseToRegulatoryAssetRelatedToBalancingAndMemorandumAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

sjw:IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower

sjw:IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value8.146-1.04-8.4230.99313-4.292-6.2025.12410-6.723-9.1624.3016.863-2.69-7.3143.4747.83-0.454-2.8512.9814.945-1.392-4.1272.6911.8720.697-5.611
Percentage of IncreaseDecreaseinAccruedGroundwaterExtractionChargesPurchasedWaterandPower100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:MarketPriceStock us-gaap:Range

sjw:MarketPriceStock

srt:Maximum


Market
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value70.3471.0665.9374.7374.4769.2363.463.7665.3167.2968.1563.4768.1357.4353.055.3
Percentage of MarketPriceStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Minimum


Market
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value60.1158.5653.1149.4867.1361.2359.8354.7452.6356.1251.6851.9657.648.4645.7446.13
Percentage of MarketPriceStock85.582.480.666.290.188.494.485.980.683.475.881.984.584.486.383.4

sjw:NoncashChangeInAccruedPayables

sjw:NoncashChangeInAccruedPayables


Noncash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value9.992-6.601-0.5496.163-1.565-2.601-1.021-1.8435.232-2.884-0.881-0.4362.447-0.79-8.9683.2566.3511.634-14.0451.2885.0863.975-1.6853.3831.4344.408
Percentage of NoncashChangeInAccruedPayables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction

sjw:PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2.7044.6537.5124.541.4153.6293.5232.244.5273.2732.5462.8171.6231.4685.211-0.5111.4961.6467.3272.4731.8161.472.3622.2494.3041.8472.7792.8292.8571.6253.3253.6491.9332.6981.9882.3890.9580.8642.033.511.0480.7231.481.189
Percentage of PaymentsToAcquireWaterSystemsUsingContributionsInAidOfConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:PrincipalDebtSold us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

sjw:PrincipalDebtSold

srt:ParentCompany, us-gaap:SeniorNotes


Principal
Period End2020-08-11
Value50
Percentage of PrincipalDebtSold100.0

us-gaap:Parent, us-gaap:SeniorNotes


Principal
Period End2020-08-11
Value50
Percentage of PrincipalDebtSold100.0

sjw:RealEstateSellingExpenses us-gaap:ConsolidatedEntities

sjw:RealEstateSellingExpenses

sjw:SanJoseWaterCompany


Real
Period End2020-09-28
Value22000.0
Percentage of RealEstateSellingExpenses100.0

sjw:ReceiptsOfAdvancesAndContributionsInAidOfConstruction

sjw:ReceiptsOfAdvancesAndContributionsInAidOfConstruction


Receipts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value9.9864.6874.8157.9954.6486.4165.5315.5373.0014.835
Percentage of ReceiptsOfAdvancesAndContributionsInAidOfConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:RegulatoryBalancingAndMemorandumAccountsNet

sjw:RegulatoryBalancingAndMemorandumAccountsNet


Regulatory
Period End2021-06-302020-06-30
Value1.4771.629
Percentage of RegulatoryBalancingAndMemorandumAccountsNet100.0100.0

sjw:RegulatoryBalancingandMemorandumAccountsRevenueNet

sjw:RegulatoryBalancingandMemorandumAccountsRevenueNet


Regulatory
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.0914.829-3.9090.5538.744-5.174-6.221-2.376-0.631-0.306-0.788-4.611-1.836-0.859-3.868
Percentage of RegulatoryBalancingandMemorandumAccountsRevenueNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:RegulatoryMechanismsOtherNet

sjw:RegulatoryMechanismsOtherNet


Regulatory
Period End2021-06-302020-06-30
Value-416000.0-1076000.0
Percentage of RegulatoryMechanismsOtherNet100.0100.0

sjw:RegulatoryRateFilingsApprovedRevenueIncrease dei:LegalEntity, us-gaap:SubsequentEventType

sjw:RegulatoryRateFilingsApprovedRevenueIncrease

sjw:ConnecticutWaterCompany, us-gaap:SubsequentEvent


Regulatory
Period End2021-07-28
Value5208000.0
Percentage of RegulatoryRateFilingsApprovedRevenueIncrease100.0

sjw:RegulatoryRateFilingsRequestedIncreaseInRevenues dei:LegalEntity

sjw:RegulatoryRateFilingsRequestedIncreaseInRevenues

sjw:ConnecticutWaterCompany


Regulatory
Period End2021-01-15
Value20
Percentage of RegulatoryRateFilingsRequestedIncreaseInRevenues100.0

sjw:RegulatoryRateFilingsRequestedIncreaseInRevenues dei:LegalEntity, us-gaap:SubsequentEventType

sjw:ConnecticutWaterCompany, us-gaap:SubsequentEvent


Regulatory
Period End2021-01-15
Value20
Percentage of RegulatoryRateFilingsRequestedIncreaseInRevenues100.0

sjw:RegulatoryRateFilingsRequestedIncreaseInRevenuesCompletedInfrastructureInvestmentsNotCurrentlyInApprovedRatesAndSurcharges dei:LegalEntity

sjw:RegulatoryRateFilingsRequestedIncreaseInRevenuesCompletedInfrastructureInvestmentsNotCurrentlyInApprovedRatesAndSurcharges

sjw:ConnecticutWaterCompany


Regulatory
Period End2021-01-15
Value265
Percentage of RegulatoryRateFilingsRequestedIncreaseInRevenuesCompletedInfrastructureInvestmentsNotCurrentlyInApprovedRatesAndSurcharges100.0

sjw:RegulatoryRateFilingsRequestedIncreaseInRevenuesCompletedInfrastructureInvestmentsNotCurrentlyInApprovedRatesAndSurcharges dei:LegalEntity, us-gaap:SubsequentEventType

sjw:ConnecticutWaterCompany, us-gaap:SubsequentEvent


Regulatory
Period End2021-01-15
Value265
Percentage of RegulatoryRateFilingsRequestedIncreaseInRevenuesCompletedInfrastructureInvestmentsNotCurrentlyInApprovedRatesAndSurcharges100.0

sjw:RegulatoryRateFilingsRequestedProjectReplacementValue dei:LegalEntity, us-gaap:StatementScenario

sjw:RegulatoryRateFilingsRequestedProjectReplacementValue

sjw:MaineWaterCompany, srt:ScenarioForecast


Regulatory
Period End2022-06-30
Value60
Percentage of RegulatoryRateFilingsRequestedProjectReplacementValue100.0

sjw:RegulatoryRateFilingsRequestedReductionInWaterBillsForIncomeEligibleCustomers dei:LegalEntity

sjw:RegulatoryRateFilingsRequestedReductionInWaterBillsForIncomeEligibleCustomers

sjw:ConnecticutWaterCompany


Regulatory
Period End2021-01-15
Value15.0
Percentage of RegulatoryRateFilingsRequestedReductionInWaterBillsForIncomeEligibleCustomers100.0

sjw:RequestedWICASurchargeIncreaseIncreaseInRevenues dei:LegalEntity

sjw:RequestedWICASurchargeIncreaseIncreaseInRevenues

sjw:ConnecticutWaterCompany


Requested
Period End2020-10-28
Value956000.0
Percentage of RequestedWICASurchargeIncreaseIncreaseInRevenues100.0

sjw:StockIssuanceCostsIncurredButNotYetPaid

sjw:StockIssuanceCostsIncurredButNotYetPaid


Stock
Period End2021-03-31
Value353000.0
Percentage of StockIssuanceCostsIncurredButNotYetPaid100.0

sjw:UtilityPropertyInstalledByDeveloper

sjw:UtilityPropertyInstalledByDeveloper


Utility
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value1028000.0202000.04728000.01897000.078000.03076000.03186000.0059000.0-168000.01180000.02000.0-25000.0590000.02849000.0493000.0138000.0243000.04551000.01156000.0110000.03797000.0512000.039000.0495000.0-35000.03307000.001965000.01277000.01972000.0302000.0-1000.0-111000.03859000.0107000.0107000.00567000.00224000.00
Percentage of UtilityPropertyInstalledByDeveloper100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.00.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.340.340.320.320.320.30.30.30.30.280.280.280.28
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfPurchasedWater

us-gaap:CostOfPurchasedWater


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2715233525152335261324332315193022132028149.6971322169.2849.99215119.7313211810112217131519127.4169.8291611
Percentage of CostOfPurchasedWater100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanActuarialGainLoss

us-gaap:DefinedBenefitPlanActuarialGainLoss


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value-1.794-1.78-1.296-1.834-0.758-1.056
Percentage of DefinedBenefitPlanActuarialGainLoss100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value13000.012000.039000.0-665000.0741000.061000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value4.7424.7524.126-1.1694.122.312.312.3092.4262.4262.4272.062.0532.0661.8941.8931.8951.8171.8171.8171.671.6741.6671.381.381.381.1481.1481.1481.1051.105
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:DefinedBenefitPlanInterestCost


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value2.532.582.862.8162.9042.1132.1132.1121.8761.8761.8771.9121.921.9031.8711.8581.8781.7111.7111.7111.6511.6521.6511.4751.4751.4751.451.451.451.4451.445
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value2283000.02355000.02459000.02139000.02726000.02399000.02399000.02400000.02190000.02202000.02179000.02260000.02320000.02201000.02325000.02305000.02334000.02449000.02449000.02449000.01664000.01654000.01675000.02542000.02542000.02542000.02625000.02625000.02625000.02025000.02025000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DefinedBenefitPlanServiceCost


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value2688000.02735000.02390000.02337000.02443000.01479000.01479000.01479000.01601000.01607000.01596000.01307000.01288000.01326000.01244000.01249000.01240000.01363000.01363000.01363000.01056000.01051000.01059000.01239000.01239000.01239000.01157000.01157000.01157000.0947000.0947000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation us-gaap:IncomeStatementLocation

us-gaap:Depreciation

us-gaap:GeneralAndAdministrativeExpense


Depreciationus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.120.4930.2150.6580.371.0980.8740.6630.6730.6570.5780.5750.5720.5770.5490.5510.5790.5270.4190.4160.4220.4140.3990.40.3920.3990.3980.3960.3960.3960.3920.3850.3950.3840.4180.3790.3510.383
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfProperties

us-gaap:GainLossOnSaleOfProperties


Gain
Period End2021-06-292021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value3.03.0-0.1021.050.00.1840.00.7450.00.00.00.00.06.903100.1240.00.01.8860.00.00.2810.2730.00.00.00.01.0630.00.910.00.00.00.0
Percentage of GainLossOnSaleOfProperties100.0100.0100.0100.00.0100.00.0100.00.00.00.00.00.0100.0100.0100.00.00.0100.00.00.0100.0100.00.00.00.00.0100.00.0100.00.00.00.00.0

us-gaap:GainLossOnSaleOfProperties us-gaap:ConsolidatedEntities

sjw:SanJoseWaterCompany


Gain
Period End2020-09-28
Value1.048
Percentage of GainLossOnSaleOfProperties0.0

us-gaap:GoodwillPurchaseAccountingAdjustments us-gaap:BusinessAcquisition

us-gaap:GoodwillPurchaseAccountingAdjustments

sjw:CTWS


Goodwill
Period End2020-12-31
Value1108000.0
Percentage of GoodwillPurchaseAccountingAdjustments100.0

us-gaap:IncreaseDecreaseInAccruedTaxesPayable

us-gaap:IncreaseDecreaseInAccruedTaxesPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-0.6863.333-10.0160.7253.8591.875-10.5154.512-4.8924.851-6.6416.8753.1422.465-12.0642.198101.096.292-13.113-3.90810-9.6081.57-4.279.011-6.9740.2-0.3461.574-3.6292.661-1.4251.281-1.8063.3463.1490.404-5.911-0.0028.362-3.551-11.1532.176
Percentage of IncreaseDecreaseInAccruedTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPensionAndPostretirementObligations

us-gaap:IncreaseDecreaseInPensionAndPostretirementObligations


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value306000.01649000.0-3373000.0-3887000.01850000.02445000.0-6514000.0572000.0219000.01723000.0-2833000.0648000.0494000.01894000.0-4124000.0704000.0736000.01915000.0-3187000.0-10000.0679000.02169000.0-2643000.0-115000.0352000.02289000.0-1158000.0-334000.0-340000.01507000.0-4185000.0914000.0908000.02490000.0-3776000.01186000.01185000.01482000.0-2458000.0711000.0675000.01035000.0-5300000.045000.0
Percentage of IncreaseDecreaseInPensionAndPostretirementObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncreaseDecreaseInReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value15-7.725-15.5731128-5.498-16.6939.27817-6.093-13.1875.83113-4.53-16.6331013-6.015-13.9211111-3.724-10.6056.532.930.41-7.3623.5138.407-3.282-9.9941.35612-0.938-13.5685.6459.738-1.015-10.2864.98610-3.208-10.0035.292
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-339000.0-326000.0104000.0218000.07000.045000.0409000.0921000.0907000.0921000.0589000.0589000.0595000.0583000.0912000.0953000.0
Percentage of NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLeaseIncome

us-gaap:OperatingLeaseLeaseIncome


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value1320000.01344000.01444000.01370000.0
Percentage of OperatingLeaseLeaseIncome100.0100.0100.0100.0

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1315000.01403000.01444000.01370000.01309000.01353000.01369000.01366000.01379000.01441000.01321000.01341000.01421000.01391000.01327000.01563000.0
Percentage of OperatingLeasesIncomeStatementLeaseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value107000.038000.010000.0-135000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value107000.038000.010000.0-135000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value39000.0-14000.04000.0-50000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax


Other
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value04000.0-50000.000205000.0-158000.020000.01842000.0-1307000.0-861000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax0.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromRemovalCosts

us-gaap:PaymentsForProceedsFromRemovalCosts


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value448000.0461000.0679000.0228000.01378000.0271000.0652000.01365000.01484000.01525000.0120000.01002000.01653000.01134000.01033000.01605000.0321000.0397000.01943000.0610000.0413000.0395000.0527000.0614000.0214000.02318000.0677000.0299000.0346000.0229000.0881000.0644000.0292000.0878000.0156000.0674000.054000.038000.0114000.0-13000.0832000.0883000.0430000.0131000.0
Percentage of PaymentsForProceedsFromRemovalCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value183000.0432000.0214000.003761000.0310000.0625000.0222000.0000019000.000033000.0000087000.04000.069000.0
Percentage of PaymentsOfDebtIssuanceCosts100.0100.0100.00.0100.0100.0100.0100.00.00.00.00.0100.00.00.00.0100.00.00.00.00.0100.0100.0100.0

us-gaap:PaymentsToAcquireWaterSystems

us-gaap:PaymentsToAcquireWaterSystems


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value46645635386338322938353328374134272639313132252116212222252323181731262317191516122531
Percentage of PaymentsToAcquireWaterSystems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2021-06-302021-03-312014-12-312014-09-302013-12-312013-09-302012-12-312012-09-30
Value-0.474670.00.00.00.00.00.0
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.00.00.00.00.00.00.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions us-gaap:PlanName

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

sjw:EmployeeStockPurchasePlan


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value01026000.00860000.00970000.00792000.00811000.00718000.00653000.00645000.00570000.00503000.00451000.00462000.00
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions0.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1728491374147327.028382418201428262.50.08.2201814477.525166.016181623111.012160.00.00.00.07.03.17.51318
Percentage of ProceedsFromLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value59000.0-80000.0-126000.0-155000.0-15000.0106000.0-215000.0792000.0-6000.0592000.0-256000.0-112000.0-989000.0-1721000.00645000.0-3000.0-245000.0336000.0415000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyHeldForSale

us-gaap:ProceedsFromSaleOfPropertyHeldForSale


Proceeds
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value0.0831.0680.00.00.00.0-0.0010.0200.1240.01.9250.00.2914.2810.00.00.00.08.8310.05.5170.00.00.0
Percentage of ProceedsFromSaleOfPropertyHeldForSale100.0100.00.00.00.00.0100.00.0100.0100.00.0100.00.0100.0100.00.00.00.00.0100.00.0100.00.00.00.0

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment

sjw:SanJoseWaterCompany


Proceeds
Period End2020-09-28
Value1.075
Percentage of ProceedsFromSaleOfRealEstateHeldforinvestment100.0

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions


Public
Period End2021-06-302021-03-31
Value514000.0402000.0
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions100.0100.0

us-gaap:PublicUtilitiesApprovedRateIncreaseDecreaseAmount dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

us-gaap:PublicUtilitiesApprovedRateIncreaseDecreaseAmount

sjw:SanJoseWaterCompany, sjw:AdviceLetterNo.548


Public
Period End2020-08-27
Value1.219
Percentage of PublicUtilitiesApprovedRateIncreaseDecreaseAmount100.0

us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount dei:LegalEntity

us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount

sjw:ConnecticutWaterCompany


Public
Period End2020-10-28
Value0.956
Percentage of PublicUtilitiesRequestedRateIncreaseDecreaseAmount100.0

sjw:MaineWaterCompany


Public
Period End2020-11-232020-01-202019-12-20
Value0.3040.3710.221
Percentage of PublicUtilitiesRequestedRateIncreaseDecreaseAmount0.00.00.0

us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount dei:LegalEntity, us-gaap:SubsequentEventType

sjw:ConnecticutWaterCompany, us-gaap:SubsequentEvent


Public
Period End2020-10-28
Value0.956
Percentage of PublicUtilitiesRequestedRateIncreaseDecreaseAmount100.0

us-gaap:RepaymentsOfAdvancesForConstruction

us-gaap:RepaymentsOfAdvancesForConstruction


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value780000.0583000.0646000.0795000.0769000.0557000.0616000.0905000.0835000.0555000.0625000.0824000.0714000.0537000.0640000.0780000.0670000.0532000.0598000.0760000.0689000.0475000.0620000.0741000.0680000.0443000.0578000.0964000.0641000.0429000.0601000.0648000.0617000.0430000.0574000.0614000.0598000.0429000.0566000.0603000.0601000.0427000.0589000.0603000.0
Percentage of RepaymentsOfAdvancesForConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value0.082-0.0011582633810.05.01060.01.00.00.016132.51457122.510346.516181.0603.22.28.04.9235.51.00.00.00.05.58.31226
Percentage of RepaymentsOfLinesOfCredit0.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType

sjw:SJWGroupAndCLWSC, us-gaap:RevolvingCreditFacility, sjw:SJWTXCreditAgreement, sjw:ChaseBankN.A., us-gaap:LineOfCredit


Repayments
Period End2021-04-23
Value5.0
Percentage of RepaymentsOfLinesOfCredit0.0

us-gaap:RepaymentsOfLinesOfCredit dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

sjw:SJWCorp.andSJWTXInc., us-gaap:RevolvingCreditFacility, sjw:SJWTXCreditAgreement, sjw:ChaseBankN.A., us-gaap:LineOfCredit, us-gaap:SubsequentEvent


Repayments
Period End2021-04-23
Value5.0
Percentage of RepaymentsOfLinesOfCredit0.0

us-gaap:RepaymentsOfLinesOfCredit dei:LegalEntity, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType

sjw:SanJoseWaterCompany, us-gaap:RevolvingCreditFacility, sjw:ChaseBankN.A., us-gaap:LineOfCredit


Repayments
Period End2021-04-23
Value140
Percentage of RepaymentsOfLinesOfCredit0.0

us-gaap:RepaymentsOfLinesOfCredit dei:LegalEntity, us-gaap:CreditFacility, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

sjw:SanJoseWaterCompany, us-gaap:RevolvingCreditFacility, sjw:ChaseBankN.A., us-gaap:LineOfCredit, us-gaap:SubsequentEvent


Repayments
Period End2021-04-23
Value140
Percentage of RepaymentsOfLinesOfCredit0.0

us-gaap:SaleOfStockConsiderationReceivedOnTransaction us-gaap:SubsidiarySaleOfStock

us-gaap:SaleOfStockConsiderationReceivedOnTransaction

sjw:PublicStockOffering


Sale
Period End2021-03-08
Value58
Percentage of SaleOfStockConsiderationReceivedOnTransaction100.0

us-gaap:OverAllotmentOption


Sale
Period End2021-03-08
Value8.774
Percentage of SaleOfStockConsiderationReceivedOnTransaction15.1

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312014-08-04
Value65.766.3562.9566.9973.850060.4626.81
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2021-03-312020-09-302020-03-312019-09-302019-03-312018-09-302018-03-31
Value1026000.0860000.0970000.0792000.0811000.0718000.0653000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312020-09-302020-03-312019-09-302019-03-312018-09-302018-03-31
Value1026000.0860000.0970000.0792000.0811000.0718000.0653000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-9000.0-964000.0-985000.015000.0-785000.00-6000.0-132000.0-1552000.0-3000.0-2020000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-302019-03-312018-09-302018-06-302018-03-31
Value-9000.0-964000.0-985000.014000.0-785000.0-6000.0-132000.0-1552000.0-3000.0-2020000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.093.3100.0100.0100.0100.0100.0100.0

us-gaap:StockOptionPlanExpense us-gaap:PlanName

us-gaap:StockOptionPlanExpense

sjw:EmployeeStockPurchasePlan


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value86000.088000.098000.085000.074000.086000.071000.082000.065000.076000.067000.066000.062000.053000.052000.060000.054000.063000.046000.051000.047000.040000.042000.038000.043000.0
Percentage of StockOptionPlanExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrealizedGainLossOnInvestments

us-gaap:UnrealizedGainLossOnInvestments


Unrealized
Period End2020-09-302020-06-302020-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value77000.010000.0-135000.00140000.0-667000.0679000.0000
Percentage of UnrealizedGainLossOnInvestments100.0100.0100.00.0100.0100.0100.00.00.00.0

us-gaap:UnrealizedGainLossOnInvestments us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Unrealized
Period End2020-09-302020-06-302020-03-31
Value77000.010000.0-135000.0
Percentage of UnrealizedGainLossOnInvestments100.0100.0100.0

us-gaap:UtilitiesOperatingExpense

us-gaap:UtilitiesOperatingExpense


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1191011111231111001199680658199766775867158627557505564554953665848556557444861514445554538475242
Percentage of UtilitiesOperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpense us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RegulatedOperation, sjw:ReportableSegmentOne


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value115981081191079610389756074877061728368556073544853615246516355465263544146594942435243
Percentage of UtilitiesOperatingExpense96.696.897.296.796.495.786.392.893.392.892.388.192.691.196.796.295.895.596.196.395.795.295.495.495.295.295.595.895.595.794.696.095.993.895.896.396.295.395.595.495.3

us-gaap:RegulatedOperation, us-gaap:Corporate


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value115981081191079610389756074877061728368556073544853615246516355465263544146594942435243
Percentage of UtilitiesOperatingExpense96.696.897.296.796.495.786.392.893.392.892.388.192.691.196.796.295.895.596.196.395.795.295.495.495.295.295.595.895.595.794.696.095.993.895.896.396.295.395.595.495.3

us-gaap:UnregulatedOperation, sjw:ReportableSegmentOne


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1.9421.3691.6622.1611.7591.3611.611.6361.3560.8411.2231.6231.2780.8881.291.5111.2230.8310.9821.3551.0380.8820.2021.6421.3430.9621.091.5081.2160.8721.111.5381.3531.6820.9031.2331.1590.7480.8311.1450.807
Percentage of UtilitiesOperatingExpense1.61.31.51.71.61.41.31.71.71.31.51.61.71.31.71.81.71.41.61.81.81.70.42.52.42.02.02.32.11.82.02.32.43.81.92.02.21.71.82.11.8

us-gaap:UnregulatedOperation, sjw:ReportableSegmentTwo


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.8810.8810.8680.9610.850.8310.9170.9351.0080.8910.8650.9340.8910.8490.9230.8750.9420.9480.9131.1081.0211.0321.0021.051.0031.0241.0751.0411.0551.0221.6220.820.7480.810.9010.8050.8270.8460.7470.8440.859
Percentage of UtilitiesOperatingExpense0.70.90.80.80.80.80.81.01.21.41.10.91.21.31.21.01.31.61.51.51.82.01.81.61.82.12.01.61.82.12.91.21.31.81.91.31.61.91.61.51.9

us-gaap:UnregulatedOperation, us-gaap:AllOtherSegments


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1.2070.9780.5920.9731.3452.118134.4183.0662.9574.1859.2383.4764.2730.2950.8590.8040.8120.530.3560.4180.4961.3770.2890.2910.3990.2410.2490.3220.1850.2630.2740.2320.2490.2280.220.0070.480.4720.5410.481
Percentage of UtilitiesOperatingExpense1.01.00.50.81.22.111.64.63.84.55.29.34.66.30.41.01.11.40.80.50.71.02.50.40.50.80.40.40.60.40.50.40.40.60.50.40.01.11.01.01.1

us-gaap:UnregulatedOperation, us-gaap:Corporate


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value4.033.2283.1224.0953.9544.31166.9895.434.6896.273115.6456.012.5083.2452.9692.5912.4252.8192.4772.412.5812.9812.6372.3852.4062.7982.5932.0792.9952.6322.3332.7412.0322.2581.9932.0742.052.532.147
Percentage of UtilitiesOperatingExpense3.43.22.83.33.64.313.77.26.77.27.711.97.48.93.33.84.24.53.93.74.34.84.64.64.84.84.54.24.54.35.44.04.16.24.23.73.84.74.54.64.7

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value23232222222120151515131313131212121211111111101010109.4589.4679.4959.4858.6938.7878.7438.8168.1768.2888.3268.3087.8047.8037.7927.7947.0687.0827.07
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization us-gaap:PublicUtilityRegulatedOrUnregulatedStatus, us-gaap:StatementBusinessSegments

us-gaap:RegulatedOperation, sjw:ReportableSegmentOne


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value222222212220191414141313131311111111101010109.6869.6849.6939.6798.9768.9848.9898.9778.1888.2938.2648.3227.7377.7947.7687.7867.2827.2847.282
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization97.397.497.397.297.297.097.097.397.397.497.297.297.297.296.396.396.396.295.996.095.495.495.095.195.095.394.994.994.794.694.294.494.594.494.694.093.393.793.393.393.5

us-gaap:RegulatedOperation, us-gaap:Corporate


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value222222212220191414141313131311111111101010109.6869.6849.6939.6798.9768.9848.9898.9778.1888.2938.2648.3227.7377.7947.7687.7867.2827.2847.282
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization97.397.497.397.297.297.097.097.397.397.497.297.297.297.296.396.396.396.295.996.095.495.495.095.195.095.394.994.994.794.694.294.494.594.494.694.093.393.793.393.393.5

us-gaap:UnregulatedOperation, sjw:ReportableSegmentOne


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.110.1090.110.1160.1080.1080.1070.1110.1050.0970.0850.0850.0850.0830.1510.1430.1420.1360.130.1160.1180.1160.1110.1120.1210.090.090.0890.090.090.090.090.0920.0880.0910.0880.090.0910.0910.0920.09
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization0.50.50.50.50.50.50.50.70.70.60.60.60.60.61.31.21.21.11.21.01.11.01.11.11.20.91.00.90.90.91.01.01.11.01.11.11.11.11.21.21.2

us-gaap:UnregulatedOperation, sjw:ReportableSegmentTwo


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.2910.2890.290.2960.2980.3020.30.2990.2980.2990.2990.2990.2990.2990.2990.2990.2990.3230.3240.3250.3930.3940.3940.3920.3880.390.3920.3940.4160.4180.4150.4040.3870.4060.3480.4060.4680.4310.4310.4270.42
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization1.21.21.31.31.31.41.52.02.02.02.22.22.22.22.52.52.52.72.92.93.53.53.93.83.83.84.14.24.44.44.84.64.44.64.34.95.65.25.55.55.4

us-gaap:UnregulatedOperation, us-gaap:AllOtherSegments


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.2240.2230.2230.2230.2240.2230.2010.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization1.01.01.01.01.01.01.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnregulatedOperation, us-gaap:Corporate


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.6250.6210.6230.6350.630.6330.6080.410.4030.3960.3840.3840.3840.3820.450.4420.4410.4590.4540.4410.5110.510.5050.5040.5090.480.4820.4830.5060.5080.5050.4940.4790.4940.4390.4940.5580.5220.5220.5190.51
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization2.72.62.72.82.83.03.02.72.72.62.82.82.82.83.73.73.73.84.14.04.64.65.04.95.04.75.15.15.35.45.85.65.55.65.46.06.76.36.76.76.5

us-gaap:UtilitiesOperatingExpenseMaintenance

us-gaap:UtilitiesOperatingExpenseMaintenance


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6.5876.2656.1884.555.3346.0866.5284.9234.7294.3254.3784.984.5964.465.1374.3744.2583.6615.3944.2174.0543.8113.7693.9753.8443.3683.6523.9753.5733.2743.593.3253.4333.23.8173.4113.1332.9893.4063.3313.4763.0483.2822.8953.289
Percentage of UtilitiesOperatingExpenseMaintenance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseOther

us-gaap:UtilitiesOperatingExpenseOther


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value9.8319.4029.9151010109.7385.2955.1595.0994.7244.8364.6264.2124.1633.8743.6553.5113.3523.3113.2723.2323.0833.0333.0652.9972.9933.0733.0012.8623.3983.082.8822.7132.9342.9142.8412.7562.9033.032.822.5922.872.7262.568
Percentage of UtilitiesOperatingExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpensePurchasedPower

us-gaap:UtilitiesOperatingExpensePurchasedPower


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.3913.0033.1853.9943.4262.7252.4962.2941.4931.161.4061.8821.6241.2681.8042.51.7041.2871.112.1411.6141.2370.9212.51.5281.1722.33.4532.6231.4891.8833.0741.7770.8851.3542.2741.3030.8651.0281.9791.3731.0141.5792.1221.584
Percentage of UtilitiesOperatingExpensePurchasedPower100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseTaxes

us-gaap:UtilitiesOperatingExpenseTaxes


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value7.1497.5157.5247.7977.1027.4637.0274.0653.8484.1283.6434.0163.453.8663.3823.4543.1113.6953.0083.2132.6843.2182.7892.8932.893.0952.8352.8722.5752.8042.5482.6862.5342.5492.4522.3972.4192.4352.3142.3972.1232.0872.0882.0562.06
Percentage of UtilitiesOperatingExpenseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WaterProductionCosts

us-gaap:WaterProductionCosts


Water
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value614354695843505642264355393039523826314527202635262126393323294032182336272022322215203021
Percentage of WaterProductionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:Accruedgroundwaterextractionchargespurchasedwaterandpower

sjw:Accruedgroundwaterextractionchargespurchasedwaterandpower


Accruedgroundwaterextractionchargespurchasedwaterandpower
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value2618192726121722176.97113221811142118101013105.7717.163116.03
Percentage of Accruedgroundwaterextractionchargespurchasedwaterandpower100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:AdvancesForConstructionEstimatedRefundsAfterYearFive

sjw:AdvancesForConstructionEstimatedRefundsAfterYearFive


Advances
Period End2020-12-31
Value52
Percentage of AdvancesForConstructionEstimatedRefundsAfterYearFive100.0

sjw:AdvancesForConstructionEstimatedRefundsNextTwelveMonths

sjw:AdvancesForConstructionEstimatedRefundsNextTwelveMonths


Advances
Period End2020-12-31
Value3050000.0
Percentage of AdvancesForConstructionEstimatedRefundsNextTwelveMonths100.0

sjw:AdvancesForConstructionEstimatedRefundsYearFive

sjw:AdvancesForConstructionEstimatedRefundsYearFive


Advances
Period End2020-12-31
Value2896000.0
Percentage of AdvancesForConstructionEstimatedRefundsYearFive100.0

sjw:AdvancesForConstructionEstimatedRefundsYearFour

sjw:AdvancesForConstructionEstimatedRefundsYearFour


Advances
Period End2020-12-31
Value2958000.0
Percentage of AdvancesForConstructionEstimatedRefundsYearFour100.0

sjw:AdvancesForConstructionEstimatedRefundsYearThree

sjw:AdvancesForConstructionEstimatedRefundsYearThree


Advances
Period End2020-12-31
Value3038000.0
Percentage of AdvancesForConstructionEstimatedRefundsYearThree100.0

sjw:AdvancesForConstructionEstimatedRefundsYearTwo

sjw:AdvancesForConstructionEstimatedRefundsYearTwo


Advances
Period End2020-12-31
Value3050000.0
Percentage of AdvancesForConstructionEstimatedRefundsYearTwo100.0

sjw:AuthorizedTemporarySurchargePercentage dei:LegalEntity

sjw:AuthorizedTemporarySurchargePercentage

sjw:MaineWaterCompany


Authorized
Period End2021-06-23
Value22.65
Percentage of AuthorizedTemporarySurchargePercentage100.0

sjw:AuthorizedWICASurchargePercentage dei:LegalEntity

sjw:AuthorizedWICASurchargePercentage

sjw:AvonWaterCompany


Authorized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value8.519.319.319.310.09310.09310.0931
Percentage of AuthorizedWICASurchargePercentage100.0100.0100.0100.0100.0100.0100.0

sjw:ConnecticutWaterCompany


Authorized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value7.035.755.755.750.05750.03240.0324
Percentage of AuthorizedWICASurchargePercentage82.661.861.861.861.834.834.8

sjw:BalancingAndMemorandumAccountNet

sjw:BalancingAndMemorandumAccountNet


Balancing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value3128252117155.2831128313432262527262924253545424534424547508.7987.2797.697.9916.233.5495.739
Percentage of BalancingAndMemorandumAccountNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:BalancingandMemorandumCostRecoveryAccountNet

sjw:BalancingandMemorandumCostRecoveryAccountNet


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value181615119.3288.397.2236.9136.5497.9958.8649.7777.255.8996.220.00.00.00.0
Percentage of BalancingandMemorandumCostRecoveryAccountNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

sjw:BalancingandMemorandumCostRecoveryAccountNet us-gaap:RegulatoryAsset

sjw:CEMA


Balancingand
Period End2021-06-302021-03-312020-12-31
Value2.6182.2662.266
Percentage of BalancingandMemorandumCostRecoveryAccountNet14.513.714.7

sjw:OtherRegulatoryAssets


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.4460.4450.4450.4440.4440.4430.4460.6490.871.0151.090.00.00.00.0
Percentage of BalancingandMemorandumCostRecoveryAccountNet2.52.72.93.94.85.36.29.413.312.712.30.00.00.00.0

sjw:PRVMA


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.9281.0271.1081.211
Percentage of BalancingandMemorandumCostRecoveryAccountNet5.16.27.210.5

sjw:PensionBalancingAccount


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value4.213.8443.4782.7322.9852.8862.4491.174-0.233-1.237-1.843-1.976-2.137-2.298-2.4590.00.00.00.0
Percentage of BalancingandMemorandumCostRecoveryAccountNet23.323.322.623.732.034.433.917.0-3.6-15.5-20.8-20.2-29.5-39.0-39.50.00.00.00.0

sjw:WaterSupplyBalancingAccounts


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value9.8958.918.1237.1225.8995.0614.3285.095.9128.2179.617119.3878.1978.6790.00.00.00.0
Percentage of BalancingandMemorandumCostRecoveryAccountNet54.754.052.761.963.260.359.973.690.3102.8108.5120.2129.5139.0139.50.00.00.00.0

sjw:BalancingandMemorandumRevenueAccountNet

sjw:BalancingandMemorandumRevenueAccountNet


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1311109.8268.2876.658-1.944.6952123252219192126292425
Percentage of BalancingandMemorandumRevenueAccountNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:BalancingandMemorandumRevenueAccountNet us-gaap:RegulatoryAsset

sjw:A2012GeneralRateCaseTrueup


Balancingand
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value0.7530.7520.7520.7520.7520.7524.0997.7311011111111111115182033
Percentage of BalancingandMemorandumRevenueAccountNet6.57.57.79.111.3-38.887.335.743.244.349.358.757.552.144.054.376.679.80.0

sjw:A20142017WCMA


Balancingand
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.6660.6660.6660.6650.6650.7082.9185.3156.9127.757.4067.2777.0556.6791.589
Percentage of BalancingandMemorandumRevenueAccountNet5.76.66.88.010.0-36.562.224.629.430.332.237.835.930.86.1

sjw:Costofcapital


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-1.562-1.561-1.561-1.561-1.56-1.558-1.553-1.547-1.54-1.532-1.523-1.515-1.507-1.309-0.144-0.144-0.144-0.459-0.817-1.44
Percentage of BalancingandMemorandumRevenueAccountNet-11.8-13.4-15.5-15.9-18.8-23.480.1-32.9-7.1-6.5-6.0-6.6-7.8-6.7-0.7-0.5-0.5-1.9-3.20.0

sjw:MontereyWRAM


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value15131212108.9587.0157.8128.9867.8786.847
Percentage of BalancingandMemorandumRevenueAccountNet115.6119.0120.3122.6127.3134.5-361.6166.441.533.626.8

sjw:OtherRegulatoryAssets


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-0.829-2.399-2.224-2.414-2.4516.4674.7965.8437.1926.2494.9944.5244.5584.1363.7363.5843.5343.5163.4343.4
Percentage of BalancingandMemorandumRevenueAccountNet-6.3-20.6-22.1-24.6-29.697.1-247.2124.533.326.619.519.723.621.017.213.512.214.613.30.0

sjw:Taxmemorandum


Balancingand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.3330.3330.3330.3330.3320.332-6.643-6.618-6.585-6.545-6.504-5.955-5.496-0.9330.00.00.00.00.0
Percentage of BalancingandMemorandumRevenueAccountNet2.52.93.33.44.05.0342.4-141.0-30.4-27.9-25.5-25.9-28.5-4.70.00.00.00.00.0

sjw:BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRegulatoryAssesandDeferredChargesnet us-gaap:BusinessAcquisition

sjw:BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRegulatoryAssesandDeferredChargesnet

sjw:CTWS


Business
Period End2020-12-312020-09-302019-10-09
Value787883
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRegulatoryAssesandDeferredChargesnet100.0100.0100.0

sjw:ContractWithCustomerRefundLiabilityFairValueDisclosure

sjw:ContractWithCustomerRefundLiabilityFairValueDisclosure


Contract
Period End2020-12-312019-12-31
Value5050
Percentage of ContractWithCustomerRefundLiabilityFairValueDisclosure100.0100.0

sjw:CustomerAdvancesforConstructionNonRefundable

sjw:CustomerAdvancesforConstructionNonRefundable


Customer
Period End2020-12-31
Value29
Percentage of CustomerAdvancesforConstructionNonRefundable100.0

sjw:CustomerAdvancesforConstructionRefundedonServiceConnections

sjw:CustomerAdvancesforConstructionRefundedonServiceConnections


Customer
Period End2020-12-31
Value28
Percentage of CustomerAdvancesforConstructionRefundedonServiceConnections100.0

sjw:DeferredTaxAssetsAdvancesAndContributions

sjw:DeferredTaxAssetsAdvancesAndContributions


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2219149.929171616151514
Percentage of DeferredTaxAssetsAdvancesAndContributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostretirementBenefits

sjw:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostretirementBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value413220213.9274.0944.2164.4054.7574.644
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndPostretirementBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:DeferredTaxLiabilitiesChangeinAccountingPolicy

sjw:DeferredTaxLiabilitiesChangeinAccountingPolicy


Deferred
Period End2020-12-312019-12-312018-12-31
Value4763000.05721000.00
Percentage of DeferredTaxLiabilitiesChangeinAccountingPolicy100.0100.00.0

sjw:DeferredTaxLiabilitiesDeferredGainAndOtherPropertyRelated

sjw:DeferredTaxLiabilitiesDeferredGainAndOtherPropertyRelated


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value5.8755.8725.7535.649.7691111131415
Percentage of DeferredTaxLiabilitiesDeferredGainAndOtherPropertyRelated100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:DeferredTaxLiabilitiesPensionAndPostretirementBenefits

sjw:DeferredTaxLiabilitiesPensionAndPostretirementBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value31221819444447254643
Percentage of DeferredTaxLiabilitiesPensionAndPostretirementBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:DeferredTaxLiabilitiesRegulatoryAssetDebtPremium

sjw:DeferredTaxLiabilitiesRegulatoryAssetDebtPremium


Deferred
Period End2020-12-312019-12-312018-12-31
Value6290000.07002000.00
Percentage of DeferredTaxLiabilitiesRegulatoryAssetDebtPremium100.0100.00.0

sjw:DeferredTaxLiabilityRegulatoryAssetIncomeTaxTemporaryDifferences

sjw:DeferredTaxLiabilityRegulatoryAssetIncomeTaxTemporaryDifferences


Deferred
Period End2020-12-312019-12-312018-12-31
Value1195000.0295000.00
Percentage of DeferredTaxLiabilityRegulatoryAssetIncomeTaxTemporaryDifferences100.0100.00.0

sjw:DefinedBenefitPlanEstimatedTotalEmployerContributionsForCurrentFiscalYear

sjw:DefinedBenefitPlanEstimatedTotalEmployerContributionsForCurrentFiscalYear


Defined
Period End2020-09-30
Value14
Percentage of DefinedBenefitPlanEstimatedTotalEmployerContributionsForCurrentFiscalYear100.0

sjw:IncomeTaxPayableCurrent us-gaap:ConsolidatedEntities

sjw:IncomeTaxPayableCurrent

srt:ParentCompany


Income
Period End2020-12-31
Value3268000.0
Percentage of IncomeTaxPayableCurrent100.0

sjw:IncreaseInNumberOfServiceConnections dei:LegalEntity

sjw:IncreaseInNumberOfServiceConnections

sjw:CanyonLakeWaterServiceCompany


Increase
Period End2021-06-28
Value1400.0
Percentage of IncreaseInNumberOfServiceConnections100.0

sjw:IntercompanyNotesPayableCurrent us-gaap:ConsolidatedEntities

sjw:IntercompanyNotesPayableCurrent

srt:ParentCompany


Intercompany
Period End2020-12-312019-12-31
Value1924
Percentage of IntercompanyNotesPayableCurrent100.0100.0

sjw:IntercompanyNotesReceivableCurrent us-gaap:ConsolidatedEntities

sjw:IntercompanyNotesReceivableCurrent

srt:ParentCompany


Intercompany
Period End2020-12-312019-12-31
Value156.727
Percentage of IntercompanyNotesReceivableCurrent100.0100.0

sjw:IntercompanyReceivablesCurrent us-gaap:ConsolidatedEntities

sjw:IntercompanyReceivablesCurrent

srt:ParentCompany


Intercompany
Period End2020-12-31
Value258000.0
Percentage of IntercompanyReceivablesCurrent100.0

sjw:InvestmentsInSubsidiaries us-gaap:ConsolidatedEntities

sjw:InvestmentsInSubsidiaries

srt:ParentCompany


Investments
Period End2020-12-312019-12-31
Value15361466
Percentage of InvestmentsInSubsidiaries100.0100.0

sjw:LongTermPurchaseCommitmentMinimumVolumeRequiredNextTwelveMonths sjw:MajorSupplier

sjw:LongTermPurchaseCommitmentMinimumVolumeRequiredNextTwelveMonths

sjw:SantaClaraValleyWaterDistrict


Long
Period End2020-12-31
Value19794
Percentage of LongTermPurchaseCommitmentMinimumVolumeRequiredNextTwelveMonths100.0

sjw:NumberOfCountyResidencesServed dei:LegalEntity

sjw:NumberOfCountyResidencesServed

sjw:CanyonLakeWaterServiceCompany


Number
Period End2021-06-28
Value4000.0
Percentage of NumberOfCountyResidencesServed100.0

sjw:PublicUtilitiesNumberOfPeopleServed dei:LegalEntity

sjw:PublicUtilitiesNumberOfPeopleServed

sjw:SubsidiaryOne


Public
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value0.0590.0540.0490.0420.0390.0370.0360.0360.036
Percentage of PublicUtilitiesNumberOfPeopleServed100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:PublicUtilitiesNumberOfPeopleServed us-gaap:ConsolidatedEntities

sjw:ConnecticutWaterServiceInc.


Public
Period End2020-12-312019-12-31
Value0.4850.48
Percentage of PublicUtilitiesNumberOfPeopleServed822.0888.9

sjw:PublicUtilitiesNumberofCommunitiesServed us-gaap:ConsolidatedEntities

sjw:PublicUtilitiesNumberofCommunitiesServed

sjw:ConnecticutWaterServiceInc.


Public
Period End2020-12-312019-12-31
Value81.080.0
Percentage of PublicUtilitiesNumberofCommunitiesServed100.0100.0

sjw:PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment

sjw:PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment


Public
Period End2021-06-302021-03-312020-12-312019-12-31
Value3269322331982988
Percentage of PublicUtilitiesPropertyPlantAndEquipmentDepreciablePlantAndEquipment100.0100.0100.0100.0

sjw:PublicUtilitiesServiceArea us-gaap:Range

sjw:PublicUtilitiesServiceArea

srt:Minimum


Public
Period End2020-12-31
Value247.0
Percentage of PublicUtilitiesServiceArea100.0

sjw:PublicUtilitiesServiceConnections us-gaap:ConsolidatedEntities, us-gaap:StatementGeographical

sjw:PublicUtilitiesServiceConnections

sjw:ConnecticutWaterServiceInc., sjw:ConnecticutandMaine


Public
Period End2020-12-312019-12-31
Value139000.0137000.0
Percentage of PublicUtilitiesServiceConnections100.0100.0

sjw:RatioOfIndebtednessToCapital us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

sjw:RatioOfIndebtednessToCapital

srt:ParentCompany, sjw:A2011SeniorNotes, us-gaap:SeniorNotes


Ratio
Period End2020-12-31
Value66.66
Percentage of RatioOfIndebtednessToCapital100.0

sjw:RatioOfIndebtednessToCapital us-gaap:ConsolidatedEntities, us-gaap:GuaranteeObligationsByNature, us-gaap:LongtermDebtType

srt:ParentCompany, us-gaap:FinancialGuarantee, us-gaap:SeniorNotes


Ratio
Period End2020-12-31
Value66.66
Percentage of RatioOfIndebtednessToCapital100.0

sjw:RatioOfIndebtednessToCapital us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

sjw:SJWTXInc., us-gaap:SeniorNotes


Ratio
Period End2020-12-31
Value66.66
Percentage of RatioOfIndebtednessToCapital100.0

sjw:SanJoseWaterCompany, us-gaap:SeniorNotes


Ratio
Period End2020-12-31
Value66.66
Percentage of RatioOfIndebtednessToCapital100.0

sjw:RegulatoryAssetsFundedStatusOfObligation us-gaap:RegulatoryAsset

sjw:RegulatoryAssetsFundedStatusOfObligation

sjw:PostretirementPensionsAndOtherMedicalBenefits


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1241107174717175447469
Percentage of RegulatoryAssetsFundedStatusOfObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:RegulatoryBalancingandMemorandumAccountsNetUnderCollected

sjw:RegulatoryBalancingandMemorandumAccountsNetUnderCollected


Regulatory
Period End2020-12-312020-09-302017-12-312017-09-302017-09-27
Value1.5862.2453.7383.8111
Percentage of RegulatoryBalancingandMemorandumAccountsNetUnderCollected100.0100.0100.0100.0100.0

sjw:RegulatoryLiabilitiesAccruedBenefitCost us-gaap:RegulatoryAsset

sjw:RegulatoryLiabilitiesAccruedBenefitCost

sjw:PostretirementPensionsAndOtherMedicalBenefits


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value28365.6745.496.2396.5876.7047.036.9046.827
Percentage of RegulatoryLiabilitiesAccruedBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sjw:RegulatoryRateFilingsAverageCostOfDebtRateCurrent dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsAverageCostOfDebtRateCurrent

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value5.48
Percentage of RegulatoryRateFilingsAverageCostOfDebtRateCurrent100.0

sjw:RegulatoryRateFilingsAverageCostOfDebtRateRequested dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsAverageCostOfDebtRateRequested

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value6.2
Percentage of RegulatoryRateFilingsAverageCostOfDebtRateRequested100.0

sjw:RegulatoryRateFilingsBalancingAndMemorandumAccountRequestedRecoveryRefund dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsBalancingAndMemorandumAccountRequestedRecoveryRefund

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003


Regulatory
Period End2021-01-04
Value18
Percentage of RegulatoryRateFilingsBalancingAndMemorandumAccountRequestedRecoveryRefund100.0

sjw:RegulatoryRateFilingsBalancingAndMemorandumAccountRequestedRecoveryRefund dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003, us-gaap:SubsequentEvent


Regulatory
Period End2021-01-04
Value18
Percentage of RegulatoryRateFilingsBalancingAndMemorandumAccountRequestedRecoveryRefund100.0

sjw:RegulatoryRateFilingsCapitalStructureDebtPercentageCurrent dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsCapitalStructureDebtPercentageCurrent

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value47.0
Percentage of RegulatoryRateFilingsCapitalStructureDebtPercentageCurrent100.0

sjw:RegulatoryRateFilingsCapitalStructureDebtPercentageRequested dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsCapitalStructureDebtPercentageRequested

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value45.0
Percentage of RegulatoryRateFilingsCapitalStructureDebtPercentageRequested100.0

sjw:RegulatoryRateFilingsCapitalStructureEquityPercentageCurrent dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsCapitalStructureEquityPercentageCurrent

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value53.0
Percentage of RegulatoryRateFilingsCapitalStructureEquityPercentageCurrent100.0

sjw:RegulatoryRateFilingsCapitalStructureEquityPercentageRequested dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsCapitalStructureEquityPercentageRequested

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value55.0
Percentage of RegulatoryRateFilingsCapitalStructureEquityPercentageRequested100.0

sjw:RegulatoryRateFilingsProposedRateIncreasePercentofAuthorizedRevenueYearTwo dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsProposedRateIncreasePercentofAuthorizedRevenueYearTwo

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003


Regulatory
Period End2021-01-04
Value3.88
Percentage of RegulatoryRateFilingsProposedRateIncreasePercentofAuthorizedRevenueYearTwo100.0

sjw:RegulatoryRateFilingsRateOfReturnCurrent dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsRateOfReturnCurrent

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value7.64
Percentage of RegulatoryRateFilingsRateOfReturnCurrent100.0

sjw:RegulatoryRateFilingsRateOfReturnRequested dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsRateOfReturnRequested

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value8.11
Percentage of RegulatoryRateFilingsRateOfReturnRequested100.0

sjw:RegulatoryRateFilingsRequestedAuthorizationForCapitalBudgetAmount dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsRequestedAuthorizationForCapitalBudgetAmount

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003


Regulatory
Period End2021-01-04
Value435
Percentage of RegulatoryRateFilingsRequestedAuthorizationForCapitalBudgetAmount100.0

sjw:RegulatoryRateFilingsRequestedAuthorizationForCapitalBudgetAmount dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003, us-gaap:SubsequentEvent


Regulatory
Period End2021-01-04
Value435
Percentage of RegulatoryRateFilingsRequestedAuthorizationForCapitalBudgetAmount100.0

sjw:RegulatoryRateFilingsRequestedRateIncreasePercentOfAuthorizedRevenueYearThree dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsRequestedRateIncreasePercentOfAuthorizedRevenueYearThree

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003


Regulatory
Period End2021-01-04
Value4.24
Percentage of RegulatoryRateFilingsRequestedRateIncreasePercentOfAuthorizedRevenueYearThree100.0

sjw:RegulatoryRateFilingsRequestedRateIncreasePercentOfAuthorizedRevenueYearThree dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003, us-gaap:SubsequentEvent


Regulatory
Period End2021-01-04
Value4.24
Percentage of RegulatoryRateFilingsRequestedRateIncreasePercentOfAuthorizedRevenueYearThree100.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearOne dei:LegalEntity

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearOne

sjw:MaineWaterCompany


Regulatory
Period End2021-03-10
Value6.659
Percentage of RegulatoryRateFilingsRequestedRateIncreaseYearOne100.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearOne dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:SanJoseWaterCompany, sjw:AdviceLetterNo561561A


Regulatory
Period End2021-05-27
Value17
Percentage of RegulatoryRateFilingsRequestedRateIncreaseYearOne0.0

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003


Regulatory
Period End2021-01-042020-11-16
Value5111
Percentage of RegulatoryRateFilingsRequestedRateIncreaseYearOne0.00.0

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value6.418
Percentage of RegulatoryRateFilingsRequestedRateIncreaseYearOne0.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearOne dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003, us-gaap:SubsequentEvent


Regulatory
Period End2021-01-04
Value51
Percentage of RegulatoryRateFilingsRequestedRateIncreaseYearOne0.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearThree dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearThree

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003


Regulatory
Period End2021-01-04
Value19
Percentage of RegulatoryRateFilingsRequestedRateIncreaseYearThree100.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearThree dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003, us-gaap:SubsequentEvent


Regulatory
Period End2021-01-04
Value19
Percentage of RegulatoryRateFilingsRequestedRateIncreaseYearThree100.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearTwo dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearTwo

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003


Regulatory
Period End2021-01-04
Value16
Percentage of RegulatoryRateFilingsRequestedRateIncreaseYearTwo100.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseYearTwo dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003, us-gaap:SubsequentEvent


Regulatory
Period End2021-01-04
Value16
Percentage of RegulatoryRateFilingsRequestedRateIncreaseYearTwo100.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne dei:LegalEntity

sjw:RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne

sjw:MaineWaterCompany


Regulatory
Period End2021-03-10
Value77.5
Percentage of RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne100.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:SanJoseWaterCompany, sjw:AdviceLetterNo561561A


Regulatory
Period End2021-05-27
Value4.34
Percentage of RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne0.0

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003


Regulatory
Period End2021-01-042020-11-16
Value13.353.04
Percentage of RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne0.00.0

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value1.61
Percentage of RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne0.0

sjw:RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:SubsequentEventType

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2101003, us-gaap:SubsequentEvent


Regulatory
Period End2021-01-04
Value13.35
Percentage of RegulatoryRateFilingsRequestedRateIncreaseasPercentageofTotalRevenueatTimeofRequestYearOne0.0

sjw:RegulatoryRateFilingsReturnOfEquityRateApproved dei:LegalEntity, us-gaap:SubsequentEventType

sjw:RegulatoryRateFilingsReturnOfEquityRateApproved

sjw:ConnecticutWaterCompany, us-gaap:SubsequentEvent


Regulatory
Period End2021-07-28
Value9.0
Percentage of RegulatoryRateFilingsReturnOfEquityRateApproved100.0

sjw:RegulatoryRateFilingsReturnOfEquityRateCurrent dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsReturnOfEquityRateCurrent

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value8.9
Percentage of RegulatoryRateFilingsReturnOfEquityRateCurrent100.0

sjw:RegulatoryRateFilingsReturnOfEquityRateRequested dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:RegulatoryRateFilingsReturnOfEquityRateRequested

sjw:SanJoseWaterCompany, sjw:GeneralRateCaseNo2105004


Regulatory
Period End2021-05-03
Value10.3
Percentage of RegulatoryRateFilingsReturnOfEquityRateRequested100.0

sjw:RequestedWICASurchargeIncreaseDecreasePercentage dei:LegalEntity

sjw:RequestedWICASurchargeIncreaseDecreasePercentage

sjw:ConnecticutWaterCompany


Requested
Period End2020-10-282020-02-072020-01-28
Value1.11-0.00090.026
Percentage of RequestedWICASurchargeIncreaseDecreasePercentage100.0100.0100.0

sjw:RequestedWICASurchargeIncreaseDecreasePercentage dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding

sjw:ConnecticutWaterCompany, sjw:WICA


Requested
Period End2021-02-012020-10-28
Value0.091.11
Percentage of RequestedWICASurchargeIncreaseDecreasePercentage0.0100.0

sjw:RequestedWICASurchargePercentage dei:LegalEntity

sjw:RequestedWICASurchargePercentage

sjw:ConnecticutWaterCompany


Requested
Period End2021-03-032020-10-282020-02-072020-01-28
Value7.036.940.05750.0584
Percentage of RequestedWICASurchargePercentage100.0100.0100.0100.0

sjw:RequestedWICASurchargePercentage dei:LegalEntity, us-gaap:SubsequentEventType

sjw:ConnecticutWaterCompany, us-gaap:SubsequentEvent


Requested
Period End2020-10-282020-02-072020-01-28
Value6.850.05750.0584
Percentage of RequestedWICASurchargePercentage98.7100.0100.0

sjw:RequestedWISCSurchargeIncreaseDecreasePercentage dei:LegalEntity, us-gaap:Range

sjw:RequestedWISCSurchargeIncreaseDecreasePercentage

sjw:MaineWaterCompany, srt:Maximum


Requested
Period End2020-11-232020-01-20
Value5.00.03
Percentage of RequestedWISCSurchargeIncreaseDecreasePercentage100.0100.0

sjw:MaineWaterCompany, srt:Minimum


Requested
Period End2020-11-232020-01-20
Value1.10.0176
Percentage of RequestedWISCSurchargeIncreaseDecreasePercentage22.058.7

sjw:RestrictedNetAssetsSubsidiaries

sjw:RestrictedNetAssetsSubsidiaries


Restricted
Period End2020-12-31
Value283
Percentage of RestrictedNetAssetsSubsidiaries100.0

sjw:RestrictedNetAssetsSubsidiariesPercentOfConsolidatedAssets

sjw:RestrictedNetAssetsSubsidiariesPercentOfConsolidatedAssets


Restricted
Period End2020-12-31
Value31.0
Percentage of RestrictedNetAssetsSubsidiariesPercentOfConsolidatedAssets100.0

sjw:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

sjw:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageGrantDateFairValue

sjw:RestrictedStockAndDeferredRestrictedStock, sjw:IncentivePlan


Share
Period End2020-12-312019-12-312018-12-31
Value53.4346.6338.8
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageGrantDateFairValue100.0100.0100.0

sjw:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

sjw:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedWeightedAverageGrantDateFairValue

sjw:RestrictedStockAndDeferredRestrictedStock, sjw:IncentivePlan


Share
Period End2020-12-31
Value34.55
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedWeightedAverageGrantDateFairValue100.0

sjw:UnrecognizedTaxBenefitsGross

sjw:UnrecognizedTaxBenefitsGross


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6468000.04037000.01411000.01359000.01184000.0795000.0684000.0565000.02130000.01874000.0
Percentage of UnrecognizedTaxBenefitsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3866000.03614000.03891000.01512000.0272000.0190000.0200000.0200000.0150000.0170000.0225000.0225000.0235000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligation


Asset
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4619000.04803000.04803000.05231000.04835000.04249000.04355000.04612000.04650000.04296000.0
Percentage of AssetRetirementObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationLegallyRestrictedAssetsFairValue

us-gaap:AssetRetirementObligationLegallyRestrictedAssetsFairValue


Asset
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value939000.0942000.0942000.01184000.03318000.03309000.03365000.02925000.03049000.02500000.0
Percentage of AssetRetirementObligationLegallyRestrictedAssetsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

sjw:CTWS


Business
Period End2020-12-312020-09-302019-10-09
Value153015291536
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther

sjw:CTWS


Business
Period End2020-12-312020-09-302019-10-09
Value414142
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities

sjw:CTWS


Business
Period End2020-12-312020-09-302019-10-09
Value125125125
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities

sjw:CTWS


Business
Period End2020-12-312020-09-302019-10-09
Value102100107
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

sjw:CTWS


Business
Period End2020-12-312020-09-302019-10-09
Value689687694
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities

sjw:CTWS


Business
Period End2020-12-312020-09-302019-10-09
Value101110
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities100.0100.0100.0

us-gaap:CapitalizationLongtermDebtAndEquity

us-gaap:CapitalizationLongtermDebtAndEquity


Capitalization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value23612281220422202211220021731407140413991320906896889894883867854854775760750764751748745744741656654656654648608610607600605607604599550
Percentage of CapitalizationLongtermDebtAndEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizationLongtermDebtAndEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Capitalization
Period End2020-12-312019-12-31
Value14721445
Percentage of CapitalizationLongtermDebtAndEquity66.866.5

us-gaap:CashSurrenderValueOfLifeInsurance

us-gaap:CashSurrenderValueOfLifeInsurance


Cash
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value4311000.03913000.03739000.03650000.03829000.0
Percentage of CashSurrenderValueOfLifeInsurance100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value128125125123120117112
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContributionsInAidOfConstruction

us-gaap:ContributionsInAidOfConstruction


Contributions
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value302297296291288287286170168167168167164162160157154153151147146145141139139138138135134132132130128128128125125124123123121121
Percentage of ContributionsInAidOfConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedPremium

us-gaap:DebtInstrumentUnamortizedPremium


Debt
Period End2020-12-312019-12-312018-12-31
Value22250.0
Percentage of DebtInstrumentUnamortizedPremium100.0100.00.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value270262140121234224213169177159
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value78686035282627292925
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value550000.01046000.0005065000.05814000.06439000.02495000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.00.00.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6792000.07211000.03336000.03110000.04802000.03410000.01697000.01596000.01272000.01181000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsStateTaxes

us-gaap:DeferredTaxAssetsStateTaxes


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value756000.0456000.0981000.01058000.02331000.01322000.001107000.01193000.01429000.0
Percentage of DeferredTaxAssetsStateTaxes100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value619000.0649000.0418000.0441000.0644000.0676000.0709000.0741000.0773000.0805000.0
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve


Deferred
Period End2020-12-312019-12-312018-12-31
Value6290000.07002000.00
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve100.0100.00.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-31
Value3443000.03693000.00
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.00.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value7.5444.1480.9681.0410.6320.8381.2111.8112.4571.131
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2092111149417716515012511096
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-31
Value297000.01962000.00
Percentage of DeferredTaxLiabilitiesTaxDeferredIncome100.0100.00.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value353217181616
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value386338187196174164
Percentage of DefinedBenefitPlanBenefitObligation1078.61039.31074.31089.91057.61000.4

us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5041252419
Percentage of DefinedBenefitPlanBenefitObligation141.8128.3145.1137.9115.7

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value8.8578.9085.3665.032
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value91865043
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter1028.8976.3944.7871.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.4411.3360.8510.795
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value15137.2356.941
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths1090.01042.7850.2873.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.6711.6480.9920.916
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value16158.8868.013
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive989.9946.8895.8874.8

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.6761.60.9510.868
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value16158.4197.741
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour956.0949.2885.3891.8

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.5961.5130.9030.823
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value15148.0137.392
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree1001.2966.7887.4898.2

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.5111.4470.8520.817
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value15147.557.032
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo999.1992.3886.2860.7

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear us-gaap:Range

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

srt:Maximum


Defined
Period End2020-12-31
Value8481000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets


Defined
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2972692382202601541521461331451401371401301261221191141111081091011041051039999959585828179726965
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-16315000.0-15320000.0-11640000.0-11199000.0-11095000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-107970000.0-94719000.0-60267000.0-62847000.0-60202000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan661.8618.3517.8561.2542.6

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

us-gaap:CashAndCashEquivalents, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5.00.050.040.140.2
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalents, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4.00.050.060.050.08
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations80.0100.0150.035.740.0

us-gaap:DebtSecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value29.00.330.380.250.3
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations580.0660.0950.0178.6150.0

us-gaap:DebtSecurities, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value35.00.360.330.320.34
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations700.0720.0825.0228.6170.0

us-gaap:EquitySecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value66.00.630.580.60.5
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1320.01260.01450.0428.6250.0

us-gaap:EquitySecurities, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value61.00.60.60.630.58
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1220.01200.01500.0450.0290.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value13111410129.105115.0115.5733.6527.1814.5684.8373.626.0113.6954.543.0474.6963.8894.444.3514.2034.2463.443.4743.7553.8223.1053.2493.1983.6432.9713.0383.0693.3662.8132.9242.7443.373.7692.72
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

sjw:RestrictedStockAndDeferredRestrictedStock


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value6528000.07203000.04118000.04987000.06050000.06113000.03915000.03466000.04138000.04306000.01801000.02180000.02462000.02394000.01569000.01182000.01658000.01642000.0902000.01277000.01653000.01705000.01231000.01563000.01927000.01988000.01606000.01863000.01163000.01132000.0618000.0745000.0855000.01133000.0622000.0735000.0848000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:PlanName

sjw:EmployeeStockPurchasePlan


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value30000.0123000.0160000.0116000.025000.0102000.0206000.0134000.025000.0116000.0111000.0117000.023000.0107000.099000.092000.020000.093000.094000.074000.015000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized0.51.73.92.30.41.75.33.90.62.76.25.40.94.56.37.81.25.710.45.80.9

us-gaap:FiniteLivedCustomerRelationshipsGross

us-gaap:FiniteLivedCustomerRelationshipsGross


Finite
Period End2020-12-312019-12-312018-12-31
Value13130.0
Percentage of FiniteLivedCustomerRelationshipsGross100.0100.00.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

sjw:ConcessionFees


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6324000.06052000.05780000.05508000.05236000.04964000.04692000.04420000.04148000.03876000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CustomerRelationships


Finite
Period End2020-12-312019-12-31
Value1094000.0201000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization17.33.3

us-gaap:OtherIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6479000.07127000.02960000.02585000.02412000.02153000.0860000.0765000.0712000.0643000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization102.5117.851.246.946.143.418.317.317.216.6

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value1401000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value1401000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value1401000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value1401000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value1401000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value1401000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value353535353232331515151515151514252525232323232222222019191919181818181515151514141413
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

sjw:ConcessionFees


Finite
Period End2020-12-312020-01-082019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6.85.06.86.86.86.86.86.86.86.86.8
Percentage of FiniteLivedIntangibleAssetsGross19.30.020.343.047.228.330.035.237.143.746.2

sjw:Infrastructure


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value5.9843.8313.8312.5372.5242.352
Percentage of FiniteLivedIntangibleAssetsGross17.011.524.217.610.510.4

us-gaap:CustomerRelationships


Finite
Period End2020-12-31
Value1.4
Percentage of FiniteLivedIntangibleAssetsGross4.0

us-gaap:OtherIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value14138.9997.613171512118.7617.932
Percentage of FiniteLivedIntangibleAssetsGross42.639.657.052.871.770.064.862.956.353.8

us-gaap:ServiceAgreements


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value3.9994.1284.1283.771131211107.362
Percentage of FiniteLivedIntangibleAssetsGross11.412.426.126.255.753.257.354.947.3

us-gaap:IncomeTaxesReceivable

us-gaap:IncomeTaxesReceivable


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4.6717.0412.2222.7837.0978.8370.0631.3970.01.8880.02.2527.0727.9810.00.0109.796204.5052.351104.6383.8871.2518.8711.9810.01.0751.6610.00.0270.00.4890.00.6485.1735.2484.1142.1347.634
Percentage of IncomeTaxesReceivable100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value131712171218139.227.9727.387.1327.4026.9687.46.8697.2476.8236.7296.3095.7756.25.7736.1935.7476.1915.756.3615.9145.3685.5435.3695.5525.3425.5715.3555.5345.3595.545.3765.445.2635.244
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPayableCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Interest
Period End2020-12-312019-12-31
Value3.1953.748
Percentage of InterestPayableCurrent24.828.5

us-gaap:InvestmentBuildingAndBuildingImprovements

us-gaap:InvestmentBuildingAndBuildingImprovements


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value4444434343434343434343434342424242424644465757565656565656565959595755546367
Percentage of InvestmentBuildingAndBuildingImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Investments

us-gaap:Investments


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value151514131313120.0
Percentage of Investments100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:LifeInsuranceCorporateOrBankOwnedAmount

us-gaap:LifeInsuranceCorporateOrBankOwnedAmount


Life
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value8026000.07497000.07282000.07207000.07086000.0
Percentage of LifeInsuranceCorporateOrBankOwnedAmount100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:ConsolidatedEntities, us-gaap:CreditFacility

us-gaap:LineOfCredit

srt:ParentCompany, us-gaap:RevolvingCreditFacility


Line
Period End2020-12-312019-12-312018-12-312017-12-31
Value17511710025
Percentage of LineOfCredit100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd

srt:ParentCompany, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Line
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.780.03730.02940.0227
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd100.0100.0100.0100.0

us-gaap:LinesOfCreditCurrent

us-gaap:LinesOfCreditCurrent


Lines
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-09-302011-06-302010-12-31
Value13812117512514613111762553210076593925130.00.01463553934212011138.25237227.00.022150.05.56.84.0
Percentage of LinesOfCreditCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LongTermDebtFairValue

us-gaap:FairValueInputsLevel2


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1546148615701575151614171396641592590490485492512537534525506502479481498500455440489460469406410395395404439455456441433
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value1179
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-31
Value76
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value3.648
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value48
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value4.36
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value39
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:NetRegulatoryAssets

us-gaap:NetRegulatoryAssets


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value1581361381321208197100103104989799152154149151159169165168168170173174126848383134132131130119
Percentage of NetRegulatoryAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NontradeReceivablesCurrent

us-gaap:NontradeReceivablesCurrent


Nontrade
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4054000.05455000.04269000.02828000.02043000.02036000.02833000.02719000.02456000.02040000.01203000.0826000.01034000.01578000.01118000.01609000.01038000.03170000.03383000.0950000.01699000.01731000.02192000.02682000.03074000.03027000.03385000.0719000.0850000.0966000.0476000.0565000.01152000.0939000.0854000.0982000.01108000.01298000.0746000.01194000.0885000.0993000.0
Percentage of NontradeReceivablesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent

us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent


Operating
Period End2020-12-31
Value4264000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueCurrent100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears


Operating
Period End2020-12-31
Value2833000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueInFiveYears100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears


Operating
Period End2020-12-31
Value2645000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueInFourYears100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears


Operating
Period End2020-12-31
Value2565000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueInThreeYears100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears


Operating
Period End2020-12-31
Value2745000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueInTwoYears100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter

us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter


Operating
Period End2020-12-31
Value7711000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueThereafter100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

stpr:CT


Operating
Period End2020-12-312019-12-31
Value2932
Percentage of OperatingLossCarryforwards100.0100.0

stpr:ME


Operating
Period End2020-12-312019-12-31
Value1.0879.506
Percentage of OperatingLossCarryforwards3.729.2

us-gaap:OtherAssetsMiscellaneousNoncurrent

us-gaap:OtherAssetsMiscellaneousNoncurrent


Other
Period End2021-06-302021-03-312020-12-312019-12-31
Value7624000.05702000.06883000.04676000.0
Percentage of OtherAssetsMiscellaneousNoncurrent100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value133000.096000.094000.086000.087000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2760000.01899000.01323000.01099000.01032000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities2075.21978.11407.41277.91186.2

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1615111111
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Pension