SHLX


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

Table of contents



us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostsAndExpenses
shlx:AssetAcquisition
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestIncomeOperating

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingCostsAndExpenses

us-gaap:OperatingIncomeLoss
shlx:AssetAcquisition
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherIncome

us-gaap:ProfitLoss
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:MajorCustomers, us-gaap:ProductOrService

us-gaap:Revenues
shlx:AssetAcquisition
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:AssetsCurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent
us-gaap:MajorCustomers

us-gaap:Land

us-gaap:MachineryAndEquipmentGross
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:AssetsNoncurrent

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:ConstructionInProgressGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent
us-gaap:MajorCustomers

us-gaap:LiabilitiesCurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:LiabilitiesNoncurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquireProductiveAssets
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:Ownership, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:StatementScenario

us-gaap:NetCashProvidedByUsedInFinancingActivities

shlx:AllocatedGeneralCorporateExpensesRelatedParty

shlx:AllocatedOperatingExpensesRelatedParty

shlx:AllowanceOilNetRealizableValueReduction

shlx:CapitalContributiontoEquityMethodInvestment

shlx:CapitalLeaseRateIncreaseDecrease

shlx:ChangeInAccruedCapitalExpenditures

shlx:CostofGoodsSoldThirdParties
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:RelatedPartyTransactionsByRelatedParty
shlx:DebtInstrumentEarlyPrepaymentFee

shlx:DistributionToHoldersOfIncentiveDistributionRightsWaived

shlx:DistributionsPaidToNoncontrollingInterest

shlx:DistributionsPaidToUnitholdersAndGeneralPartner

shlx:DistributionsToUnitholdersAndGeneralPartner
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:EquityMethodInvestmentAmortizationAccretion
us-gaap:PropertyPlantAndEquipmentByType
shlx:FinanceLeaseCost

shlx:IncomeDistributionsInExcess
us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:IncreaseDecreaseInAllowanceOil

shlx:InsuranceExpenseRelatedParties
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
shlx:InvestmentExcessDistribution

shlx:LeaseRevenueRelatedParties
us-gaap:MajorCustomers

shlx:MaintenanceServiceCostsRelatedParty

shlx:ManagementAgreementFeeRelatedParty
us-gaap:PartnerTypeOfPartnersCapitalAccount
shlx:NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitDilutedNetOfTax
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:Ownership, us-gaap:StatementScenario
shlx:NoncontrollingInterestInterestTransferred

shlx:OmnibusAgreementFeeRelatedParty

shlx:OperationsAndMaintenanceRelatedParties

shlx:OtherOperatingExpensesRelatedParties

shlx:OtherSeveranceSalariesAndOtherPayrollExpensesRelatedParty

shlx:PaymentsOfFeeOnCreditFacility

shlx:ProceedsFromOtherContributionsFromParent
us-gaap:PartnerTypeOfPartnersCapitalAccount
shlx:WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingDiluted

us-gaap:AssetImpairmentCharges
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:StatementScenario, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ProductOrService
us-gaap:CapitalizedContractCostAmortization
us-gaap:MajorCustomers
us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress
us-gaap:ProductOrService
us-gaap:PurchaseCommitmentExcludingLongtermCommitment
us-gaap:MajorCustomers
us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:DefinedContributionPlanCostRecognized

us-gaap:Depreciation

us-gaap:DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:ImpairmentOfOilAndGasProperties
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerAsset

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInPrepaidExpense

us-gaap:InterestExpenseRelatedParty
us-gaap:ProductOrService, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SaleLeasebackTransactionDescription
us-gaap:InterestIncomeRelatedParty
dei:LegalEntity, us-gaap:Ownership, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
us-gaap:Ownership, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:Ownership, us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementClassOfStock

us-gaap:ManagingMemberOrGeneralPartnerSubsequentDistributionAmount
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetIncomeLossAllocatedToGeneralPartners

us-gaap:NetIncomeLossAllocatedToLimitedPartners
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasic

us-gaap:NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseLeaseIncome

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherPostretirementBenefitExpense

us-gaap:PartnersCapitalAccountDistributions
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PartnersCapitalAccountExchangesAndConversions
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementEquityComponents
dei:LegalEntity
us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
us-gaap:ProductOrService, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SaleLeasebackTransactionDescription
us-gaap:ProceedsFromInterestReceived

us-gaap:ProceedsFromIssuanceOfPrivatePlacement

us-gaap:ProceedsFromLimitedPartnershipInvestments
us-gaap:ProductOrService, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SaleLeasebackTransactionDescription
us-gaap:ProceedsFromRepaymentsOfRelatedPartyDebt
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty

us-gaap:SeveranceCosts1

us-gaap:TaxesExcludingIncomeAndExciseTaxes
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingBasic
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:WeightedAverageLimitedPartnershipUnitsOutstanding
us-gaap:PartnerTypeOfPartnersCapitalAccount
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:WeightedAverageLimitedPartnershipUnitsOutstandingDiluted
us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:AccrualForTransportationAndProjectEngineering

shlx:AccruedInterestRelatedPartiesCurrent

shlx:AccruedLiabilitiesRelatedPartiesCurrent

shlx:AllowanceOil

shlx:ContractWithCustomerAmortizationReminderOfFiscalYear

shlx:ContractWithCustomerAmortizationYearFive

shlx:ContractWithCustomerAmortizationYearOne

shlx:ContractWithCustomerAmortizationYearThree

shlx:ContractWithCustomerLiabilityRelatedPartiesCurrent

shlx:DeferredRevenueRelatedPartiesCurrent
us-gaap:Ownership
shlx:EquitySecuritiesWithoutReadilyDeterminableFairValuePercent

shlx:FinanceLeaseAccumulatedDepreciation

shlx:FinanceLeaseLiabilityPaymentsDueExecutoryCosts

shlx:FinanceLeaseLiabilityPaymentsDuePrincipalAmount

shlx:LeaseRightOfUseAsset

shlx:LesseeOperatingLeasePaymentsDueRelatedToOptionsToExtend

shlx:LessorOperatingLeasePaymentToBeReceivedYearFourAndFive

shlx:LessorOperatingLeasePaymentToBeReceivedYearTwoAndThree
us-gaap:ProductOrService
shlx:LessorOperatingLeasePaymentsToBeReceivedFourToFiveYears

shlx:LessorOperatingLeasePaymentsToBeReceivedRelatedToOptionsToExtend
us-gaap:ProductOrService
shlx:LessorOperatingLeasePaymentsToBeReceivedTwoToThreeYears

shlx:OperatingAndFinanceLeaseLiabilities

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDue

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueAfterYearFive

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueNextTwelveMonths

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFive

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFour

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearThree

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearTwo

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsUndiscountedExcessAmount

shlx:OperatingLeaseAccumulatedDepreciation

shlx:OtherAccruedLiabilitiesRelatedPartiesCurrent

shlx:PrepaidExpensesRelatedPartiesCurrent

shlx:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetExcludingConstructionInProgress

shlx:PropertyPlantAndEquipmentExcludingConstructionInProgress

us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:AccountsReceivableRelatedPartiesCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:BuildingsAndImprovementsGross

us-gaap:CashUninsuredAmount

us-gaap:ContractWithCustomerAssetGrossCurrent
us-gaap:MajorCustomers

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:DebtInstrumentCarryingAmount
us-gaap:CounterpartyName, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DebtWeightedAverageInterestRate
us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:DueFromRelatedParties

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
shlx:AssetAcquisition, shlx:InvestmentName
us-gaap:EquityMethodInvestmentOwnershipPercentage
shlx:AssetAcquisition, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
us-gaap:Ownership

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:LessorOperatingLeasePaymentsToBeReceived
us-gaap:ProductOrService

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths
us-gaap:ProductOrService

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter
us-gaap:ProductOrService

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:LimitedPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LineOfCredit
us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LongTermDebtFairValue
dei:LegalEntity, us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners
us-gaap:Ownership, us-gaap:PartnerTypeOfPartnersCapitalAccount
dei:LegalEntity, us-gaap:Ownership, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:MinorityInterestOwnershipPercentageByParent
us-gaap:Ownership, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:NotesPayableRelatedPartiesNoncurrent

us-gaap:PartnersCapital

us-gaap:PartnersCapitalAttributableToNoncontrollingInterest

us-gaap:PreferredUnitsPreferredPartnersCapitalAccounts

us-gaap:PrepaidExpenseCurrent

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentOther

us-gaap:RevenueRemainingPerformanceObligation
us-gaap:ProductOrService

us-gaap:UnamortizedDebtIssuanceExpense
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Balance Sheet
Operating Lease Liability
Assets
Operating Lease Right Of Use Asset
Current Assets
Accounts Receivable Net Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Other Accrued Liabilities Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Payable
OperatingLeaseLiability
Operating Lease Liability
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
 Cost Ratio shlx:AssetAcquisition shlx:April2020AcquisitionNANANA22.0NANANANANA
 Cost Ratio us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Amberjack,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▅▆▁▅▇█70.072.061.069.074.076.0NA80.074.0
 Cost Ratio us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Bengal,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▁▂▃█▄▆12.013.014.019.015.017.0NA22.019.0
 Cost Ratio us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Colonial,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▂▁▃▃▅█306.0290.0327.0319.0348.0401.0NA354.088.0
 Cost Ratio us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Explorer,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther█▁▂▂▂▄139.069.078.075.080.096.0NA122.037.0
 Cost Ratio us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Mars,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▁▄▁▆▂█58.063.058.068.061.072.0NA82.067.0
 Cost Ratio us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:OtherInvestment,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▁▆▁▁██53.056.053.053.057.057.0NA44.056.0
 Cost Ratio us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Poseidon,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▃▆█▃▁▂34.042.048.036.030.033.0NA31.034.0
 Net profit Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Amberjack,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▅▆▁▅▇█70.072.061.069.074.076.0NA80.074.0
 Net profit Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Bengal,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▁▂▃█▄▆12.013.014.019.015.017.0NA22.019.0
 Net profit Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Colonial,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▂▁▃▃▅█306.0290.0327.0319.0348.0401.0NA354.088.0
 Net profit Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Explorer,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther█▁▂▂▂▄139.069.078.075.080.096.0NA122.037.0
 Net profit Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Mars,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▁▄▁▆▂█58.063.058.068.061.072.0NA82.067.0
 Net profit Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:OtherInvestment,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▁▆▁▁██53.056.053.053.057.057.0NA44.056.0
 Net profit Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Poseidon,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▃▆█▃▁▂34.042.048.036.030.033.0NA31.034.0
 Operating Margin shlx:AssetAcquisition shlx:April2020AcquisitionNANANA22.0NANANANANA
 Operating Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Amberjack,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▅▆▁▅▇█70.072.061.069.074.076.0NA80.074.0
 Operating Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Bengal,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▁▂▃█▄▆12.013.014.019.015.017.0NA22.019.0
 Operating Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Colonial,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▂▁▃▃▅█306.0290.0327.0319.0348.0401.0NA354.088.0
 Operating Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Explorer,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther█▁▂▂▂▄139.069.078.075.080.096.0NA122.037.0
 Operating Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Mars,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▁▄▁▆▂█58.063.058.068.061.072.0NA82.067.0
 Operating Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:OtherInvestment,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▁▆▁▁██53.056.053.053.057.057.0NA44.056.0
 Operating Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee shlx:Poseidon,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther▃▆█▃▁▂34.042.048.036.030.033.0NA31.034.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
 TTM Greenblatt ROC _ _██▄▁▂▃▅▄▄65.064.048.035.041.045.053.049.048.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:ComprehensiveIncomeNetOfTax ██▃▄▅▄▄▅▁162.0163.0126.0137.0141.0138.0138.0141.0115.0
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▆▆▆▁▃▆▆█▆4.04.04.02.03.04.04.05.04.0
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ██▃▄▅▄▄▅▁166.0167.0130.0139.0144.0142.0142.0146.0119.0
us-gaap:CostsAndExpenses █▂▇▂▅▃▁▃▁83.075.082.075.079.076.073.076.073.0
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ██▃▄▅▄▅▅▁166.0167.0133.0137.0144.0142.0144.0146.0119.0
us-gaap:InterestIncomeExpenseNonoperatingNet ██▇▇▄▄▂▁█-21.0-21.0-22.0-22.0-24.0-24.0-25.0-26.0-21.0
us-gaap:InterestIncomeOperating ▇█▇█▇▁▂▁▁7.08.07.08.07.01.02.01.01.0
us-gaap:InterestPaidNet ▁▆▄▅▆▇█▆▃17.024.021.022.024.025.026.023.020.0
us-gaap:NetIncomeLoss ██▃▄▅▄▅▅▁162.0163.0129.0135.0141.0138.0140.0141.0115.0
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▆▆▆▁▃▆▆█▆4.04.04.02.03.04.04.05.04.0
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ██▁▂▃150.0151.0117.0123.0129.0NANANANA
 us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted us-gaap:PartnerTypeOfPartnersCapitalAccount shlx:LimitedPartnersCommonUnits██▁▂▃162.0163.0129.0135.0141.0NANANANA
us-gaap:NonoperatingIncomeExpense ▁█115.0116.0NA116.0120.0121.0NA123.092.0
us-gaap:OperatingCostsAndExpenses ▂▂▅▁▂▄▇█▆11.011.015.09.010.014.017.019.016.0
us-gaap:OperatingIncomeLoss ██▄▁▂▃▅▄▄65.064.048.035.041.045.053.049.048.0
us-gaap:OtherComprehensiveIncomeLossNetOfTax NANANA2.0NANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncomeNANANA2.0NANANANANA
us-gaap:OtherIncome ▁█10.014.0NA7.011.09.0NA8.012.0
us-gaap:ProfitLoss ██▃▄▅▄▅▅▁166.0167.0133.0137.0144.0142.0144.0146.0119.0
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▆▅▁▃▃▇▄▃134.0125.0116.095.0106.0107.0126.0111.0107.0
us-gaap:Revenues █▆▅▁▃▃▄▄▃148.0139.0130.0110.0120.0121.0126.0125.0121.0
us-gaap:SellingGeneralAndAdministrativeExpense ▂▄▁▅▂▅▅▄█1.02.00.03.01.03.03.02.05.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:Assets ▇▆▇██▁▂▂▁2327.02322.02347.02394.02416.01988.02019.02019.02004.0
us-gaap:Liabilities ▆▅██▆▁▂▃▂2794.02789.02805.02808.02795.02762.02768.02776.02771.0
us-gaap:LiabilitiesAndStockholdersEquity ▇▆▇██▁▂▂▁2327.02322.02347.02394.02416.01988.02019.02019.02004.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:AssetsCurrent █▆▆▆▅▃▃▃▁425.0392.0394.0396.0389.0351.0359.0351.0327.0
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▅▆▆▆▄▃▄▁353.0317.0320.0329.0332.0292.0290.0294.0257.0
us-gaap:AccountsReceivableNetCurrent ▃▄█▁▁▁▂▂▂13.014.020.010.010.010.012.012.012.0
us-gaap:Land ████▁▁▁▁█12.012.012.012.011.011.011.011.012.0
us-gaap:MachineryAndEquipmentGross ▅██▇▅▆▄▄▁1239.01260.01263.01258.01238.01245.01228.01225.01202.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
 us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:AmberjackNANA836.0NANANA804.0NANA
 us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:BengalNANA161.0NANANA157.0NANA
 us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:ColonialNANA3105.0NANANA2920.0NANA
 us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:ExplorerNANA537.0NANANA530.0NANA
 us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:MarsNANA269.0NANANA173.0NANA
 us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:MattoxNANA204.0NANANANANANA
 us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:OtherInvestmentNANA920.0NANANA917.0NANA
 us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:PoseidonNANA176.0NANANA190.0NANA
us-gaap:PropertyPlantAndEquipmentGross NANA1356.01351.01330.01329.01312.01295.01272.0
us-gaap:ConstructionInProgressGross ▁▁▁▂▃▂▄▆█7.06.04.09.019.014.027.041.057.0
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA661.0652.0639.0626.0613.0603.0591.0
us-gaap:PropertyPlantAndEquipmentNet NANA699.0708.0710.0717.0726.0733.0738.0
us-gaap:OperatingLeaseRightOfUseAsset ▁▁▁▁▁▁▁██4.04.04.04.04.04.04.05.05.0
us-gaap:OtherAssetsNoncurrent ▄▄▄▄▄▄▄▄▄2.02.02.02.02.02.02.02.02.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:AccountsPayableCurrent ▇▃▅█▅▁▅▃▅7.03.05.08.05.01.05.03.05.0
us-gaap:AccruedLiabilitiesCurrent ▄▂▁▇▅▂▂█▆15.012.010.021.017.012.012.022.018.0
us-gaap:ContractWithCustomerLiabilityCurrent NA2.04.05.05.01.00.00.00.0
 us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:MajorCustomers shlx:RelatedParties▇█▇▅▂▁▁▁▁18.022.019.014.04.01.00.00.00.0
 us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:MajorCustomers shlx:ThirdPartiesNA2.04.05.05.01.00.00.00.0
us-gaap:LiabilitiesCurrent ▆▅██▆▁▂▃▂73.067.082.085.072.040.046.054.048.0
us-gaap:OtherAccruedLiabilitiesCurrent NANA1.02.02.03.03.02.02.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:LiabilitiesNoncurrent ▁▄███▄▄▄█2721.02722.02723.02723.02723.02722.02722.02722.02723.0
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▁▁▁▁▁▁▁█4.04.04.04.04.04.04.04.05.0
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA1.0NANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA1.0NANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA5.0NANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▆▆▇▇█▁▁▁▁-467.0-467.0-458.0-414.0-379.0-774.0-749.0-757.0-767.0
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity,us-gaap:PartnerTypeOfPartnersCapitalAccount shlx:ShellPipelineCompanyLP,shlx:CommonUnitsPublic▁▁▁▁▁████-2468.0-2498.0-2497.0-2474.0-2456.0-214.0-203.0-196.0-198.0
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity,us-gaap:PartnerTypeOfPartnersCapitalAccount shlx:ShellPipelineCompanyLP,us-gaap:PreferredPartner▁▁▁▁▁██-1059.0-1059.0-1059.0-1059.0-1059.00.00.0NANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:PartnerTypeOfPartnersCapitalAccount shlx:CommonUnitsPublic▁▂▂▄▅▆▇██3363.03373.03382.03402.03421.03437.03450.03461.03458.0
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:AmberjackNANA746.0NANANA824.0NANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:BengalNANA187.0NANANA186.0NANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:ColonialNANA-147.0NANANA-149.0NANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:ExplorerNANA103.0NANANA137.0NANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:MarsNANA190.0NANANA200.0NANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:MattoxNANA205.0NANANANANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:OtherInvestmentNANA413.0NANANA435.0NANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName shlx:PoseidonNANA-41.0NANANA-42.0NANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▁▁▁█▃▃▃██-9.0-9.0-9.0-6.0-8.0-8.0-8.0-6.0-6.0
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▁▇▇▇▇████2.023.023.023.024.025.026.026.025.0
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:ReceivablesFromStockholder▁▁▁▁▁██-296.0-297.0-298.0-300.0-301.00.00.0NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▁▁█▃▃▃██-9.0-9.0-9.0-6.0-8.0-8.0-8.0-6.0-6.0
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders ▁█3.04.0NA3.04.05.0NA4.06.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▅▃▃█▄▂▆▁185.0166.0147.0149.0192.0162.0139.0175.0133.0
us-gaap:NetCashProvidedByUsedInInvestingActivities █▇▇█▇▇▅▆▁26.09.019.022.016.07.0-9.0-1.0-70.0
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▁▁▁▁▂▃▃█-175.0-178.0-175.0-174.0-168.0-167.0-134.0-137.0-32.0
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▇▂▁▂█▃▂█▇36.0-3.0-9.0-3.040.02.0-4.037.031.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:IncreaseDecreaseInAccountsPayable NA-5.0-4.0-2.016.0-3.02.0-1.02.0
us-gaap:IncreaseDecreaseInAccountsReceivable ▁█1.04.0NA6.01.03.0-3.0-7.08.0
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▅▃▃█▄▂▆▁185.0166.0147.0149.0192.0162.0139.0175.0133.0
us-gaap:NetIncomeLoss ██▃▄▅▄▅▅▁162.0163.0129.0135.0141.0138.0140.0141.0115.0
us-gaap:ProfitLoss ██▃▄▅▄▅▅▁166.0167.0133.0137.0144.0142.0144.0146.0119.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities █▇▇█▇▇▅▆▁26.09.019.022.016.07.0-9.0-1.0-70.0
us-gaap:PaymentsToAcquireProductiveAssets ▂▁▆▅▂▄▄▄█3.01.010.08.02.07.07.07.014.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▁▁▁▁▂▃▃█-175.0-178.0-175.0-174.0-168.0-167.0-134.0-137.0-32.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value162163126137141138138141115132140149111
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2314.32037.50.01712.52014.313800.00.014100.011500.00.00.00.00.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4.04.04.02.03.04.04.05.04.05.07.06.04.0
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating57.150.00.025.042.9400.00.0500.0400.00.00.00.00.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value166167130139144142142146119137147155115
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2371.42087.50.01737.52057.114200.00.014600.011900.00.00.00.00.0

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value83758275797673767366697572941095654383431333155232624271514-2.2
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating1185.7937.50.0937.51128.67600.00.07600.07300.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostsAndExpenses shlx:AssetAcquisition

shlx:April2020Acquisition


Costs
Period End2020-09-30
Value3.0
Percentage of CostsAndExpenses4.0
Percentage of InterestIncomeOperating37.5
Percentage of InterestIncomeOperating shlx:April2020Acquisition0.0

us-gaap:CostsAndExpenses us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

shlx:Amberjack, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value1917261617191817
Percentage of CostsAndExpenses22.922.731.721.321.525.023.723.3
Percentage of InterestIncomeOperating271.4212.50.0200.0242.91900.01800.01700.0
Percentage of InterestIncomeOperating shlx:Amberjack us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Bengal, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value8.07.06.09.08.07.07.09.0
Percentage of CostsAndExpenses9.69.37.312.010.19.29.212.3
Percentage of InterestIncomeOperating114.387.50.0112.5114.3700.0700.0900.0
Percentage of InterestIncomeOperating shlx:Bengal us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Colonial, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value20913315917216616319044
Percentage of CostsAndExpenses251.8177.3193.9229.3210.1214.5250.060.3
Percentage of InterestIncomeOperating2985.71662.50.02150.02371.416300.019000.04400.0
Percentage of InterestIncomeOperating shlx:Colonial us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Explorer, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value5142434243475113
Percentage of CostsAndExpenses61.456.052.456.054.461.867.117.8
Percentage of InterestIncomeOperating728.6525.00.0525.0614.34700.05100.01300.0
Percentage of InterestIncomeOperating shlx:Explorer us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Mars, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value2222262221283226
Percentage of CostsAndExpenses26.529.331.729.326.636.842.135.6
Percentage of InterestIncomeOperating314.3275.00.0275.0300.02800.03200.02600.0
Percentage of InterestIncomeOperating shlx:Mars us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:OtherInvestment, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3032323029272137
Percentage of CostsAndExpenses36.142.739.040.036.735.527.650.7
Percentage of InterestIncomeOperating428.6400.00.0375.0414.32700.02100.03700.0
Percentage of InterestIncomeOperating shlx:OtherInvestment us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Poseidon, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value9.010.010.09.08.09.09.08.0
Percentage of CostsAndExpenses10.813.312.212.010.111.811.811.0
Percentage of InterestIncomeOperating128.6125.00.0112.5114.3900.0900.0800.0
Percentage of InterestIncomeOperating shlx:Poseidon us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value166167133137144142144146119137148154115641027468737258666872744541353126155.822110.2
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2371.42087.50.01712.52057.114200.00.014600.011900.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Income Expense Nonoperating Net

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestIncomeExpenseNonoperatingNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-21000000.0-21000000.0-22000000.0-22000000.0-24000000.0-24000000.0-25000000.0-26000000.0-21000000.0-20000000.0-19600000.0-19000000.0-13300000.0-10600000.0-10200000.0-9700000.0-7500000.0-4800000.0-4500000.0-2800000.0-2000000.0-3000000.0-2100000.0-1700000.0-300000.0-200000.0
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating-300.0-262.50.0-275.0-342.9-2400.00.0-2600.0-2100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Income Operating

us-gaap:InterestIncomeOperating

us-gaap:InterestIncomeOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value7.08.07.08.07.01.02.01.01.0
Percentage of InterestIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1724212224252623202018168.0118.29.0
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating242.9300.0300.0275.0342.92500.01300.02300.02000.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-09-30
Value16216312913514113814014111513214114811064867265706956635557543223133122
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2314.32037.51842.91687.52014.313800.07000.014100.011500.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4.04.04.02.03.04.04.05.04.05.06.95.94.70.8121.92.22.22.82.52.51215201317
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating57.150.057.125.042.9400.0200.0500.0400.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value150151117123129
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2142.91887.51671.41537.51842.9

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:LimitedPartnersCommonUnits


Net
Period End2020-12-312020-09-302020-06-30
Value117123129
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0
Percentage of InterestIncomeOperating1671.41537.51842.9
Percentage of InterestIncomeOperating shlx:LimitedPartnersCommonUnits0.00.00.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

shlx:LimitedPartnersCommonUnits


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value162163129135141
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2314.32037.51842.91687.52014.3
Percentage of InterestIncomeOperating shlx:LimitedPartnersCommonUnits0.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value11511611612012112392929572704654568425
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating1642.91450.01450.01714.312100.012300.09200.00.00.00.00.00.00.00.00.00.0

Operating Costs And Expenses

us-gaap:OperatingCostsAndExpenses

us-gaap:OperatingCostsAndExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value1111159.010.0141719161318202443392522121311129.4229.27.76.9124.43.811
Percentage of OperatingCostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating157.1137.5214.3112.5142.91400.0850.01900.01600.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value656448354145534948657277564.995383231413638458948312728315.822
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating928.6800.0685.7437.5585.74500.02650.04900.04800.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss shlx:AssetAcquisition

shlx:April2020Acquisition


Operating
Period End2020-09-30
Value19
Percentage of OperatingIncomeLoss54.3
Percentage of InterestIncomeOperating237.5
Percentage of InterestIncomeOperating shlx:April2020Acquisition0.0

us-gaap:OperatingIncomeLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

shlx:Amberjack, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value5155355357576257
Percentage of OperatingIncomeLoss78.585.972.9151.4139.0126.7126.5118.8
Percentage of InterestIncomeOperating728.6687.5500.0662.5814.35700.06200.05700.0
Percentage of InterestIncomeOperating shlx:Amberjack us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Bengal, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value4.06.08.010.07.010.01510.0
Percentage of OperatingIncomeLoss6.29.416.728.617.122.230.620.8
Percentage of InterestIncomeOperating57.175.0114.3125.0100.01000.01500.01000.0
Percentage of InterestIncomeOperating shlx:Bengal us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Colonial, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value9715716814718223816444
Percentage of OperatingIncomeLoss149.2245.3350.0420.0443.9528.9334.791.7
Percentage of InterestIncomeOperating1385.71962.52400.01837.52600.023800.016400.04400.0
Percentage of InterestIncomeOperating shlx:Colonial us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Explorer, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value8827353337497124
Percentage of OperatingIncomeLoss135.442.272.994.390.2108.9144.950.0
Percentage of InterestIncomeOperating1257.1337.5500.0412.5528.64900.07100.02400.0
Percentage of InterestIncomeOperating shlx:Explorer us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Mars, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3641324640445041
Percentage of OperatingIncomeLoss55.464.166.7131.497.697.8102.085.4
Percentage of InterestIncomeOperating514.3512.5457.1575.0571.44400.05000.04100.0
Percentage of InterestIncomeOperating shlx:Mars us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:OtherInvestment, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value2324212328302319
Percentage of OperatingIncomeLoss35.437.543.865.768.366.746.939.6
Percentage of InterestIncomeOperating328.6300.0300.0287.5400.03000.02300.01900.0
Percentage of InterestIncomeOperating shlx:OtherInvestment us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Poseidon, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value2532382722242226
Percentage of OperatingIncomeLoss38.550.079.277.153.753.344.954.2
Percentage of InterestIncomeOperating357.1400.0542.9337.5314.32400.02200.02600.0
Percentage of InterestIncomeOperating shlx:Poseidon us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2020-09-30
Value2000000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0
Percentage of InterestIncomeOperating25.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2020-09-30
Value2000000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0
Percentage of InterestIncomeOperating25.0
Percentage of InterestIncomeOperating us-gaap:AccumulatedOtherComprehensiveIncome0.0

Other Income

us-gaap:OtherIncome

us-gaap:OtherIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302015-09-302015-06-30
Value10.0147.0119.08.0128.07.8105.40.10.00.00.00.00.11.0
Percentage of OtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0
Percentage of InterestIncomeOperating142.9175.087.5157.1900.0800.01200.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value166167133137144142144146119137148154115641027468737258666872744541353126155.722110.2
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2371.42087.51900.01712.52057.114200.07200.014600.011900.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:ShellPipelineCompanyLP, shlx:CommonUnitsPublic


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value10310385883949404745503616312525297.25.97.26.97.98.02.1
Percentage of ProfitLoss62.061.762.061.127.533.633.634.330.632.431.224.830.534.837.440.310.010.010.910.110.910.85.9
Percentage of InterestIncomeOperating1471.41287.51062.51257.13900.04900.04000.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:ShellPipelineCompanyLP shlx:CommonUnitsPublic0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:CommonUnitsPublic


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value474838414456455856624320342925292924282321194.5
Percentage of ProfitLoss28.328.727.728.531.038.437.842.337.840.237.332.333.739.137.140.141.242.343.634.729.826.612.6
Percentage of InterestIncomeOperating671.4600.0475.0585.74400.05600.04500.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:CommonUnitsPublic0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

shlx:Amberjack, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value5055345456576258
Percentage of ProfitLoss30.132.925.639.438.940.142.548.7
Percentage of InterestIncomeOperating714.3687.5485.7675.0800.05700.06200.05800.0
Percentage of InterestIncomeOperating shlx:Amberjack us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Bengal, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value4.06.08.010.07.010.01510.0
Percentage of ProfitLoss2.43.66.07.34.97.010.38.4
Percentage of InterestIncomeOperating57.175.0114.3125.0100.01000.01500.01000.0
Percentage of InterestIncomeOperating shlx:Bengal us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Colonial, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value4597998911616910927
Percentage of ProfitLoss27.158.174.465.080.6119.074.722.7
Percentage of InterestIncomeOperating642.91212.51414.31112.51657.116900.010900.02700.0
Percentage of InterestIncomeOperating shlx:Colonial us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Explorer, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value6721282528385518
Percentage of ProfitLoss40.412.621.118.219.426.837.715.1
Percentage of InterestIncomeOperating957.1262.5400.0312.5400.03800.05500.01800.0
Percentage of InterestIncomeOperating shlx:Explorer us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Mars, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3641334640445042
Percentage of ProfitLoss21.724.624.833.627.831.034.235.3
Percentage of InterestIncomeOperating514.3512.5471.4575.0571.44400.05000.04200.0
Percentage of InterestIncomeOperating shlx:Mars us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:OtherInvestment, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value2123202023252117
Percentage of ProfitLoss12.713.815.014.616.017.614.414.3
Percentage of InterestIncomeOperating300.0287.5285.7250.0328.62500.02100.01700.0
Percentage of InterestIncomeOperating shlx:OtherInvestment us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Poseidon, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value2431372620222023
Percentage of ProfitLoss14.518.627.819.013.915.513.719.3
Percentage of InterestIncomeOperating342.9387.5528.6325.0285.72200.02000.02300.0
Percentage of InterestIncomeOperating shlx:Poseidon us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value4.04.02.03.04.05.04.05.06.96.04.00.8121.92.22.22.82.52.512152011
Percentage of ProfitLoss2.42.41.52.12.83.43.43.64.73.93.51.212.62.63.23.03.94.33.818.721.427.032.0
Percentage of InterestIncomeOperating57.150.025.042.9400.0500.0400.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value134125116951061071261111071171421391158512694867075677176847257515546433620202626
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating1914.31562.51657.11187.51514.310700.06300.011100.010700.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MajorCustomers, us-gaap:ProductOrService

shlx:RelatedParties, shlx:ProductRevenue


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value9.06.05.05.02.07.09.010.06.010.04.3141.77.90.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.74.84.35.31.96.57.19.05.68.53.010.51.59.20.00.00.0
Percentage of InterestIncomeOperating128.675.071.462.528.6700.0450.01000.0600.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:RelatedParties shlx:ProductRevenue0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:RelatedParties, shlx:StorageServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.02.02.02.02.02.02.01.02.02.01.82.11.51.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.61.72.11.91.91.60.91.91.71.31.51.31.5
Percentage of InterestIncomeOperating28.625.028.625.028.6200.0100.0100.0200.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:RelatedParties shlx:StorageServices0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:RelatedParties, shlx:TerminalingServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3130303130121212111211111111
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.124.025.932.628.311.29.510.810.310.38.18.29.913.3
Percentage of InterestIncomeOperating442.9375.0428.6387.5428.61200.0600.01200.01100.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:RelatedParties shlx:TerminalingServices0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:RelatedParties, shlx:TerminalingServicesMajorMaintenance


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value2.02.03.00.04.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.62.60.03.80.0
Percentage of InterestIncomeOperating28.625.042.90.057.10.0
Percentage of InterestIncomeOperating shlx:RelatedParties shlx:TerminalingServicesMajorMaintenance0.00.00.00.00.00.0

shlx:RelatedParties, shlx:TransportationServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5144373141555455515051524230
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.135.231.932.638.751.442.949.547.742.736.137.336.635.7
Percentage of InterestIncomeOperating728.6550.0528.6387.5585.75500.02700.05500.05100.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:RelatedParties shlx:TransportationServices0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:RelatedParties, shlx:TransportationServicesNonleaseService


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.01.03.02.01.01.01.02.01.01.01.41.21.21.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.82.62.10.90.90.81.80.90.91.00.91.01.4
Percentage of InterestIncomeOperating14.312.542.925.014.3100.050.0200.0100.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:RelatedParties shlx:TransportationServicesNonleaseService0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:RelatedParties, shlx:TransportationTerminalingandStorageServices


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value86786477696864646555434739
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.262.467.472.664.561.359.854.747.047.850.150.045.5
Percentage of InterestIncomeOperating1228.6975.0800.01100.06900.06800.06400.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:RelatedParties shlx:TransportationTerminalingandStorageServices0.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:ThirdParties, shlx:StorageServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.02.03.02.02.02.03.02.02.02.02.11.82.32.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.62.62.11.91.92.41.81.91.71.51.32.02.7
Percentage of InterestIncomeOperating28.625.042.925.028.6200.0150.0200.0200.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:ThirdParties shlx:StorageServices0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:ThirdParties, shlx:TransportationServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3739362425293131324057565432
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.631.231.025.323.627.124.627.929.934.240.140.747.537.6
Percentage of InterestIncomeOperating528.6487.5514.3300.0357.12900.01550.03100.03200.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:ThirdParties shlx:TransportationServices0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:ThirdParties, shlx:TransportationTerminalingandStorageServices


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value39412627313334425857355759
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.132.827.425.529.029.731.835.942.049.540.860.968.8
Percentage of InterestIncomeOperating557.1512.5325.0385.73100.03300.03400.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:ThirdParties shlx:TransportationTerminalingandStorageServices0.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1481391301101201211261251211311421531299912694867075677176847257515546433620202626
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2114.31737.51857.11375.01714.312100.06300.012500.012100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Revenues shlx:AssetAcquisition

shlx:April2020Acquisition


Revenuesshlx:
Period End2020-09-30
Value22
Percentage of Revenues20.0
Percentage of InterestIncomeOperating275.0
Percentage of InterestIncomeOperating shlx:April2020Acquisition0.0

us-gaap:Revenues us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

shlx:Amberjack, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value7072616974768074
Percentage of Revenues47.351.846.962.761.762.864.061.2
Percentage of InterestIncomeOperating1000.0900.0871.4862.51057.17600.08000.07400.0
Percentage of InterestIncomeOperating shlx:Amberjack us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Bengal, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value1213141915172219
Percentage of Revenues8.19.410.817.312.514.017.615.7
Percentage of InterestIncomeOperating171.4162.5200.0237.5214.31700.02200.01900.0
Percentage of InterestIncomeOperating shlx:Bengal us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Colonial, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value30629032731934840135488
Percentage of Revenues206.8208.6251.5290.0290.0331.4283.272.7
Percentage of InterestIncomeOperating4371.43625.04671.43987.54971.440100.035400.08800.0
Percentage of InterestIncomeOperating shlx:Colonial us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Explorer, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value139697875809612237
Percentage of Revenues93.949.660.068.266.779.397.630.6
Percentage of InterestIncomeOperating1985.7862.51114.3937.51142.99600.012200.03700.0
Percentage of InterestIncomeOperating shlx:Explorer us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Mars, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value5863586861728267
Percentage of Revenues39.245.344.661.850.859.565.655.4
Percentage of InterestIncomeOperating828.6787.5828.6850.0871.47200.08200.06700.0
Percentage of InterestIncomeOperating shlx:Mars us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:OtherInvestment, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value5356535357574456
Percentage of Revenues35.840.340.848.247.547.135.246.3
Percentage of InterestIncomeOperating757.1700.0757.1662.5814.35700.04400.05600.0
Percentage of InterestIncomeOperating shlx:OtherInvestment us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Poseidon, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3442483630333134
Percentage of Revenues23.030.236.932.725.027.324.828.1
Percentage of InterestIncomeOperating485.7525.0685.7450.0428.63300.03100.03400.0
Percentage of InterestIncomeOperating shlx:Poseidon us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value1.02.00.03.01.03.03.02.05.01.02.51.22.21.94.51.02.81.61.92.21.92.13.61.63.41.61.40.30.70.1
Percentage of SellingGeneralAndAdministrativeExpense100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating14.325.00.037.514.3300.0150.0200.0500.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value23272322234723942416198820192019200419151913189818701387136611161098898865797783752715608575618623320252
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Amberjack


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-31
Value880860892
Percentage of Assets37.542.646.6
Percentage of Assets37.542.646.6
Percentage of Assets shlx:Amberjack100.0100.0100.0

shlx:Bengal


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-31
Value194192183
Percentage of Assets8.39.59.6
Percentage of Assets8.39.59.6
Percentage of Assets shlx:Bengal100.0100.0100.0

shlx:Colonial


Assetsus-gaap:
Period End2020-12-312019-12-31
Value36063243
Percentage of Assets153.6160.6
Percentage of Assets153.6160.6
Percentage of Assets shlx:Colonial100.0100.0

shlx:Explorer


Assetsus-gaap:
Period End2020-12-312019-12-31
Value611623
Percentage of Assets26.030.9
Percentage of Assets26.030.9
Percentage of Assets shlx:Explorer100.0100.0

shlx:Mars


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-31
Value316230231
Percentage of Assets13.511.412.1
Percentage of Assets13.511.412.1
Percentage of Assets shlx:Mars100.0100.0100.0

shlx:Mattox


Assetsus-gaap:
Period End2020-12-31
Value217
Percentage of Assets9.2
Percentage of Assets9.2
Percentage of Assets shlx:Mattox100.0

shlx:OtherInvestment


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-31
Value955977926
Percentage of Assets40.748.448.4
Percentage of Assets40.748.448.4
Percentage of Assets shlx:OtherInvestment100.0100.0100.0

shlx:Poseidon


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-31
Value207220222
Percentage of Assets8.810.911.6
Percentage of Assets8.810.911.6
Percentage of Assets shlx:Poseidon100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value279427892805280827952762276827762771216921702181219197719321092135176174539639096508452130374437
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets120.1120.1119.5117.3115.7138.9137.1137.5138.3113.3113.4114.9117.270.4141.497.8123.084.786.149.849.912.871.174.322.76.17.214.9

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value23272322234723942416198820192019200419151913189818701387136611161098898865797783752715608575618623320252
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Amberjack


Liabilities
Period End2020-12-312019-12-312018-12-31
Value880860892
Percentage of LiabilitiesAndStockholdersEquity37.542.646.6
Percentage of Assets37.542.646.6
Percentage of Assets shlx:Amberjack100.0100.0100.0

shlx:Bengal


Liabilities
Period End2020-12-312019-12-312018-12-31
Value194192183
Percentage of LiabilitiesAndStockholdersEquity8.39.59.6
Percentage of Assets8.39.59.6
Percentage of Assets shlx:Bengal100.0100.0100.0

shlx:Colonial


Liabilities
Period End2020-12-312019-12-31
Value36063243
Percentage of LiabilitiesAndStockholdersEquity153.6160.6
Percentage of Assets153.6160.6
Percentage of Assets shlx:Colonial100.0100.0

shlx:Explorer


Liabilities
Period End2020-12-312019-12-31
Value611623
Percentage of LiabilitiesAndStockholdersEquity26.030.9
Percentage of Assets26.030.9
Percentage of Assets shlx:Explorer100.0100.0

shlx:Mars


Liabilities
Period End2020-12-312019-12-312018-12-31
Value316230231
Percentage of LiabilitiesAndStockholdersEquity13.511.412.1
Percentage of Assets13.511.412.1
Percentage of Assets shlx:Mars100.0100.0100.0

shlx:Mattox


Liabilities
Period End2020-12-31
Value217
Percentage of LiabilitiesAndStockholdersEquity9.2
Percentage of Assets9.2
Percentage of Assets shlx:Mattox100.0

shlx:OtherInvestment


Liabilities
Period End2020-12-312019-12-312018-12-31
Value955977926
Percentage of LiabilitiesAndStockholdersEquity40.748.448.4
Percentage of Assets40.748.448.4
Percentage of Assets shlx:OtherInvestment100.0100.0100.0

shlx:Poseidon


Liabilities
Period End2020-12-312019-12-312018-12-31
Value207220222
Percentage of LiabilitiesAndStockholdersEquity8.810.911.6
Percentage of Assets8.810.911.6
Percentage of Assets shlx:Poseidon100.0100.0100.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value4253923943963893513593513272912832702432372032121881981651891991721301431401831835128
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.316.916.816.516.117.717.817.416.315.214.814.313.017.114.919.117.222.119.123.825.522.918.323.624.429.629.516.111.4

us-gaap:AssetsCurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Amberjack


Assets
Period End2020-12-312019-12-312018-12-31
Value445646
Percentage of AssetsCurrent11.215.616.2
Percentage of Assets1.92.82.4
Percentage of Assets shlx:Amberjack5.06.55.2

shlx:Bengal


Assets
Period End2020-12-312019-12-312018-12-31
Value333527
Percentage of AssetsCurrent8.49.79.5
Percentage of Assets1.41.71.4
Percentage of Assets shlx:Bengal17.018.214.8

shlx:Colonial


Assets
Period End2020-12-312019-12-31
Value501323
Percentage of AssetsCurrent127.290.0
Percentage of Assets21.316.0
Percentage of Assets shlx:Colonial13.910.0

shlx:Explorer


Assets
Period End2020-12-312019-12-31
Value7493
Percentage of AssetsCurrent18.825.9
Percentage of Assets3.24.6
Percentage of Assets shlx:Explorer12.114.9

shlx:Mars


Assets
Period End2020-12-312019-12-312018-12-31
Value475753
Percentage of AssetsCurrent11.915.918.7
Percentage of Assets2.02.82.8
Percentage of Assets shlx:Mars14.924.822.9

shlx:Mattox


Assets
Period End2020-12-31
Value13
Percentage of AssetsCurrent3.3
Percentage of Assets0.6
Percentage of Assets shlx:Mattox6.0

shlx:OtherInvestment


Assets
Period End2020-12-312019-12-312018-12-31
Value356050
Percentage of AssetsCurrent8.916.717.6
Percentage of Assets1.53.02.6
Percentage of Assets shlx:OtherInvestment3.76.15.4

shlx:Poseidon


Assets
Period End2020-12-312019-12-312018-12-31
Value313019
Percentage of AssetsCurrent7.98.46.7
Percentage of Assets1.31.51.0
Percentage of Assets shlx:Poseidon15.013.68.6

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value353317320329332292290294257226208200175138123
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.213.713.613.713.714.714.414.612.811.810.910.59.410.114.2

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value13142010.010.010.0121212141818198.0171217161813171818161416168.84.8
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.90.40.40.50.60.60.60.71.01.01.10.61.31.21.61.82.11.72.32.52.62.72.62.62.62.71.9

us-gaap:AccountsReceivableNetCurrent us-gaap:MajorCustomers

shlx:RelatedParties


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-01
Value252318272727242533222128171418
Percentage of AccountsReceivableNetCurrent192.3164.390.0270.0270.0270.0200.0208.3275.0157.1113.8156.587.4178.80.0
Percentage of Assets1.11.00.81.11.11.41.21.21.61.11.11.50.91.00.0
Percentage of Assets shlx:RelatedParties0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:ThirdParties


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-01
Value11121910.010.010.0111312141818197.917
Percentage of AccountsReceivableNetCurrent84.685.795.0100.0100.0100.091.7108.3100.0100.0100.0100.099.598.80.0
Percentage of Assets0.50.50.80.40.40.50.50.60.60.71.01.01.10.60.0
Percentage of Assets shlx:ThirdParties0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Land

us-gaap:Land

us-gaap:Land


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1212121211111111121211118.28.28.22.02.01.41.41.41.41.41.41.41.41.41.11.10.7
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.50.50.50.60.50.50.60.60.60.60.40.60.60.20.20.20.20.20.20.20.20.20.20.20.20.30.3

Machinery And Equipment Gross

us-gaap:MachineryAndEquipmentGross

us-gaap:MachineryAndEquipmentGross


Machinery
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value123912601263125812381245122812251202119611621164115511551153888899591589578572572572328320320313294257
Percentage of MachineryAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets53.254.353.852.551.262.660.860.760.062.560.761.361.883.384.479.581.965.868.172.673.176.080.053.955.751.850.391.8101.9

Assets Noncurrent

us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:AssetsNoncurrent

shlx:Amberjack


Assets
Period End2020-12-312019-12-312018-12-31
Value836804846
Percentage of AssetsNoncurrent100.0100.0100.0
Percentage of Assets35.639.844.2
Percentage of Assets shlx:Amberjack95.093.594.8

shlx:Bengal


Assets
Period End2020-12-312019-12-312018-12-31
Value161157156
Percentage of AssetsNoncurrent19.319.518.4
Percentage of Assets6.97.88.2
Percentage of Assets shlx:Bengal83.081.885.2

shlx:Colonial


Assets
Period End2020-12-312019-12-31
Value31052920
Percentage of AssetsNoncurrent371.4363.2
Percentage of Assets132.3144.6
Percentage of Assets shlx:Colonial86.190.0

shlx:Explorer


Assets
Period End2020-12-312019-12-31
Value537530
Percentage of AssetsNoncurrent64.265.9
Percentage of Assets22.926.3
Percentage of Assets shlx:Explorer87.985.1

shlx:Mars


Assets
Period End2020-12-312019-12-312018-12-31
Value269173178
Percentage of AssetsNoncurrent32.221.521.0
Percentage of Assets11.58.69.3
Percentage of Assets shlx:Mars85.175.277.1

shlx:Mattox


Assets
Period End2020-12-31
Value204
Percentage of AssetsNoncurrent24.4
Percentage of Assets8.7
Percentage of Assets shlx:Mattox94.0

shlx:OtherInvestment


Assets
Period End2020-12-312019-12-312018-12-31
Value920917876
Percentage of AssetsNoncurrent110.0114.1103.5
Percentage of Assets39.245.445.8
Percentage of Assets shlx:OtherInvestment96.393.994.6

shlx:Poseidon


Assets
Period End2020-12-312019-12-312018-12-31
Value176190203
Percentage of AssetsNoncurrent21.123.624.0
Percentage of Assets7.59.410.6
Percentage of Assets shlx:Poseidon85.086.491.4

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1356135113301329131212951272126612301233122012201218942949620617605599599598345337337330309271
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets57.856.455.066.965.064.163.566.164.364.965.387.989.284.486.469.071.376.076.579.683.756.858.754.653.096.4107.5

Construction In Progress Gross

us-gaap:ConstructionInProgressGross

us-gaap:ConstructionInProgressGross


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value7.06.04.09.0191427415753797369564434372920232315103.18.66.110237.2
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.20.40.80.71.32.02.82.84.13.93.74.13.23.13.43.32.33.02.92.01.40.51.51.01.77.32.9

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value661652639626613603591579567562548537526368372245239233227222216777369666354
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.227.226.431.530.429.929.530.229.629.629.338.738.533.033.927.327.729.329.129.530.212.612.811.310.719.721.7

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value699708710717726733738740742743741739736608614403398395394392392271272273275269223
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.829.629.436.136.036.336.838.638.839.239.653.353.954.555.944.946.049.650.452.154.944.747.444.344.183.988.6

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4000000.04000000.04000000.04000000.04000000.04000000.04000000.05000000.05000000.05000000.00
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.30.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value2.02.02.02.02.02.02.02.02.03.02.52.62.62.61.71.30.6393937116.26.86.86.94.24.20.0
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.20.10.10.10.20.10.10.14.44.64.71.50.81.01.11.20.70.70.0

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value7.03.05.08.05.01.05.03.05.07.04.04.54.4114.02.53.60.81.51.52.61.40.20.20.50.10.00.18.4
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0
Percentage of Assets0.30.10.20.30.20.10.20.10.20.40.20.20.20.80.30.20.30.10.20.20.30.20.00.00.10.00.00.03.3

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value151210.02117121222181213182633121713125.67.96.86.36.811104.10.92.229
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.50.40.90.70.60.61.10.90.60.71.01.42.40.91.51.21.40.61.00.90.81.01.81.80.70.10.711.6

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.04.05.05.01.00.00.00.01.08.06.34.84.35.5
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.20.20.10.00.00.00.10.40.30.30.30.4

us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:MajorCustomers

shlx:RelatedParties


Contract
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
Value182219144.01.00.00.00.01.02.64.36.78.513
Percentage of ContractWithCustomerLiabilityCurrent0.01100.0475.0280.080.0100.00.00.00.0100.032.568.3139.6197.7252.7
Percentage of Assets0.80.90.80.60.20.10.00.00.00.10.10.20.40.61.0
Percentage of Assets shlx:RelatedParties0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:ThirdParties


Contract
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.04.05.05.01.00.00.00.01.08.06.34.84.35.5
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.20.20.10.00.00.00.10.40.30.30.30.4
Percentage of Assets shlx:ThirdParties0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value736782857240465448455258667254635747312620232645213037441737
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.12.93.53.63.02.02.32.72.42.32.73.13.65.24.05.75.25.33.63.32.63.13.674.322.76.17.25.414.9

us-gaap:LiabilitiesCurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Amberjack


Liabilities
Period End2020-12-312019-12-312018-12-31
Value10.04.04.0
Percentage of LiabilitiesCurrent12.28.77.7
Percentage of Assets0.40.20.2
Percentage of Assets shlx:Amberjack1.10.50.4

shlx:Bengal


Liabilities
Period End2020-12-312019-12-312018-12-31
Value7.06.09.0
Percentage of LiabilitiesCurrent8.513.017.2
Percentage of Assets0.30.30.5
Percentage of Assets shlx:Bengal3.63.14.9

shlx:Colonial


Liabilities
Period End2020-12-312019-12-31
Value245519
Percentage of LiabilitiesCurrent298.81128.3
Percentage of Assets10.425.7
Percentage of Assets shlx:Colonial6.816.0

shlx:Explorer


Liabilities
Period End2020-12-312019-12-31
Value4944
Percentage of LiabilitiesCurrent59.895.7
Percentage of Assets2.12.2
Percentage of Assets shlx:Explorer8.07.1

shlx:Mars


Liabilities
Period End2020-12-312019-12-312018-12-31
Value238.05.0
Percentage of LiabilitiesCurrent28.017.49.6
Percentage of Assets1.00.40.3
Percentage of Assets shlx:Mars7.33.52.2

shlx:OtherInvestment


Liabilities
Period End2020-12-312019-12-312018-12-31
Value567365
Percentage of LiabilitiesCurrent68.3158.7124.5
Percentage of Assets2.43.63.4
Percentage of Assets shlx:OtherInvestment5.97.57.0

shlx:Poseidon


Liabilities
Period End2020-12-312019-12-312018-12-31
Value10.01616
Percentage of LiabilitiesCurrent12.234.830.7
Percentage of Assets0.40.80.8
Percentage of Assets shlx:Poseidon4.87.37.2

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1000000.02000000.02000000.03000000.03000000.02000000.02000000.02000000.02400000.01900000.02200000.03000000.02500000.01700000.02500000.0700000.01200000.0100000.01900000.0800000.0600000.04000000.03300000.0500000.0100000.0900000.01500000.0
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.10.20.10.10.10.10.10.10.10.20.20.20.20.10.10.00.20.10.10.70.60.10.00.30.6

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LiabilitiesNoncurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value2721272227232723272327222722272227232124211821232124904187710291294713714370370724821.3
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets116.9117.2116.0113.7112.7136.9134.8134.8135.9110.9110.7111.8113.665.2137.492.2117.879.482.546.547.39.767.40.2

us-gaap:LiabilitiesNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Amberjack


Liabilities
Period End2020-12-312019-12-312018-12-31
Value124324.0
Percentage of LiabilitiesNoncurrent4.61.20.2
Percentage of Assets5.31.60.2
Percentage of Assets shlx:Amberjack14.13.70.4

shlx:Colonial


Liabilities
Period End2020-12-312019-12-31
Value35082873
Percentage of LiabilitiesNoncurrent128.8105.5
Percentage of Assets149.5142.3
Percentage of Assets shlx:Colonial97.388.6

shlx:Explorer


Liabilities
Period End2020-12-312019-12-31
Value459442
Percentage of LiabilitiesNoncurrent16.916.2
Percentage of Assets19.621.9
Percentage of Assets shlx:Explorer75.170.9

shlx:Mars


Liabilities
Period End2020-12-312019-12-312018-12-31
Value1032218
Percentage of LiabilitiesNoncurrent3.80.80.8
Percentage of Assets4.41.10.9
Percentage of Assets shlx:Mars32.69.67.8

shlx:Mattox


Liabilities
Period End2020-12-31
Value12
Percentage of LiabilitiesNoncurrent0.4
Percentage of Assets0.5
Percentage of Assets shlx:Mattox5.5

shlx:OtherInvestment


Liabilities
Period End2020-12-312019-12-312018-12-31
Value486469456
Percentage of LiabilitiesNoncurrent17.817.221.5
Percentage of Assets20.723.223.8
Percentage of Assets shlx:OtherInvestment50.948.049.2

shlx:Poseidon


Liabilities
Period End2020-12-312019-12-312018-12-31
Value238246243
Percentage of LiabilitiesNoncurrent8.79.011.5
Percentage of Assets10.112.212.7
Percentage of Assets shlx:Poseidon115.0111.8109.5

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.05000000.05000000.00
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.30.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value1000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value1000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value5000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.2

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value4000000.04000000.05000000.05000000.05000000.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.3

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value7000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value3000000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.1

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-11-022013-12-312012-12-312011-12-31
Value-467.0-467.0-458.0-414.0-379.0-774.0-749.0-757.0-767.0-254.0-257.0-283.2-320.8410-565.924-252.5137119400392656207156444580578320214118118
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-20.1-20.1-19.5-17.3-15.7-38.9-37.1-37.5-38.3-13.3-13.4-14.9-17.229.6-41.42.2-23.015.313.950.250.187.228.925.777.393.992.80.085.10.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:ShellPipelineCompanyLP, shlx:CommonUnitsPublic


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value-2468.0-2498.0-2497.0-2474.0-2456.0-214.0-203.0-196.0-198.0-196.0-198.0-205.1-219.0-219.7-507.2-510.2-509.1-508.9-124.1-125.6-126.1-128.2-130.4-133.9-137.8-138.8-140.30.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest528.5534.9545.2597.6648.027.627.125.925.877.277.072.468.3-53.589.6-2108.3201.6-370.1-103.5-31.4-32.2-19.5-63.0-85.4-31.0-23.9-24.20.0
Percentage of Assets-106.1-107.6-106.4-103.3-101.7-10.8-10.1-9.7-9.9-10.2-10.3-10.8-11.7-15.8-37.1-45.7-46.3-56.6-14.3-15.8-16.1-17.0-18.2-22.0-24.0-22.4-22.50.0
Percentage of Assets shlx:ShellPipelineCompanyLP shlx:CommonUnitsPublic0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:ShellPipelineCompanyLP, us-gaap:PreferredPartner


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-1059.0-1059.0-1059.0-1059.0-1059.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest226.8226.8231.2255.8279.4-0.0-0.0
Percentage of Assets-45.5-45.6-45.1-44.2-43.80.00.0
Percentage of Assets shlx:ShellPipelineCompanyLP us-gaap:PreferredPartner0.00.00.00.00.00.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:CommonUnitsPublic


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value3363337333823402342134373450346134583464345934503433343327732770249324902485247924762067163713301320101910160.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-720.1-722.3-738.4-821.7-902.6-444.1-460.6-457.2-450.8-1363.8-1346.0-1218.4-1070.4836.8-490.111447.9-987.41811.32073.1619.2631.4314.9790.7849.0297.1175.5175.50.0
Percentage of Assets144.5145.3144.1142.1141.6172.9170.9171.4172.6180.9180.8181.7183.6247.4203.0248.1226.9277.1287.2311.0316.2274.7228.9218.6229.7164.9162.90.0
Percentage of Assets shlx:CommonUnitsPublic0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Amberjack


Stockholders
Period End2020-12-312019-12-312018-12-31
Value746824884
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-162.9-110.0-344.0
Percentage of Assets31.840.846.2
Percentage of Assets shlx:Amberjack84.895.899.1

shlx:Bengal


Stockholders
Period End2020-12-312019-12-312018-12-31
Value187186174
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-40.8-24.8-67.7
Percentage of Assets8.09.29.1
Percentage of Assets shlx:Bengal96.496.995.1

shlx:Colonial


Stockholders
Period End2020-12-312019-12-31
Value-147.0-149.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest32.119.9
Percentage of Assets-6.3-7.4
Percentage of Assets shlx:Colonial-4.1-4.6

shlx:Explorer


Stockholders
Period End2020-12-312019-12-31
Value103137
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-22.5-18.3
Percentage of Assets4.46.8
Percentage of Assets shlx:Explorer16.922.0

shlx:Mars


Stockholders
Period End2020-12-312019-12-312018-12-31
Value190200208
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-41.5-26.7-80.9
Percentage of Assets8.19.910.9
Percentage of Assets shlx:Mars60.187.090.0

shlx:Mattox


Stockholders
Period End2020-12-31
Value205
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-44.8
Percentage of Assets8.7
Percentage of Assets shlx:Mattox94.5

shlx:OtherInvestment


Stockholders
Period End2020-12-312019-12-312018-12-31
Value413435405
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-90.2-58.1-157.6
Percentage of Assets17.621.521.2
Percentage of Assets shlx:OtherInvestment43.244.543.7

shlx:Poseidon


Stockholders
Period End2020-12-312019-12-312018-12-31
Value-41.0-42.0-37.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest9.05.614.4
Percentage of Assets-1.7-2.1-1.9
Percentage of Assets shlx:Poseidon-19.8-19.1-16.7

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value-9.0-9.0-9.0-6.0-8.0-8.0-8.0-6.0-6.00.00.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest1.91.92.01.42.11.01.10.80.8-0.0-0.0-0.00.0
Percentage of Assets-0.4-0.4-0.4-0.3-0.3-0.4-0.4-0.3-0.30.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value2.02323232425262625272523222223202020212222108108104991541610.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.4-4.9-5.0-5.6-6.3-3.2-3.5-3.4-3.3-10.6-9.9-8.4-7.05.5-4.186.0-8.315.018.05.55.716.652.366.422.326.628.00.0
Percentage of Assets0.11.01.01.01.01.31.31.31.21.41.31.31.21.61.71.91.92.32.52.82.814.415.217.117.225.026.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReceivablesFromStockholder


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-296.0-297.0-298.0-300.0-301.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest63.463.665.172.579.4-0.0-0.0
Percentage of Assets-12.7-12.8-12.7-12.5-12.50.00.0
Percentage of Assets us-gaap:ReceivablesFromStockholder0.00.00.00.00.00.00.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value-9000000.0-9000000.0-9000000.0-6000000.0-8000000.0-8000000.0-8000000.0-6000000.0-6000000.00
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets-0.4-0.4-0.4-0.3-0.3-0.4-0.4-0.3-0.30.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3.04.03.04.05.04.06.03.05.04.02.0
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3.04.03.04.05.04.06.03.05.04.02.0
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value18516614714919216213917513315014015410410915610081936873787258876472
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2642.92075.02100.01862.52742.916200.06950.017500.013300.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value269.01922167.0-9.0-1.0-70.0-7.0-10.6-11.6-489.81.7-286.4-0.8-221.0-0.9-96.4-32.2-98.9-0.6-96.6-37.9-55.3-11.3
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating371.4112.5271.4275.0228.6700.0-450.0-100.0-7000.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-175.0-178.0-175.0-174.0-168.0-167.0-134.0-137.0-32.0-125.0-121.7-118.2375-63.795-63.4120-59.9-11.4-49.051-26.813-44.6-52.8-54.6
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating-2500.0-2225.0-2500.0-2175.0-2400.0-16700.0-6700.0-13700.0-3200.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value36-3.0-9.0-3.0402.0-4.03731188.025
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating514.3-37.5-128.6-37.5571.4200.0-200.03700.03100.00.00.00.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value-5.0-4.0-2.016-3.02.0-1.02.0-1.0-1.6-6.6-3.85.14.7-1.65.3-0.10.11.9-3.3-0.20.70.50.5-6.26.9-2.7
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value1.04.06.01.03.0-3.0-7.08.0-5.0-6.19.416-13.06.5-13.316-2.76.5-2.3-4.0-0.36.6-2.41.9-6.14.39.1
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value18516614714919216213917513315014015410410915610081936873787258876472
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2642.92075.02100.01862.52742.916200.06950.017500.013300.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-09-30
Value16216312913514113814014111513214114811064867265706956635557543223133122
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2314.32037.51842.91687.52014.313800.07000.014100.011500.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value166167133137144142144146119137148154115641027468737258666872744541353126155.722110.2
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating2371.42087.51900.01712.52057.114200.07200.014600.011900.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:ShellPipelineCompanyLP, shlx:CommonUnitsPublic


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value10310385883949404745503616312525297.25.97.26.97.98.02.1
Percentage of ProfitLoss62.061.762.061.127.533.633.634.330.632.431.224.830.534.837.440.310.010.010.910.110.910.85.9
Percentage of InterestIncomeOperating1471.41287.51062.51257.13900.04900.04000.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:ShellPipelineCompanyLP shlx:CommonUnitsPublic0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:CommonUnitsPublic


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value474838414456455856624320342925292924282321194.5
Percentage of ProfitLoss28.328.727.728.531.038.437.842.337.840.237.332.333.739.137.140.141.242.343.634.729.826.612.6
Percentage of InterestIncomeOperating671.4600.0475.0585.74400.05600.04500.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating shlx:CommonUnitsPublic0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

shlx:Amberjack, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value5055345456576258
Percentage of ProfitLoss30.132.925.639.438.940.142.548.7
Percentage of InterestIncomeOperating714.3687.5485.7675.0800.05700.06200.05800.0
Percentage of InterestIncomeOperating shlx:Amberjack us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Bengal, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value4.06.08.010.07.010.01510.0
Percentage of ProfitLoss2.43.66.07.34.97.010.38.4
Percentage of InterestIncomeOperating57.175.0114.3125.0100.01000.01500.01000.0
Percentage of InterestIncomeOperating shlx:Bengal us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Colonial, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value4597998911616910927
Percentage of ProfitLoss27.158.174.465.080.6119.074.722.7
Percentage of InterestIncomeOperating642.91212.51414.31112.51657.116900.010900.02700.0
Percentage of InterestIncomeOperating shlx:Colonial us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Explorer, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value6721282528385518
Percentage of ProfitLoss40.412.621.118.219.426.837.715.1
Percentage of InterestIncomeOperating957.1262.5400.0312.5400.03800.05500.01800.0
Percentage of InterestIncomeOperating shlx:Explorer us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Mars, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3641334640445042
Percentage of ProfitLoss21.724.624.833.627.831.034.235.3
Percentage of InterestIncomeOperating514.3512.5471.4575.0571.44400.05000.04200.0
Percentage of InterestIncomeOperating shlx:Mars us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:OtherInvestment, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value2123202023252117
Percentage of ProfitLoss12.713.815.014.616.017.614.414.3
Percentage of InterestIncomeOperating300.0287.5285.7250.0328.62500.02100.01700.0
Percentage of InterestIncomeOperating shlx:OtherInvestment us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

shlx:Poseidon, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value2431372620222023
Percentage of ProfitLoss14.518.627.819.013.915.513.719.3
Percentage of InterestIncomeOperating342.9387.5528.6325.0285.72200.02000.02300.0
Percentage of InterestIncomeOperating shlx:Poseidon us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther0.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value4.04.02.03.04.05.04.05.06.96.04.00.8121.92.22.22.82.52.512152011
Percentage of ProfitLoss2.42.41.52.12.83.43.43.64.73.93.51.212.62.63.23.03.94.33.818.721.427.032.0
Percentage of InterestIncomeOperating57.150.025.042.9400.0500.0400.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value269.01922167.0-9.0-1.0-70.0-7.0-10.6-11.6-489.81.7-286.4-0.8-221.0-0.9-96.4-32.2-98.9-0.6-96.6-37.9-55.3-11.3
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating371.4112.5271.4275.0228.6700.0-450.0-100.0-7000.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value3.01.010.08.02.07.07.07.01410.01013159.42214137.37.07.59.14.78.64.01.12.57.067
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireProductiveAssets dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:Ownership, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:ShellPipelineCompanyLP, shlx:TritonWestLLC, shlx:Zydeco, shlx:Zydeco


Payments
Period End2021-05-01
Value10.0
Percentage of PaymentsToAcquireProductiveAssets0.0

us-gaap:PaymentsToAcquireProductiveAssets dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:StatementScenario

shlx:ShellPipelineCompanyLP, shlx:TritonWestLLC, srt:ScenarioForecast


Payments
Period End2021-05-01
Value10.0
Percentage of PaymentsToAcquireProductiveAssets0.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-175.0-178.0-175.0-174.0-168.0-167.0-134.0-137.0-32.0-125.0-121.7-118.2375-63.795-63.4120-59.9-11.4-49.051-26.813-44.6-52.8-54.6
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating-2500.0-2225.0-2500.0-2175.0-2400.0-16700.0-6700.0-13700.0-3200.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:AllocatedGeneralCorporateExpensesRelatedParty

shlx:AllocatedGeneralCorporateExpensesRelatedParty


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7.05.04.08.010.07.06.08.06.07.06.08.08.08.0
Percentage of AllocatedGeneralCorporateExpensesRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:AllocatedOperatingExpensesRelatedParty

shlx:AllocatedOperatingExpensesRelatedParty


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value13141213164.05.05.03.05.04.03.03.04.0
Percentage of AllocatedOperatingExpensesRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:AllowanceOilNetRealizableValueReduction

shlx:AllowanceOilNetRealizableValueReduction


Allowance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312014-12-312013-12-31
Value0008000000.001000000.0005500000.000000700000.03000000.00
Percentage of AllowanceOilNetRealizableValueReduction0.00.00.0100.00.0100.00.00.0100.00.00.00.00.00.0100.0100.00.0

shlx:CapitalContributiontoEquityMethodInvestment

shlx:CapitalContributiontoEquityMethodInvestment


Capital
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value1.02.00.00.03.05.05.07.0140.00.0
Percentage of CapitalContributiontoEquityMethodInvestment100.0100.00.00.0100.0100.0100.0100.0100.00.00.0

shlx:CapitalLeaseRateIncreaseDecrease

shlx:CapitalLeaseRateIncreaseDecrease


Capital
Period End2020-07-01
Value2.0
Percentage of CapitalLeaseRateIncreaseDecrease100.0

shlx:ChangeInAccruedCapitalExpenditures

shlx:ChangeInAccruedCapitalExpenditures


Change
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
Value0.01.02.03.04.0-4.05.00.0-4.02.0-3.50.6-3.84.31.61.2-7.44.7-0.60.51.0-0.42.51.4-1.50.5
Percentage of ChangeInAccruedCapitalExpenditures0.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:CostofGoodsSoldThirdParties

shlx:CostofGoodsSoldThirdParties


Costof
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value7.04.03.02.0150.02.01.00.71.20.00.00.0
Percentage of CostofGoodsSoldThirdParties100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.00.0

shlx:DebtInstrumentEarlyPrepaymentFee us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:RelatedPartyTransactionsByRelatedParty

shlx:DebtInstrumentEarlyPrepaymentFee

us-gaap:RevolvingCreditFacility, shlx:FiveYearFixedFacility, shlx:ShellTreasuryCenterWestInc


Debt
Period End2021-03-23
Value2000000.0
Percentage of DebtInstrumentEarlyPrepaymentFee100.0

shlx:DistributionToHoldersOfIncentiveDistributionRightsWaived

shlx:DistributionToHoldersOfIncentiveDistributionRightsWaived


Distribution
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value16171617161717
Percentage of DistributionToHoldersOfIncentiveDistributionRightsWaived100.0100.0100.0100.0100.0100.0100.0

shlx:DistributionsPaidToNoncontrollingInterest

shlx:DistributionsPaidToNoncontrollingInterest


Distributions
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
Value3.04.04.03.04.05.04.04.06.03.05.34.54.71.9102.03.43.23.22.72.01211300.025
Percentage of DistributionsPaidToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

shlx:DistributionsPaidToUnitholdersAndGeneralPartner

shlx:DistributionsPaidToUnitholdersAndGeneralPartner


Distributions
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
Value17317317317216316214013111912912011310583776863585349413530272414
Percentage of DistributionsPaidToUnitholdersAndGeneralPartner100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:DistributionsToUnitholdersAndGeneralPartner

shlx:DistributionsToUnitholdersAndGeneralPartner


Distributions
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value1731731721631621311191291201131068377686358534941353027
Percentage of DistributionsToUnitholdersAndGeneralPartner100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:DistributionsToUnitholdersAndGeneralPartner dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:ShellPipelineCompanyLP, shlx:CommonUnitsPublic


Distributions
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value1041041035150474240383635292827255.95.75.45.14.74.44.1
Percentage of DistributionsToUnitholdersAndGeneralPartner60.160.159.931.330.935.935.331.031.631.933.035.636.639.640.710.110.611.012.213.314.514.8

shlx:DistributionsToUnitholdersAndGeneralPartner us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:CommonUnitsPublic


Distributions
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value57575757575351494745433231262524232217131110
Percentage of DistributionsToUnitholdersAndGeneralPartner32.932.933.135.035.240.542.938.039.139.840.639.640.639.440.441.843.444.942.739.436.336.8

shlx:EquityMethodInvestmentAmortizationAccretion

shlx:EquityMethodInvestmentAmortizationAccretion


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-31
Value2000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.01000000.01000000.0900000.0900000.0900000.01000000.01700000.0700000.0700000.0700000.01700000.0300000.0300000.0300000.0100000.0
Percentage of EquityMethodInvestmentAmortizationAccretion100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:FinanceLeaseCost us-gaap:PropertyPlantAndEquipmentByType

shlx:FinanceLeaseCost

us-gaap:MachineryAndEquipment


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.0230.00.00.0230.0
Percentage of FinanceLeaseCost0.0100.00.00.00.0100.00.0

shlx:IncomeDistributionsInExcess

shlx:IncomeDistributionsInExcess


Income
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value-38000000.0-32000000.0-24000000.01000000.0-16000000.0
Percentage of IncomeDistributionsInExcess100.0100.0100.0100.0100.0

shlx:IncomeDistributionsInExcess us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:LimitedPartnersCommonUnits


Income
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value-38000000.0-32000000.0-24000000.01000000.0-15000000.0
Percentage of IncomeDistributionsInExcess100.0100.0100.0100.093.8

shlx:IncreaseDecreaseInAllowanceOil

shlx:IncreaseDecreaseInAllowanceOil


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value4.05.03.02.01.00.0-1.01.02.0-2.02.5-3.26.10.41.72.40.4-1.11.22.80.40.40.72.20.2-0.3-0.9-4.2
Percentage of IncreaseDecreaseInAllowanceOil100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:InsuranceExpenseRelatedParties

shlx:InsuranceExpenseRelatedParties


Insurance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5.05.04.06.05.05.05.04.05.04.04.04.0
Percentage of InsuranceExpenseRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:InvestmentExcessDistribution us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:InvestmentExcessDistribution

shlx:Poseidon


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10.014127.09.09.08.08.09.08.06.67.89.01.0
Percentage of InvestmentExcessDistribution100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:LeaseRevenueRelatedParties

shlx:LeaseRevenueRelatedParties


Lease
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value151414141414141414133611135.5130.0
Percentage of LeaseRevenueRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

shlx:LeaseRevenueRelatedParties us-gaap:MajorCustomers

shlx:RelatedParties


Lease
Period End2020-09-302019-09-302018-09-30
Value151414
Percentage of LeaseRevenueRelatedParties100.0100.0100.0

shlx:MaintenanceServiceCostsRelatedParty

shlx:MaintenanceServiceCostsRelatedParty


Maintenance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value2000000.01000000.03000000.003000000.00
Percentage of MaintenanceServiceCostsRelatedParty100.0100.0100.00.0100.00.0

shlx:ManagementAgreementFeeRelatedParty

shlx:ManagementAgreementFeeRelatedParty


Management
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3000000.02000000.02000000.02000000.03000000.02000000.02000000.03000000.02000000.02000000.03000000.02000000.02000000.02000000.0
Percentage of ManagementAgreementFeeRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitDilutedNetOfTax us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitDilutedNetOfTax

shlx:LimitedPartnersCommonUnits


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.360.370.290.30.320.360.360.450.38
Percentage of NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitDilutedNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:NoncontrollingInterestInterestTransferred dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:Ownership, us-gaap:StatementScenario

shlx:NoncontrollingInterestInterestTransferred

shlx:ShellPipelineCompanyLP, shlx:TritonWestLLC, shlx:Zydeco, srt:ScenarioForecast


Noncontrolling
Period End2021-05-01
Value7.5
Percentage of NoncontrollingInterestInterestTransferred100.0

shlx:OmnibusAgreementFeeRelatedParty

shlx:OmnibusAgreementFeeRelatedParty


Omnibus
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.03.03.03.02.03.03.03.02.03.03.02.02.02.0
Percentage of OmnibusAgreementFeeRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:OperationsAndMaintenanceRelatedParties

shlx:OperationsAndMaintenanceRelatedParties


Operations
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3427303214141614
Percentage of OperationsAndMaintenanceRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0

shlx:OtherOperatingExpensesRelatedParties

shlx:OtherOperatingExpensesRelatedParties


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value147.019118.05.05.05.08.05.07.06.0
Percentage of OtherOperatingExpensesRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:OtherSeveranceSalariesAndOtherPayrollExpensesRelatedParty

shlx:OtherSeveranceSalariesAndOtherPayrollExpensesRelatedParty


Other
Period End2020-09-302020-06-302019-06-30
Value-2000000.02000000.00
Percentage of OtherSeveranceSalariesAndOtherPayrollExpensesRelatedParty100.0100.00.0

shlx:PaymentsOfFeeOnCreditFacility

shlx:PaymentsOfFeeOnCreditFacility


Payments
Period End2021-06-302021-03-31
Value02000000.0
Percentage of PaymentsOfFeeOnCreditFacility0.0100.0

shlx:ProceedsFromOtherContributionsFromParent

shlx:ProceedsFromOtherContributionsFromParent


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1.01.00.00.010.0-1.03.07.04.71.04.81.14.61.29.62.81.52.7-1.41.8110.00.00.0
Percentage of ProceedsFromOtherContributionsFromParent100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

shlx:WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingDiluted us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingDiluted

shlx:LimitedPartnersCommonUnits


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value44444417444444
Percentage of WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingDiluted100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2021-06-30
Value3000000.0
Percentage of AssetImpairmentCharges100.0

us-gaap:AssetImpairmentCharges us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Amberjack


Asset
Period End2021-06-30
Value4000000.0
Percentage of AssetImpairmentCharges133.3

us-gaap:AssetImpairmentCharges us-gaap:StatementScenario, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

srt:ScenarioForecast, shlx:AugerPipeline


Asset
Period End2021-03-31
Value3000000.0
Percentage of AssetImpairmentCharges0.0

us-gaap:CapitalizedContractCostAmortization us-gaap:ProductOrService

us-gaap:CapitalizedContractCostAmortization

shlx:TerminalingServices


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value4.04.0114.04.0
Percentage of CapitalizedContractCostAmortization100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress us-gaap:MajorCustomers

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress

shlx:RelatedParties


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.07.05.0114.01.00.00.00.00.00.41.21.50.0
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.00.0

shlx:ThirdParties


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.02.01.01.05.01.00.00.00.00.03.53.12.01.4
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress0.028.620.09.1125.0100.00.00.00.00.0875.0258.3133.30.0

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress us-gaap:ProductOrService

shlx:TerminalingServices


Contract
Period End2021-06-302021-03-312020-12-31
Value3.03.01.0
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress100.042.920.0

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress us-gaap:PurchaseCommitmentExcludingLongtermCommitment

shlx:MinimumVolumeCommitment


Contract
Period End2021-06-302021-03-312020-12-31
Value0.06.05.0
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress0.085.7100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized us-gaap:MajorCustomers

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

shlx:RelatedParties


Contract
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4000000.01000000.01000000.00001000000.02000000.0-17700000.03600000.03300000.0900000.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0

shlx:ThirdParties


Contract
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4000000.01000000.01000000.00001000000.07000000.0-13200000.01600000.01500000.02600000.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.00.00.00.0100.0350.074.644.445.5288.9

us-gaap:DefinedContributionPlanCostRecognized

us-gaap:DefinedContributionPlanCostRecognized


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-30
Value1000000.01000000.001000000.01000000.01000000.001000000.01000000.01000000.01100000.0600000.0700000.01000000.0900000.0500000.0300000.0300000.0300000.0300000.0300000.0200000.0200000.0
Percentage of DefinedContributionPlanCostRecognized100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value1213111313131312121211111111178.99.66.26.06.05.85.9113.53.53.43.42.92.01.6
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DistributionMadeToLimitedPartnerDistributionsPaidPerUnit

us-gaap:DistributionMadeToLimitedPartnerDistributionsPaidPerUnit


Distribution
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.30.460.460.460.460.460.4450.430.4150.40.3820.3650.3480.3330.3180.30410.2910.2770.263750.250.2350.220.2050.190.1750.1042
Percentage of DistributionMadeToLimitedPartnerDistributionsPaidPerUnit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DistributionMadeToLimitedPartnerDistributionsPaidPerUnit us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

shlx:CommonUnits, us-gaap:SubsequentEvent


Distribution
Period End2020-07-23
Value0.46
Percentage of DistributionMadeToLimitedPartnerDistributionsPaidPerUnit0.0

us-gaap:ImpairmentOfOilAndGasProperties

us-gaap:ImpairmentOfOilAndGasProperties


Impairment
Period End2021-06-302021-03-31
Value03000000.0
Percentage of ImpairmentOfOilAndGasProperties0.0100.0

us-gaap:ImpairmentOfOilAndGasProperties us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

shlx:AugerPipeline


Impairment
Period End2021-03-31
Value3000000.0
Percentage of ImpairmentOfOilAndGasProperties100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value10510287109109112108115807073724840694137383021252322241012
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Amberjack


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value262916282929313131323133160.0
Percentage of IncomeLossFromEquityMethodInvestments24.828.418.425.726.625.928.727.038.845.742.145.433.10.0

shlx:Bengal


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2.03.04.05.04.05.06.08.05.05.05.75.35.44.45.76.25.45.34.35.25.35.45.05.65.15.13.3
Percentage of IncomeLossFromEquityMethodInvestments1.92.94.64.63.74.55.67.06.27.17.77.311.210.98.215.014.513.713.924.320.723.322.023.247.240.80.0

shlx:Colonial


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-06-30
Value7.0151614182719174.00.0
Percentage of IncomeLossFromEquityMethodInvestments6.714.718.412.816.524.117.614.85.00.0

shlx:Explorer


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-06-30
Value267.0119.010.01414207.00.0
Percentage of IncomeLossFromEquityMethodInvestments24.86.912.68.39.212.513.017.48.80.0

shlx:Mars


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value252922332831333529293130212458222021158.612109.6105.77.43.4
Percentage of IncomeLossFromEquityMethodInvestments23.828.425.330.325.727.730.630.436.241.442.941.443.861.783.653.454.355.649.540.247.747.042.343.652.859.20.0

shlx:Mattox


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value15151515150.0
Percentage of IncomeLossFromEquityMethodInvestments14.314.717.213.813.80.0

shlx:OtherInvestment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-06-30
Value4.04.03.05.05.06.05.04.04.05.0
Percentage of IncomeLossFromEquityMethodInvestments3.83.93.44.64.65.44.63.55.010.3

us-gaap:IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions

us-gaap:IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value5.05.0-2.05.01.00.01.02.00.03.03.30.31.30.92.42.60.70.80.9-1.7-2.01.0-27.4244.50.0
Percentage of IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value5.0-10.03.03.0-9.08.07.00.0-5.8-1.42.615-9.34.26.33.4-6.83.02.2-0.1-1.72.64.24.4-3.7-3.3
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerAsset

us-gaap:IncreaseDecreaseInContractWithCustomerAsset


Increase
Period End2021-06-302021-03-312020-12-312020-09-30
Value-4000000.0-4000000.0-3000000.0-4000000.0
Percentage of IncreaseDecreaseInContractWithCustomerAsset100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value117.02.00.0-3.0-8.0-1.2-1.0-2.0
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidExpense

us-gaap:IncreaseDecreaseInPrepaidExpense


Increase
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-8000000.0-8000000.04000000.0-7000000.0-3000000.0-4000000.0-6000000.0-4000000.0-3700000.0-3600000.0-2800000.0-2600000.0-2300000.0500000.05300000.0-1100000.0-1600000.0-1600000.03700000.0-200000.0-1200000.0-1100000.0
Percentage of IncreaseDecreaseInPrepaidExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseRelatedParty

us-gaap:InterestExpenseRelatedParty


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2021212223242526222019181210.09.69.16.74.03.62.01.02.1
Percentage of InterestExpenseRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeRelatedParty us-gaap:ProductOrService, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SaleLeasebackTransactionDescription

us-gaap:InterestIncomeRelatedParty

shlx:TerminalingServices, srt:AffiliatedEntity, shlx:April2020Transaction


Interest
Period End2021-06-302020-12-312020-09-302020-06-30
Value7.08.08.07.0
Percentage of InterestIncomeRelatedParty100.0100.0100.0100.0

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest dei:LegalEntity, us-gaap:Ownership, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest

shlx:ShellPipelineCompanyLP, shlx:LimitedPartnerInterest, us-gaap:LimitedPartner


Limited
Period End2021-06-302021-03-312020-09-302020-06-30
Value068.546.00.46
Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest0.0100.0100.0100.0

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest us-gaap:Ownership, us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:ShellPipelineCompanyLP, us-gaap:LimitedPartner


Limited
Period End2021-06-302021-03-312020-12-31
Value068.50
Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest0.0100.00.0

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest us-gaap:Ownership, us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementClassOfStock

shlx:ShellPipelineCompanyLP, us-gaap:LimitedPartner, shlx:CommonUnitsAndSeriesAPerpetualConvertiblePreferredUnits


Limited
Period End2021-06-302021-03-31
Value072.0
Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest0.0105.1

us-gaap:ManagingMemberOrGeneralPartnerSubsequentDistributionAmount

us-gaap:ManagingMemberOrGeneralPartnerSubsequentDistributionAmount


Managing
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
Value13017317317317316216214013111912912111310583776863585349413530272414
Percentage of ManagingMemberOrGeneralPartnerSubsequentDistributionAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ManagingMemberOrGeneralPartnerSubsequentDistributionAmount dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:GeneralPublic, shlx:CommonUnits


Managing
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
Value375757575757575653514947454332312625242322171311108.04.8
Percentage of ManagingMemberOrGeneralPartnerSubsequentDistributionAmount28.532.932.932.932.935.235.240.040.542.938.439.139.940.839.640.639.440.441.843.244.942.939.136.336.833.233.3

shlx:ShellPipelineCompanyLP, shlx:CommonUnits


Managing
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
Value81104104104104505048474240383634292827255.95.75.45.14.74.44.13.82.2
Percentage of ManagingMemberOrGeneralPartnerSubsequentDistributionAmount62.360.160.160.160.130.930.934.335.935.331.031.632.232.935.636.639.640.710.110.611.012.213.314.514.815.815.3

shlx:ShellPipelineCompanyLP, shlx:PreferredUnits


Managing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value12121212120.00.00.00.00.00.0
Percentage of ManagingMemberOrGeneralPartnerSubsequentDistributionAmount9.26.96.96.96.90.00.00.00.00.00.0

us-gaap:NetIncomeLossAllocatedToGeneralPartners

us-gaap:NetIncomeLossAllocatedToGeneralPartners


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302015-12-312015-09-302015-06-302015-03-31
Value0.00.00.0555436302.31.50.70.5
Percentage of NetIncomeLossAllocatedToGeneralPartners0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAllocatedToLimitedPartners

us-gaap:NetIncomeLossAllocatedToLimitedPartners


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value150151117123129838610585105101112793765555158594958525452312313
Percentage of NetIncomeLossAllocatedToLimitedPartners100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasic us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasic

shlx:LimitedPartnersCommonUnits


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.380.380.30.310.330.360.360.450.38
Percentage of NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable

us-gaap:NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value12123612120.0
Percentage of NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable100.0100.0100.0100.0100.00.0

us-gaap:NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PreferredPartner


Noncontrolling
Period End2020-12-312020-09-302020-06-302019-06-30
Value1212120.0
Percentage of NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable33.3100.0100.00.0

us-gaap:OperatingLeaseCost us-gaap:PropertyPlantAndEquipmentByType

us-gaap:OperatingLeaseCost

us-gaap:MachineryAndEquipment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-7.03720.01.02.03690.0
Percentage of OperatingLeaseCost100.0100.00.0100.0100.0100.00.0

us-gaap:OperatingLeaseLeaseIncome

us-gaap:OperatingLeaseLeaseIncome


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value14141514141414
Percentage of OperatingLeaseLeaseIncome100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3000000.0-2000000.0002000000.0000000
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.00.00.0100.00.00.00.00.00.00.0

us-gaap:OtherPostretirementBenefitExpense

us-gaap:OtherPostretirementBenefitExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-30
Value1000000.02000000.01000000.01000000.01000000.02000000.01000000.02000000.02000000.02000000.01100000.01600000.01700000.02000000.01100000.01200000.0900000.0800000.0700000.0700000.0600000.01500000.01100000.0
Percentage of OtherPostretirementBenefitExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAccountDistributions

us-gaap:PartnersCapitalAccountDistributions


Partners
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value161161161162162140131119129121113105837768635853494135302724
Percentage of PartnersCapitalAccountDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAccountDistributions us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:LimitedPartnersCommonUnits


Partners
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1611611611071071041009389858177625953513029272318151411
Percentage of PartnersCapitalAccountDistributions100.0100.0100.066.066.074.376.378.269.470.772.073.775.277.179.081.151.953.855.955.252.750.851.649.0

us-gaap:GeneralPartner


Partners
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.00.00.0555536312639353127201714129.57.14.72.91.91.00.60.5
Percentage of PartnersCapitalAccountDistributions0.00.00.034.034.025.723.721.830.629.328.026.324.822.921.018.916.213.29.67.05.43.32.22.1

us-gaap:PartnersCapitalAccountExchangesAndConversions

us-gaap:PartnersCapitalAccountExchangesAndConversions


Partners
Period End2021-06-30
Value9.0
Percentage of PartnersCapitalAccountExchangesAndConversions100.0

us-gaap:PartnersCapitalAccountExchangesAndConversions dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:ShellPipelineCompanyLP, shlx:CommonUnitsPublic


Partners
Period End2021-06-30
Value31
Percentage of PartnersCapitalAccountExchangesAndConversions344.4

us-gaap:PartnersCapitalAccountExchangesAndConversions us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Partners
Period End2021-06-30
Value-22.0
Percentage of PartnersCapitalAccountExchangesAndConversions-244.4

us-gaap:PaymentsOfDividendsMinorityInterest dei:LegalEntity

us-gaap:PaymentsOfDividendsMinorityInterest

shlx:OdysseyPipelineL.L.C.


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.04.03.02.02.04.04.03.04.02.02.72.71.81.92.22.72.62.5
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:Zydeco


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value1.01.02.01.00.01.02.01.02.61.82.90.00.32.03.43.23.22.72.012111515
Percentage of PaymentsOfDividendsMinorityInterest33.350.0100.025.00.033.350.050.096.366.7161.10.013.674.1130.8128.00.00.00.00.00.00.00.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1281231291421351351251308384887751734238433524312624231315
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromInterestReceived us-gaap:ProductOrService, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SaleLeasebackTransactionDescription

us-gaap:ProceedsFromInterestReceived

shlx:TerminalingServices, srt:AffiliatedEntity, shlx:April2020Transaction


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value7.01.08.07.05.0
Percentage of ProceedsFromInterestReceived100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfPrivatePlacement

us-gaap:ProceedsFromIssuanceOfPrivatePlacement


Proceeds
Period End2020-09-302019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312015-09-30
Value0.00.00.00.00.00.3973-277.92750.00.0-0.30.0
Percentage of ProceedsFromIssuanceOfPrivatePlacement0.00.00.00.00.0100.0100.0100.0100.00.00.0100.00.0

us-gaap:ProceedsFromLimitedPartnershipInvestments

us-gaap:ProceedsFromLimitedPartnershipInvestments


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value18122930181410.09.0398.07.08.621115.93.92.46.05.41.63.94.12.3-0.92.23.2
Percentage of ProceedsFromLimitedPartnershipInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfRelatedPartyDebt us-gaap:ProductOrService, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SaleLeasebackTransactionDescription

us-gaap:ProceedsFromRepaymentsOfRelatedPartyDebt

shlx:TerminalingServices, srt:AffiliatedEntity, shlx:April2020Transaction


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1000000.08000000.01000000.01000000.01000000.0
Percentage of ProceedsFromRepaymentsOfRelatedPartyDebt100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfProductiveAssets us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:ProceedsFromSaleOfProductiveAssets

shlx:AugerPipeline


Proceeds
Period End2021-04-29
Value2000000.0
Percentage of ProceedsFromSaleOfProductiveAssets100.0

us-gaap:RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty

us-gaap:RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value1210.09.01117121214121112121312228.68.26.45.85.75.95.79.94.94.85.04.32.52.82.6
Percentage of RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SeveranceCosts1

us-gaap:SeveranceCosts1


Severance
Period End2020-12-312020-09-302020-06-30
Value1000000.01000000.05000000.0
Percentage of SeveranceCosts1100.0100.0100.0

us-gaap:TaxesExcludingIncomeAndExciseTaxes

us-gaap:TaxesExcludingIncomeAndExciseTaxes


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value6.05.05.06.04.05.03.05.05.04.03.42.54.55.56.23.63.42.81.81.31.93.20.40.73.23.21.21.21.01.0
Percentage of TaxesExcludingIncomeAndExciseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingBasic us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingBasic

shlx:LimitedPartnersCommonUnits


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302015-12-312015-09-302015-06-302015-03-31
Value393393133933930.8757567
Percentage of WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageLimitedPartnershipUnitsOutstanding dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:WeightedAverageLimitedPartnershipUnitsOutstanding

shlx:ShellPipelineCompanyLP, shlx:CommonUnits


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value269269269269109109102100100100958989880.02121210.0212121
Percentage of WeightedAverageLimitedPartnershipUnitsOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:WeightedAverageLimitedPartnershipUnitsOutstanding us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:CommonUnitsPublic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1231231231231231231231231231231139088882.78881630.8535346
Percentage of WeightedAverageLimitedPartnershipUnitsOutstanding45.945.945.945.9113.1113.1120.7123.8123.8123.8119.0101.399.399.40.0410.7377.2294.90.0249.8249.8214.0

us-gaap:WeightedAverageLimitedPartnershipUnitsOutstandingDiluted dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:WeightedAverageLimitedPartnershipUnitsOutstandingDiluted

shlx:ShellPipelineCompanyLP, shlx:CommonUnits


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302015-12-312015-09-30
Value320320173203201091.31091020.021
Percentage of WeightedAverageLimitedPartnershipUnitsOutstandingDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:WeightedAverageLimitedPartnershipUnitsOutstandingDiluted us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:CommonUnitsPublic


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302015-12-312015-09-30
Value1231230.01231231230.01231233.053
Percentage of WeightedAverageLimitedPartnershipUnitsOutstandingDiluted38.738.70.038.738.7113.10.0113.1120.70.0249.8

shlx:AccrualForTransportationAndProjectEngineering

shlx:AccrualForTransportationAndProjectEngineering


Accrual
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value4.06.06.04.05.07.07.05.06.75.815216.07.86.09.53.51.70.42.43.01.11.10.70.60.327
Percentage of AccrualForTransportationAndProjectEngineering100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:AccruedInterestRelatedPartiesCurrent

shlx:AccruedInterestRelatedPartiesCurrent


Accrued
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
Value141216151617181816141413115.36.65.55.62.92.61.3
Percentage of AccruedInterestRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:AccruedLiabilitiesRelatedPartiesCurrent

shlx:AccruedLiabilitiesRelatedPartiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value191628172017191917151514115.97.25.96.26.25.15.62.62.83.61.31.32.11.40.40.0
Percentage of AccruedLiabilitiesRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

shlx:AllowanceOil

shlx:AllowanceOil


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value18149.07.05.04.0121313111215181212108.37.99.07.85.04.64.24.63.33.13.47.310.0
Percentage of AllowanceOil100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:ContractWithCustomerAmortizationReminderOfFiscalYear

shlx:ContractWithCustomerAmortizationReminderOfFiscalYear


Contract
Period End2021-06-302021-03-312020-09-30
Value8.0114.0
Percentage of ContractWithCustomerAmortizationReminderOfFiscalYear100.0100.0100.0

shlx:ContractWithCustomerAmortizationYearFive

shlx:ContractWithCustomerAmortizationYearFive


Contract
Period End2021-06-302021-03-312020-12-312020-09-30
Value15151717
Percentage of ContractWithCustomerAmortizationYearFive100.0100.0100.0100.0

shlx:ContractWithCustomerAmortizationYearOne

shlx:ContractWithCustomerAmortizationYearOne


Contract
Period End2021-06-302021-03-312020-12-312020-09-30
Value16161515
Percentage of ContractWithCustomerAmortizationYearOne100.0100.0100.0100.0

shlx:ContractWithCustomerAmortizationYearThree

shlx:ContractWithCustomerAmortizationYearThree


Contract
Period End2021-06-302021-03-312020-12-312020-09-30
Value17171616
Percentage of ContractWithCustomerAmortizationYearThree100.0100.0100.0100.0

shlx:ContractWithCustomerLiabilityRelatedPartiesCurrent

shlx:ContractWithCustomerLiabilityRelatedPartiesCurrent


Contract
Period End2020-12-312019-12-312018-12-312017-12-31
Value190.02.613
Percentage of ContractWithCustomerLiabilityRelatedPartiesCurrent100.00.0100.0100.0

shlx:DeferredRevenueRelatedPartiesCurrent

shlx:DeferredRevenueRelatedPartiesCurrent


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value182219144.01.00.00.00.01.03.04.36.78.5132015147.91.52.22.03.66.29.39.34.72.90.0
Percentage of DeferredRevenueRelatedPartiesCurrent100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

shlx:EquitySecuritiesWithoutReadilyDeterminableFairValuePercent us-gaap:Ownership

shlx:EquitySecuritiesWithoutReadilyDeterminableFairValuePercent

shlx:Cleopatra


Equity
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.00.010.010.01
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValuePercent100.0100.0100.0100.0

shlx:FinanceLeaseAccumulatedDepreciation

shlx:FinanceLeaseAccumulatedDepreciation


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value9000000.08000000.08000000.07000000.07000000.07000000.06000000.06000000.05000000.0
Percentage of FinanceLeaseAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:FinanceLeaseLiabilityPaymentsDueExecutoryCosts

shlx:FinanceLeaseLiabilityPaymentsDueExecutoryCosts


Finance
Period End2020-12-31
Value8000000.0
Percentage of FinanceLeaseLiabilityPaymentsDueExecutoryCosts100.0

shlx:FinanceLeaseLiabilityPaymentsDuePrincipalAmount

shlx:FinanceLeaseLiabilityPaymentsDuePrincipalAmount


Finance
Period End2020-12-31
Value24
Percentage of FinanceLeaseLiabilityPaymentsDuePrincipalAmount100.0

shlx:LeaseRightOfUseAsset

shlx:LeaseRightOfUseAsset


Lease
Period End2020-12-312019-12-31
Value2021
Percentage of LeaseRightOfUseAsset100.0100.0

shlx:LesseeOperatingLeasePaymentsDueRelatedToOptionsToExtend

shlx:LesseeOperatingLeasePaymentsDueRelatedToOptionsToExtend


Lessee
Period End2020-12-31
Value2000000.0
Percentage of LesseeOperatingLeasePaymentsDueRelatedToOptionsToExtend100.0

shlx:LessorOperatingLeasePaymentToBeReceivedYearFourAndFive

shlx:LessorOperatingLeasePaymentToBeReceivedYearFourAndFive


Lessor
Period End2021-06-302021-03-312020-09-30
Value210220219
Percentage of LessorOperatingLeasePaymentToBeReceivedYearFourAndFive100.0100.0100.0

shlx:LessorOperatingLeasePaymentToBeReceivedYearTwoAndThree

shlx:LessorOperatingLeasePaymentToBeReceivedYearTwoAndThree


Lessor
Period End2021-06-302021-03-312020-09-30
Value210220219
Percentage of LessorOperatingLeasePaymentToBeReceivedYearTwoAndThree100.0100.0100.0

shlx:LessorOperatingLeasePaymentsToBeReceivedFourToFiveYears us-gaap:ProductOrService

shlx:LessorOperatingLeasePaymentsToBeReceivedFourToFiveYears

shlx:LeaseAndNonLeaseServiceComponents


Lessor
Period End2020-12-31
Value220
Percentage of LessorOperatingLeasePaymentsToBeReceivedFourToFiveYears100.0

shlx:LessorOperatingLeasePaymentsToBeReceivedRelatedToOptionsToExtend

shlx:LessorOperatingLeasePaymentsToBeReceivedRelatedToOptionsToExtend


Lessor
Period End2020-12-31
Value366
Percentage of LessorOperatingLeasePaymentsToBeReceivedRelatedToOptionsToExtend100.0

shlx:LessorOperatingLeasePaymentsToBeReceivedTwoToThreeYears us-gaap:ProductOrService

shlx:LessorOperatingLeasePaymentsToBeReceivedTwoToThreeYears

shlx:LeaseAndNonLeaseServiceComponents


Lessor
Period End2020-12-31
Value220
Percentage of LessorOperatingLeasePaymentsToBeReceivedTwoToThreeYears100.0

shlx:OperatingAndFinanceLeaseLiabilities

shlx:OperatingAndFinanceLeaseLiabilities


Operating
Period End2020-12-31
Value29
Percentage of OperatingAndFinanceLeaseLiabilities100.0

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDue

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDue


Operating
Period End2020-12-31
Value56
Percentage of OperatingAndFinanceLeaseLiabilitiesPaymentsDue100.0

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueAfterYearFive

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueAfterYearFive


Operating
Period End2020-12-31
Value33
Percentage of OperatingAndFinanceLeaseLiabilitiesPaymentsDueAfterYearFive100.0

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueNextTwelveMonths

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueNextTwelveMonths


Operating
Period End2020-12-31
Value4000000.0
Percentage of OperatingAndFinanceLeaseLiabilitiesPaymentsDueNextTwelveMonths100.0

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFive

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFive


Operating
Period End2020-12-31
Value5000000.0
Percentage of OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFive100.0

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFour

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFour


Operating
Period End2020-12-31
Value5000000.0
Percentage of OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearFour100.0

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearThree

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearThree


Operating
Period End2020-12-31
Value4000000.0
Percentage of OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearThree100.0

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearTwo

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearTwo


Operating
Period End2020-12-31
Value5000000.0
Percentage of OperatingAndFinanceLeaseLiabilitiesPaymentsDueYearTwo100.0

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsUndiscountedExcessAmount

shlx:OperatingAndFinanceLeaseLiabilitiesPaymentsUndiscountedExcessAmount


Operating
Period End2020-12-31
Value27
Percentage of OperatingAndFinanceLeaseLiabilitiesPaymentsUndiscountedExcessAmount100.0

shlx:OperatingLeaseAccumulatedDepreciation

shlx:OperatingLeaseAccumulatedDepreciation


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value148150147143139136133131121
Percentage of OperatingLeaseAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:OtherAccruedLiabilitiesRelatedPartiesCurrent

shlx:OtherAccruedLiabilitiesRelatedPartiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value5.04.0122.04.01.01.01.01.01.40.60.50.60.60.40.61.90.90.5
Percentage of OtherAccruedLiabilitiesRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:PrepaidExpensesRelatedPartiesCurrent

shlx:PrepaidExpensesRelatedPartiesCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7.0142210.06.011152.06.011151.44.98.5110.63.2
Percentage of PrepaidExpensesRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetExcludingConstructionInProgress

shlx:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetExcludingConstructionInProgress


Property
Period End2021-06-302021-03-312020-12-31
Value666680695
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetExcludingConstructionInProgress100.0100.0100.0

shlx:PropertyPlantAndEquipmentExcludingConstructionInProgress

shlx:PropertyPlantAndEquipmentExcludingConstructionInProgress


Property
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value695699691703699692681687663670672683692574577374377371371377382268264267264245216
Percentage of PropertyPlantAndEquipmentExcludingConstructionInProgress100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:AccountsPayableRelatedPartiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value14121620218.010.010.08.09.08.910129.71110115.75.25.74.18.59.35.94.84.3104.90.0
Percentage of AccountsPayableRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AccountsReceivableRelatedPartiesCurrent

us-gaap:AccountsReceivableRelatedPartiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value333121403632293039292835242323162313107.26.78.19.83.87.74.2101311
Percentage of AccountsReceivableRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent


Accrual
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value5.0139.05.04.0139.05.03.9119.28.44.27.24.52.10.64.94.22.80.36.05.82.90.21.00.6
Percentage of AccrualForTaxesOtherThanIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BuildingsAndImprovementsGross

us-gaap:BuildingsAndImprovementsGross


Buildings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value4647474747404040404039393838383730202019191919101010108.28.2
Percentage of BuildingsAndImprovementsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashUninsuredAmount

us-gaap:CashUninsuredAmount


Cash
Period End2020-12-312019-12-312018-12-31
Value320289207
Percentage of CashUninsuredAmount100.0100.0100.0

us-gaap:ContractWithCustomerAssetGrossCurrent

us-gaap:ContractWithCustomerAssetGrossCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-01-012019-12-31
Value2252292332372400.00.0
Percentage of ContractWithCustomerAssetGrossCurrent100.0100.0100.0100.0100.00.00.0

us-gaap:ContractWithCustomerAssetGrossCurrent us-gaap:MajorCustomers

shlx:RelatedParties


Contract
Period End2021-06-302021-03-312020-12-31
Value225229233
Percentage of ContractWithCustomerAssetGrossCurrent100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3000000.03000000.03000000.03000000.03000000.02000000.02000000.02000000.02000000.03000000.02000000.02600000.02600000.0
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value269426942694269426942694269426942094
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtWeightedAverageInterestRate us-gaap:CounterpartyName, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:DebtWeightedAverageInterestRate

shlx:ShellTreasuryCenterWestInc, us-gaap:RevolvingCreditFacility, shlx:FiveYearRevolverdueDecember2022, srt:AffiliatedEntity


Debt
Period End2020-12-312019-12-31
Value2.260.0376
Percentage of DebtWeightedAverageInterestRate100.0100.0

us-gaap:DebtWeightedAverageInterestRate us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:RevolvingCreditFacility, shlx:FiveYearRevolverDueJuly2023


Debt
Period End2020-12-312019-12-31
Value2.060.0357
Percentage of DebtWeightedAverageInterestRate91.294.9

us-gaap:DueFromRelatedParties

us-gaap:DueFromRelatedParties


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312015-12-312015-09-302015-06-302014-12-31
Value2962972983003010.0135.29.112
Percentage of DueFromRelatedParties100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312014-11-03
Value80828486889092949739404142404128292930155.85.9
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage shlx:AssetAcquisition, shlx:InvestmentName

us-gaap:EquityMethodInvestmentOwnershipPercentage

shlx:June2019Acquisition, shlx:Colonial


Equity
Period End2020-09-302020-06-302019-09-30
Value16.1250.161250.16125
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0

shlx:June2019Acquisition, shlx:Explorer


Equity
Period End2020-09-302020-06-302019-09-30
Value38.590.38590.3859
Percentage of EquityMethodInvestmentOwnershipPercentage239.3239.3239.3

us-gaap:EquityMethodInvestmentOwnershipPercentage shlx:AssetAcquisition, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:June2019Acquisition, shlx:Colonial


Equity
Period End2020-12-312019-12-312019-06-30
Value16.1250.161250.16125
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0

shlx:June2019Acquisition, shlx:Explorer


Equity
Period End2020-12-312019-12-312019-06-30
Value38.590.38590.3859
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:AmberjackPipelineCompanyLLCSeriesA


Equity
Period End2020-12-312019-12-312018-12-31
Value75.00.750.75
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0

shlx:AmberjackPipelineCompanyLLCSeriesB


Equity
Period End2020-12-312019-12-312018-12-31
Value50.00.50.5
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0

shlx:Bengal


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value50.050.050.050.00.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.490.490.490.490.490.49
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0310.1310.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:Cleopatra


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1.01.01.01.00.010.010.010.010.010.010.010.010.010.010.01
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.06.26.20.00.00.00.00.00.00.00.00.00.0

shlx:Colonial


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value16.12516.12516.12516.1250.161250.161250.161250.060.060.060.060.060.060.060.06
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0100.0100.00.00.00.00.00.00.00.00.00.00.0

shlx:CrestwoodPermianBasinLLC


Equity
Period End2020-12-312019-12-312018-12-312017-12-31
Value50.00.50.50.5
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.00.0

shlx:Endymion


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value10.010.010.010.00.10.10.10.10.10.10.10.10.10.10.10.10.10
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.062.062.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:Explorer


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302018-12-31
Value38.5938.5938.5938.590.38590.38590.38590.1262
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0239.3239.30.00.00.0

shlx:LOCAPLLC


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value41.4841.4841.4841.480.41480.41480.41480.41480.41480.41480.41480.41480.41480.4148
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0257.2257.20.00.00.00.00.00.00.00.00.0

shlx:Mars


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value71.571.571.571.50.7150.7150.7150.7150.7150.7150.7150.7150.7150.4860.4860.4860.4860.2860.2860.2860.2860.2860.2860.2860.286
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0443.4443.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:Mattox


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value79.079.079.079.00.790
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0489.9489.90.0

shlx:MattoxPipelineCompanyLLCMattox


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value79.079.079.079.00.79
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0489.9489.9

shlx:OdysseyPipelineL.L.C.


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value71.071.071.071.00.710.710.710.710.710.710.710.710.710.490.490.490.490
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0440.3440.30.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:PermianBasin


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value50.050.050.050.00.50.50.50.50.50.50.50.50.50
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0310.1310.10.00.00.00.00.00.00.00.00.0

shlx:Poseidon


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-07-01
Value36.036.036.036.00.360.360.360.360.360.360.360.360.360.360.360.360.360.360.360.360.360.360.36
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0223.3223.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:Proteus


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value10.010.010.010.00.10.10.10.10.10.10.10.10.10.10.10.10.10
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.062.062.00.00.00.00.00.00.00.00.00.00.00.00.00.0

shlx:SeriesAAmberjackPipelineCompanyLLC


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-30
Value75.075.075.075.00.750.750.750.750.750.750.75
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0465.1465.10.00.00.00.00.00.0

shlx:SeriesBAmberjackPipelineCompanyLLC


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-30
Value50.050.050.050.00.50.50.50.50.50.50.5
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0310.1310.10.00.00.00.00.00.0

shlx:Zydeco


Equity
Period End2021-05-012021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value100.092.592.592.50.9250.9250.9250.9250.9250.9250.9250.9250.9250.9250.925
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.0573.6573.60.00.00.00.00.00.00.00.00.00.0

us-gaap:EquityMethodInvestments

us-gaap:EquityMethodInvestments


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value99610071013104510699129269269308148228198203453622532552562621741771811851861551571600.0
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:EquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Amberjack


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3673763823954144264414444584624650.0
Percentage of EquityMethodInvestments36.837.337.737.838.746.047.454.555.756.556.70.0

shlx:Bengal


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value86898889888884848180808079787776767674747574737275
Percentage of EquityMethodInvestments8.68.88.78.58.29.59.010.39.99.99.823.222.030.830.529.929.044.041.941.140.939.747.446.346.7

shlx:Colonial


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302018-12-31
Value383129282830300.0
Percentage of EquityMethodInvestments3.83.12.92.72.63.23.20.0

shlx:Endymion


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value17171718181818181818191919192020200.0
Percentage of EquityMethodInvestments1.71.71.71.71.71.91.92.22.22.32.35.65.47.87.87.97.90.0

shlx:Explorer


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302018-12-31
Value697073798488920.0
Percentage of EquityMethodInvestments6.97.07.27.67.99.59.90.0

shlx:LOCAPLLC


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1514121210.09.08.09.08.28.48.47.56.94.0
Percentage of EquityMethodInvestments1.51.41.21.10.91.00.91.11.01.01.02.21.91.5

shlx:Mars


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1491531521561531611621671681661681731871291291281308184858484818485
Percentage of EquityMethodInvestments15.015.215.014.914.317.417.420.520.520.320.650.151.751.150.750.049.646.747.446.745.445.352.653.753.3

shlx:Mattox


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1601611631661710.0
Percentage of EquityMethodInvestments16.116.016.115.916.00.0

shlx:PermianBasin


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value828283888991797672666148490.0
Percentage of EquityMethodInvestments8.28.18.28.48.39.88.59.38.88.17.514.013.60.0

shlx:Proteus


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value13141414141516161616161717171718190.0
Percentage of EquityMethodInvestments1.31.41.41.31.31.61.72.02.02.02.04.94.86.97.07.17.30.0

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-31
Value2.02.02.02.02.02.02.02.0626262
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount us-gaap:Ownership

shlx:Cleopatra


Equity
Period End2020-12-312019-12-312018-12-312017-12-31
Value2.02.02.12.1
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount100.0100.03.43.4

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2020-12-31
Value25
Percentage of FinanceLeaseLiability100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-31
Value2000000.02000000.01000000.01000000.01000000.01000000.01000000.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2324242424242425252525
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2020-12-31
Value49
Percentage of FinanceLeaseLiabilityPaymentsDue100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive


Finance
Period End2020-12-31
Value28
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2020-12-31
Value4000000.0
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive


Finance
Period End2020-12-31
Value5000000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2020-12-31
Value4000000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2020-12-31
Value4000000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2020-12-31
Value4000000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2020-12-31
Value24
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2020-12-312019-12-31
Value1617
Percentage of FinanceLeaseRightOfUseAsset100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization


Finance
Period End2020-12-312019-12-31
Value8000000.06000000.0
Percentage of FinanceLeaseRightOfUseAssetAccumulatedAmortization100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceived


Lessor
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value646707731756831
Percentage of LessorOperatingLeasePaymentsToBeReceived100.0100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceived us-gaap:ProductOrService

shlx:LeaseAndNonLeaseServiceComponents


Lessor
Period End2020-12-31
Value735
Percentage of LessorOperatingLeasePaymentsToBeReceived100.5

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears


Lessor
Period End2020-12-31
Value56
Percentage of LessorOperatingLeasePaymentsToBeReceivedFiveYears100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears


Lessor
Period End2020-12-31
Value56
Percentage of LessorOperatingLeasePaymentsToBeReceivedFourYears100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths


Lessor
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1051115611056
Percentage of LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths100.0100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths us-gaap:ProductOrService

shlx:LeaseAndNonLeaseServiceComponents


Lessor
Period End2020-12-31
Value111
Percentage of LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths198.2

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter


Lessor
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value121156451208551
Percentage of LessorOperatingLeasePaymentsToBeReceivedThereafter100.0100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter us-gaap:ProductOrService

shlx:LeaseAndNonLeaseServiceComponents


Lessor
Period End2020-12-31
Value184
Percentage of LessorOperatingLeasePaymentsToBeReceivedThereafter40.8

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears


Lessor
Period End2020-12-31
Value56
Percentage of LessorOperatingLeasePaymentsToBeReceivedThreeYears100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears


Lessor
Period End2020-12-31
Value56
Percentage of LessorOperatingLeasePaymentsToBeReceivedTwoYears100.0

us-gaap:LimitedPartnersCapitalAccount dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartnersCapitalAccount

shlx:ShellPipelineCompanyLP, shlx:CommonUnits


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value-2468.0-2498.0-2497.0-2474.0-2456.0-214.0-203.0-196.0-198.0-196.0-198.0-205.1-219.0-219.7-507.2-510.2-509.1-508.9-124.1-125.6-126.1-128.2-130.4-133.9-137.8-138.8-140.30.0
Percentage of LimitedPartnersCapitalAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:LimitedPartnersCapitalAccount us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:CommonUnits


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312014-12-31
Value3363337333823402342134501016
Percentage of LimitedPartnersCapitalAccount-136.3-135.0-135.4-137.5-139.3-1699.5-724.3

us-gaap:LineOfCredit

us-gaap:LineOfCredit


Line
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
Value2691269126922692269226922692269126912091209020902091871184410001265685686343344474584200.0
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:LineOfCredit us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:RevolvingCreditFacility, shlx:TenYearFixedFacility


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6006006006006006006006006000.0
Percentage of LineOfCredit22.322.322.322.322.322.322.322.322.30.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value8668968968968968968968968968968968962961516543283
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtFairValue


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value289828792928291928912790282528192099
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners dei:LegalEntity, us-gaap:Ownership

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners

shlx:OdysseyPipelineL.L.C., shlx:GELOffshorePipelineLLC


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-31
Value29.029.029.029.00.290.290.290.290.290.29
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

shlx:Zydeco, shlx:ShellPipelineCompanyLP


Minority
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-31
Value7.57.57.50.0750.0750.0750.0750.0750.075
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners25.925.925.925.925.925.925.925.925.9

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners us-gaap:Ownership, us-gaap:PartnerTypeOfPartnersCapitalAccount

shlx:EconomicInterest, us-gaap:GeneralPartner


Minority
Period End2020-12-312020-06-302020-03-31
Value2.02.00.02
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners6.9689.76.9

us-gaap:MinorityInterestOwnershipPercentageByParent dei:LegalEntity, us-gaap:Ownership, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:MinorityInterestOwnershipPercentageByParent

shlx:ShellPipelineCompanyLP, shlx:Zydeco, shlx:Zydeco


Minority
Period End2021-04-30
Value7.5
Percentage of MinorityInterestOwnershipPercentageByParent100.0

us-gaap:MinorityInterestOwnershipPercentageByParent us-gaap:Ownership, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

shlx:Zydeco, shlx:Zydeco


Minority
Period End2021-04-302021-03-312020-12-312020-09-30
Value92.57.57.57.5
Percentage of MinorityInterestOwnershipPercentageByParent1233.30.00.00.0

us-gaap:NotesPayableRelatedPartiesNoncurrent

us-gaap:NotesPayableRelatedPartiesNoncurrent


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value2691269126922692269226922692269126912091209020902091871184410001265685686343344474580.0
Percentage of NotesPayableRelatedPartiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PartnersCapital

us-gaap:PartnersCapital


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value-469.0-490.0-481.0-437.0-403.0-799.0-775.0-783.0-792.0-281.0-282.4-307.1-343.3387-589.23.4-273.4116983783705479852345426417303214
Percentage of PartnersCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAttributableToNoncontrollingInterest

us-gaap:PartnersCapitalAttributableToNoncontrollingInterest


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value2.02323232425262625272523222223202020212222108108104991541610.0
Percentage of PartnersCapitalAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PreferredUnitsPreferredPartnersCapitalAccounts

us-gaap:PreferredUnitsPreferredPartnersCapitalAccounts


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value-1059000000.0-1059000000.0-1059000000.0-1059000000.0-1059000000.00
Percentage of PreferredUnitsPreferredPartnersCapitalAccounts100.0100.0100.0100.0100.00.0

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value8.0162410.06.013162.06.011151.55.28.8121.24.56.56.00.71.83.45.01.31.42.53.62.0
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-31
Value666674661
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-31
Value673686699
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-31
Value133213541356
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentOther

us-gaap:PropertyPlantAndEquipmentOther


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value35353434343333191818171717171715176.76.05.95.96.05.65.55.55.55.55.25.2
Percentage of PropertyPlantAndEquipmentOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligation


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2247232823662426249497810161029106996810051060129188
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation us-gaap:ProductOrService

shlx:CommittedShipperTransportation


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value442457497525553605632517590102147
Percentage of RevenueRemainingPerformanceObligation19.719.620.521.156.558.859.153.455.778.878.1

shlx:OperationAndMajorMaintenanceTerminalingServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value14641489150815331559
Percentage of RevenueRemainingPerformanceObligation65.264.063.763.262.5

shlx:Storage


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value23261819201.02.03.05.02.03.0
Percentage of RevenueRemainingPerformanceObligation1.01.10.70.82.00.10.20.30.51.51.6

shlx:StorageServices


Revenue
Period End2020-12-312019-12-312018-12-31
Value17214.0
Percentage of RevenueRemainingPerformanceObligation0.72.10.4

shlx:TerminalingServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2863233353423543663783833944064164182234
Percentage of RevenueRemainingPerformanceObligation12.713.914.214.114.237.437.237.236.941.941.439.517.618.2

shlx:TransportationServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3233472363739577404142539462.74.1
Percentage of RevenueRemainingPerformanceObligation1.41.419.91.51.54.056.83.93.84.353.74.42.12.2

shlx:TransportationServicesNonleaseServices


Revenue
Period End2020-12-312019-12-312018-12-31
Value344045
Percentage of RevenueRemainingPerformanceObligation1.43.94.5

us-gaap:UnamortizedDebtIssuanceExpense

us-gaap:UnamortizedDebtIssuanceExpense


Unamortized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value3000000.03000000.02000000.02000000.02000000.02000000.02000000.03000000.03000000.03000000.03300000.03500000.02500000.02700000.02900000.01300000.01500000.01600000.0900000.01000000.0500000.0500000.0600000.0
Percentage of UnamortizedDebtIssuanceExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnamortizedDebtIssuanceExpense us-gaap:RelatedPartyTransactionsByRelatedParty

srt:AffiliatedEntity


Unamortized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3000000.03000000.02000000.02000000.02000000.02000000.02000000.03000000.03000000.03000000.03000000.03500000.02900000.0
Percentage of UnamortizedDebtIssuanceExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.090.9100.0100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount


Unrecorded
Period End2020-12-312019-12-312018-12-31
Value1000000.05000000.08000000.0
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount100.0100.0100.0

Line plots across dimensions of each concept


Cost Ratio
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
(None, 'us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther')
Cost  Ratio us-gaap: Schedule Of Equity Method Investment Equity Method Investee Name, us-gaap: Equity Method Investment Nonconsolidated Investee
Net profit Margin
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
(None, 'us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther')
Net profit  Marginus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name, us-gaap: Equity Method Investment Nonconsolidated Investee
Operating Margin
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
(None, 'us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther')
Operating  Marginus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name, us-gaap: Equity Method Investment Nonconsolidated Investee
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:CostsAndExpenses
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
(None, 'us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther')
Costs And Expensesus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name, us-gaap: Equity Method Investment Nonconsolidated Investee
us-gaap:OperatingIncomeLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
(None, 'us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther')
Operating Income Lossus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name, us-gaap: Equity Method Investment Nonconsolidated Investee
us-gaap:ProfitLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
(None, 'us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther')
Profit Lossus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name, us-gaap: Equity Method Investment Nonconsolidated Investee
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:MajorCustomers, us-gaap:ProductOrService
('shlx:RelatedParties', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Major Customers, us-gaap: Product Or Service
us-gaap:Revenues
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
(None, 'us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther')
Revenuesus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name, us-gaap: Equity Method Investment Nonconsolidated Investee
us-gaap:Assets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
(None,)
Assetsus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name
us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
(None,)
Liabilities And Stockholders Equityus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name
us-gaap:AssetsCurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
(None,)
Assets Currentus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name
us-gaap:AccountsReceivableNetCurrent
us-gaap:MajorCustomers
(None,)
Accounts Receivable Net Currentus-gaap: Major Customers
us-gaap:AssetsNoncurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
(None,)
Assets Noncurrentus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name
us-gaap:ContractWithCustomerLiabilityCurrent
us-gaap:MajorCustomers
(None,)
Contract With Customer Liability Currentus-gaap: Major Customers
us-gaap:LiabilitiesCurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
(None,)
Liabilities Currentus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name
us-gaap:LiabilitiesNoncurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
(None,)
Liabilities Noncurrentus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
('shlx:ShellPipelineCompanyLP', None)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestdei: Legal Entity, us-gaap: Partner Type Of Partners Capital Account
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name
us-gaap:ProfitLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
(None, 'us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther')
Profit Lossus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name, us-gaap: Equity Method Investment Nonconsolidated Investee