LPX

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

Plots across concepts

IncomeStatement

Expenses

Balance Sheet

Assets

Current Assets

NonCurrent Assets

PropertyPlantAndEquipmentNet

Liabilities

Current Liabilities

Noncurrent Liabilities

Stockholders Equity

CashFlow

NetCashProvidedByUsedInOperatingActivities

NetCashProvidedByUsedInInvestingActivities

NetCashProvidedByUsedInFinancingActivities

OperatingLeaseLiability

NonoperatingIncomeExpense

LesseeOperatingLeaseLiabilityPaymentsDue

InventoryNet

AccountsReceivable

Tables

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:CommonStockValue	▁▂▃▄▄▄▄▅▆▆███████████████████████▇▇▇▇▇▇▇▇▆▆	114.0	121.0	124.0	129.0	130.0	130.0	130.0	135.0	141.0	141.4	153.4	153.4	153.4	153.4	153.4	153.4	153.4	153.4	153.4	153.1	153.1	153.1	153.0	153.0	152.8	152.8	152.8	152.0	152.0	152.0	152.0	152.0	150.7	150.4	150.4	150.4	149.9	149.8	149.8	149.8	145.0	144.8	144.8	NA	NA	NA
us-gaap:CommonStockSharesIssued	▁▄▅████	113.835024	121.153436	123.547974	129.665899	129.665899	129.665899	129.665899	NA	NA	NA	153.348542	NA	NA	NA	153.14719	NA	NA	NA	153.14719	NA	NA	NA	152.844949	NA	NA	NA	152.045461	NA	NA	NA	152.045461	NA	NA	NA	150.423999	NA	NA	NA	149.818301	NA	NA	NA	NA	NA	NA	NA
us-gaap:CommonStockSharesOutstanding	▁▄▅████	96.973031	104.234125	106.24003	112.170565	112.170565	112.170565	111.945021	NA	NA	NA	0.0	NA	NA	NA	144.895593	NA	NA	NA	143.169626	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding	▁█	102.0	107.0	NA	113.0	113.0	113.0	NA	122.2	124.3	131.5	NA	143.9	146.2	146.7	NA	146.5	146.2	145.9	NA	145.4	145.2	145.2	NA	142.6	142.3	142.0	NA	140.8	144.0	140.8	NA	144.0	144.1	144.4	NA	142.6	137.0	136.6	NA	134.5	131.4	131.3	NA	131.1	139.8	NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic	▁█	101.0	106.0	NA	112.0	112.0	112.0	NA	121.4	123.4	130.5	NA	142.5	144.6	144.7	NA	144.5	144.5	144.2	NA	143.7	143.4	142.9	NA	142.6	142.3	142.0	NA	140.8	140.8	140.8	NA	140.0	139.1	138.4	NA	137.1	137.0	136.6	NA	134.5	131.4	131.3	NA	131.1	128.5	NA
us-gaap:EarningsPerShareBasic	█▆▅▄▂▂▁▂▂▂▂▃▃▂▃▃▂▂▂▂▂▂▂▁▁▁▁▁▂▂▁▂▃▂▂▂▁▂▁▁▁▁▂▁▂▁	4.93	3.02	2.3200000000000003	1.58	0.29	0.29	-0.41	0.02	0.14	0.2	0.13999999999999968	0.87	1.13	0.63	0.9100000000000001	0.76	0.65	0.38	0.29000000000000004	0.46	0.22	0.07	-0.050000000000000044	-0.19	-0.14	-0.24	-0.3	-0.14	0.01	-0.1	-0.15	0.27	0.68	0.47	0.33	0.23	-0.27	-0.08	-0.42	-0.49	-0.27	-0.18	-0.04999999999999999	-0.24	0.17	-0.18
us-gaap:EarningsPerShareDiluted	█▆▅▄▂▂▁▂▂▂▂▃▃▂▃▃▂▂▂▂▂▂▂▁▁▁▁▁▂▂▁▂▂▂▂▂▁▂▁▁▁▁▂▁▂▁	4.9	3.0	2.31	1.57	0.29	0.29	-0.39999999999999997	0.02	0.14	0.2	0.14000000000000012	0.86	1.11	0.62	0.8900000000000001	0.75	0.65	0.38	0.29000000000000004	0.45	0.22	0.07	-0.050000000000000044	-0.19	-0.14	-0.24	-0.3	-0.14	0.01	-0.1	-0.15	0.26	0.65	0.45	0.32	0.22	-0.27	-0.08	-0.42	-0.49	-0.27	-0.18	-0.04999999999999999	-0.24	0.16	-0.18

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Operating Margin us-gaap:StatementBusinessSegments lpx:EWP		NA	NA	NA	103.0	79.0	99.0	NA	105.0	107.0	90.4	80.0	110.0	113.0	105.8	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Operating Margin us-gaap:StatementBusinessSegments lpx:Siding		NA	NA	NA	268.0	220.0	212.0	NA	259.0	238.0	235.6	213.0	241.0	262.0	227.0	212.8	226.2	231.0	214.0	169.0	194.8	207.2	181.3	141.2	157.8	163.9	173.5	140.9	163.2	169.7	143.5	138.3	149.0	152.7	133.8	116.7	134.1	137.0	113.1	93.0	112.0	118.6	106.2	102.8	104.6	130.6	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
TTM Greenblatt ROC _ _	█▆▅▄▂▂▁▂▂▂▂▃▄▃▃▃▃▂▂▂▂▂▂▂▂▁▁▂▂▂▁▂▃▃▂▂▂▂▁▁▁▂▂	653.0	431.0	297.0	242.0	53.0	44.0	-73.0	8.0	23.0	21.7	16.3	167.6	215.0	127.2	159.0	158.9	132.9	72.7	56.0	76.9	52.2	18.9	1.4	-17.4	-14.1	-33.2	-48.9	-14.6	-3.9	-10.2	-21.9	47.6	88.9	89.2	47.0	43.5	19.0	-2.1	-25.6	-72.7	-23.6	-18.2	-17.9	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:ComprehensiveIncomeNetOfTax	█▆▅▄▂▂▁▂▂▂▂▃▄▃▄▃▃▃▃▃▂▂▂▂▂▂▁▂▂▂▂▂▃▃▃▂▂▂▁▁▂▂▂▂▂▂	506.0	314.0	275.0	182.0	33.0	11.0	-53.0	-7.0	19.0	28.7	18.6	123.3	150.3	94.8	137.9	121.2	86.9	59.0	39.5	66.2	36.5	16.5	-7.4	-36.3	-18.6	-40.6	-78.1	-28.5	3.7	-14.6	0.2	39.1	87.6	68.9	40.0	34.9	-41.9	-5.9	-84.2	-88.0	-29.3	-21.7	-24.5	-21.4	19.8	-17.9
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest		NA	-1.0	NA	NA	-2.0	0.0	NA	-1.0	-2.0	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.0	0.0	0.0	0.0	0.0	0.0	0.1	0.1	0.2	0.3	0.1	-0.2
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	█▆▅▄▂▂▁▂▂▂▂▃▄▃	505.0	313.0	275.0	182.0	31.0	11.0	-54.0	-9.0	17.0	28.3	19.0	123.0	150.0	94.8	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:CostOfGoodsAndServicesSold	█▆▆▆▄▅▅▆▆▆▆▆▇▆▅▅▅▅▄▄▄▄▄▄▄▄▄▅▅▃▄▄▄▃▃▃▃▂▁▂▂▂▁▁▃▁	619.0	538.0	509.0	503.0	431.0	477.0	467.0	529.0	510.0	500.8	495.3	524.0	550.2	514.5	461.9	479.3	485.7	455.0	422.8	442.6	443.1	415.5	395.3	416.2	443.4	427.8	430.9	477.0	461.5	388.4	415.2	416.3	422.7	392.6	360.6	369.3	359.9	313.3	290.9	322.0	336.3	295.0	284.5	289.1	346.3	268.0
us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal		NA	NA	NA	2.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:GainsLossesOnExtinguishmentOfDebt	▁█	0.0	11.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.0	0.0	NA	NA	-4.1	-13.2	NA	NA	0.0	0.0	NA	NA	0.0	0.0	NA	NA	-1.5	-0.8	0.0	NA	0.0	0.0	-52.2	NA	0.0	0.0	0.0	NA	NA	NA	NA	NA
us-gaap:GrossProfit	█▅▄▃▂▁▁▁▁▁▁▃▃▂▃▃▂▂	707.0	479.0	350.0	292.0	117.0	108.0	70.0	75.0	78.0	80.8	93.8	212.8	260.6	176.8	214.8	210.6	182.3	128.1	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperations		NA	NA	46.0	273.0	97.0	83.0	-51.0	2.0	17.0	26.8	17.1	124.1	162.9	94.9	130.7	110.9	94.5	55.0	NA	65.6	NA	NA	NA	-24.6	NA	NA	-43.0	-18.3	2.1	-14.2	-19.1	37.5	94.2	65.4	49.1	31.4	-37.2	-11.2	-56.8	-59.3	-33.0	-23.0	-2.6	-31.2	23.5	NA
us-gaap:IncomeLossFromContinuingOperations us-gaap:StatementBusinessSegments lpx:EWP		NA	NA	NA	9.0	3.0	9.0	NA	6.0	10.0	7.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperations us-gaap:StatementBusinessSegments lpx:Osb		NA	NA	NA	189.0	46.0	35.0	NA	-1.0	-3.0	8.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperations us-gaap:StatementBusinessSegments lpx:Siding		NA	NA	NA	76.0	51.0	42.0	NA	44.0	45.0	39.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperations us-gaap:StatementBusinessSegments srt:SouthAmerica		NA	NA	NA	11.0	11.0	7.0	NA	7.0	9.0	10.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperations us-gaap:StatementBusinessSegments us-gaap:AllOtherSegments		NA	NA	NA	-5.0	-5.0	-3.0	NA	-1.0	-1.0	1.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperations us-gaap:StatementBusinessSegments us-gaap:Corporate		NA	NA	NA	-7.0	-9.0	-7.0	NA	-6.0	-7.0	-7.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	█▆▅▄▂▂▁▂▂▂▂▃▄▃▃▃▃▂▂▂▂▂▂▁▂▁▁▂▂▂▁▂▃▃▂▂▁▂▁▁▁▂▂▁▂▁	644.0	416.0	292.0	237.0	50.0	42.0	-79.0	3.0	19.0	33.6	17.7	167.0	214.7	124.6	155.8	156.3	128.8	69.4	48.6	56.7	46.4	13.2	-5.0	-29.0	-19.9	-41.5	-55.5	-23.3	-5.8	-20.4	-30.3	41.9	114.5	81.4	56.8	37.3	-45.5	-10.6	-49.6	-74.2	-33.9	-26.4	-7.6	-43.6	35.4	-32.1
us-gaap:IncomeTaxExpenseBenefit	▁▂█▃▃▄▃▄▄▄▄▅▅▄▄▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▄▄▄▄▄▄	-147.0	-96.0	213.0	-60.0	-19.0	-9.0	-26.0	3.0	3.0	7.2	-0.7	41.8	51.2	29.7	21.2	46.4	36.0	15.5	6.7	-7.5	16.2	4.4	5.0	-2.4	1.0	-6.3	-11.3	-3.6	-6.7	-5.6	-10.5	4.4	24.4	23.2	12.0	7.9	-11.1	-1.2	-3.0	-20.9	-8.4	-6.8	-8.1	-16.4	12.7	-10.3
us-gaap:IncomeTaxesPaid		NA	NA	NA	45.0	0.0	0.0	-9.0	0.0	7.0	21.0	16.9	32.0	37.0	3.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeTaxesPaidNet	█▁	200.0	21.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:InterestExpense	▃▃▁▃▃▃▃▃▃▃▂▃▃▃▃▃▃▃▃▅▅▄▄▄▄▄▄▄▄▄▄▄▅▅▆▅▆▆▇▇▇▇▇▇██	4.0	5.0	0.0	5.0	6.0	6.0	4.0	5.0	5.0	3.8	3.1	3.9	4.4	4.4	4.5	4.9	4.9	5.0	5.8	9.0	9.3	8.0	8.1	8.4	7.2	7.5	6.4	8.3	7.4	7.7	8.0	7.6	9.8	10.6	12.9	10.7	13.1	12.6	14.3	14.2	14.4	14.0	14.1	15.3	17.7	16.8
us-gaap:InterestPaidNet	▁█	0.0	9.0	NA	NA	2.0	10.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:NetIncomeLoss	█▆▅▄▂▂▁▂▂▂▂▃▄▃▃▃▃▂▂▃▂▂▂▁▂▁▁▂▂▂▂▂▃▃▂▂▁▂▁▁▁▂▂▁▂▂	498.0	320.0	256.0	177.0	33.0	33.0	-51.0	2.0	17.0	26.7	17.0	124.0	162.7	90.9	130.6	109.8	94.5	55.0	42.2	65.6	31.7	10.3	-7.6	-26.5	-19.5	-34.5	-42.9	-20.4	2.1	-14.2	-20.4	38.1	94.1	65.3	46.1	31.3	-37.3	-11.3	-57.2	-65.6	-35.5	-23.0	-6.8	-32.0	22.3	-22.5
us-gaap:NonoperatingIncomeExpense		NA	NA	NA	0.0	-1.0	5.0	-6.0	-5.0	-4.0	11.9	1.4	-0.6	-0.3	-2.6	-3.2	-2.6	-4.1	-3.3	-7.4	-20.2	-5.8	-5.7	-6.4	-11.6	-5.8	-8.3	-1.3	-8.7	-1.9	-10.2	-2.3	-5.7	25.6	-7.8	19.6	-6.2	-64.5	-8.5	0.6	-1.5	-10.3	-8.2	10.3	-27.7	-13.5	-9.4
us-gaap:OperatingIncomeLoss	█▆▅▄▂▂▁▂▂▂▂▃▄▃▃▃▃▂▂▂▂▂▂▂▂▁▁▂▂▂▁▂▃▃▂▂▂▂▁▁▁▂▂▂▂▁	653.0	431.0	297.0	242.0	53.0	44.0	-73.0	8.0	23.0	21.7	16.3	167.6	215.0	127.2	159.0	158.9	132.9	72.7	56.0	76.9	52.2	18.9	1.4	-17.4	-14.1	-33.2	-48.9	-14.6	-3.9	-10.2	-21.9	47.6	88.9	89.2	47.0	43.5	19.0	-2.1	-25.6	-72.7	-23.6	-18.2	-17.9	-15.9	48.9	-22.7
us-gaap:OtherComprehensiveIncomeLossNetOfTax	█▁	8.0	-6.0	NA	NA	0.0	-22.0	NA	-9.0	2.0	2.0	1.6	-1.0	-12.0	3.9	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	-35.2	-8.1	1.6	-0.4	20.6	1.0	-6.5	3.6	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OtherNonoperatingIncomeExpense	█▁	-6.0	-10.0	NA	0.0	-1.0	5.0	-2.0	-1.0	-2.0	11.0	0.4	-2.2	-0.7	-1.4	-2.0	-0.6	-1.5	-0.3	-16.6	-0.5	1.4	0.5	0.2	-3.7	0.4	-2.2	-23.5	-18.5	-20.7	-27.3	-28.1	-22.1	-21.3	-22.6	-22.4	-18.1	-18.2	-20.1	-16.9	-15.2	-16.5	-17.8	-18.4	-17.0	-18.2	NA
us-gaap:ProfitLoss	█▆▅▄▂▂▁▂▂▂▂▃▄▃	497.0	320.0	256.0	177.0	31.0	33.0	-52.0	1.0	16.0	26.3	16.6	124.0	163.0	91.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	-42.9	-21.2	0.6	-14.2	-20.4	38.1	94.3	65.1	46.1	31.3	-37.3	-11.3	-57.2	-65.6	-35.4	-22.9	-6.6	-31.7	22.4	-22.7
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax	█▆▅▄▃▃▃▃▃▃▃▄▄▄▄▄▄▃▃▃▃▂▂▂▂▂▂▃▃▂▂▂▃▃▂▂▂▁▁▁▁▁▁▁▂▁	1325.0	1017.0	860.0	795.0	548.0	585.0	537.0	603.0	588.0	581.6	589.1	736.8	810.8	691.3	710.6	718.3	694.1	610.9	550.0	596.4	582.4	504.6	462.9	464.9	493.0	471.7	453.5	518.1	518.5	444.7	479.7	507.4	572.6	537.5	458.7	467.8	427.8	361.5	312.2	350.6	362.4	331.7	316.3	322.8	447.5	297.0
us-gaap:Revenues	█▆▅▄▃▃▃▃▃▃▃▄▄▄▄▄▄▃▃▃▃▂▂▂▂▂▂▃▃▂▂▂▃▃▂▂▂▁▁▁▁▁▁▁▂▁	1325.0	1017.0	860.0	795.0	548.0	585.0	537.0	603.0	588.0	581.6	589.0	737.0	811.0	691.3	710.7	718.3	694.1	610.9	550.0	596.4	582.4	504.6	462.9	464.9	493.0	471.7	453.5	518.1	518.5	444.7	479.7	507.4	572.6	537.5	458.7	467.8	427.8	361.5	312.2	350.6	362.4	331.7	316.3	322.8	447.5	297.0
us-gaap:SellingGeneralAndAdministrativeExpense	█▆▇▇▆▇█████▆▆▆▅▆▆▆▆▆▅▅▄▄▄▄▄▂▃▄▅▃▃▃▃▂▂▂▁▁▁▂▂▁▂▂	57.0	48.0	54.0	52.0	50.0	55.0	58.0	58.0	58.0	56.7	57.4	51.2	50.1	50.6	45.6	49.2	47.0	48.6	47.8	47.0	46.5	42.3	37.9	38.3	37.9	38.7	40.8	31.9	35.9	40.9	46.6	33.5	35.5	35.4	36.8	30.6	30.7	31.3	28.3	26.5	27.6	28.8	31.6	27.7	29.4	30.1

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:Assets	▆▆▃▂▁▄▁▃▃▃▇██▇▇▅▄▃▃▆▅▅▄▄▅▅▆▆▆▇▇▇█▇▆▅▅▄▄▄▆▆▆	2367.0	2343.0	2086.0	1973.0	1807.0	2132.0	1835.0	2043.0	2090.0	2094.3	2514.1	2614.4	2620.8	2499.2	2448.5	2308.0	2162.8	2080.2	2031.2	2432.4	2273.9	2215.6	2176.3	2209.5	2236.3	2299.0	2353.5	2409.6	2432.3	2494.1	2493.3	2497.5	2571.9	2472.1	2331.0	2313.4	2256.2	2147.2	2139.9	2203.1	2336.4	2392.0	2410.6	NA	NA	NA
us-gaap:Liabilities	▄▄▂▁▁█▂	925.0	930.0	842.0	820.0	796.0	1138.0	834.0	NA	NA	NA	814.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LiabilitiesAndStockholdersEquity	▆▆▃▂▁▄▁▃▃▃▇██▇▇▅▄▃▃▆▅▅▄▄▅▅▆▆▆▇▇▇█▇▆▅▅▄▄▄▆▆▆	2367.0	2343.0	2086.0	1973.0	1807.0	2132.0	1835.0	2043.0	2090.0	2094.0	2514.1	2614.4	2620.8	2499.2	2448.5	2308.0	2162.8	2080.2	2031.2	2432.4	2273.9	2215.6	2176.3	2209.5	2236.3	2299.0	2353.5	2409.6	2432.3	2494.1	2493.3	2497.5	2571.9	2472.1	2331.0	2313.4	2256.2	2147.2	2139.9	2203.1	2336.4	2392.0	2410.6	NA	NA	NA
us-gaap:StockholdersEquity	▅▅▃▃▁▁▁▃▄▄▇██▇▆▅▄▃▃▃▂▂▁▂▂▂▂▃▃▃▃▃▃▂▂▁▁▁▁▂▃▃▃	1433.0	1404.0	1234.0	1142.0	1000.0	984.0	991.0	1213.0	1278.0	1272.6	1700.2	1811.4	1765.8	1672.4	1604.5	1465.3	1348.4	1254.1	1195.7	1152.8	1084.3	1051.8	1017.0	1023.1	1056.8	1075.1	1115.8	1191.7	1217.8	1211.7	1226.3	1223.8	1182.5	1092.9	1033.8	992.9	956.0	995.9	1000.9	1084.4	1171.1	1198.9	1217.8	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:AssetsCurrent	▆▆▄▃▂▄▁▂▃▃▇███▇▇▅▅▄█▃▃▂▃▃▄▄▄▄▄▄▅▅▅▄▄▃▁▁▂▂▂▂	1230.0	1226.0	993.0	904.0	689.0	976.0	619.0	761.0	828.0	845.5	1287.2	1426.5	1462.6	1405.6	1359.6	1290.8	1155.7	1074.0	1016.5	1445.8	876.1	815.6	769.1	840.8	870.8	928.8	950.3	982.7	982.3	1039.8	1034.2	1059.0	1137.4	1143.1	995.6	963.4	903.8	678.2	656.8	690.8	691.4	722.0	713.6	NA	NA	NA
us-gaap:CashAndCashEquivalentsAtCarryingValue	▄▅▄▃▂▄▁▂▂▃▇██▇▇▇▆▅▅▄▄▃▃▃▄▃▄▄▄▄▅▅▅▄▄▄▃▂▂▃▂▂▃▃▃▃	590.0	645.0	535.0	420.0	259.0	488.0	181.0	304.0	348.0	361.1	878.4	986.7	1000.9	895.7	928.0	848.7	740.0	649.5	659.3	559.7	474.8	404.2	434.7	447.7	481.0	468.3	532.7	579.9	554.7	551.7	656.8	669.5	630.7	560.5	560.9	490.5	427.1	280.5	340.0	360.1	334.0	321.2	389.3	382.1	437.1	357.4
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	▄▅▄▃▂▄▁▂▂▃▇██▇▇▇▆▅▅	603.0	658.0	535.0	420.0	259.0	488.0	195.0	318.0	362.0	375.0	891.8	1000.0	1014.2	909.1	941.3	861.9	753.2	662.6	672.5	NA	NA	NA	449.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AccountsReceivableNetCurrent	█▆▄▅▄▃▃▄▄▃▂▃▃▃▃▃▃▃▁▂▃▃▁▂▂▂▁	310.0	264.0	184.0	228.0	175.0	172.0	164.0	183.0	177.0	165.9	127.6	143.5	162.3	149.3	142.5	171.4	153.8	149.1	108.3	138.0	151.4	146.4	96.4	120.0	124.6	137.2	108.4	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:ReceivablesNetCurrent	█▇▄▆▄▄▄▄▄▄▃▃▄▃▃▄▄▃▂▃▃▃▂▃▃▃▂▃▃▃▁▂▂▃▁▂▂▂▁▂▂▂▁	310.0	264.0	184.0	228.0	175.0	172.0	164.0	183.0	177.0	165.9	127.6	143.5	162.3	149.3	142.5	171.4	153.8	149.1	108.3	138.0	151.4	146.4	96.4	120.0	124.6	137.2	108.4	142.6	145.4	143.0	78.1	109.2	103.5	135.8	80.9	104.6	99.6	107.4	65.1	86.2	93.0	98.6	66.8	NA	NA	NA
us-gaap:InventoryNet	▇▇▅▄▄▆▅▅▇▇▆▆▆█▅▄▄▅▄▄▄▅▄▄▄▅▄▄▄▆▄▄▅▅▃▃▃▃▁▁▂▃▁	311.0	307.0	259.0	238.0	240.0	284.0	265.0	260.0	293.0	309.8	273.0	284.4	286.4	329.4	259.1	231.0	221.7	260.0	234.6	227.1	231.6	250.1	222.0	230.5	224.9	262.1	229.8	218.3	235.6	276.3	224.4	225.0	247.0	255.1	209.8	209.3	203.5	212.3	163.6	156.0	173.9	202.7	151.9	NA	NA	NA
us-gaap:MachineryAndEquipmentGross		NA	NA	1971.0	NA	NA	NA	1965.0	NA	NA	NA	1949.0	NA	NA	NA	1977.4	NA	NA	NA	1881.8	NA	NA	NA	1897.4	NA	NA	NA	1838.8	NA	NA	NA	1794.5	NA	NA	NA	1642.1	NA	NA	NA	1636.5	NA	NA	NA	1702.2	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:NoncurrentAssets		NA	NA	977.0	NA	NA	NA	1034.0	NA	NA	NA	1073.0	NA	NA	NA	982.0	NA	NA	NA	938.0	NA	NA	NA	916.0	NA	NA	NA	918.0	NA	NA	NA	940.0	NA	NA	NA	784.0	NA	NA	NA	841.0	NA	NA	NA	NA	NA	NA	NA
us-gaap:NoncurrentAssets us-gaap:StatementGeographical country:CA		NA	NA	367.0	NA	NA	NA	390.0	NA	NA	NA	449.0	NA	NA	NA	380.0	NA	NA	NA	365.0	NA	NA	NA	360.0	NA	NA	NA	329.0	NA	NA	NA	313.0	NA	NA	NA	144.0	NA	NA	NA	158.0	NA	NA	NA	NA	NA	NA	NA
us-gaap:NoncurrentAssets us-gaap:StatementGeographical country:US		NA	NA	533.0	NA	NA	NA	570.0	NA	NA	NA	540.0	NA	NA	NA	529.0	NA	NA	NA	516.0	NA	NA	NA	506.0	NA	NA	NA	523.0	NA	NA	NA	544.0	NA	NA	NA	540.0	NA	NA	NA	576.0	NA	NA	NA	NA	NA	NA	NA
us-gaap:NoncurrentAssets us-gaap:StatementGeographical srt:SouthAmerica		NA	NA	77.0	NA	NA	NA	74.0	NA	NA	NA	82.0	NA	NA	NA	69.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross		NA	NA	2562.0	NA	NA	NA	2529.0	NA	NA	NA	2595.6	NA	NA	NA	2586.1	2472.3	2436.2	2426.4	2410.8	2459.2	2434.7	2411.8	2392.5	2346.6	2327.4	2313.3	2315.1	2299.4	2311.1	2305.5	2294.6	2214.3	2218.0	2073.3	2061.6	2066.8	2027.8	2033.4	2028.1	2039.2	2124.9	2112.7	2112.5	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:Timber		NA	NA	18.0	NA	NA	NA	25.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:ConstructionInProgressGross		NA	NA	63.0	NA	NA	NA	46.0	NA	NA	NA	148.1	NA	NA	NA	98.5	NA	NA	NA	48.7	NA	NA	NA	33.5	NA	NA	NA	18.6	NA	NA	NA	46.1	NA	NA	NA	22.2	NA	NA	NA	5.5	NA	NA	NA	4.8	NA	NA	NA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment		NA	NA	1644.0	NA	NA	NA	1564.0	NA	NA	NA	1585.2	NA	NA	NA	1660.0	1599.6	1569.4	1549.5	1527.6	1603.9	1579.3	1554.5	1530.1	1518.2	1503.3	1483.0	1464.4	1443.4	1432.8	1422.5	1407.8	1350.3	1341.1	1327.3	1310.8	1314.6	1278.8	1264.3	1245.9	1246.8	1237.9	1213.5	1195.4	NA	NA	NA
us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:DevelopedTechnologyRights	▁█	0.0	1.0	NA	1.0	0.0	0.0	NA	NA	1.0	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:ProductiveLand	▄▄	1.0	1.0	NA	1.0	1.0	1.0	NA	NA	1.0	-1.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentNet	▆▅▅▅▅▅▆███▇▇▆▅▅▄▄▄▄▄▄▄▄▃▃▃▄▄▄▄▄▄▄▁▁▁▁▂▂▂▄▅▅	938.0	921.0	918.0	902.0	912.0	930.0	965.0	1034.0	1038.0	1031.2	1010.4	976.2	946.6	932.1	926.1	872.7	866.8	876.9	883.2	855.3	855.4	857.3	862.4	828.4	824.1	830.3	850.7	856.0	878.3	883.0	886.8	864.0	876.9	746.0	750.8	752.2	749.0	769.1	782.2	792.4	887.0	899.2	917.1	NA	NA	NA
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	▁▁▂▂▂▂▁▁▁▁▄▄▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▆▅▅▆▆▆▇███	10.0	9.0	11.0	12.0	11.0	12.0	10.0	10.0	9.0	9.3	49.4	52.6	53.9	8.5	7.8	7.4	7.2	6.8	6.2	7.4	7.4	7.2	7.7	7.4	7.1	5.7	5.0	6.4	5.0	3.8	3.2	4.2	4.3	73.5	68.6	70.4	76.7	79.9	79.1	98.8	103.4	108.5	110.0	NA	NA	NA
us-gaap:Goodwill	▇▇▇▇▇████▇▅▇▇▇▅▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁	25.0	25.0	25.0	25.0	25.0	30.0	30.0	30.0	30.0	26.0	16.1	26.3	26.4	26.6	16.1	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	0.0	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IntangibleAssetsNetExcludingGoodwill		NA	NA	56.0	NA	NA	NA	61.0	NA	NA	NA	51.0	NA	NA	NA	55.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.6	0.8	1.0	1.2	1.4	1.6	1.8	2.0	2.2	NA	NA	NA
us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:LicensingAgreements		NA	NA	34.0	NA	NA	NA	38.0	NA	NA	NA	41.0	NA	NA	NA	44.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:TechnologyBasedIntangibleAssets		NA	NA	19.0	NA	NA	NA	20.0	NA	NA	NA	10.0	NA	NA	NA	11.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:Trademarks		NA	NA	3.0	NA	NA	NA	3.0	NA	NA	NA	0.0	NA	NA	NA	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:StatementGeographical,us-gaap:FiniteLivedIntangibleAssetsByMajorClass country:CA,us-gaap:LicensingAgreements		NA	NA	91.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:DevelopedTechnologyRights	▆▆▆▆▇▇▇▇▇█▁	18.0	18.0	19.0	19.0	20.0	20.0	20.0	21.0	21.0	22.0	10.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:OtherIntangibleAssets	▆▆████████▁	2.0	2.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.1	0.1	0.1	0.1	0.1	0.1	NA	0.1	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IntangibleAssetsNetIncludingGoodwill	▁▁▁▂▂▄▄▄▃▂█	45.0	45.0	46.0	47.0	48.0	53.0	53.0	54.0	51.0	47.8	66.9	NA	NA	NA	70.6	NA	NA	NA	56.8	NA	NA	NA	60.1	NA	NA	NA	74.6	NA	NA	NA	77.8	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:DeferredTaxAssetsLiabilitiesNet		NA	NA	65.0	NA	NA	NA	71.0	NA	NA	NA	63.3	NA	NA	NA	103.9	NA	NA	NA	160.4	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OperatingLeaseRightOfUseAsset	▇▇▇▇████▄▅▁	37.0	39.0	40.0	40.0	42.0	43.0	44.0	41.0	22.0	22.5	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OtherAssetsNoncurrent	▂▂▂▂▅▆▇█▇▆▆▆▆▅▅▅▅▂▂▂▂▂▂▂▂▁▁▄▄▃▃▃▁▁▁▂▂▂▂▂▂▂▂	26.0	24.0	24.0	20.0	50.0	62.0	69.0	82.0	68.0	65.3	61.2	59.8	59.5	56.6	56.8	57.2	56.1	23.4	22.4	22.4	22.9	22.8	23.0	21.4	22.5	17.3	17.3	45.2	45.7	34.7	33.8	33.8	15.7	16.0	14.9	27.0	26.0	26.2	24.9	23.6	25.9	25.8	24.9	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	█▆▆▅▄▄▅▄▅▅▅▄▄▃▅▄▄▄▅▄▃▂▂▂▂▃▃▃▂▄▂▃▃▂▂▃▂▂▁▁▁▁▁	315.0	262.0	267.0	242.0	204.0	208.0	242.0	213.0	223.0	228.9	233.3	213.7	211.1	187.5	237.1	212.5	203.7	210.5	222.8	193.8	173.5	161.9	139.6	162.5	149.2	182.4	168.3	171.9	154.1	192.7	161.9	173.5	165.2	154.6	139.5	165.5	150.6	142.9	122.3	129.1	127.3	131.3	127.8	NA	NA	NA
us-gaap:AccruedIncomeTaxesCurrent	▃█▁	36.0	97.0	18.0	NA	13.0	6.0	0.0	1.0	1.0	1.1	21.0	11.6	15.7	21.6	4.5	7.4	NA	NA	31.3	NA	NA	NA	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.0	NA	NA	NA	0.1	NA	NA	NA	0.1	NA	NA	NA
us-gaap:AccruedLiabilitiesCurrent		NA	NA	44.0	NA	NA	NA	34.0	NA	NA	NA	30.1	27.5	23.5	18.7	24.2	NA	NA	NA	19.3	NA	NA	NA	13.7	NA	NA	NA	15.9	NA	NA	NA	9.1	NA	NA	NA	8.7	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LiabilitiesCurrent	▄▄▃▂▂▂▂▂▂▂▃▂▃▂▃▂▂▂▂█▂▁▁▁▁▂▂▂▁▂▁▂▃▃▂▃▃▁▁▁▁▁▁	353.0	360.0	286.0	244.0	219.0	214.0	244.0	216.0	229.0	237.6	261.6	232.8	257.5	237.6	270.1	245.8	230.6	215.5	228.8	653.2	176.9	165.3	143.0	166.7	153.4	186.6	172.7	176.2	158.4	197.0	166.2	177.8	264.7	254.5	239.3	275.2	259.0	161.4	139.5	143.7	141.7	138.4	135.0	NA	NA	NA
us-gaap:OperatingLeaseLiabilityCurrent		NA	NA	8.0	NA	NA	NA	8.0	NA	NA	NA	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OtherAccruedLiabilitiesCurrent		NA	NA	13.0	NA	NA	NA	14.0	NA	NA	NA	9.7	NA	NA	NA	6.8	NA	NA	NA	5.6	NA	NA	NA	5.6	NA	NA	NA	18.0	NA	NA	NA	7.7	NA	NA	NA	16.0	NA	NA	NA	15.0	NA	NA	NA	19.6	NA	NA	NA
us-gaap:OtherLiabilitiesCurrent	▁▁▁██	1.0	1.0	1.0	2.0	2.0	NA	2.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:TaxesPayableCurrent		NA	NA	15.0	NA	NA	NA	7.0	NA	NA	NA	4.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:LongTermDebt		NA	NA	348.0	NA	NA	NA	348.0	NA	NA	NA	351.9	NA	NA	NA	375.9	NA	NA	NA	377.0	832.4	NA	NA	757.8	NA	NA	NA	761.9	NA	NA	NA	765.0	765.6	874.8	880.1	880.5	891.1	888.8	733.8	729.1	726.8	719.7	NA	714.7	NA	NA	NA
us-gaap:LongTermDebt us-gaap:DebtInstrument lpx:Seniorunsecurednotesmaturing2024		NA	NA	348.0	NA	NA	NA	347.0	NA	NA	NA	346.3	NA	NA	NA	345.6	NA	NA	NA	345.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LongTermDebt us-gaap:LongtermDebtType us-gaap:OtherDebtSecurities		NA	NA	1.0	NA	NA	NA	1.0	NA	NA	NA	1.0	NA	NA	NA	0.7	NA	NA	NA	1.3	1.4	NA	NA	0.3	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LongTermDebtNoncurrent		NA	NA	348.0	NA	NA	NA	348.0	NA	348.0	347.4	346.9	348.6	348.4	351.1	350.8	353.0	352.6	374.6	374.4	374.3	745.2	751.8	751.8	751.7	753.6	757.9	759.5	759.2	761.3	761.2	762.7	763.3	777.3	782.2	782.7	785.4	784.4	719.3	715.9	716.2	716.8	716.1	714.5	NA	NA	NA
us-gaap:LongTermDebtAndCapitalLeaseObligations	▁▁▁▁▁█▁▁	346.0	346.0	351.0	348.0	348.0	698.0	348.0	348.0	NA	NA	347.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:DeferredIncomeTaxLiabilitiesNet	█▆▅▃▃▁▃	88.0	82.0	78.0	72.0	71.0	65.0	73.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent		NA	NA	17.0	NA	NA	NA	23.0	NA	NA	NA	23.3	NA	NA	NA	68.9	NA	NA	NA	92.7	NA	NA	NA	90.2	NA	NA	NA	93.8	NA	NA	NA	52.2	NA	NA	NA	92.9	NA	NA	NA	93.0	NA	NA	NA	61.6	NA	NA	NA
us-gaap:OtherLiabilitiesNoncurrent	▂▂▁▃▃▃▃█▃▃▃▄▆▆▆▆▆▇▆▄▅▄▄▄▄▄▄▃▃▃▄▅▆▅▅▄▄▄▅▃▃▃▃	97.0	99.0	86.0	124.0	125.0	127.0	125.0	223.0	126.0	130.5	134.7	138.7	180.8	184.0	178.0	180.3	181.3	195.0	191.9	150.7	155.0	145.8	149.5	141.1	142.7	147.6	153.8	127.8	133.9	133.8	136.1	171.8	181.8	166.6	168.8	140.7	142.4	145.5	160.4	121.1	130.6	128.8	129.8	NA	NA	NA
us-gaap:OperatingLeaseLiabilityNoncurrent	▇▇▇▇▇██▇▄▄▁	29.0	30.0	32.0	32.0	33.0	34.0	36.0	33.0	14.0	14.3	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo		NA	NA	7.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree		NA	NA	4.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour		NA	NA	3.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive		NA	NA	2.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive		NA	NA	27.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:StockholdersEquity	▅▅▃▃▁▁▁▃▄▄▇██▇▆▅▄▃▃▃▂▂▁▂▂▂▂▃▃▃▃▃▃▂▂▁▁▁▁▂▃▃▃	1433.0	1404.0	1234.0	1142.0	1000.0	984.0	991.0	1213.0	1278.0	1272.6	1700.2	1811.4	1765.8	1672.4	1604.5	1465.3	1348.4	1254.1	1195.7	1152.8	1084.3	1051.8	1017.0	1023.1	1056.8	1075.1	1115.8	1191.7	1217.8	1211.7	1226.3	1223.8	1182.5	1092.9	1033.8	992.9	956.0	995.9	1000.9	1084.4	1171.1	1198.9	1217.8	NA	NA	NA
us-gaap:CommonStockValue	▁▂▃▄▄▄▄▅▆▆███████████████████████▇▇▇▇▇▇▇▇▆▆	114.0	121.0	124.0	129.0	130.0	130.0	130.0	135.0	141.0	141.4	153.4	153.4	153.4	153.4	153.4	153.4	153.4	153.4	153.4	153.1	153.1	153.1	153.0	153.0	152.8	152.8	152.8	152.0	152.0	152.0	152.0	152.0	150.7	150.4	150.4	150.4	149.9	149.8	149.8	149.8	145.0	144.8	144.8	NA	NA	NA
us-gaap:AdditionalPaidInCapitalCommonStock	▄▄▄▄▄▄▄▄▁▁▄▄▄▄▅▅▅▅▅▅▅▅▆▆▆▆▆▆▆▆▆▆▆▆▇▇▇▇█████	446.0	443.0	452.0	450.0	446.0	448.0	454.0	453.0	374.0	372.9	458.2	456.5	457.5	462.7	470.6	470.0	475.2	469.0	478.2	475.7	475.2	492.7	496.5	497.4	495.2	501.5	507.0	506.3	503.9	502.3	508.0	505.7	504.9	503.8	533.6	536.5	539.5	538.7	549.9	554.6	557.8	562.2	559.4	NA	NA	NA
us-gaap:RetainedEarningsAccumulatedDeficit	▇▆▅▅▄▃▃▅▆▆██▇▆▆▅▄▃▃▃▂▂▂▂▂▂▂▃▃▃▃▃▃▂▂▁▁▁▁▂▂▂▃	1413.0	1390.0	1206.0	1132.0	999.0	983.0	966.0	1185.0	1315.0	1314.3	1612.6	1613.9	1508.4	1364.4	1280.1	1149.5	1039.8	945.3	890.3	848.1	782.5	750.8	724.2	731.8	758.3	777.8	812.3	855.2	875.6	873.5	887.7	908.1	870.0	775.9	710.6	664.5	633.2	670.5	681.8	739.0	804.6	840.1	863.1	NA	NA	NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax	▃▂▂▁▁▁▂▂▃▃▃▃▃▃▄▄▃▃▃▃▃▃▃▃▃▃▄▆▆▆▆▅▅▅▅▅▅▅▅▇█▇▇	-149.0	-157.0	-151.0	-170.0	-175.0	-175.0	-153.0	-152.0	-143.0	-144.4	-146.4	-148.0	-147.3	-134.9	-122.1	-129.4	-140.8	-133.2	-137.2	-134.5	-135.1	-139.9	-146.1	-146.3	-136.5	-137.4	-131.3	-96.1	-88.0	-89.6	-89.2	-109.8	-110.8	-104.3	-107.9	-101.8	-105.4	-100.8	-106.2	-79.2	-56.5	-68.3	-69.6	NA	NA	NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedDefinedBenefitPlansAdjustment	███▆▅▅▅▄▄▄▃▁▁	-80.0	-81.0	-81.0	-86.0	-87.0	-88.0	-89.0	-90.0	-91.0	-92.0	-93.0	-98.0	-99.0	NA	-84.0	NA	NA	NA	-93.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss	▄▄▄	-2.0	-2.0	-2.0	NA	0.0	3.0	3.0	3.0	4.0	3.9	4.3	4.5	4.3	4.4	3.5	3.5	3.1	3.0	2.7	2.6	3.1	3.3	3.3	2.5	2.6	2.6	2.6	NA	NA	NA	2.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome	▄▃▄▂▁▁▄▄▅▅▅▅▅▆█	-149.0	-157.0	-151.0	-170.0	-175.0	-175.0	-153.0	-152.0	-143.0	-144.4	-146.4	-148.0	-147.3	-134.9	-122.1	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedTranslationAdjustment	▄▃▄▂▁▁▄▄▅▅▅▆▆█▇▇▆▇▆▇▇▆▅▆▇▇█	-68.0	-75.0	-68.0	-84.0	-88.0	-90.0	-67.0	-64.0	-54.0	-55.4	-57.0	-53.2	-51.2	-37.4	-39.7	-41.6	-52.0	-43.5	-46.3	-44.8	-44.9	-49.0	-55.1	-53.6	-41.6	-41.5	-33.7	NA	NA	NA	-19.2	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:TreasuryStockValue	▇▇████████▇▄▂▁▁▁▁▁▁▁▂▂▂▂▂▂▃▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄	390.0	393.0	397.0	399.0	400.0	402.0	406.0	408.0	410.0	411.6	377.6	264.4	206.2	173.2	177.5	178.2	179.2	180.4	189.0	189.6	191.4	204.9	210.6	212.8	213.0	219.6	225.0	225.7	225.7	226.5	232.2	232.2	232.3	232.9	252.9	256.7	261.2	262.3	274.4	279.8	279.8	279.9	279.9	NA	NA	NA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	█▁	4.0	1.0	NA	5.0	1.0	2.0	NA	2.0	2.0	2.0	NA	2.0	3.0	2.0	NA	NA	NA	NA	NA	NA	NA	NA	-4.4	2.1	1.8	2.3	2.4	2.5	2.3	2.1	2.1	2.2	2.2	1.9	1.7	1.9	1.8	2.7	-5.1	2.0	0.9	3.5	NA	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities	█▆▆▅▄▂▃▃▃▁▃▄▅▂▄▄▄▂▃▄▃▂▂▂▃▁▂▂▂▁▂▃▄▂▃▃▃▁▂▂▂▁▂▂▃▂	457.0	314.0	321.0	218.0	129.0	-9.0	101.0	59.0	54.0	-54.0	91.3	151.2	237.3	30.7	168.7	143.4	140.8	20.8	102.0	136.1	109.1	-4.9	30.5	1.2	41.5	-44.0	-22.6	27.5	15.2	-73.0	19.7	59.2	146.8	16.8	63.0	65.8	47.1	-64.4	-6.4	5.1	29.4	-68.4	2.8	9.4	67.7	-32.1
us-gaap:NetCashProvidedByUsedInInvestingActivities	▂▂▂▂▃▂▂▂▂▂▂▂▂▂▁▂▂▂█▁▂▂▂▂▂▂▂▂▂▂▂▄▂▂▃▂▂▃▂▃▂▃▃▂▄▂	-31.0	-32.0	-24.0	-13.0	12.0	-24.0	-47.0	-40.0	-45.0	-4.5	-65.5	-62.9	-67.2	-42.6	-89.3	-34.8	-48.5	-26.0	458.7	-120.9	-25.3	-26.2	-45.1	-32.3	-24.0	-14.5	-22.4	-0.7	-16.3	-24.1	-29.4	88.0	-71.1	-4.9	20.9	-0.5	-2.8	4.2	-11.2	13.3	1.7	3.9	4.0	-5.9	125.9	-3.7
us-gaap:NetCashProvidedByUsedInFinancingActivities	▁▄▄▅▂█▄▅▅▁▄▄▅▅▅▅▅▅▁▆▅▅▅▅▅▅▅▅▅▅▅▄▅▅▅▅▆▅▅▅▅	-484.0	-158.0	-188.0	-45.0	-368.0	329.0	-176.0	-60.0	-22.0	-459.0	-133.7	-101.9	-59.9	-21.5	-1.2	-1.7	-1.0	-5.5	-460.3	69.4	-14.2	-1.9	2.8	-0.9	-2.6	-3.7	-0.2	-1.1	-0.1	-2.5	-1.2	-109.6	-2.9	-12.7	-10.5	0.6	102.0	0.0	-0.5	5.4	-20.6	NA	-0.2	-60.3	-113.8	NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	▅▇▆▇▃█▄▅▅▁▅▅▆▅▆▆▆▅	-55.0	122.0	115.0	161.0	-229.0	293.0	-123.0	-44.0	-13.0	-517.0	-108.2	-14.2	105.1	-32.2	79.4	108.7	90.6	-9.9	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit	▇▇▆▅█▃▁█▃▂	3.0	4.0	1.0	0.0	5.0	-4.0	-8.0	5.0	-5.0	-6.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:DepreciationDepletionAndAmortization	▆▆▁▆▆▆▆▇▆█▃█▇█	29.0	29.0	22.0	28.0	28.0	28.0	28.0	30.0	29.0	30.9	24.2	30.7	30.1	31.0	NA	31.1	29.6	30.6	NA	29.6	28.5	27.9	-77.9	25.9	25.3	26.7	-77.4	26.9	24.9	25.6	-63.4	25.8	20.8	18.6	-55.5	18.8	17.9	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncreaseDecreaseInInventories	▄█▅▄▁▇▅▂▃▇▃▄▁█▆▅▁▆▅▄▃▆▃▅▁▇▅▃▁█▄▃▂█▄▄▃▇▅▃▂█▄▃▃▇	3.0	50.0	18.0	-4.0	-38.0	36.0	11.0	-31.0	-19.0	36.2	-9.8	-1.7	-40.6	54.0	27.2	8.5	-37.8	24.8	7.8	-4.8	-18.9	26.9	-8.9	8.5	-37.3	34.2	13.5	-15.6	-40.0	51.3	5.4	-15.8	-20.5	48.6	2.9	5.6	-9.8	45.8	9.1	-14.6	-29.2	49.8	1.8	-17.5	-19.4	43.6
us-gaap:NetCashProvidedByUsedInOperatingActivities	█▆▆▅▄▂▃▃▃▁▃▄▅▂▄▄▄▂▃▄▃▂▂▂▃▁▂▂▂▁▂▃▄▂▃▃▃▁▂▂▂▁▂▂▃▂	457.0	314.0	321.0	218.0	129.0	-9.0	101.0	59.0	54.0	-54.0	91.3	151.2	237.3	30.7	168.7	143.4	140.8	20.8	102.0	136.1	109.1	-4.9	30.5	1.2	41.5	-44.0	-22.6	27.5	15.2	-73.0	19.7	59.2	146.8	16.8	63.0	65.8	47.1	-64.4	-6.4	5.1	29.4	-68.4	2.8	9.4	67.7	-32.1
us-gaap:NetIncomeLoss	█▆▅▄▂▂▁▂▂▂▂▃▄▃▃▃▃▂▂▃▂▂▂▁▂▁▁▂▂▂▂▂▃▃▂▂▁▂▁▁▁▂▂▁▂▂	498.0	320.0	256.0	177.0	33.0	33.0	-51.0	2.0	17.0	26.7	17.0	124.0	162.7	90.9	130.6	109.8	94.5	55.0	42.2	65.6	31.7	10.3	-7.6	-26.5	-19.5	-34.5	-42.9	-20.4	2.1	-14.2	-20.4	38.1	94.1	65.3	46.1	31.3	-37.3	-11.3	-57.2	-65.6	-35.5	-23.0	-6.8	-32.0	22.3	-22.5
us-gaap:ProfitLoss	█▆▅▄▂▂▁▂▂▂▂▃▄▃	497.0	320.0	256.0	177.0	31.0	33.0	-52.0	1.0	16.0	26.3	16.6	124.0	163.0	91.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	-42.9	-21.2	0.6	-14.2	-20.4	38.1	94.3	65.1	46.1	31.3	-37.3	-11.3	-57.2	-65.6	-35.4	-22.9	-6.6	-31.7	22.4	-22.7

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities	▂▂▂▂▃▂▂▂▂▂▂▂▂▂▁▂▂▂█▁▂▂▂▂▂▂▂▂▂▂▂▄▂▂▃▂▂▃▂▃▂▃▃▂▄▂	-31.0	-32.0	-24.0	-13.0	12.0	-24.0	-47.0	-40.0	-45.0	-4.5	-65.5	-62.9	-67.2	-42.6	-89.3	-34.8	-48.5	-26.0	458.7	-120.9	-25.3	-26.2	-45.1	-32.3	-24.0	-14.5	-22.4	-0.7	-16.3	-24.1	-29.4	88.0	-71.1	-4.9	20.9	-0.5	-2.8	4.2	-11.2	13.3	1.7	3.9	4.0	-5.9	125.9	-3.7
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment	▄▄▃▂▂▃▆▅▅▅█▇▆▅█▅▃▄▆▄▃▄▆▄▃▂▃▂▃▃▄▃▂▂▂▂▁▁▂▁▁▁▁▁▁▁	32.0	34.0	24.0	14.0	15.0	24.0	45.0	37.0	38.0	43.1	63.8	62.8	44.4	43.2	67.9	35.0	19.6	26.1	46.1	27.6	24.8	26.3	46.7	33.6	18.6	14.9	25.3	12.6	18.2	24.0	32.3	17.7	12.4	13.2	15.1	9.3	4.2	2.6	8.0	5.4	5.6	2.4	3.0	6.1	3.5	1.9

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities	▁▄▄▅▂█▄▅▅▁▄▄▅▅▅▅▅▅▁▆▅▅▅▅▅▅▅▅▅▅▅▄▅▅▅▅▆▅▅▅▅	-484.0	-158.0	-188.0	-45.0	-368.0	329.0	-176.0	-60.0	-22.0	-459.0	-133.7	-101.9	-59.9	-21.5	-1.2	-1.7	-1.0	-5.5	-460.3	69.4	-14.2	-1.9	2.8	-0.9	-2.6	-3.7	-0.2	-1.1	-0.1	-2.5	-1.2	-109.6	-2.9	-12.7	-10.5	0.6	102.0	0.0	-0.5	5.4	-20.6	NA	-0.2	-60.3	-113.8	NA
us-gaap:ProceedsFromIssuanceOfLongTermDebt	▁█	0.0	350.0	NA	0.0	0.0	350.0	NA	NA	0.0	0.0	NA	NA	NA	NA	0.0	0.0	NA	NA	0.0	350.0	NA	NA	0.0	0.0	NA	NA	NA	NA	NA	NA	0.0	0.0	0.0	NA	0.2	0.0	350.0	NA	0.0	10.0	0.0	NA	0.0	0.0	NA	NA
us-gaap:RepaymentsOfLongTermDebt	▁█▁▁█	0.0	359.0	0.0	0.0	350.0	NA	2.0	0.0	3.0	NA	2.3	22.1	0.2	0.1	0.1	1.2	0.1	1.2	459.8	274.8	6.8	1.1	0.1	0.8	0.0	1.4	0.1	1.1	0.0	1.1	0.1	109.5	2.6	1.0	10.8	0.2	-242.1	0.0	0.0	0.1	0.1	NA	-0.4	60.3	113.8	NA
us-gaap:PaymentsOfDividends	▁█	16.0	17.0	NA	16.0	17.0	16.0	NA	16.0	17.0	16.9	18.3	18.5	18.7	18.9	0.0	0.0	0.0	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:PaymentsForRepurchaseOfCommonStock	█▃▄▁▁▁▃▂▁█▃▂▂▁▁▁▁	465.0	122.0	171.0	29.0	0.0	0.0	158.0	42.0	0.0	438.2	113.1	59.8	38.9	0.0	0.0	0.0	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType lpx:SeniorUnsecuredNotesMaturing2029,us-gaap:SeniorNotes		NA	3.625e-06	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

Common Stock Value

us-gaap:CommonStockValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	114	121	124	129	130	130	130	135	141	141	153	153	153	153	153	153	153	153	153	153	153	153	153	153	152	152	152	152	152	152	152	152	150	150	150	150	149	149	149	149	145	144	144
Percentage of CommonStockValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.8	5.2	5.9	6.5	7.2	6.1	7.1	6.6	6.7	6.8	6.1	5.9	5.9	6.1	6.3	6.6	7.1	7.4	7.6	6.3	6.7	6.9	7.0	6.9	6.8	6.6	6.5	6.3	6.2	6.1	6.1	6.1	5.9	6.1	6.5	6.5	6.6	7.0	7.0	6.8	6.2	6.1	6.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	113	121	123	129	129	129	129	153	153	153	152	152	152	150	149
Percentage of CommonStockSharesIssued	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	96	104	106	112	112	112	111	0.0	144	143
Percentage of CommonStockSharesOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31	2008-12-31
Value	114	121	124	129	130	130	130	135	141	141	153	153	153	153	153	153	153	153	152	152	152	152	152	152	152	152	150	150	150	150	149	149	149	149	145	144	144	139	116
Percentage of CommonStockSharesOutstanding	117.6	116.1	116.7	115.0	115.9	115.9	116.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	105.9	107.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:TreasuryStock

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31	2008-12-31
Value	17	18	16	8.4	9.0	10.0	10	-10.1	10	10	-10.6	-10.6	-10.7	10	-10.9	-10.9	-11.0	11	-12.1	-12.3	12	12	12	12	12	12	13	13
Percentage of CommonStockSharesOutstanding	16.0	16.1	0.0	5.8	6.3	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2016-06-30	2016-03-31	2015-09-30	2015-06-30	2015-03-31	2014-09-30	2014-06-30	2014-03-31	2013-09-30	2013-06-30	2013-03-31	2012-09-30	2012-06-30	2012-03-31	2011-09-30	2011-06-30	2011-03-31	2010-09-30	2010-06-30
Value	102	107	113	113	113	122	124	131	143	146	146	146	146	145	145	145	145	142	142	142	140	144	140	144	144	144	142	137	136	134	131	131	131	139
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2016-06-30	2016-03-31	2015-09-30	2015-06-30	2015-03-31	2014-09-30	2014-06-30	2014-03-31	2013-09-30	2013-06-30	2013-03-31	2012-09-30	2012-06-30	2012-03-31	2011-09-30	2011-06-30	2011-03-31	2010-09-30	2010-06-30
Value	101	106	112	112	112	121	123	130	142	144	144	144	144	144	143	143	142	142	142	142	140	140	140	140	139	138	137	137	136	134	131	131	131	128
Percentage of WeightedAverageNumberOfSharesOutstandingBasic	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	4.93	3.02	2.32	1.58	0.29	0.29	-0.41	0.02	0.14	0.2	0.14	0.87	1.13	0.63	0.91	0.76	0.65	0.38	0.29	0.46	0.22	0.07	-0.05	-0.19	-0.14	-0.24	-0.3	-0.14	0.01	-0.1	-0.15	0.27	0.68	0.47	0.33	0.23	-0.27	-0.08	-0.42	-0.49	-0.27	-0.18	-0.05	-0.24	0.17	-0.18
Percentage of EarningsPerShareBasic	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	4.9	3.0	2.31	1.57	0.29	0.29	-0.4	0.02	0.14	0.2	0.14	0.86	1.11	0.62	0.89	0.75	0.65	0.38	0.29	0.45	0.22	0.07	-0.05	-0.19	-0.14	-0.24	-0.3	-0.14	0.01	-0.1	-0.15	0.26	0.65	0.45	0.32	0.22	-0.27	-0.08	-0.42	-0.49	-0.27	-0.18	-0.05	-0.24	0.16	-0.18
Percentage of EarningsPerShareDiluted	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	506	314	275	182	33	11	-53.0	-7.0	19	28	18	123	150	94	137	121	86	59	39	66	36	16	-7.4	-36.3	-18.6	-40.6	-78.1	-28.5	3.7	-14.6	0.2	39	87	68	40	34	-41.9	-5.9	-84.2	-88.0	-29.3	-21.7	-24.5	-21.4	19	-17.9
Percentage of ComprehensiveIncomeNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	38.2	30.9	0.0	22.9	6.0	1.9	0.0	-1.2	3.2	4.9	0.0	16.7	18.5	13.7	0.0	16.9	12.5	9.7	0.0	11.1	6.3	3.3	0.0	-7.8	-3.8	-8.6	-17.2	-5.5	0.7	-3.3	0.0	7.7	15.3	12.8	8.7	7.5	-9.8	-1.6	-27.0	-25.1	-8.1	-6.5	0.0	-6.6	4.4	-6.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

Period End	2021-03-31	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-1000000.0	-2000000.0	0	-1000000.0	-2000000.0	0	0	0	0	0	0	0	100000.0	100000.0	200000.0	300000.0	100000.0	-200000.0
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	100.0	100.0	0.0	100.0	100.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-0.1	-0.4	0.0	-0.2	-0.3	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.1	0.0	-0.1

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	505	313	275	182	31	11	-54.0	-9.0	17	28	19	123	150	94
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	38.1	30.8	0.0	22.9	5.7	1.9	0.0	-1.5	2.9	4.9	0.0	16.7	18.5	13.7

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	619	538	509	503	431	477	467	529	510	500	495	524	550	514	461	479	485	455	422	442	443	415	395	416	443	427	430	477	461	388	415	416	422	392	360	369	359	313	290	322	336	295	284	289	346	268
Percentage of CostOfGoodsAndServicesSold	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	46.7	52.9	0.0	63.3	78.6	81.5	0.0	87.7	86.7	86.1	0.0	71.1	67.9	74.4	0.0	66.7	70.0	74.5	0.0	74.2	76.1	82.3	0.0	89.5	89.9	90.7	95.0	92.1	89.0	87.3	86.6	82.0	73.8	73.0	78.6	78.9	84.1	86.7	93.2	91.8	92.8	88.9	0.0	89.6	77.4	90.2

Disposal Group Not Discontinued Operation Gain Loss On Disposal

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal

Period End	2020-09-30
Value	2000000.0
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.3

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

Period End	2021-06-30	2021-03-31	2017-12-31	2017-09-30	2016-12-31	2016-09-30	2015-12-31	2015-09-30	2014-12-31	2014-09-30	2013-12-31	2013-09-30	2013-06-30	2012-12-31	2012-09-30	2012-06-30	2011-12-31	2011-09-30	2011-06-30
Value	0.0	11	0.0	0.0	-4.1	-13.2	0.0	0.0	0.0	0.0	-1.5	-0.8	0.0	0.0	0.0	-52.2	0.0	0.0	0.0
Percentage of GainsLossesOnExtinguishmentOfDebt	0.0	100.0	0.0	0.0	100.0	100.0	0.0	0.0	0.0	0.0	100.0	100.0	0.0	0.0	0.0	100.0	0.0	0.0	0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0	1.1	0.0	0.0	0.0	-2.2	0.0	0.0	0.0	0.0	-0.3	-0.2	0.0	0.0	0.0	-12.2	0.0	0.0	0.0

Gross Profit

us-gaap:GrossProfit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	707	479	350	292	117	108	70	75	78	80	93	212	260	176	214	210	182	128
Percentage of GrossProfit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	53.4	47.1	0.0	36.7	21.4	18.5	0.0	12.4	13.3	13.9	0.0	28.9	32.1	25.6	0.0	29.3	26.3	21.0

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2015-09-30	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	46	273	97	83	-51.0	2.0	17	26	17	124	162	94	130	110	94	55	65	-24.6	-43.0	-18.3	2.1	-14.2	-19.1	37	94	65	49	31	-37.2	-11.2	-56.8	-59.3	-33.0	-23.0	-2.6	-31.2	23
Percentage of IncomeLossFromContinuingOperations	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0	34.3	17.7	14.2	0.0	0.3	2.9	4.6	0.0	16.8	20.1	13.7	0.0	15.4	13.6	9.0	11.0	-5.3	-9.5	-3.5	0.4	-3.2	-4.0	7.4	16.5	12.2	10.7	6.7	-8.7	-3.1	-18.2	-16.9	-9.1	-6.9	0.0	-9.7	5.3

us-gaap:IncomeLossFromContinuingOperations us-gaap:StatementBusinessSegments

lpx:EWP

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	9.0	3.0	9.0	6.0	10.0	7.0
Percentage of IncomeLossFromContinuingOperations	3.3	3.1	10.8	300.0	58.8	26.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.1	0.5	1.5	1.0	1.7	1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0

lpx:Osb

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	189	46	35	-1.0	-3.0	8.0
Percentage of IncomeLossFromContinuingOperations	69.2	47.4	42.2	-50.0	-17.6	29.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	23.8	8.4	6.0	-0.2	-0.5	1.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Osb	0.0	0.0	0.0	0.0	0.0	0.0

lpx:Siding

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	76	51	42	44	45	39
Percentage of IncomeLossFromContinuingOperations	27.8	52.6	50.6	2200.0	264.7	145.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	9.6	9.3	7.2	7.3	7.7	6.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Siding	0.0	0.0	0.0	0.0	0.0	0.0

srt:SouthAmerica

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	11	11	7.0	7.0	9.0	10.0
Percentage of IncomeLossFromContinuingOperations	4.0	11.3	8.4	350.0	52.9	37.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.4	2.0	1.2	1.2	1.5	1.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:SouthAmerica	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AllOtherSegments

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	-5.0	-5.0	-3.0	-1.0	-1.0	1.0
Percentage of IncomeLossFromContinuingOperations	-1.8	-5.2	-3.6	-50.0	-5.9	3.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-0.6	-0.9	-0.5	-0.2	-0.2	0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AllOtherSegments	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Corporate

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	-7.0	-9.0	-7.0	-6.0	-7.0	-7.0
Percentage of IncomeLossFromContinuingOperations	-2.6	-9.3	-8.4	-300.0	-41.2	-26.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-0.9	-1.6	-1.2	-1.0	-1.2	-1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Corporate	0.0	0.0	0.0	0.0	0.0	0.0

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	644	416	292	237	50	42	-79.0	3.0	19	33	17	167	214	124	155	156	128	69	48	56	46	13	-5.0	-29.0	-19.9	-41.5	-55.5	-23.3	-5.8	-20.4	-30.3	41	114	81	56	37	-45.5	-10.6	-49.6	-74.2	-33.9	-26.4	-7.6	-43.6	35	-32.1
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	48.6	40.9	0.0	29.8	9.1	7.2	0.0	0.5	3.2	5.8	0.0	22.7	26.5	18.0	0.0	21.8	18.6	11.4	0.0	9.5	8.0	2.6	0.0	-6.2	-4.0	-8.8	-12.2	-4.5	-1.1	-4.6	-6.3	8.3	20.0	15.1	12.4	8.0	-10.6	-2.9	-15.9	-21.2	-9.4	-8.0	0.0	-13.5	7.9	-10.8

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-147.0	-96.0	213	-60.0	-19.0	-9.0	-26.0	3.0	3.0	7.2	-0.7	41	51	29	21	46	36	15	6.7	-7.5	16	4.4	5.0	-2.4	1.0	-6.3	-11.3	-3.6	-6.7	-5.6	-10.5	4.4	24	23	12	7.9	-11.1	-1.2	-3.0	-20.9	-8.4	-6.8	-8.1	-16.4	12	-10.3
Percentage of IncomeTaxExpenseBenefit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-11.1	-9.4	0.0	-7.5	-3.5	-1.5	0.0	0.5	0.5	1.2	0.0	5.7	6.3	4.3	0.0	6.5	5.2	2.5	0.0	-1.3	2.8	0.9	0.0	-0.5	0.2	-1.3	-2.5	-0.7	-1.3	-1.3	-2.2	0.9	4.3	4.3	2.6	1.7	-2.6	-0.3	-1.0	-6.0	-2.3	-2.1	0.0	-5.1	2.8	-3.5

Income Taxes Paid

us-gaap:IncomeTaxesPaid

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	45	0.0	0.0	-9.0	0.0	7.0	21	16	32	37	3.0
Percentage of IncomeTaxesPaid	100.0	0.0	0.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	5.7	0.0	0.0	0.0	0.0	1.2	3.6	0.0	4.3	4.6	0.4

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

Period End	2021-06-30	2021-03-31
Value	200	21
Percentage of IncomeTaxesPaidNet	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	15.1	2.1

Interest Expense

us-gaap:InterestExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	4.0	5.0	0.0	5.0	6.0	6.0	4.0	5.0	5.0	3.8	3.1	3.9	4.4	4.4	4.5	4.9	4.9	5.0	5.8	9.0	9.3	8.0	8.1	8.4	7.2	7.5	6.4	8.3	7.4	7.7	8.0	7.6	9.8	10	12	10	13	12	14	14	14	14	14	15	17	16
Percentage of InterestExpense	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.3	0.5	0.0	0.6	1.1	1.0	0.0	0.8	0.9	0.7	0.0	0.5	0.5	0.6	0.0	0.7	0.7	0.8	0.0	1.5	1.6	1.6	0.0	1.8	1.5	1.6	1.4	1.6	1.4	1.7	1.7	1.5	1.7	2.0	2.8	2.3	3.1	3.5	4.6	4.1	4.0	4.2	0.0	4.7	4.0	5.7

Interest Paid Net

us-gaap:InterestPaidNet

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	0.0	9.0	2.0	10.0
Percentage of InterestPaidNet	0.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0	0.9	0.4	1.7

Net Income Loss

us-gaap:NetIncomeLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	498	320	256	177	33	33	-51.0	2.0	17	26	17	124	162	90	130	109	94	55	42	65	31	10	-7.6	-26.5	-19.5	-34.5	-42.9	-20.4	2.1	-14.2	-20.4	38	94	65	46	31	-37.3	-11.3	-57.2	-65.6	-35.5	-23.0	-6.8	-32.0	22	-22.5
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	37.6	31.5	0.0	22.3	6.0	5.6	0.0	0.3	2.9	4.6	0.0	16.8	20.1	13.1	0.0	15.3	13.6	9.0	0.0	11.0	5.4	2.0	0.0	-5.7	-4.0	-7.3	-9.5	-3.9	0.4	-3.2	-4.3	7.5	16.4	12.1	10.1	6.7	-8.7	-3.1	-18.3	-18.7	-9.8	-6.9	0.0	-9.9	5.0	-7.6

us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments

us-gaap:AllOtherSegments

Period End	2021-06-30	2020-06-30
Value	498	33
Percentage of NetIncomeLoss	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	37.6	6.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AllOtherSegments	0.0	0.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2015-03-31	2014-12-31	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31
Value	498	320	177	33	33	2.0	17	26	124	163	90	-34.5	-42.9	-14.2	-20.4	38	94	65	46	31	-37.3	-11.3	-57.2	-65.6	-35.5	-23.0
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.2	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	37.6	31.5	22.3	6.0	5.6	0.3	2.9	4.6	16.8	20.1	13.1	-7.3	-9.5	-3.2	-4.3	7.5	16.4	12.1	10.1	6.7	-8.7	-3.1	-18.3	-18.7	-9.8	-6.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	0.0	-1.0	5.0	-6.0	-5.0	-4.0	11	1.4	-0.6	-0.3	-2.6	-3.2	-2.6	-4.1	-3.3	-7.4	-20.2	-5.8	-5.7	-6.4	-11.6	-5.8	-8.3	-1.3	-8.7	-1.9	-10.2	-2.3	-5.7	25	-7.8	19	-6.2	-64.5	-8.5	0.6	-1.5	-10.3	-8.2	10	-27.7	-13.5	-9.4
Percentage of NonoperatingIncomeExpense	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0	-0.2	0.9	0.0	-0.8	-0.7	2.0	0.0	-0.1	-0.0	-0.4	0.0	-0.4	-0.6	-0.5	0.0	-3.4	-1.0	-1.1	0.0	-2.5	-1.2	-1.8	-0.3	-1.7	-0.4	-2.3	-0.5	-1.1	4.5	-1.5	4.3	-1.3	-15.1	-2.4	0.2	-0.4	-2.8	-2.5	0.0	-8.6	-3.0	-3.2

Operating Income Loss

us-gaap:OperatingIncomeLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	653	431	297	242	53	44	-73.0	8.0	23	21	16	167	215	127	159	158	132	72	56	76	52	18	1.4	-17.4	-14.1	-33.2	-48.9	-14.6	-3.9	-10.2	-21.9	47	88	89	47	43	19	-2.1	-25.6	-72.7	-23.6	-18.2	-17.9	-15.9	48	-22.7
Percentage of OperatingIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	49.3	42.4	0.0	30.4	9.7	7.5	0.0	1.3	3.9	3.7	0.0	22.7	26.5	18.4	0.0	22.1	19.1	11.9	0.0	12.9	9.0	3.7	0.0	-3.7	-2.9	-7.0	-10.8	-2.8	-0.8	-2.3	-4.6	9.4	15.5	16.6	10.2	9.3	4.4	-0.6	-8.2	-20.7	-6.5	-5.5	0.0	-4.9	10.9	-7.6

us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments

lpx:EWP

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	0.0	2.0	0.0	2.0	6.0	2.5	-0.4	8.5	8.6	2.8	3.1	6.5	5.3	0.8
Percentage of OperatingIncomeLoss	0.0	3.8	0.0	25.0	26.1	11.5	-2.5	5.1	4.0	2.2	1.9	4.1	4.0	1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0	0.4	0.0	0.3	1.0	0.4	0.0	1.2	1.1	0.4	0.0	0.9	0.8	0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0	0.0	8.1	7.9	2.8	0.0	6.6	5.6	1.0

lpx:Siding

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	177	31	33	38	37	33	33	59	62	45	45	52	48	40	22	35	41	26	13	17	29	32	13	20	25	19	15	22	27	20	11	20	19	16	6.2	11	11	12	11	9.3	21
Percentage of OperatingIncomeLoss	73.1	58.5	75.0	475.0	160.9	152.5	207.4	35.7	29.2	35.6	28.5	33.2	36.5	55.3	39.6	45.8	80.1	142.3	992.9	-98.9	-207.1	-99.1	-28.4	-142.5	-664.1	-188.2	-70.8	47.3	30.5	23.2	23.4	46.7	102.1	-800.0	-24.2	-16.2	-47.9	-69.8	-65.4	-58.5	44.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	22.3	5.7	5.6	6.3	6.3	5.7	0.0	8.1	7.7	6.6	0.0	7.4	7.0	6.6	0.0	5.9	7.2	5.3	0.0	3.7	5.9	7.0	3.1	4.0	5.0	4.3	3.2	4.4	4.7	3.9	2.4	4.3	4.5	4.6	2.0	3.4	3.1	3.8	0.0	2.9	4.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Siding	0.0	0.0	0.0	0.0	0.0	0.0	0.0	24.8	24.0	20.0	0.0	23.3	21.0	18.8	0.0	18.1	20.2	14.8	0.0	10.9	17.8	19.0	9.9	12.7	15.3	13.4	11.2	15.1	17.7	15.5	9.4	15.1	14.2	14.9	6.7	10.5	9.5	12.0	0.0	8.9	16.7

us-gaap:AllOtherSegments

Period End	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	320	177	33	33	-4.0	-2.0	-3.5	-1.4	-1.2	-0.8	-0.9	-0.7	-1.6	-0.9	-0.2	-0.6	-0.4	-0.2	-0.4	-0.3	-0.6	-1.0	-0.9	0.8	-2.2	-1.3	-0.7	-0.3	-2.1	-2.0	-0.9	-1.2	-2.0	-1.9	-0.7	-6.6	-0.9	2.2	-0.7	-5.7	0.7	3.7
Percentage of OperatingIncomeLoss	74.2	73.1	62.3	75.0	-50.0	-8.7	-16.1	-8.6	-0.7	-0.4	-0.7	-0.4	-1.0	-0.7	-0.3	-1.1	-0.5	-0.4	-2.1	-21.4	3.4	7.1	2.7	-1.6	15.1	33.3	6.9	1.4	-4.4	-2.2	-1.0	-2.6	-4.6	-10.0	33.3	25.8	1.2	-9.3	3.8	31.8	-4.4	7.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	31.5	22.3	6.0	5.6	-0.7	-0.3	-0.6	0.0	-0.2	-0.1	-0.1	0.0	-0.2	-0.1	-0.0	0.0	-0.1	-0.0	-0.1	0.0	-0.1	-0.2	-0.2	0.2	-0.4	-0.3	-0.2	-0.1	-0.4	-0.3	-0.2	-0.3	-0.4	-0.4	-0.2	-2.1	-0.3	0.6	-0.2	0.0	0.2	0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AllOtherSegments	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	-15.8	-10.8	-11.4	0.0	-24.6	-12.7	-2.3	0.0	-5.3	-3.0	-6.6	0.0	-8.8	-13.5	-12.3	10.1	-62.9	-32.5	-18.9	-9.7	-53.8	-21.5	-9.9	-16.0	-22.0	-17.8	-7.0	-72.5	-2.0	4.4	-6.7	0.0	1.7	7.8

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31
Value	8.0	-6.0	0.0	-22.0	-9.0	2.0	2.0	1.6	-1.0	-12.0	3.9	-35.2	-8.1	1.6	-0.4	20	1.0	-6.5	3.6
Percentage of OtherComprehensiveIncomeLossNetOfTax	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.6	-0.6	0.0	-3.8	-1.5	0.3	0.3	0.0	-0.1	-1.5	0.6	-7.8	-1.6	0.3	-0.1	4.3	0.2	-1.1	0.7

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31
Value	8.0	-6.0	5.0	0.0	-22.0	-9.0	2.0	2.0	1.6	-1.0	-12.0	3.9	-35.2	-8.1	1.6	-0.4	20	1.0	-6.5	3.6
Percentage of OtherComprehensiveIncomeLossNetOfTax	100.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.6	-0.6	0.6	0.0	-3.8	-1.5	0.3	0.3	0.0	-0.1	-1.5	0.6	-7.8	-1.6	0.3	-0.1	4.3	0.2	-1.1	0.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	-6.0	-10.0	0.0	-1.0	5.0	-2.0	-1.0	-2.0	11	0.4	-2.2	-0.7	-1.4	-2.0	-0.6	-1.5	-0.3	-16.6	-0.5	1.4	0.5	0.2	-3.7	0.4	-2.2	-23.5	-18.5	-20.7	-27.3	-28.1	-22.1	-21.3	-22.6	-22.4	-18.1	-18.2	-20.1	-16.9	-15.2	-16.5	-17.8	-18.4	-17.0	-18.2
Percentage of OtherNonoperatingIncomeExpense	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-0.5	-1.0	0.0	-0.2	0.9	0.0	-0.2	-0.3	1.9	0.0	-0.3	-0.1	-0.2	0.0	-0.1	-0.2	-0.0	0.0	-0.1	0.2	0.1	0.0	-0.8	0.1	-0.5	-5.2	-3.6	-4.0	-6.1	-5.9	-4.4	-3.7	-4.2	-4.9	-3.9	-4.3	-5.6	-5.4	-4.3	-4.6	-5.4	0.0	-5.3	-4.1

Profit Loss

us-gaap:ProfitLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	497	320	256	177	31	33	-52.0	1.0	16	26	16	124	163	91	-42.9	-21.2	0.6	-14.2	-20.4	38	94	65	46	31	-37.3	-11.3	-57.2	-65.6	-35.4	-22.9	-6.6	-31.7	22	-22.7
Percentage of ProfitLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	37.5	31.5	0.0	22.3	5.7	5.6	0.0	0.2	2.7	4.5	0.0	16.8	20.1	13.2	-9.5	-4.1	0.1	-3.2	-4.3	7.5	16.5	12.1	10.1	6.7	-8.7	-3.1	-18.3	-18.7	-9.8	-6.9	0.0	-9.8	5.0	-7.6

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	1325	1017	860	795	548	585	537	603	588	581	589	736	810	691	710	718	694	610	550	596	582	504	462	464	493	471	453	518	518	444	479	507	572	537	458	467	427	361	312	350	362	331	316	322	447	297
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Revenues

us-gaap:Revenues

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	1325	1017	860	795	548	585	537	603	588	581	589	737	811	691	710	718	694	610	550	596	582	504	462	464	493	471	453	518	518	444	479	507	572	537	458	467	427	361	312	350	362	331	316	322	447	297
Percentage of Revenues	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:Revenues lpx:Producttype

lpx:CommodityProducts

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	445	294	111	119
Percentage of Revenues	33.6	28.9	20.3	20.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	33.6	28.9	20.3	20.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:CommodityProducts	0.0	0.0	0.0	0.0

lpx:Valueadd

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	843	687	558	425	445	478	465	443	502	538	470
Percentage of Revenues	63.6	67.6	70.2	77.6	76.1	79.3	79.1	76.2	68.1	66.3	68.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	63.6	67.6	70.2	77.6	76.1	79.3	79.1	76.2	68.1	66.4	68.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.1	99.9	99.9

us-gaap:Commodity

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	205	111	119	107	107	118	148	219	257	201	236	239	221	169
Percentage of Revenues	25.8	20.3	20.3	17.7	18.2	20.3	25.3	29.7	31.7	29.1	33.2	33.4	31.9	27.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	25.8	20.3	20.3	17.7	18.2	20.3	25.3	29.7	31.7	29.1	33.2	33.4	31.9	27.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Commodity	0.0	0.0	0.0	0.0	0.0	0.0	100.1	100.2	100.0	100.4	100.0	100.0	100.0	100.0

us-gaap:Revenues lpx:Producttype, us-gaap:ProductOrService

lpx:CommodityProducts, lpx:OSBcommodity

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	425	281	108	113
Percentage of Revenues	32.1	27.6	19.7	19.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	32.1	27.6	19.7	19.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:CommodityProducts lpx:OSBcommodity	0.0	0.0	0.0	0.0

lpx:CommodityProducts, lpx:Plywood

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	19	13	3.0	6.0
Percentage of Revenues	1.4	1.3	0.5	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.4	1.3	0.5	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:CommodityProducts lpx:Plywood	0.0	0.0	0.0	0.0

lpx:OtherProductTypes, lpx:Otherproducts

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	38	36	23	21
Percentage of Revenues	2.9	3.5	4.2	3.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	2.9	3.5	4.2	3.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OtherProductTypes lpx:Otherproducts	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:IJoist

Period End	2021-06-30
Value	75
Percentage of Revenues	5.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	5.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:IJoist	0.0

lpx:Valueadd, lpx:LSL

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	11	8.0	9.0	12
Percentage of Revenues	0.8	0.8	1.6	2.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.8	0.8	1.6	2.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:LSL	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:LVL

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	45	43	30	36
Percentage of Revenues	3.4	4.2	5.5	6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	3.4	4.2	5.5	6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:LVL	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:OSBvalueadd

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	414	295	128	136
Percentage of Revenues	31.2	29.0	23.4	23.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	31.2	29.0	23.4	23.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:OSBvalueadd	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:SmartSideStrandsiding

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	298	293	212	194
Percentage of Revenues	22.5	28.8	38.7	33.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	22.5	28.8	38.7	33.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:SmartSideStrandsiding	0.0	0.0	0.0	0.0

us-gaap:Revenues lpx:Producttype, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

lpx:CommodityProducts, lpx:OSBcommodity, lpx:Osb

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	425	282	108	113
Percentage of Revenues	32.1	27.7	19.7	19.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	32.1	27.7	19.7	19.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:CommodityProducts lpx:OSBcommodity lpx:Osb	0.0	0.0	0.0	0.0

lpx:CommodityProducts, lpx:Plywood, lpx:EWP

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	19	13	3.0	6.0
Percentage of Revenues	1.4	1.3	0.5	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.4	1.3	0.5	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:CommodityProducts lpx:Plywood lpx:EWP	0.0	0.0	0.0	0.0

lpx:OtherProductTypes, lpx:Otherproducts, lpx:EWP

Period End	2021-06-30	2021-03-31	2020-03-31
Value	7.0	11	7.0
Percentage of Revenues	0.5	1.1	1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.5	1.1	1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OtherProductTypes lpx:Otherproducts lpx:EWP	0.0	0.0	0.0

lpx:OtherProductTypes, lpx:Otherproducts, lpx:LPSouthAmerica

Period End	2021-06-30	2021-03-31	2020-03-31
Value	0.0	3.0	1.0
Percentage of Revenues	0.0	0.3	0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0	0.3	0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OtherProductTypes lpx:Otherproducts lpx:LPSouthAmerica	0.0	0.0	0.0

lpx:OtherProductTypes, lpx:Otherproducts, lpx:Osb

Period End	2021-06-30	2021-03-31	2020-03-31
Value	2.0	3.0	4.0
Percentage of Revenues	0.2	0.3	0.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.2	0.3	0.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OtherProductTypes lpx:Otherproducts lpx:Osb	0.0	0.0	0.0

lpx:OtherProductTypes, lpx:Otherproducts, lpx:Siding

Period End	2021-06-30	2021-03-31	2020-03-31
Value	3.0	1.0	2.0
Percentage of Revenues	0.2	0.1	0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.2	0.1	0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OtherProductTypes lpx:Otherproducts lpx:Siding	0.0	0.0	0.0

lpx:OtherProductTypes, lpx:Otherproducts, us-gaap:AllOtherSegments

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	26	18	4.0	7.0
Percentage of Revenues	2.0	1.8	0.7	1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	2.0	1.8	0.7	1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OtherProductTypes lpx:Otherproducts us-gaap:AllOtherSegments	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:IJoist, lpx:EWP

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	75	48	32	37
Percentage of Revenues	5.7	4.7	5.8	6.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	5.7	4.7	5.8	6.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:IJoist lpx:EWP	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:LSL, lpx:EWP

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	11	8.0	9.0	12
Percentage of Revenues	0.8	0.8	1.6	2.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.8	0.8	1.6	2.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:LSL lpx:EWP	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:LVL, lpx:EWP

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	45	43	30	36
Percentage of Revenues	3.4	4.2	5.5	6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	3.4	4.2	5.5	6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:LVL lpx:EWP	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:OSBvalueadd, lpx:LPSouthAmerica

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	63	41	32	32
Percentage of Revenues	4.8	4.0	5.8	5.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	4.8	4.0	5.8	5.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:OSBvalueadd lpx:LPSouthAmerica	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:OSBvalueadd, lpx:Osb

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	350	254	95	103
Percentage of Revenues	26.4	25.0	17.3	17.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	26.4	25.0	17.3	17.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:OSBvalueadd lpx:Osb	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:SmartSideStrandsiding, lpx:LPSouthAmerica

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	10.0	9.0	5.0	3.0
Percentage of Revenues	0.8	0.9	0.9	0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.8	0.9	0.9	0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:SmartSideStrandsiding lpx:LPSouthAmerica	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:SmartSideStrandsiding, lpx:Siding

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	288	283	207	191
Percentage of Revenues	21.7	27.8	37.8	32.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	21.7	27.8	37.8	32.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:SmartSideStrandsiding lpx:Siding	0.0	0.0	0.0	0.0

us-gaap:Revenues lpx:Producttype, us-gaap:StatementBusinessSegments

lpx:CommodityProducts, lpx:EWP

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	19	13	3.0	6.0
Percentage of Revenues	1.4	1.3	0.5	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.4	1.3	0.5	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:CommodityProducts lpx:EWP	0.0	0.0	0.0	0.0

lpx:CommodityProducts, lpx:Osb

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	425	282	108	113
Percentage of Revenues	32.1	27.7	19.7	19.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	32.1	27.7	19.7	19.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:CommodityProducts lpx:Osb	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:EWP

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	132	100	86	72	86	90	95	72	65	91	93	86	80	85	83	72
Percentage of Revenues	10.0	9.8	10.8	13.1	14.7	14.9	16.2	12.4	11.1	12.3	11.5	12.5	11.3	11.9	12.0	11.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	10.0	9.8	10.8	13.1	14.7	14.9	16.2	12.4	11.1	12.4	11.5	12.5	11.3	11.9	12.0	11.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	99.4	99.6	99.9	100.0	100.0	100.0	100.0	100.0

lpx:Valueadd, lpx:LPSouthAmerica

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	74	50	37	35
Percentage of Revenues	5.6	4.9	6.8	6.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	5.6	4.9	6.8	6.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:LPSouthAmerica	0.0	0.0	0.0	0.0

lpx:Valueadd, lpx:Osb

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	350	254	162	95	103	96	100	98	115	151	155	129	140	139	132	113
Percentage of Revenues	26.4	25.0	20.4	17.3	17.6	15.9	17.0	16.9	19.7	20.5	19.1	18.7	19.8	19.4	19.0	18.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	26.4	25.0	20.4	17.3	17.6	15.9	17.0	16.9	19.7	20.5	19.1	18.7	19.8	19.4	19.0	18.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:Osb	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.3	100.1	100.1	100.0	100.0	100.0	100.0	100.0

lpx:Valueadd, lpx:Siding

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	288	284	266	218	210	256	231	229	205	226	246	214	197	203	207	199
Percentage of Revenues	21.7	27.9	33.5	39.8	35.9	42.5	39.3	39.5	34.8	30.7	30.3	31.0	27.7	28.3	29.9	32.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	21.7	27.9	33.5	39.8	35.9	42.5	39.3	39.5	34.8	30.7	30.3	31.0	27.7	28.3	29.9	32.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd lpx:Siding	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.0	100.2	99.9	100.0	100.0	100.0	100.0	100.0

lpx:Valueadd, srt:SouthAmerica

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	44	37	35	36	39	44	34	44	41
Percentage of Revenues	5.5	6.8	6.0	6.0	6.6	7.6	4.6	5.4	6.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	5.5	6.8	6.0	6.0	6.6	7.6	4.6	5.4	6.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Valueadd srt:SouthAmerica	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Commodity, lpx:EWP

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	7.0	3.0	6.0	7.0	7.0	8.4	6.6	9.0	13	10	8.8	10.0	9.8	5.9
Percentage of Revenues	0.9	0.5	1.0	1.2	1.2	1.4	1.1	1.2	1.6	1.5	1.2	1.4	1.4	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.9	0.5	1.0	1.2	1.2	1.4	1.1	1.2	1.6	1.5	1.2	1.4	1.4	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Commodity lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0	104.8	103.4	98.5	100.0	100.0	100.0	100.0	100.0

us-gaap:Commodity, lpx:Osb

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	198	108	113	100	97	106	137	197	231	181	214	209	190	151
Percentage of Revenues	24.9	19.7	19.3	16.6	16.5	18.4	23.3	26.7	28.5	26.2	30.1	29.2	27.5	24.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	24.9	19.7	19.3	16.6	16.5	18.4	23.3	26.7	28.5	26.2	30.1	29.2	27.5	24.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Commodity lpx:Osb	0.0	0.0	0.0	0.0	0.0	0.0	99.6	100.3	99.8	100.0	100.0	100.0	100.0	100.0

us-gaap:Revenues us-gaap:ProductOrService

lpx:CanExelsiding

Period End	2020-12-31	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	0.0	3.0	11	8.0	15	7.0	17	4.0	7.0	13	14	7.4	13	14	14
Percentage of Revenues	0.0	0.5	1.9	1.5	2.5	1.2	2.9	0.7	0.9	1.6	2.0	1.0	1.8	2.0	2.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0	0.5	1.9	1.5	2.5	1.2	2.9	0.7	1.0	1.6	2.0	1.0	1.8	2.0	2.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:CanExelsiding	0.0	0.0	0.0	0.0	0.0	0.0	0.0	102.6	100.0	104.0	100.7	94.9	100.0	100.0	100.0

lpx:IJoist

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	42	37	32	37	34	39	38	26	24	34	32	32
Percentage of Revenues	4.9	4.7	5.8	6.3	6.3	6.5	6.5	4.5	4.1	4.6	3.9	4.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	4.9	4.7	5.8	6.3	6.3	6.5	6.5	4.5	4.1	4.6	3.9	4.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:IJoist	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	98.4	99.7	101.6	99.7

lpx:LSL

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	10.0	14	9.0	12	11	12	14	12	10.0	18	17	13
Percentage of Revenues	1.2	1.8	1.6	2.1	2.0	2.0	2.4	2.1	1.7	2.4	2.1	1.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.2	1.8	1.6	2.1	2.0	2.0	2.4	2.1	1.7	2.4	2.1	1.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:LSL	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	96.2	99.4	97.7	97.7

lpx:LVL

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	40	35	30	36	33	37	40	31	28	36	40	37	36	37	37	33
Percentage of Revenues	4.7	4.4	5.5	6.2	6.1	6.1	6.8	5.3	4.8	4.9	4.9	5.4	5.1	5.2	5.4	5.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	4.7	4.4	5.5	6.2	6.1	6.1	6.8	5.3	4.8	4.9	4.9	5.4	5.1	5.2	5.4	5.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:LVL	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	99.3	100.8	99.0	101.1	99.2	100.0	100.0	100.0

lpx:OSBcommodity

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	212	198	108	113	82	100	101	111	143	211	249	193	230	231	215	164
Percentage of Revenues	24.7	24.9	19.7	19.3	15.3	16.6	17.2	19.1	24.3	28.6	30.7	27.9	32.4	32.2	31.1	27.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	24.7	24.9	19.7	19.3	15.3	16.6	17.2	19.1	24.3	28.6	30.7	27.9	32.4	32.2	31.1	27.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OSBcommodity	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	99.8	100.1	100.0	100.2	100.1	100.0	100.0	100.0

lpx:OSBvalueadd

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	260	202	128	136	122	130	138	138	152	185	208	177
Percentage of Revenues	30.2	25.4	23.4	23.2	22.7	21.6	23.5	23.7	25.8	25.1	25.6	25.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	30.2	25.4	23.4	23.2	22.7	21.6	23.5	23.7	25.8	25.1	25.7	25.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OSBvalueadd	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.5	99.9	99.9	99.8

lpx:Otherproducts

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	23	32	12	21	17	19	16	20	17	17	15	20
Percentage of Revenues	2.7	4.0	2.2	3.6	3.2	3.2	2.7	3.5	2.9	2.3	1.8	2.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	2.7	4.0	2.2	3.6	3.2	3.2	2.7	3.5	2.9	2.3	1.9	2.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Otherproducts	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	98.8	101.8	97.4	99.5

lpx:Plywood

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	9.0	7.0	3.0	6.0	6.0	7.0	6.0	7.0	6.0	8.0	8.0	8.0	6.2	8.2	5.8	4.8
Percentage of Revenues	1.0	0.9	0.5	1.0	1.1	1.2	1.0	1.2	1.0	1.1	1.0	1.2	0.9	1.1	0.8	0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.0	0.9	0.5	1.0	1.1	1.2	1.0	1.2	1.0	1.1	1.0	1.2	0.9	1.1	0.8	0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Plywood	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	111.1	103.9	100.0	105.3	98.4	100.0	100.0	100.0

lpx:SmartSideFibersiding

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	0.0	6.0	11	19	22	28	25	26	22	30	28	26
Percentage of Revenues	0.0	0.8	2.0	3.2	4.1	4.6	4.3	4.5	3.7	4.1	3.5	3.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0	0.8	2.0	3.2	4.1	4.6	4.3	4.5	3.7	4.1	3.5	3.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:SmartSideFibersiding	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	99.1	98.7	100.4	100.4

lpx:SmartSideStrandsiding

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	265	264	212	194	202	217	204	193	183	191	200	172
Percentage of Revenues	30.8	33.2	38.7	33.2	37.6	36.0	34.7	33.2	31.1	25.9	24.7	24.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	30.8	33.2	38.7	33.2	37.6	36.0	34.7	33.2	31.1	25.9	24.7	24.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:SmartSideStrandsiding	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.1	99.9	99.8	100.1

us-gaap:Revenues us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

lpx:IJoist, lpx:EWP

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	37	32	37	34	39	38	26	24	34	32	32	28	32	30	25
Percentage of Revenues	4.7	5.8	6.3	6.3	6.5	6.5	4.5	4.1	4.6	3.9	4.6	4.1	4.5	4.4	4.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	4.7	5.8	6.3	6.3	6.5	6.5	4.5	4.1	4.6	3.9	4.6	4.1	4.5	4.4	4.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:IJoist lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0	0.0	98.4	99.7	101.6	100.0	100.3	100.0	100.0	100.0

lpx:LSL, lpx:EWP

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	14	9.0	12	10.0	12	14	13	10.0	18	17	13	11	12	12	10
Percentage of Revenues	1.8	1.6	2.1	1.9	2.0	2.4	2.3	1.7	2.4	2.1	1.9	1.7	1.7	1.7	1.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.8	1.6	2.1	1.9	2.0	2.4	2.3	1.7	2.4	2.1	1.9	1.7	1.7	1.7	1.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:LSL lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0	0.0	96.2	99.4	97.7	100.0	101.7	100.0	100.0	100.0

lpx:LVL, lpx:EWP

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	35	30	36	34	37	40	30	28	36	40	36	36	37	37	33
Percentage of Revenues	4.4	5.5	6.2	6.3	6.1	6.8	5.3	4.8	4.9	4.9	5.3	5.1	5.2	5.4	5.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	4.4	5.5	6.2	6.3	6.1	6.8	5.3	4.8	4.9	4.9	5.3	5.1	5.2	5.4	5.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:LVL lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0	0.0	99.3	100.8	99.0	100.0	99.2	100.0	100.0	100.0

lpx:OSBcommodity, lpx:Osb

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	198	108	113	83	100	97	106	137	197	231	181	214	209	190	151
Percentage of Revenues	24.9	19.7	19.3	15.5	16.6	16.5	18.4	23.3	26.7	28.5	26.2	30.2	29.2	27.5	24.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	24.9	19.7	19.3	15.5	16.6	16.5	18.4	23.3	26.7	28.5	26.2	30.2	29.2	27.5	24.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OSBcommodity lpx:Osb	0.0	0.0	0.0	0.0	0.0	0.0	0.0	99.6	100.3	99.8	100.0	100.2	100.0	100.0	100.0

lpx:OSBvalueadd, lpx:Osb

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	162	95	103	86	96	100	98	116	151	155	129	140	139	132	113
Percentage of Revenues	20.4	17.3	17.6	16.0	15.9	17.0	16.9	19.7	20.5	19.1	18.7	19.8	19.4	19.0	18.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	20.4	17.3	17.6	16.0	15.9	17.0	16.9	19.7	20.5	19.1	18.7	19.8	19.4	19.0	18.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OSBvalueadd lpx:Osb	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.4	100.1	100.1	100.0	100.2	100.0	100.0	100.0

lpx:OSBvalueadd, srt:SouthAmerica

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	40	32	32	33	32	35	38	32	30	37	34
Percentage of Revenues	5.0	5.8	5.5	6.1	5.3	6.0	6.5	5.4	4.1	4.6	5.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	5.0	5.8	5.5	6.1	5.3	6.0	6.5	5.4	4.1	4.6	5.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:OSBvalueadd srt:SouthAmerica	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

lpx:Otherproducts, lpx:EWP

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	10.0	4.0	7.0	8.0	8.0	5.0	9.7	8.0	10.0	7.0	9.3
Percentage of Revenues	1.3	0.7	1.2	1.5	1.3	0.9	1.7	1.4	1.4	0.9	1.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.3	0.7	1.2	1.5	1.3	0.9	1.7	1.4	1.4	0.9	1.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Otherproducts lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0	0.0	177.8	212.8	250.0	221.4

lpx:Otherproducts, lpx:Osb

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	8.0	1.0	4.0	3.0	2.0	1.0	3.2	2.0	2.0	1.0	3.1	3.5	2.3	2.2	4.0
Percentage of Revenues	1.0	0.2	0.7	0.6	0.3	0.2	0.6	0.3	0.3	0.1	0.4	0.5	0.3	0.3	0.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.0	0.2	0.7	0.6	0.3	0.2	0.6	0.3	0.3	0.1	0.4	0.5	0.3	0.3	0.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Otherproducts lpx:Osb	0.0	0.0	0.0	0.0	0.0	0.0	0.0	83.3	117.6	90.9	100.0	92.1	100.0	100.0	100.0

lpx:Otherproducts, lpx:Siding

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	2.0	2.0	2.0	2.0	2.0	2.0	2.9	3.0	2.0	3.0	4.2	2.4	2.9	2.2	2.5
Percentage of Revenues	0.3	0.4	0.3	0.4	0.3	0.3	0.5	0.5	0.3	0.4	0.6	0.3	0.4	0.3	0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.3	0.4	0.3	0.4	0.3	0.3	0.5	0.5	0.3	0.4	0.6	0.3	0.4	0.3	0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Otherproducts lpx:Siding	0.0	0.0	0.0	0.0	0.0	0.0	0.0	107.1	100.0	103.4	100.0	96.0	100.0	100.0	100.0

lpx:Otherproducts, srt:SouthAmerica

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	1.0	1.0	1.0	1.0	1.0	1.0	0.0	1.0	1.0	1.0	0.7
Percentage of Revenues	0.1	0.2	0.2	0.2	0.2	0.2	0.0	0.2	0.1	0.1	0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.1	0.2	0.2	0.2	0.2	0.2	0.0	0.2	0.1	0.1	0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Otherproducts srt:SouthAmerica	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

lpx:Otherproducts, us-gaap:AllOtherSegments

Period End	2020-09-30	2020-06-30	2020-03-31	2019-03-31	2018-03-31
Value	11	4.0	7.0	4.4	2.8
Percentage of Revenues	1.4	0.7	1.2	0.8	0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	1.4	0.7	1.2	0.8	0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Otherproducts us-gaap:AllOtherSegments	0.0	0.0	0.0	0.0	35.4

lpx:Plywood, lpx:EWP

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	7.0	3.0	6.0	6.0	7.0	6.0	6.7	6.0	8.0	8.0	7.6	6.2	8.2	5.8	4.8
Percentage of Revenues	0.9	0.5	1.0	1.1	1.2	1.0	1.2	1.0	1.1	1.0	1.1	0.9	1.1	0.8	0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.9	0.5	1.0	1.1	1.2	1.0	1.2	1.0	1.1	1.0	1.1	0.9	1.1	0.8	0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Plywood lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0	0.0	111.1	103.9	100.0	100.0	98.4	100.0	100.0	100.0

lpx:SmartSideFibersiding, lpx:Siding

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	6.0	11	19	22	28	25	25	22	30	28	25	24	28	29	28
Percentage of Revenues	0.8	2.0	3.2	4.1	4.6	4.3	4.4	3.7	4.1	3.5	3.7	3.5	4.0	4.2	4.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.8	2.0	3.2	4.1	4.6	4.3	4.4	3.7	4.1	3.5	3.7	3.5	4.0	4.2	4.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:SmartSideFibersiding lpx:Siding	0.0	0.0	0.0	0.0	0.0	0.0	0.0	99.1	98.7	100.4	100.0	98.8	100.0	100.0	100.0

lpx:SmartSideStrandsiding, lpx:Siding

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	260	207	191	197	213	200	187	179	188	194	165	164	161	164	156
Percentage of Revenues	32.7	37.8	32.6	36.7	35.3	34.0	32.2	30.4	25.5	23.9	23.9	23.1	22.5	23.7	25.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	32.7	37.8	32.6	36.7	35.3	34.0	32.2	30.4	25.5	23.9	23.9	23.1	22.5	23.7	25.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:SmartSideStrandsiding lpx:Siding	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.3	100.2	100.3	100.0	99.8	100.0	100.0	100.0

lpx:SmartSideStrandsiding, srt:SouthAmerica

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	4.0	5.0	3.0	5.0	4.0	4.0	6.0	5.0	3.0	7.0	6.8
Percentage of Revenues	0.5	0.9	0.5	0.9	0.7	0.7	1.0	0.8	0.4	0.9	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.5	0.9	0.5	0.9	0.7	0.7	1.0	0.8	0.4	0.9	1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:SmartSideStrandsiding srt:SouthAmerica	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Revenues us-gaap:StatementBusinessSegments

lpx:EWP

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	158	123	103	79	99	93	105	107	90	80	110	113	105
Percentage of Revenues	11.9	12.1	13.0	14.4	16.9	17.3	17.4	18.2	15.5	13.6	14.9	13.9	15.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	11.9	12.1	13.0	14.4	16.9	17.3	17.4	18.2	15.5	13.6	14.9	13.9	15.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:EWP	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	104.8	105.0	103.6	105.1

lpx:LPSouthAmerica

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	74	53	38	36
Percentage of Revenues	5.6	5.2	6.9	6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	5.6	5.2	6.9	6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:LPSouthAmerica	0.0	0.0	0.0	0.0

lpx:Osb

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	778	539	368	204	220	172	197	199	208	255	349	387	313	358	350	325	268	275	282	252	217	206	200	211	190	203	233	223	194	229	245	306	286	243	226	194	149	130	138	140	132	127	140	217
Percentage of Revenues	58.7	53.0	46.3	37.2	37.6	32.0	32.7	33.8	35.8	43.3	47.4	47.7	45.3	50.5	48.9	46.8	43.9	50.1	47.3	43.4	43.0	44.6	43.0	42.8	40.3	44.8	45.0	43.1	43.8	47.9	48.4	53.5	53.3	53.0	48.4	45.6	41.2	41.8	39.6	38.8	39.8	40.2	43.4	48.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	58.7	53.0	46.3	37.2	37.6	32.0	32.7	33.8	35.8	43.3	47.4	47.7	45.3	50.5	48.9	46.8	43.9	50.1	47.3	43.4	43.0	44.6	43.0	42.8	40.3	44.8	45.0	43.1	43.8	47.9	48.4	53.5	53.3	53.0	48.4	45.6	41.2	41.8	39.6	38.8	39.8	40.2	43.4	48.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Osb	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	99.8	100.0	99.9	100.0	100.1	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

lpx:Siding

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	291	285	268	220	212	230	259	238	235	213	241	262	227	212	226	231	214	169	194	207	181	141	157	163	173	140	163	169	143	138	149	152	133	116	134	137	113	93	112	118	106	102	104	130
Percentage of Revenues	22.0	28.0	33.7	40.1	36.2	42.8	43.0	40.5	40.5	36.2	32.7	32.3	32.8	29.9	31.5	33.3	35.0	30.7	32.7	35.6	35.9	30.5	33.9	33.2	36.8	31.1	31.5	32.7	32.3	28.8	29.4	26.7	24.9	25.4	28.7	32.0	31.3	29.8	31.9	32.7	32.0	32.5	32.4	29.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	22.0	28.0	33.7	40.1	36.2	42.8	43.0	40.5	40.5	36.2	32.7	32.3	32.8	29.9	31.5	33.3	35.0	30.7	32.7	35.6	35.9	30.5	33.9	33.2	36.8	31.1	31.5	32.7	32.3	28.8	29.4	26.7	24.9	25.4	28.7	32.0	31.3	29.8	31.9	32.7	32.0	32.5	32.4	29.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax lpx:Siding	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.0	100.1	100.2	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

srt:SouthAmerica

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	45	38	36	38	36	40	44	39	35	45	42
Percentage of Revenues	5.7	6.9	6.2	7.1	6.0	6.8	7.7	6.6	4.7	5.5	6.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	5.7	6.9	6.2	7.1	6.0	6.8	7.7	6.6	4.8	5.6	6.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:SouthAmerica	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AllOtherSegments

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	26	18	11	7.0	18	4.0	6.0	5.0	4.4	2.0	3.0	3.0	2.8
Percentage of Revenues	2.0	1.8	1.4	1.3	3.1	0.7	1.0	0.9	0.8	0.3	0.4	0.4	0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	2.0	1.8	1.4	1.3	3.1	0.7	1.0	0.9	0.8	0.3	0.4	0.4	0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AllOtherSegments	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	33.3	39.5	40.5	35.4

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	57	48	54	52	50	55	58	58	58	56	57	51	50	50	45	49	47	48	47	47	46	42	37	38	37	38	40	31	35	40	46	33	35	35	36	30	30	31	28	26	27	28	31	27	29	30
Percentage of SellingGeneralAndAdministrativeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	4.3	4.7	6.3	6.5	9.1	9.4	10.8	9.6	9.9	9.7	9.7	6.9	6.2	7.3	6.4	6.8	6.8	8.0	8.7	7.9	8.0	8.4	8.2	8.2	7.7	8.2	9.0	6.2	6.9	9.2	9.7	6.6	6.2	6.6	8.0	6.5	7.2	8.7	9.1	7.6	7.6	8.7	10.0	8.6	6.6	10.1

Assets

us-gaap:Assets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	2367	2343	2086	1973	1807	2132	1835	2043	2090	2094	2514	2614	2620	2499	2448	2308	2162	2080	2031	2432	2273	2215	2176	2209	2236	2299	2353	2409	2432	2494	2493	2497	2571	2472	2331	2313	2256	2147	2139	2203	2336	2392	2410
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment

Period End	2020-12-31	2019-12-31
Value	778	469
Percentage of Assets	37.3	25.6
Percentage of Assets	37.3	25.6
Percentage of Assets us-gaap:CorporateNonSegment	100.0	100.0

us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lpx:EWP

Period End	2020-12-31	2019-12-31
Value	152	146
Percentage of Assets	7.3	8.0
Percentage of Assets	7.3	8.0
Percentage of Assets us-gaap:OperatingSegments lpx:EWP	100.0	100.0

us-gaap:OperatingSegments, lpx:Osb

Period End	2020-12-31	2019-12-31
Value	511	558
Percentage of Assets	24.5	30.4
Percentage of Assets	24.5	30.4
Percentage of Assets us-gaap:OperatingSegments lpx:Osb	100.0	100.0

us-gaap:OperatingSegments, lpx:Siding

Period End	2020-12-31	2019-12-31
Value	521	516
Percentage of Assets	25.0	28.1
Percentage of Assets	25.0	28.1
Percentage of Assets us-gaap:OperatingSegments lpx:Siding	100.0	100.0

us-gaap:OperatingSegments, lpx:SouthAmericaSegment

Period End	2020-12-31	2019-12-31
Value	106	109
Percentage of Assets	5.1	5.9
Percentage of Assets	5.1	5.9
Percentage of Assets us-gaap:OperatingSegments lpx:SouthAmericaSegment	100.0	100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments

Period End	2020-12-31	2019-12-31
Value	19	37
Percentage of Assets	0.9	2.0
Percentage of Assets	0.9	2.0
Percentage of Assets us-gaap:OperatingSegments us-gaap:AllOtherSegments	100.0	100.0

Liabilities

us-gaap:Liabilities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31
Value	925	930	842	820	796	1138	834	814
Percentage of Liabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	39.1	39.7	40.4	41.6	44.1	53.4	45.4	32.4

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	2367	2343	2086	1973	1807	2132	1835	2043	2090	2094	2514	2614	2620	2499	2448	2308	2162	2080	2031	2432	2273	2215	2176	2209	2236	2299	2353	2409	2432	2494	2493	2497	2571	2472	2331	2313	2256	2147	2139	2203	2336	2392	2410
Percentage of LiabilitiesAndStockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	1433	1404	1234	1142	1000	984	991	1213	1278	1272	1700	1811	1765	1672	1604	1465	1348	1254	1195	1152	1084	1051	1017	1023	1056	1075	1115	1191	1217	1211	1226	1223	1182	1092	1033	992	956	995	1000	1084	1171	1198	1217
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	60.5	59.9	59.2	57.9	55.3	46.2	54.0	59.4	61.1	60.8	67.6	69.3	67.4	66.9	65.5	63.5	62.3	60.3	58.9	47.4	47.7	47.5	46.7	46.3	47.3	46.8	47.4	49.5	50.1	48.6	49.2	49.0	46.0	44.2	44.4	42.9	42.4	46.4	46.8	49.2	50.1	50.1	50.5

Assets Current

us-gaap:AssetsCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	1230	1226	993	904	689	976	619	761	828	845	1287	1426	1462	1405	1359	1290	1155	1074	1016	1445	876	815	769	840	870	928	950	982	982	1039	1034	1059	1137	1143	995	963	903	678	656	690	691	722	713
Percentage of AssetsCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	52.0	52.3	47.6	45.8	38.1	45.8	33.7	37.2	39.6	40.4	51.2	54.6	55.8	56.2	55.5	55.9	53.4	51.6	50.0	59.4	38.5	36.8	35.3	38.1	38.9	40.4	40.4	40.8	40.4	41.7	41.5	42.4	44.2	46.2	42.7	41.6	40.1	31.6	30.7	31.4	29.6	30.2	29.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31	2009-12-31	2008-12-31
Value	590	645	535	420	259	488	181	304	348	361	878	986	1000	895	928	848	740	649	659	559	474	404	434	447	481	468	532	579	554	551	656	669	630	560	560	490	427	280	340	360	334	321	389	382	437	357	394	97
Percentage of CashAndCashEquivalentsAtCarryingValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	24.9	27.5	25.6	21.3	14.3	22.9	9.9	14.9	16.7	17.2	34.9	37.7	38.2	35.8	37.9	36.8	34.2	31.2	32.5	23.0	20.9	18.2	20.0	20.3	21.5	20.4	22.6	24.1	22.8	22.1	26.3	26.8	24.5	22.7	24.1	21.2	18.9	13.1	15.9	16.3	14.3	13.4	16.1	0.0	0.0	0.0	0.0	0.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2015-12-31
Value	603	658	535	420	259	488	195	318	362	375	891	1000	1014	909	941	861	753	662	672	449
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	25.5	28.1	25.6	21.3	14.3	22.9	10.6	15.6	17.3	17.9	35.5	38.2	38.7	36.4	38.4	37.3	34.8	31.9	33.1	20.6

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31
Value	310	264	184	228	175	172	164	183	177	165	127	143	162	149	142	171	153	149	108	138	151	146	96	120	124	137	108
Percentage of AccountsReceivableNetCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	13.1	11.3	8.8	11.6	9.7	8.1	8.9	9.0	8.5	7.9	5.1	5.5	6.2	6.0	5.8	7.4	7.1	7.2	5.3	5.7	6.7	6.6	4.4	5.4	5.6	6.0	4.6

Receivables Net Current

us-gaap:ReceivablesNetCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	310	264	184	228	175	172	164	183	177	165	127	143	162	149	142	171	153	149	108	138	151	146	96	120	124	137	108	142	145	143	78	109	103	135	80	104	99	107	65	86	93	98	66
Percentage of ReceivablesNetCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	13.1	11.3	8.8	11.6	9.7	8.1	8.9	9.0	8.5	7.9	5.1	5.5	6.2	6.0	5.8	7.4	7.1	7.2	5.3	5.7	6.7	6.6	4.4	5.4	5.6	6.0	4.6	5.9	6.0	5.7	3.1	4.4	4.0	5.5	3.5	4.5	4.4	5.0	3.0	3.9	4.0	4.1	2.8

Inventory Net

us-gaap:InventoryNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	311	307	259	238	240	284	265	260	293	309	273	284	286	329	259	231	221	260	234	227	231	250	222	230	224	262	229	218	235	276	224	225	247	255	209	209	203	212	163	156	173	202	151
Percentage of InventoryNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	13.1	13.1	12.4	12.1	13.3	13.3	14.4	12.7	14.0	14.8	10.9	10.9	10.9	13.2	10.6	10.0	10.3	12.5	11.5	9.3	10.2	11.3	10.2	10.4	10.1	11.4	9.8	9.1	9.7	11.1	9.0	9.0	9.6	10.3	9.0	9.0	9.0	9.9	7.6	7.1	7.4	8.5	6.3

Machinery And Equipment Gross

us-gaap:MachineryAndEquipmentGross

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	1971	1965	1949	1977	1881	1897	1838	1794	1642	1636	1702
Percentage of MachineryAndEquipmentGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	94.5	107.1	77.5	80.8	92.6	87.2	78.1	72.0	70.4	76.5	70.6

Noncurrent Assets

us-gaap:NoncurrentAssets

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	977	1034	1073	982	938	916	918	940	784	841
Percentage of NoncurrentAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	46.8	56.3	42.7	40.1	46.2	42.1	39.0	37.7	33.6	39.3

us-gaap:NoncurrentAssets us-gaap:StatementGeographical

country:CA

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	367	390	449	380	365	360	329	313	144	158
Percentage of NoncurrentAssets	37.6	37.7	41.8	38.7	38.9	39.3	35.8	33.3	18.4	18.8
Percentage of Assets	17.6	21.3	17.9	15.5	18.0	16.5	14.0	12.6	6.2	7.4
Percentage of Assets country:CA	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

country:US

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	533	570	540	529	516	506	523	544	540	576
Percentage of NoncurrentAssets	54.6	55.1	50.3	53.9	55.0	55.2	57.0	57.9	68.9	68.5
Percentage of Assets	25.6	31.1	21.5	21.6	25.4	23.3	22.2	21.8	23.2	26.9
Percentage of Assets country:US	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

srt:SouthAmerica

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	77	74	82	69
Percentage of NoncurrentAssets	7.9	7.2	7.6	7.0
Percentage of Assets	3.7	4.0	3.3	2.8
Percentage of Assets srt:SouthAmerica	0.0	0.0	0.0	0.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	2562	2529	2595	2586	2472	2436	2426	2410	2459	2434	2411	2392	2346	2327	2313	2315	2299	2311	2305	2294	2214	2218	2073	2061	2066	2027	2033	2028	2039	2124	2112	2112
Percentage of PropertyPlantAndEquipmentGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	122.8	137.8	103.2	105.6	107.1	112.6	116.6	118.7	101.1	107.1	108.9	109.9	106.2	104.1	100.6	98.4	95.4	95.0	92.4	92.0	88.7	86.2	83.9	88.4	89.3	89.9	94.7	94.8	92.6	90.9	88.3	87.6

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:Timber

Period End	2020-12-31	2019-12-31
Value	18	25
Percentage of PropertyPlantAndEquipmentGross	0.7	1.0
Percentage of Assets	0.9	1.4
Percentage of Assets us-gaap:Timber	0.0	0.0

Construction In Progress Gross

us-gaap:ConstructionInProgressGross

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	63	46	148	98	48	33	18	46	22	5.5	4.8
Percentage of ConstructionInProgressGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	3.0	2.5	5.9	4.0	2.4	1.5	0.8	1.8	1.0	0.3	0.2

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	1644	1564	1585	1660	1599	1569	1549	1527	1603	1579	1554	1530	1518	1503	1483	1464	1443	1432	1422	1407	1350	1341	1327	1310	1314	1278	1264	1245	1246	1237	1213	1195
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	78.8	85.2	63.1	67.8	69.3	72.6	74.5	75.2	65.9	69.5	70.2	70.3	68.7	67.2	64.5	62.2	59.9	58.9	57.0	56.5	54.1	52.1	53.7	56.2	56.8	56.7	58.9	58.2	56.6	53.0	50.7	49.6

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:AmortizationOfIntangibleAssets

us-gaap:DevelopedTechnologyRights

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-06-30	2019-03-31
Value	0	1000000.0	1000000.0	0	0	1000000.0	0
Percentage of AmortizationOfIntangibleAssets	0.0	100.0	100.0	0.0	0.0	100.0	0.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:DevelopedTechnologyRights	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:ProductiveLand

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-06-30	2019-03-31
Value	1000000.0	1000000.0	1000000.0	1000000.0	1000000.0	1000000.0	-1000000.0
Percentage of AmortizationOfIntangibleAssets	0.0	100.0	100.0	0.0	0.0	100.0	0.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:ProductiveLand	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	938	921	918	902	912	930	965	1034	1038	1031	1010	976	946	932	926	872	866	876	883	855	855	857	862	828	824	830	850	856	878	883	886	864	876	746	750	752	749	769	782	792	887	899	917
Percentage of PropertyPlantAndEquipmentNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	39.6	39.3	44.0	45.7	50.5	43.6	52.6	50.6	49.7	49.2	40.2	37.3	36.1	37.3	37.8	37.8	40.1	42.2	43.5	35.2	37.6	38.7	39.6	37.5	36.9	36.1	36.1	35.5	36.1	35.4	35.6	34.6	34.1	30.2	32.2	32.5	33.2	35.8	36.6	36.0	38.0	37.6	38.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	10.0	9.0	11	12	11	12	10.0	10.0	9.0	9.3	49	52	53	8.5	7.8	7.4	7.2	6.8	6.2	7.4	7.4	7.2	7.7	7.4	7.1	5.7	5.0	6.4	5.0	3.8	3.2	4.2	4.3	73	68	70	76	79	79	98	103	108	110
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.4	0.4	0.5	0.6	0.6	0.6	0.5	0.5	0.4	0.4	2.0	2.0	2.1	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.4	0.3	0.3	0.2	0.2	0.3	0.2	0.2	0.1	0.2	0.2	3.0	2.9	3.0	3.4	3.7	3.7	4.5	4.4	4.5	4.6

Goodwill

us-gaap:Goodwill

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31
Value	25	25	25	25	25	30	30	30	30	26	16	26	26	26	16	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	0.0	0.0
Percentage of Goodwill	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0
Percentage of Assets	1.1	1.1	1.2	1.3	1.4	1.4	1.6	1.5	1.4	1.2	0.6	1.0	1.0	1.1	0.7	0.4	0.4	0.5	0.5	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.0	0.0

us-gaap:Goodwill us-gaap:ReportingUnit

lpx:Siding

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	4.0	4.0	0.0	0.0
Percentage of Goodwill	16.0	13.3	0.0	0.0
Percentage of Assets	0.2	0.2	0.0	0.0
Percentage of Assets lpx:Siding	0.0	0.0	0.0	0.0

us-gaap:AllOtherSegments

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	5.0	10.0	0.0	0.0
Percentage of Goodwill	20.0	33.3	0.0	0.0
Percentage of Assets	0.2	0.5	0.0	0.0
Percentage of Assets us-gaap:AllOtherSegments	0.0	0.0	0.0	0.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	56	61	51	55	0.6	0.8	1.0	1.2	1.4	1.6	1.8	2.0	2.2
Percentage of IntangibleAssetsNetExcludingGoodwill	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.7	3.3	2.0	2.2	0.0	0.0	0.0	0.1	0.1	0.1	0.1	0.1	0.1

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:LicensingAgreements

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	34	38	41	44
Percentage of IntangibleAssetsNetExcludingGoodwill	60.7	62.3	80.4	80.0
Percentage of Assets	1.6	2.1	1.6	1.8
Percentage of Assets us-gaap:LicensingAgreements	0.0	0.0	0.0	0.0

us-gaap:TechnologyBasedIntangibleAssets

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	19	20	10.0	11
Percentage of IntangibleAssetsNetExcludingGoodwill	33.9	32.8	19.6	20.0
Percentage of Assets	0.9	1.1	0.4	0.4
Percentage of Assets us-gaap:TechnologyBasedIntangibleAssets	0.0	0.0	0.0	0.0

us-gaap:Trademarks

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	3.0	3.0	0.0	0.0
Percentage of IntangibleAssetsNetExcludingGoodwill	5.4	4.9	0.0	0.0
Percentage of Assets	0.1	0.2	0.0	0.0
Percentage of Assets us-gaap:Trademarks	0.0	0.0	0.0	0.0

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:StatementGeographical, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

country:CA, us-gaap:LicensingAgreements

Period End	2020-12-31
Value	91
Percentage of IntangibleAssetsNetExcludingGoodwill	162.5
Percentage of Assets	4.4
Percentage of Assets country:CA us-gaap:LicensingAgreements	0.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:DevelopedTechnologyRights

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	18	18	19	19	20	20	20	21	21	22	10.0
Percentage of FiniteLivedIntangibleAssetsNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.8	0.8	0.9	1.0	1.1	0.9	1.1	1.0	1.0	1.1	0.4
Percentage of Assets us-gaap:DevelopedTechnologyRights	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:OtherIntangibleAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2012-12-31
Value	2.0	2.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	0.0	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Percentage of FiniteLivedIntangibleAssetsNet	11.1	11.1	15.8	15.8	15.0	15.0	15.0	14.3	14.3	13.6	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets	0.1	0.1	0.1	0.2	0.2	0.1	0.2	0.1	0.1	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:OtherIntangibleAssets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31
Value	45	45	46	47	48	53	53	54	51	47	66	70	56	60	74	77
Percentage of IntangibleAssetsNetIncludingGoodwill	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.9	1.9	2.2	2.4	2.7	2.5	2.9	2.6	2.4	2.3	2.7	2.9	2.8	2.8	3.2	3.1

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	65	71	63	103	160
Percentage of DeferredTaxAssetsLiabilitiesNet	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	3.1	3.9	2.5	4.2	7.9

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	37	39	40	40	42	43	44	41	22	22	0.0
Percentage of OperatingLeaseRightOfUseAsset	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0
Percentage of Assets	1.6	1.7	1.9	2.0	2.3	2.0	2.4	2.0	1.1	1.1	0.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	26	24	24	20	50	62	69	82	68	65	61	59	59	56	56	57	56	23	22	22	22	22	23	21	22	17	17	45	45	34	33	33	15	16	14	27	26	26	24	23	25	25	24
Percentage of OtherAssetsNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.1	1.0	1.2	1.0	2.8	2.9	3.8	4.0	3.3	3.1	2.4	2.3	2.3	2.3	2.3	2.5	2.6	1.1	1.1	0.9	1.0	1.0	1.1	1.0	1.0	0.8	0.7	1.9	1.9	1.4	1.4	1.4	0.6	0.6	0.6	1.2	1.2	1.2	1.2	1.1	1.1	1.1	1.0

Accounts Payable And Accrued Liabilities Current

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	315	262	267	242	204	208	242	213	223	228	233	213	211	187	237	212	203	210	222	193	173	161	139	162	149	182	168	171	154	192	161	173	165	154	139	165	150	142	122	129	127	131	127
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	13.3	11.2	12.8	12.3	11.3	9.8	13.2	10.4	10.7	10.9	9.3	8.2	8.1	7.5	9.7	9.2	9.4	10.1	11.0	8.0	7.6	7.3	6.4	7.4	6.7	7.9	7.2	7.1	6.3	7.7	6.5	6.9	6.4	6.3	6.0	7.2	6.7	6.7	5.7	5.9	5.4	5.5	5.3

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31	2015-12-31	2012-12-31	2011-12-31	2010-12-31
Value	36	97	18	13	6.0	0.0	1.0	1.0	1.1	21	11	15	21	4.5	7.4	31	0.0	0.0	0.1	0.1
Percentage of AccruedIncomeTaxesCurrent	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	100.0	100.0
Percentage of Assets	1.5	4.1	0.9	0.7	0.3	0.0	0.0	0.0	0.1	0.8	0.4	0.6	0.9	0.2	0.3	1.5	0.0	0.0	0.0	0.0

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

Period End	2020-12-31	2019-12-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	44	34	30	27	23	18	24	19	13	15	9.1	8.7
Percentage of AccruedLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.1	1.9	1.2	1.1	0.9	0.7	1.0	1.0	0.6	0.7	0.4	0.4

Liabilities Current

us-gaap:LiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	353	360	286	244	219	214	244	216	229	237	261	232	257	237	270	245	230	215	228	653	176	165	143	166	153	186	172	176	158	197	166	177	264	254	239	275	259	161	139	143	141	138	135
Percentage of LiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	14.9	15.4	13.7	12.4	12.1	10.0	13.3	10.6	11.0	11.3	10.4	8.9	9.8	9.5	11.0	10.6	10.7	10.4	11.3	26.9	7.8	7.5	6.6	7.5	6.9	8.1	7.3	7.3	6.5	7.9	6.7	7.1	10.3	10.3	10.3	11.9	11.5	7.5	6.5	6.5	6.1	5.8	5.6

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	8000000.0	8000000.0	0
Percentage of OperatingLeaseLiabilityCurrent	100.0	100.0	0.0
Percentage of Assets	0.4	0.4	0.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	13	14	9.7	6.8	5.6	5.6	18	7.7	16	15	19
Percentage of OtherAccruedLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.6	0.8	0.4	0.3	0.3	0.3	0.8	0.3	0.7	0.7	0.8

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2019-12-31
Value	1000000.0	1000000.0	1000000.0	2000000.0	2000000.0	2000000.0
Percentage of OtherLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.1	0.1	0.1

Taxes Payable Current

us-gaap:TaxesPayableCurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	15	7.0	4.0
Percentage of TaxesPayableCurrent	100.0	100.0	100.0
Percentage of Assets	0.7	0.4	0.2

Long Term Debt

us-gaap:LongTermDebt

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2016-09-30	2015-12-31	2014-12-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	348	348	351	375	377	832	757	761	765	765	874	880	880	891	888	733	729	726	719	714
Percentage of LongTermDebt	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	16.7	19.0	14.0	15.4	18.6	34.2	34.8	32.4	30.7	30.7	34.0	35.6	37.8	38.5	39.4	34.2	34.1	33.0	30.8	29.6

us-gaap:LongTermDebt us-gaap:DebtInstrument

lpx:Seniorunsecurednotesmaturing2024

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	348	347	346	345	345
Percentage of LongTermDebt	100.0	99.7	98.4	91.9	91.5
Percentage of Assets	16.7	18.9	13.8	14.1	17.0
Percentage of Assets lpx:Seniorunsecurednotesmaturing2024	0.0	0.0	0.0	0.0	0.0

us-gaap:LongTermDebt us-gaap:LongtermDebtType

us-gaap:OtherDebtSecurities

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2016-09-30	2015-12-31
Value	1.0	1.0	1.0	0.7	1.3	1.4	0.3
Percentage of LongTermDebt	0.3	0.3	0.3	0.2	0.3	0.2	0.0
Percentage of Assets	0.0	0.1	0.0	0.0	0.1	0.1	0.0
Percentage of Assets us-gaap:OtherDebtSecurities	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

Period End	2020-12-31	2019-12-31	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	348	348	348	347	346	348	348	351	350	353	352	374	374	374	745	751	751	751	753	757	759	759	761	761	762	763	777	782	782	785	784	719	715	716	716	716	714
Percentage of LongTermDebtNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	16.7	19.0	16.7	16.6	13.8	13.3	13.3	14.0	14.3	15.3	16.3	18.0	18.4	15.4	32.8	33.9	34.5	34.0	33.7	33.0	32.3	31.5	31.3	30.5	30.6	30.6	30.2	31.6	33.6	34.0	34.8	33.5	33.5	32.5	30.7	29.9	29.6

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2018-12-31
Value	346	346	351	348	348	698	348	348	347
Percentage of LongTermDebtAndCapitalLeaseObligations	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	14.6	14.8	16.8	17.6	19.3	32.7	19.0	17.0	13.8

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	88	82	78	72	71	65	73
Percentage of DeferredIncomeTaxLiabilitiesNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	3.7	3.5	3.7	3.6	3.9	3.0	4.0

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	17	23	23	68	92	90	93	52	92	93	61
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.8	1.3	0.9	2.8	4.6	4.1	4.0	2.1	4.0	4.3	2.6

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	97	99	86	124	125	127	125	223	126	130	134	138	180	184	178	180	181	195	191	150	155	145	149	141	142	147	153	127	133	133	136	171	181	166	168	140	142	145	160	121	130	128	129
Percentage of OtherLiabilitiesNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.1	4.2	4.1	6.3	6.9	6.0	6.8	10.9	6.0	6.2	5.4	5.3	6.9	7.4	7.3	7.8	8.4	9.4	9.4	6.2	6.8	6.6	6.9	6.4	6.4	6.4	6.5	5.3	5.5	5.4	5.5	6.9	7.1	6.7	7.2	6.1	6.3	6.8	7.5	5.5	5.6	5.4	5.4

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	29	30	32	32	33	34	36	33	14	14	0.0
Percentage of OperatingLeaseLiabilityNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0
Percentage of Assets	1.2	1.3	1.5	1.6	1.8	1.6	2.0	1.6	0.7	0.7	0.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

Period End	2020-12-31
Value	7000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	100.0
Percentage of Assets	0.3

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

Period End	2020-12-31
Value	4000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree	100.0
Percentage of Assets	0.2

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

Period End	2020-12-31
Value	3000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour	100.0
Percentage of Assets	0.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

Period End	2020-12-31
Value	2000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive	100.0
Percentage of Assets	0.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

Period End	2020-12-31
Value	27
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	100.0
Percentage of Assets	1.3

Operating Lease Liability

us-gaap:OperatingLeaseLiability

Period End	2020-12-31
Value	40
Percentage of OperatingLeaseLiability	100.0
Percentage of Assets	1.9

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

Period End	2020-12-31
Value	52
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue	100.0
Percentage of Assets	2.5

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

Period End	2020-12-31
Value	12
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	100.0
Percentage of Assets	0.6

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	1433	1404	1234	1142	1000	984	991	1213	1278	1272	1700	1811	1765	1672	1604	1465	1348	1254	1195	1152	1084	1051	1017	1023	1056	1075	1115	1191	1217	1211	1226	1223	1182	1092	1033	992	956	995	1000	1084	1171	1198	1217
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	60.5	59.9	59.2	57.9	55.3	46.2	54.0	59.4	61.1	60.8	67.6	69.3	67.4	66.9	65.5	63.5	62.3	60.3	58.9	47.4	47.7	47.5	46.7	46.3	47.3	46.8	47.4	49.5	50.1	48.6	49.2	49.0	46.0	44.2	44.4	42.9	42.4	46.4	46.8	49.2	50.1	50.1	50.5

Common Stock Value

us-gaap:CommonStockValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	114	121	124	129	130	130	130	135	141	141	153	153	153	153	153	153	153	153	153	153	153	153	153	153	152	152	152	152	152	152	152	152	150	150	150	150	149	149	149	149	145	144	144
Percentage of CommonStockValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.8	5.2	5.9	6.5	7.2	6.1	7.1	6.6	6.7	6.8	6.1	5.9	5.9	6.1	6.3	6.6	7.1	7.4	7.6	6.3	6.7	6.9	7.0	6.9	6.8	6.6	6.5	6.3	6.2	6.1	6.1	6.1	5.9	6.1	6.5	6.5	6.6	7.0	7.0	6.8	6.2	6.1	6.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	446	443	452	450	446	448	454	453	374	372	458	456	457	462	470	470	475	469	478	475	475	492	496	497	495	501	507	506	503	502	508	505	504	503	533	536	539	538	549	554	557	562	559
Percentage of AdditionalPaidInCapitalCommonStock	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	18.8	18.9	21.7	22.8	24.7	21.0	24.7	22.2	17.9	17.8	18.2	17.5	17.5	18.5	19.2	20.4	22.0	22.5	23.5	19.6	20.9	22.2	22.8	22.5	22.1	21.8	21.5	21.0	20.7	20.1	20.4	20.2	19.6	20.4	22.9	23.2	23.9	25.1	25.7	25.2	23.9	23.5	23.2

us-gaap:AdditionalPaidInCapitalCommonStock us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	446	443	452	450	446	448	454	453	374	372	458	456	457	462	470
Percentage of AdditionalPaidInCapitalCommonStock	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	18.8	18.9	21.7	22.8	24.7	21.0	24.7	22.2	17.9	17.8	18.2	17.5	17.5	18.5	19.2
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	1413	1390	1206	1132	999	983	966	1185	1315	1314	1612	1613	1508	1364	1280	1149	1039	945	890	848	782	750	724	731	758	777	812	855	875	873	887	908	870	775	710	664	633	670	681	739	804	840	863
Percentage of RetainedEarningsAccumulatedDeficit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	59.7	59.3	57.8	57.4	55.3	46.1	52.6	58.0	62.9	62.8	64.1	61.7	57.6	54.6	52.3	49.8	48.1	45.4	43.8	34.9	34.4	33.9	33.3	33.1	33.9	33.8	34.5	35.5	36.0	35.0	35.6	36.4	33.8	31.4	30.5	28.7	28.1	31.2	31.9	33.5	34.4	35.1	35.8

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	1413	1390	1206	1132	999	983	966	1185	1315	1314	1612	1613	1508	1364	1280
Percentage of RetainedEarningsAccumulatedDeficit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	59.7	59.3	57.8	57.4	55.3	46.1	52.6	58.0	62.9	62.8	64.1	61.7	57.6	54.6	52.3
Percentage of Assets us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31	2008-12-31
Value	-149000000.0	-157000000.0	-151000000.0	-170000000.0	-175000000.0	-175000000.0	-153000000.0	-152000000.0	-143000000.0	-144400000.0	-146400000.0	-148000000.0	-147300000.0	-134900000.0	-122100000.0	-129400000.0	-140800000.0	-133200000.0	-137200000.0	-134500000.0	-135100000.0	-139900000.0	-146100000.0	-146300000.0	-136500000.0	-137400000.0	-131300000.0	-96100000.0	-88000000.0	-89600000.0	-89200000.0	-109800000.0	-110800000.0	-104300000.0	-107900000.0	-101800000.0	-105400000.0	-100800000.0	-106200000.0	-79200000.0	-56500000.0	-68300000.0	-69600000.0	-64600000.0	-98100000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-6.3	-6.7	-7.2	-8.6	-9.7	-8.2	-8.3	-7.4	-6.8	-6.9	-5.8	-5.7	-5.6	-5.4	-5.0	-5.6	-6.5	-6.4	-6.8	-5.5	-5.9	-6.3	-6.7	-6.6	-6.1	-6.0	-5.6	-4.0	-3.6	-3.6	-3.6	-4.4	-4.3	-4.2	-4.6	-4.4	-4.7	-4.7	-5.0	-3.6	-2.4	-2.9	-2.9	0.0	0.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2017-12-31	2016-12-31
Value	-80000000.0	-81000000.0	-81000000.0	-86000000.0	-87000000.0	-88000000.0	-89000000.0	-90000000.0	-91000000.0	-92000000.0	-93000000.0	-98000000.0	-99000000.0	-84000000.0	-93000000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	53.7	51.6	53.6	50.6	49.7	50.3	58.2	59.2	63.6	63.7	63.5	66.2	67.2	68.8	67.8
Percentage of Assets	-3.4	-3.5	-3.9	-4.4	-4.8	-4.1	-4.9	-4.4	-4.4	-4.4	-3.7	-3.7	-3.8	-3.4	-4.6
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2013-12-31
Value	-2000000.0	-2000000.0	-2000000.0	0	3000000.0	3000000.0	3000000.0	4000000.0	3900000.0	4300000.0	4500000.0	4300000.0	4400000.0	3500000.0	3500000.0	3100000.0	3000000.0	2700000.0	2600000.0	3100000.0	3300000.0	3300000.0	2500000.0	2600000.0	2600000.0	2600000.0	2000000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	1.3	1.3	1.3	-0.0	-1.7	-2.0	-2.0	-2.8	-2.7	-2.9	-3.0	-2.9	-3.3	-2.9	-2.7	-2.2	-2.3	-2.0	-1.9	-2.3	-2.4	-2.3	-1.7	-1.9	-1.9	-2.0	-2.2
Percentage of Assets	-0.1	-0.1	-0.1	0.0	0.1	0.2	0.1	0.2	0.2	0.2	0.2	0.2	0.2	0.1	0.2	0.1	0.1	0.1	0.1	0.1	0.1	0.2	0.1	0.1	0.1	0.1	0.1
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	-149000000.0	-157000000.0	-151000000.0	-170000000.0	-175000000.0	-175000000.0	-153000000.0	-152000000.0	-143000000.0	-144400000.0	-146400000.0	-148000000.0	-147300000.0	-134900000.0	-122100000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-6.3	-6.7	-7.2	-8.6	-9.7	-8.2	-8.3	-7.4	-6.8	-6.9	-5.8	-5.7	-5.6	-5.4	-5.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedTranslationAdjustment

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2013-12-31
Value	-68000000.0	-75000000.0	-68000000.0	-84000000.0	-88000000.0	-90000000.0	-67000000.0	-64000000.0	-54000000.0	-55400000.0	-57000000.0	-53200000.0	-51200000.0	-37400000.0	-39700000.0	-41600000.0	-52000000.0	-43500000.0	-46300000.0	-44800000.0	-44900000.0	-49000000.0	-55100000.0	-53600000.0	-41600000.0	-41500000.0	-33700000.0	-19200000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	45.6	47.8	45.0	49.4	50.3	51.4	43.8	42.1	37.8	38.4	38.9	35.9	34.8	27.7	32.5	32.1	36.9	32.7	33.7	33.3	33.2	35.0	37.7	36.6	30.5	30.2	25.7	21.5
Percentage of Assets	-2.9	-3.2	-3.3	-4.3	-4.9	-4.2	-3.7	-3.1	-2.6	-2.6	-2.3	-2.0	-2.0	-1.5	-1.6	-1.8	-2.4	-2.1	-2.3	-1.8	-2.0	-2.2	-2.5	-2.4	-1.9	-1.8	-1.4	-0.8
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Treasury Stock Value

us-gaap:TreasuryStockValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	390	393	397	399	400	402	406	408	410	411	377	264	206	173	177	178	179	180	189	189	191	204	210	212	213	219	225	225	225	226	232	232	232	232	252	256	261	262	274	279	279	279	279
Percentage of TreasuryStockValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	16.5	16.8	19.0	20.2	22.1	18.9	22.1	20.0	19.6	19.7	15.0	10.1	7.9	6.9	7.2	7.7	8.3	8.7	9.3	7.8	8.4	9.2	9.7	9.6	9.5	9.6	9.6	9.4	9.3	9.1	9.3	9.3	9.0	9.4	10.8	11.1	11.6	12.2	12.8	12.7	12.0	11.7	11.6

us-gaap:TreasuryStockValue us-gaap:StatementEquityComponents

us-gaap:TreasuryStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	-390.0	-393.0	397	-399.0	-400.0	-402.0	406	-408.0	-410.0	-411.6	-377.6	-264.4	-206.2	-173.2	-177.5
Percentage of TreasuryStockValue	-100.0	-100.0	100.0	-100.0	-100.0	-100.0	100.0	-100.0	-100.0	-100.0	-100.0	-100.0	-100.0	-100.0	-100.0
Percentage of Assets	-16.5	-16.8	19.0	-20.2	-22.1	-18.9	22.1	-20.0	-19.6	-19.7	-15.0	-10.1	-7.9	-6.9	-7.2
Percentage of Assets us-gaap:TreasuryStock	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31
Value	4000000.0	1000000.0	5000000.0	1000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	3000000.0	2000000.0	-4400000.0	2100000.0	1800000.0	2300000.0	2400000.0	2500000.0	2300000.0	2100000.0	2100000.0	2200000.0	2200000.0	1900000.0	1700000.0	1900000.0	1800000.0	2700000.0	-5100000.0	2000000.0	900000.0	3500000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31
Value	4000000.0	1000000.0	5000000.0	1000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	3000000.0	2000000.0	-4400000.0	1400000.0	1000000.0	2300000.0	2400000.0	2500000.0	2300000.0	2100000.0	2100000.0	2200000.0	2200000.0	1900000.0	1700000.0	1900000.0	1800000.0	2700000.0	-5100000.0	2000000.0	900000.0	3500000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	66.7	55.6	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	457	314	321	218	129	-9.0	101	59	54	-54.0	91	151	237	30	168	143	140	20	102	136	109	-4.9	30	1.2	41	-44.0	-22.6	27	15	-73.0	19	59	146	16	63	65	47	-64.4	-6.4	5.1	29	-68.4	2.8	9.4	67	-32.1
Percentage of NetCashProvidedByUsedInOperatingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	34.5	30.9	37.3	27.4	23.5	-1.5	18.8	9.8	9.2	-9.3	15.5	20.5	29.3	4.4	23.7	20.0	20.3	3.4	18.5	22.8	18.7	-1.0	6.6	0.3	8.4	-9.3	-5.0	5.3	2.9	-16.4	4.1	11.7	25.6	3.1	13.7	14.1	11.0	-17.8	-2.0	1.5	8.1	-20.6	0.9	2.9	15.1	-10.8

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-31.0	-32.0	-24.0	-13.0	12	-24.0	-47.0	-40.0	-45.0	-4.5	-65.5	-62.9	-67.2	-42.6	-89.3	-34.8	-48.5	-26.0	458	-120.9	-25.3	-26.2	-45.1	-32.3	-24.0	-14.5	-22.4	-0.7	-16.3	-24.1	-29.4	88	-71.1	-4.9	20	-0.5	-2.8	4.2	-11.2	13	1.7	3.9	4.0	-5.9	125	-3.7
Percentage of NetCashProvidedByUsedInInvestingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-2.3	-3.1	-2.8	-1.6	2.2	-4.1	-8.8	-6.6	-7.7	-0.8	-11.1	-8.5	-8.3	-6.2	-12.6	-4.8	-7.0	-4.3	83.4	-20.3	-4.3	-5.2	-9.7	-6.9	-4.9	-3.1	-4.9	-0.1	-3.1	-5.4	-6.1	17.3	-12.4	-0.9	4.6	-0.1	-0.7	1.2	-3.6	3.8	0.5	1.2	1.3	-1.8	28.1	-1.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2010-09-30	2010-06-30
Value	-484.0	-158.0	-188.0	-45.0	-368.0	329	-176.0	-60.0	-22.0	-459.0	-133.7	-101.9	-59.9	-21.5	-1.2	-1.7	-1.0	-5.5	-460.3	69	-14.2	-1.9	2.8	-0.9	-2.6	-3.7	-0.2	-1.1	-0.1	-2.5	-1.2	-109.6	-2.9	-12.7	-10.5	0.6	102	0.0	-0.5	5.4	-20.6	-0.2	-60.3	-113.8
Percentage of NetCashProvidedByUsedInFinancingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-36.5	-15.5	-21.9	-5.7	-67.2	56.2	-32.8	-10.0	-3.7	-78.9	-22.7	-13.8	-7.4	-3.1	-0.2	-0.2	-0.1	-0.9	-83.7	11.6	-2.4	-0.4	0.6	-0.2	-0.5	-0.8	-0.0	-0.2	-0.0	-0.6	-0.3	-21.6	-0.5	-2.4	-2.3	0.1	23.8	0.0	-0.2	1.5	-5.7	-0.1	-18.7	-25.4

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	-55.0	122	115	161	-229.0	293	-123.0	-44.0	-13.0	-517.0	-108.2	-14.2	105	-32.2	79	108	90	-9.9
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-4.2	12.0	13.4	20.3	-41.8	50.1	-22.9	-7.3	-2.2	-88.9	-18.4	-1.9	13.0	-4.7	11.2	15.1	13.1	-1.6

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	3.0	4.0	1.0	0.0	5.0	-4.0	-8.0	5.0	-5.0	-6.0
Percentage of DeferredIncomeTaxExpenseBenefit	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30
Value	29	29	22	28	28	28	28	30	29	30	24	30	30	31	31	29	30	29	28	27	-77.9	25	25	26	-77.4	26	24	25	-63.4	25	20	18	-55.5	18	17
Percentage of DepreciationDepletionAndAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	3.0	50	18	-4.0	-38.0	36	11	-31.0	-19.0	36	-9.8	-1.7	-40.6	54	27	8.5	-37.8	24	7.8	-4.8	-18.9	26	-8.9	8.5	-37.3	34	13	-15.6	-40.0	51	5.4	-15.8	-20.5	48	2.9	5.6	-9.8	45	9.1	-14.6	-29.2	49	1.8	-17.5	-19.4	43
Percentage of IncreaseDecreaseInInventories	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	457	314	321	218	129	-9.0	101	59	54	-54.0	91	151	237	30	168	143	140	20	102	136	109	-4.9	30	1.2	41	-44.0	-22.6	27	15	-73.0	19	59	146	16	63	65	47	-64.4	-6.4	5.1	29	-68.4	2.8	9.4	67	-32.1
Percentage of NetCashProvidedByUsedInOperatingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	34.5	30.9	37.3	27.4	23.5	-1.5	18.8	9.8	9.2	-9.3	15.5	20.5	29.3	4.4	23.7	20.0	20.3	3.4	18.5	22.8	18.7	-1.0	6.6	0.3	8.4	-9.3	-5.0	5.3	2.9	-16.4	4.1	11.7	25.6	3.1	13.7	14.1	11.0	-17.8	-2.0	1.5	8.1	-20.6	0.9	2.9	15.1	-10.8

Net Income Loss

us-gaap:NetIncomeLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	498	320	256	177	33	33	-51.0	2.0	17	26	17	124	162	90	130	109	94	55	42	65	31	10	-7.6	-26.5	-19.5	-34.5	-42.9	-20.4	2.1	-14.2	-20.4	38	94	65	46	31	-37.3	-11.3	-57.2	-65.6	-35.5	-23.0	-6.8	-32.0	22	-22.5
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	37.6	31.5	29.8	22.3	6.0	5.6	-9.5	0.3	2.9	4.6	2.9	16.8	20.1	13.1	18.4	15.3	13.6	9.0	7.7	11.0	5.4	2.0	-1.6	-5.7	-4.0	-7.3	-9.5	-3.9	0.4	-3.2	-4.3	7.5	16.4	12.1	10.1	6.7	-8.7	-3.1	-18.3	-18.7	-9.8	-6.9	-2.1	-9.9	5.0	-7.6

us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments

us-gaap:AllOtherSegments

Period End	2021-06-30	2020-06-30
Value	498	33
Percentage of NetIncomeLoss	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	37.6	6.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AllOtherSegments	0.0	0.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2015-03-31	2014-12-31	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31
Value	498	320	177	33	33	2.0	17	26	124	163	90	-34.5	-42.9	-14.2	-20.4	38	94	65	46	31	-37.3	-11.3	-57.2	-65.6	-35.5	-23.0
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.2	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	37.6	31.5	22.3	6.0	5.6	0.3	2.9	4.6	16.8	20.1	13.1	-7.3	-9.5	-3.2	-4.3	7.5	16.4	12.1	10.1	6.7	-8.7	-3.1	-18.3	-18.7	-9.8	-6.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Profit Loss

us-gaap:ProfitLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	497	320	256	177	31	33	-52.0	1.0	16	26	16	124	163	91	-42.9	-21.2	0.6	-14.2	-20.4	38	94	65	46	31	-37.3	-11.3	-57.2	-65.6	-35.4	-22.9	-6.6	-31.7	22	-22.7
Percentage of ProfitLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	37.5	31.5	29.8	22.3	5.7	5.6	-9.7	0.2	2.7	4.5	2.8	16.8	20.1	13.2	-9.5	-4.1	0.1	-3.2	-4.3	7.5	16.5	12.1	10.1	6.7	-8.7	-3.1	-18.3	-18.7	-9.8	-6.9	-2.1	-9.8	5.0	-7.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-31.0	-32.0	-24.0	-13.0	12	-24.0	-47.0	-40.0	-45.0	-4.5	-65.5	-62.9	-67.2	-42.6	-89.3	-34.8	-48.5	-26.0	458	-120.9	-25.3	-26.2	-45.1	-32.3	-24.0	-14.5	-22.4	-0.7	-16.3	-24.1	-29.4	88	-71.1	-4.9	20	-0.5	-2.8	4.2	-11.2	13	1.7	3.9	4.0	-5.9	125	-3.7
Percentage of NetCashProvidedByUsedInInvestingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-2.3	-3.1	-2.8	-1.6	2.2	-4.1	-8.8	-6.6	-7.7	-0.8	-11.1	-8.5	-8.3	-6.2	-12.6	-4.8	-7.0	-4.3	83.4	-20.3	-4.3	-5.2	-9.7	-6.9	-4.9	-3.1	-4.9	-0.1	-3.1	-5.4	-6.1	17.3	-12.4	-0.9	4.6	-0.1	-0.7	1.2	-3.6	3.8	0.5	1.2	1.3	-1.8	28.1	-1.2

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	32	34	24	14	15	24	45	37	38	43	63	62	44	43	67	35	19	26	46	27	24	26	46	33	18	14	25	12	18	24	32	17	12	13	15	9.3	4.2	2.6	8.0	5.4	5.6	2.4	3.0	6.1	3.5	1.9
Percentage of PaymentsToAcquirePropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2010-09-30	2010-06-30
Value	-484.0	-158.0	-188.0	-45.0	-368.0	329	-176.0	-60.0	-22.0	-459.0	-133.7	-101.9	-59.9	-21.5	-1.2	-1.7	-1.0	-5.5	-460.3	69	-14.2	-1.9	2.8	-0.9	-2.6	-3.7	-0.2	-1.1	-0.1	-2.5	-1.2	-109.6	-2.9	-12.7	-10.5	0.6	102	0.0	-0.5	5.4	-20.6	-0.2	-60.3	-113.8
Percentage of NetCashProvidedByUsedInFinancingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-36.5	-15.5	-21.9	-5.7	-67.2	56.2	-32.8	-10.0	-3.7	-78.9	-22.7	-13.8	-7.4	-3.1	-0.2	-0.2	-0.1	-0.9	-83.7	11.6	-2.4	-0.4	0.6	-0.2	-0.5	-0.8	-0.0	-0.2	-0.0	-0.6	-0.3	-21.6	-0.5	-2.4	-2.3	0.1	23.8	0.0	-0.2	1.5	-5.7	-0.1	-18.7	-25.4

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-06-30	2019-03-31	2017-12-31	2017-09-30	2016-12-31	2016-09-30	2015-12-31	2015-09-30	2013-12-31	2013-09-30	2013-06-30	2012-12-31	2012-09-30	2012-06-30	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2010-09-30
Value	0.0	350	0.0	0.0	350	0.0	0.0	0.0	0.0	0.0	350	0.0	0.0	0.0	0.0	0.0	0.2	0.0	350	0.0	10.0	0.0	0.0	0.0
Percentage of ProceedsFromIssuanceOfLongTermDebt	0.0	100.0	0.0	0.0	100.0	0.0	0.0	0.0	0.0	0.0	100.0	0.0	0.0	0.0	0.0	0.0	100.0	0.0	100.0	0.0	100.0	0.0	0.0	0.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2019-12-31	2019-09-30	2019-06-30	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2010-09-30	2010-06-30
Value	0.0	359	0.0	0.0	350	2.0	0.0	3.0	2.3	22	0.2	0.1	0.1	1.2	0.1	1.2	459	274	6.8	1.1	0.1	0.8	0.0	1.4	0.1	1.1	0.0	1.1	0.1	109	2.6	1.0	10	0.2	-242.1	0.0	0.0	0.1	0.1	-0.4	60	113
Percentage of RepaymentsOfLongTermDebt	0.0	100.0	0.0	0.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31
Value	16	17	16	17	16	16	17	16	18	18	18	18	0.0	0.0	0.0	0.0
Percentage of PaymentsOfDividends	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0

us-gaap:PaymentsOfDividends us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	16	17	16	17	16	16	17	16	18	19	19	18
Percentage of PaymentsOfDividends	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	102.7	101.6	100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

Period End	2021-08-04	2021-06-30	2021-05-05	2021-03-31	2020-12-31	2020-11-04	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	151	465	146	122	171	71	29	0.0	0.0	158	42	0.0	438	113	59	38	0.0	0.0	0.0	0.0
Percentage of PaymentsForRepurchaseOfCommonStock	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0

us-gaap:PaymentsForRepurchaseOfCommonStock us-gaap:StatementEquityComponents

us-gaap:CommonStock

Period End	2021-06-30	2021-03-31
Value	-7.0	-2.0
Percentage of PaymentsForRepurchaseOfCommonStock	-1.5	-1.6

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31
Value	-458.0	-120.0
Percentage of PaymentsForRepurchaseOfCommonStock	-98.5	-98.4

Debt Instrument Interest Rate Stated Percentage

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

us-gaap:DebtInstrumentInterestRateStatedPercentage

lpx:SeniorUnsecuredNotesMaturing2029, us-gaap:SeniorNotes

Period End	2021-03-31
Value	3.625
Percentage of DebtInstrumentInterestRateStatedPercentage	100.0
Percentage of LongTermDebtAndCapitalLeaseObligations	0.0
Percentage of LongTermDebtAndCapitalLeaseObligations lpx:SeniorUnsecuredNotesMaturing2029 us-gaap:SeniorNotes	0.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	0	23.0	-3.0	27.0	0.37	0.22	0.34	0.04	0.16	0.21	-0.01	0	0	0.24	-0.04	0.01	0.07	-0.16	-0.22	-0.28	-0.02	0.11	0.21	0.26	-0.02	0.2	0.23	0.09	-0.43	0.26	0.2	0.23	-0.72	0.35	0.35
Percentage of EffectiveIncomeTaxRateContinuingOperations	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

lpx:SSARs

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	387540.0	640520.0	1141700.0	2404800.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	100.0	100.0	100.0	100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

lpx:SSARs

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	15.56	15.56	15.5	14.76
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	100.0	100.0	100.0	100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	75	72	58	30	23	94	93	137	76	85	135
Percentage of DeferredTaxLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

Period End	2020-12-31	2019-12-31
Value	55	71
Percentage of DeferredTaxAssetsNet	100.0	100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31
Value	11	38	40	40	39	4.1	42	48	49	23	11	13	14
Percentage of UnrecognizedTaxBenefits	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	10.0	11	12	13	37	56	32	23	50
Percentage of DeferredTaxAssetsValuationAllowance	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

lpx:AdjustedEBITDA

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	684	461	97	83
Percentage of AdjustedEBITDA	100.0	100.0	100.0	100.0

lpx:AdjustedEBITDA us-gaap:StatementBusinessSegments

lpx:CorporateUnallocated

Period End	2021-06-30	2020-06-30
Value	-7.0	-9.0
Percentage of AdjustedEBITDA	-1.0	-9.3

lpx:EWP

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	18	7.0	3.0	9.0
Percentage of AdjustedEBITDA	2.6	1.5	3.1	10.8

lpx:LPSouthAmerica

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	34	21	11	7.0
Percentage of AdjustedEBITDA	5.0	4.6	11.3	8.4

lpx:Osb

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	565	354	46	35
Percentage of AdjustedEBITDA	82.6	76.8	47.4	42.2

lpx:Siding

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	77	90	51	42
Percentage of AdjustedEBITDA	11.3	19.5	52.6	50.6

us-gaap:AllOtherSegments

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	-4.0	-5.0	-5.0	-3.0
Percentage of AdjustedEBITDA	-0.6	-1.1	-5.2	-3.6

us-gaap:Corporate

Period End	2021-03-31	2020-03-31
Value	-6.0	-7.0
Percentage of AdjustedEBITDA	-1.3	-8.4

lpx:Assetimpairmentattributabletoparent

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30
Value	1.0	7.0	7.0	5.0	0.0
Percentage of Assetimpairmentattributabletoparent	100.0	100.0	100.0	100.0	0.0

lpx:Canadianwagesubsidies

Period End	2020-09-30	2020-06-30
Value	5000000.0	4000000.0
Percentage of Canadianwagesubsidies	100.0	100.0

lpx:CommonstockSharesacquired

Period End	2020-11-04
Value	2.3
Percentage of CommonstockSharesacquired	100.0

lpx:CommonstockSharesacquired us-gaap:StatementEquityComponents

us-gaap:CommonStock

Period End	2020-09-30	2019-09-30	2019-03-31
Value	-1.0	-6.0	-12.0
Percentage of CommonstockSharesacquired	0.0	0.0	0.0

lpx:CommonstockValueSharesacquired us-gaap:StatementEquityComponents

lpx:CommonstockValueSharesacquired

us-gaap:CommonStock

Period End	2020-09-30	2019-09-30	2019-03-31
Value	-1.0	-6.0	-12.0
Percentage of CommonstockValueSharesacquired	100.0	100.0	100.0

us-gaap:RetainedEarnings

Period End	2020-09-30	2019-09-30	2019-03-31
Value	-28.0	-116.0	-308.0
Percentage of CommonstockValueSharesacquired	2800.0	1933.3	2566.7

lpx:DisposalGroupIncludingDiscontinuedOperationTotalConsideration

Period End	2020-09-30
Value	17
Percentage of DisposalGroupIncludingDiscontinuedOperationTotalConsideration	100.0

lpx:EstimatedAnnualTaxRate

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	24.0	25.0	26.0	26.0
Percentage of EstimatedAnnualTaxRate	100.0	100.0	100.0	100.0

lpx:Interestpaidnetofcashreceived

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	-1.0	7.0	2.0	10.0	-23.0	5.0	-0.0	5.0	-8.0	4.0	-5.0
Percentage of Interestpaidnetofcashreceived	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0

lpx:Netlossattributabletononcontrollinginterestexclusiveofimpairment

Period End	2021-06-30	2021-03-31
Value	0	-1000000.0
Percentage of Netlossattributabletononcontrollinginterestexclusiveofimpairment	0.0	100.0

lpx:OtherNonoperatingIncomeExpenseNetOfDebtExtinguishment

Period End	2021-06-30	2021-03-31	2020-06-30
Value	-6000000.0	1000000.0	-1000000.0
Percentage of OtherNonoperatingIncomeExpenseNetOfDebtExtinguishment	100.0	100.0	100.0

lpx:OtherOperatingIncomeOther

Period End	2021-06-30	2020-06-30
Value	1000000.0	2000000.0
Percentage of OtherOperatingIncomeOther	100.0	100.0

lpx:Otheroperatingincomeexpenseexclusiveofproductdiscontinuancecharges

Period End	2021-06-30	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30
Value	-3000000.0	-2000000.0	4000000.0	-2000000.0	-3000000.0	3000000.0
Percentage of Otheroperatingincomeexpenseexclusiveofproductdiscontinuancecharges	100.0	100.0	100.0	100.0	100.0	100.0

lpx:Paymentofdividends

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30
Value	16	17	16	17	16	16	17	17	19	19
Percentage of Paymentofdividends	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

lpx:Productlinediscontinuancecharges

Period End	2020-09-30	2020-06-30	2019-06-30
Value	-1000000.0	10000000.0	0
Percentage of Productlinediscontinuancecharges	100.0	100.0	0.0

lpx:ShareRepurchaseProgramOpenMarket

Period End	2020-11-04
Value	300
Percentage of ShareRepurchaseProgramOpenMarket	100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	1000000.0	0	0	0	1000000.0	0	-1000000.0	0	-200000.0	0	0
Percentage of AmortizationOfFinancingCostsAndDiscounts	100.0	0.0	0.0	0.0	100.0	0.0	100.0	0.0	100.0	0.0	0.0

us-gaap:AssetImpairmentCharges

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	0.0	1.0	8.0	7.0	86	5.0	0.0	1.0
Percentage of AssetImpairmentCharges	0.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0

us-gaap:AssetImpairmentCharges lpx:Producttype

lpx:Fiberproduction

Period End	2020-09-30	2020-06-30	2020-03-31
Value	-1.0	9.0	5.0
Percentage of AssetImpairmentCharges	-100.0	112.5	71.4

us-gaap:CapitalExpendituresIncurredButNotYetPaid

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	26	14	4.0	11	7.0	10.0	15	21
Percentage of CapitalExpendituresIncurredButNotYetPaid	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	-1000000.0	-1000000.0	-2000000.0	-1000000.0	-1000000.0	-1000000.0	-1000000.0	-1000000.0	-1000000.0	-1200000.0	-1600000.0	-1500000.0	-1500000.0	-1600000.0	-2000000.0	-1400000.0	-1400000.0	-1400000.0	-1300000.0	-1400000.0	-1400000.0	-1400000.0	-1600000.0	-1700000.0	-1800000.0	-1800000.0	-1300000.0	-1400000.0	-1400000.0	-1400000.0	-1800000.0	-1800000.0	-1900000.0	-1800000.0	-1600000.0	-1700000.0	-1700000.0	-1700000.0	-1300000.0	-1100000.0	-1100000.0	-1100000.0	1300000.0	-1200000.0	-1200000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	0	1000000.0	0	0	1000000.0	0	0	0	200000.0	100000.0	100000.0	100000.0	-100000.0	200000.0	200000.0	200000.0	200000.0	100000.0	100000.0	100000.0	200000.0	100000.0	100000.0	100000.0	0	0	0	0	100000.0	100000.0	0	100000.0	100000.0	100000.0	100000.0	100000.0	0	100000.0	100000.0	100000.0	0	100000.0	100000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	0.0	100.0	0.0	0.0	100.0	0.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	0.0	100.0	100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	3.0	3.0	3.0	4.0	4.0	4.0	3.0	4.0	4.0	3.6	3.8	3.3	3.3	3.4	3.3	3.3	3.3	3.3	3.1	3.3	3.3	3.3	3.6	3.8	3.8	3.8	4.2	4.2	4.2	4.2	4.1	4.1	4.1	4.1	4.1	4.3	4.3	4.3	4.7	4.5	4.5	4.5	2.8	4.8	4.7
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DefinedBenefitPlanInterestCost

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	2.0	2.0	2.0	2.0	3.0	3.0	3.0	3.0	3.0	3.0	2.5	2.9	2.9	2.9	2.8	3.3	3.3	3.2	3.0	3.3	3.3	3.3	2.9	3.4	3.4	3.4	3.1	3.7	3.6	3.7	3.0	3.2	3.3	3.2	3.6	3.7	3.7	3.7	3.9	4.0	4.0	4.0	2.6	4.2	4.4
Percentage of DefinedBenefitPlanInterestCost	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	1.0	1.0	0.0	0.0	1.0	1.0	1.0	2.0	2.0	2.0	-0.2	2.4	2.3	2.3	2.2	3.0	3.0	2.9	2.1	2.7	2.7	2.7	1.8	2.4	2.5	2.5	0.9	1.8	1.7	1.8	1.7	1.8	1.9	1.8	2.2	2.1	2.1	2.1	1.0	1.5	1.5	1.5	-1.2	1.5	1.7
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost	100.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DefinedBenefitPlanServiceCost

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	0	0	1000000.0	1000000.0	0	1000000.0	1000000.0	900000.0	-800000.0	1200000.0	1100000.0	1100000.0	800000.0	1400000.0	1400000.0	1400000.0	700000.0	1200000.0	1200000.0	1200000.0	700000.0	1000000.0	1000000.0	1000000.0	700000.0	900000.0	900000.0	900000.0	900000.0	800000.0	800000.0	800000.0	1000000.0	900000.0	900000.0	900000.0	500000.0	800000.0	800000.0	800000.0	300000.0	800000.0	700000.0
Percentage of DefinedBenefitPlanServiceCost	0.0	0.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

us-gaap:DisposalGroupNotDiscontinuedOperations, lpx:EastRiverFacilityAndCanExel

Period End	2020-09-30	2020-06-30	2019-09-30	2019-06-30
Value	0.0	3.0	14	7.0
Percentage of DisposalGroupIncludingDiscontinuedOperationRevenue	0.0	100.0	100.0	100.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	2000000.0	-2000000.0	6000000.0	1000000.0	-2000000.0	-3000000.0	-1000000.0	-2000000.0	1000000.0	200000.0	-300000.0	-600000.0	-5100000.0	1200000.0	1100000.0	1800000.0	-800000.0	900000.0	-800000.0	300000.0	1000000.0	2500000.0	-1200000.0	-1300000.0	-2200000.0	-2200000.0	-2000000.0	-500000.0	4200000.0	-5500000.0	-1800000.0	1200000.0	-2600000.0	400000.0	-3000000.0	-2500000.0	300000.0	700000.0	-2000000.0	2300000.0	2300000.0	-3600000.0	600000.0	1800000.0	-100000.0	-900000.0
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:EnvironmentalRemediationExpense

Period End	2020-09-30
Value	-2000000.0
Percentage of EnvironmentalRemediationExpense	100.0

us-gaap:ForeignCurrencyTransactionGainLossRealized

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	-6000000.0	1000000.0	-4000000.0	0	-1000000.0	6000000.0	-1000000.0	0	-1000000.0	-2000000.0	1000000.0	-1000000.0	1000000.0
Percentage of ForeignCurrencyTransactionGainLossRealized	100.0	100.0	100.0	0.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0

us-gaap:GainLossOnSalesOfAssetsAndAssetImpairmentCharges

Period End	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	1.0	28	28	28	-86.0	-5.0	29	31	-10.8	-0.0
Percentage of GainLossOnSalesOfAssetsAndAssetImpairmentCharges	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0

us-gaap:GoodwillImpairmentLoss

Period End	2020-12-31
Value	0
Percentage of GoodwillImpairmentLoss	0.0

us-gaap:IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions

Period End	2021-06-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2016-06-30	2016-03-31	2015-09-30	2015-06-30
Value	1000000.0	0	1900000.0	-1300000.0	300000.0	800000.0	200000.0	400000.0	600000.0	0	-200000.0	-500000.0	2000000.0	-1400000.0
Percentage of IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	39	-3.0	17	35	-6.0	-16.0	25	-11.0	-2.0	-15.4	-3.1	1.9	18	-38.0	9.7	18	14	-19.9	0.5	17	10	26	-30.7	14	-21.4	17	-25.9	24	-38.4	32	-13.6	17	-3.2	12	-14.9	7.2	9.7	9.7	-6.7	3.6	-4.0	1.7	1.2	-12.6	7.6	1.0
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInIncomeTaxes

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30
Value	-56.0	71	16	10.0	16	1.0	4.0	-9.0	10.0
Percentage of IncreaseDecreaseInIncomeTaxes	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30
Value	9000000.0	-3000000.0	2000000.0	4000000.0	1000000.0	3000000.0	3000000.0	0	-1000000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0

us-gaap:IncreaseDecreaseInReceivables

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	50	74	-22.0	48	-4.0	31	-25.0	6.0	6.0	34	-29.6	-19.2	16	29	-26.9	17	5.1	39	-28.1	-14.1	3.3	47	-26.6	-0.6	-14.3	30	-33.3	0.2	2.8	64	-30.3	7.9	-34.5	52	-23.2	3.3	-5.7	40	-21.5	-2.5	-5.8	30	-18.6	-31.2	14	36
Percentage of IncreaseDecreaseInReceivables	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	1000000.0	1000000.0	0	1000000.0	1000000.0	1000000.0	-900000.0	800000.0	900000.0	1000000.0	-300000.0	1400000.0	1600000.0	2000000.0	100000.0	2000000.0	1700000.0	1700000.0	0	1500000.0	1600000.0	2000000.0	0	0	0	0	1900000.0	0	0	2200000.0	2300000.0	3000000.0	2300000.0	2500000.0	0	0	0	0	0	0	0	0	1800000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.0

us-gaap:InterestExpenseDebtExcludingAmortization

Period End	2021-06-30	2020-09-30	2020-06-30	2019-09-30	2019-06-30
Value	3.0	5.0	6.0	5.0	5.0
Percentage of InterestExpenseDebtExcludingAmortization	100.0	100.0	100.0	100.0	100.0

us-gaap:InterestIncomeMoneyMarketDeposits

Period End	2020-09-30	2020-06-30	2019-09-30	2019-06-30
Value	0	1000000.0	2000000.0	2000000.0
Percentage of InterestIncomeMoneyMarketDeposits	0.0	100.0	100.0	100.0

us-gaap:InterestIncomeOther

Period End	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30
Value	0	0	-1000000.0	0	0	1000000.0	0	0
Percentage of InterestIncomeOther	0.0	0.0	100.0	0.0	0.0	100.0	0.0	0.0

us-gaap:InvestmentIncomeNonoperating

Period End	2020-12-31	2020-09-30	2020-06-30	2019-12-31	2019-09-30	2019-06-30
Value	1.0	0.0	4.0	1.0	2.0	2.0
Percentage of InvestmentIncomeNonoperating	100.0	0.0	100.0	100.0	100.0	100.0

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:VariableRate

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod

srt:Maximum, lpx:AmendedCreditFacilityALoan, us-gaap:RevolvingCreditFacility, us-gaap:BaseRate

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30
Value	1.5	2.0	2.0	0.02
Percentage of LineOfCreditFacilityInterestRateDuringPeriod	100.0	100.0	100.0	100.0

srt:Maximum, lpx:AmendedCreditFacilityBLoan, us-gaap:RevolvingCreditFacility, us-gaap:BaseRate

Period End	2021-03-31	2020-09-30	2020-06-30
Value	2.25	2.25	0.0225
Percentage of LineOfCreditFacilityInterestRateDuringPeriod	112.5	112.5	112.5

srt:Maximum, lpx:AmendedCreditFacilityBLoan, us-gaap:RevolvingCreditFacility, us-gaap:LondonInterbankOfferedRateLIBOR

Period End	2021-03-31	2020-09-30	2020-06-30
Value	3.25	3.25	0.0325
Percentage of LineOfCreditFacilityInterestRateDuringPeriod	162.5	162.5	162.5

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage us-gaap:Range, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage

srt:Maximum, us-gaap:RevolvingCreditFacility

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30
Value	0.425	0.6	0.6	0.006
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage	100.0	100.0	100.0	100.0

srt:Minimum, us-gaap:RevolvingCreditFacility

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30
Value	0.2	0.3	0.3	0.003
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage	47.1	50.0	50.0	50.0

us-gaap:MarketableSecuritiesGainLoss

Period End	2020-09-30	2020-06-30	2019-06-30
Value	0	3000000.0	0
Percentage of MarketableSecuritiesGainLoss	0.0	100.0	0.0

us-gaap:NetIncomeLossAttributableToRedeemableNoncontrollingInterest

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	0	-1000000.0	1000000.0	0	-2000000.0	0	-2000000.0	-1000000.0	-2000000.0	-400000.0	0	0	0	0
Percentage of NetIncomeLossAttributableToRedeemableNoncontrollingInterest	0.0	100.0	100.0	0.0	100.0	0.0	100.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	0	0	0	1000000.0	1000000.0	1000000.0	1000000.0	1000000.0	0	1000000.0	1000000.0
Percentage of NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	0.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0

us-gaap:NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1

Period End	2020-09-30
Value	2000000.0
Percentage of NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1	100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30
Value	1.0	0.0	-3.0	0.0	1.0	0.0	-0.0	-0.4	-0.2	0.2	-0.1	0.2	0.0	0.4	0.1	0.3	0.1	-0.5	-0.2	0.0	0.8	-0.1	0.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	100.0	0.0	100.0	0.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	0.0

us-gaap:AccumulatedTranslationAdjustment

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30
Value	7.0	-7.0	16	4.0	2.0	-23.0	-3.0	-10.0	1.0	1.6	-3.8	-2.0	-13.8	2.3	1.9	10	-8.5	2.8	-1.5	0.1	4.1	6.1	-1.5	-12.0	-0.1
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	0.0	0.0	1600.0	0.0	-66.7	0.0	-300.0	0.0	0.0	-400.0	1900.0	-1000.0	13800.0	1150.0	0.0	2600.0	-8500.0	933.3	-1500.0	-20.0	-2050.0	0.0	-187.5	12000.0	0.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30
Value	8.0	-6.0	5.0	0.0	-22.0	-9.0	2.0	2.0	1.6	-0.7	-12.4	3.9	7.3	11	-7.6	4.0	-2.7	0.6	4.8	6.2	0.2	-9.8	0.9
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss

Period End	2020-09-30	2020-06-30	2019-06-30
Value	0	-3000000.0	0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0.0	100.0	0.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2016-06-30
Value	7.0	3.0	7.0	15	-5.0	17	-1.0	0.0	-0.1	-1.2	0.1	-0.2	-0.6	0.3	-0.6	-0.4
Percentage of OtherOperatingActivitiesCashFlowStatement	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherOperatingIncomeExpenseNet

Period End	2021-06-30	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	3.0	1.0	3.0	-6.0	-2.0	1.0	-3.0	3.0	-1.9	-9.0	6.3	4.5	0.4	-3.5	0.9	-2.0	-3.4	-6.0	0.0	-11.4	0.0	-3.7	-1.0	0.0	-11.6	-6.4	-0.5	-0.6	0.0	-12.9	16	-5.4	-1.6	4.1	-1.2	-0.2	0.2	0.0	9.8	0.6	0.8	2.7	-2.3	-0.6
Percentage of OtherOperatingIncomeExpenseNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	0.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherSellingGeneralAndAdministrativeExpense

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2016-06-30	2016-03-31	2015-09-30	2015-06-30	2015-03-31	2014-09-30	2014-06-30	2014-03-31
Value	4.0	1.0	5.0	1.0	2.0	6.0	-8.0	8.3	27	27	27	30	27	28	26	-27.2	24	-20.5	-22.0	-22.7	-18.5	-20.7	-27.3
Percentage of OtherSellingGeneralAndAdministrativeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2011-06-30	2010-06-30
Value	-1000000.0	-2000000.0	0	0	-3000000.0	0	0	1000000.0	0	1000000.0	1800000.0	100000.0	100000.0	200000.0	500000.0	-100000.0	100000.0	-100000.0	200000.0	100000.0	300000.0	-100000.0	300000.0	-100000.0	0	0	400000.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities	100.0	100.0	0.0	0.0	100.0	0.0	0.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	100.0

us-gaap:ProceedsFromDivestitureOfBusinesses

Period End	2020-12-31	2020-09-30	2020-06-30	2019-09-30	2019-06-30
Value	0.0	1.0	14	0.0	0.0
Percentage of ProceedsFromDivestitureOfBusinesses	0.0	100.0	100.0	0.0	0.0

us-gaap:ProceedsFromInsuranceSettlementOperatingActivities

Period End	2021-06-30
Value	2000000.0
Percentage of ProceedsFromInsuranceSettlementOperatingActivities	100.0

us-gaap:ProceedsFromLifeInsurancePolicies

Period End	2020-09-30	2020-06-30	2019-06-30
Value	0	10000000.0	0
Percentage of ProceedsFromLifeInsurancePolicies	0.0	100.0	0.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-03-31	2015-12-31	2015-09-30	2015-03-31	2014-12-31	2014-09-30
Value	-2000000.0	-10000000.0	-1000000.0	0	-1000000.0	-5000000.0	-1000000.0	-2000000.0	-3000000.0	0	100000.0	0	0	3100000.0	0	0	0	0	100000.0	3200000.0	100000.0	0	-100000.0	0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	0.0	0.0	100.0	0.0	0.0	0.0	0.0	100.0	100.0	100.0	0.0	100.0	0.0

us-gaap:ProductWarrantyAccrualPayments

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	1.0	0.0	0.0	1.0	1.0	1.0	0.0	0.9	5.9	0.8	1.0	1.1	1.9	1.6	2.6	3.4	2.9	4.8	3.6	3.6	3.1	2.9	2.6	3.1	3.2	3.0	2.5	2.9	3.9	3.8	2.5	2.3	2.8	4.5	1.6	2.7	3.9	5.2	1.5	2.3	4.9	4.0	3.3
Percentage of ProductWarrantyAccrualPayments	100.0	0.0	0.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProductWarrantyAccrualWarrantiesIssued

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	1.0	0.0	0.0	1.0	0.0	0.0	1.0	0.0	0.2	0.2	0.4	0.2	0.4	0.2	0.2	0.2	0.2	0.2	0.3	0.1	-2.2	2.6	0.2	0.1	0.1	3.2	0.1	0.2	11	0.4	0.0	0.3	2.6	1.4	0.2	0.3	-1.0	9.8	3.8	1.1	6.9	0.9	2.0
Percentage of ProductWarrantyAccrualWarrantiesIssued	100.0	0.0	0.0	100.0	0.0	0.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:AccumulatedDefinedBenefitPlansAdjustment

Period End	2021-06-30	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	1000000.0	-8000000.0	1000000.0	1000000.0	1000000.0	-7000000.0	1000000.0	1000000.0	1000000.0	-10000000.0	1000000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:SeveranceCosts1

Period End	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30
Value	-2.0	10.0	-1.0	-2.0	10.0	-2.0	1.0	2.0	5.6	0.9	-3.8	-4.0	0.0	0.0
Percentage of SeveranceCosts1	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross

us-gaap:PerformanceShares

Period End	2021-03-31
Value	121750.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	100.0

us-gaap:RestrictedStockUnitsRSU

Period End	2021-03-31
Value	200060.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	164.3

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

Period End	2021-03-31
Value	43.39
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	100.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

Period End	2021-03-31	2020-03-31	2019-03-31
Value	6000000.0	-4000000.0	4000000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation	100.0	100.0	100.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:TreasuryStock

Period End	2021-03-31	2020-03-31	2019-06-30	2019-03-31	2018-06-30	2018-03-31
Value	6000000.0	-4000000.0	0	100000.0	0	300000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation	100.0	100.0	0.0	2.5	0.0	0.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

Period End	2021-06-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	1.0	1.0	0.0	1.0	1.0	4.0	2.0	2.0	6.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	1.0	11	1.0	1.0	8.0	3.0	1.0	8.0	3.0	8.0	10.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation	100.0	0.0	0.0	100.0	0.0	300.0	100.0	200.0	150.0	400.0	166.7

us-gaap:TreasuryStock

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	2.0	11	1.0	2.0	8.0	2.0	2.0	4.0	2.0	6.0	4.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation	200.0	0.0	0.0	200.0	0.0	200.0	200.0	100.0	100.0	300.0	66.7

us-gaap:TemporaryEquityAccretionToRedemptionValueAdjustment

Period End	2020-09-30	2020-06-30
Value	0	2000000.0
Percentage of TemporaryEquityAccretionToRedemptionValueAdjustment	0.0	100.0

us-gaap:TreasuryStockSharesRetired

Period End	2021-06-30	2021-03-31
Value	7000000.0	2000000.0
Percentage of TreasuryStockSharesRetired	100.0	100.0

us-gaap:TreasuryStockSharesRetired us-gaap:StatementEquityComponents

us-gaap:CommonStock

Period End	2021-08-04	2021-05-05
Value	2700000.0	2300000.0
Percentage of TreasuryStockSharesRetired	0.0	0.0

us-gaap:TreasuryStockValueAcquiredCostMethod

Period End	2020-09-30	2019-09-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	29	42	438	113	59	39
Percentage of TreasuryStockValueAcquiredCostMethod	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:WriteOffOfDeferredDebtIssuanceCost

Period End	2021-06-30	2021-03-31	2013-09-30	2012-09-30
Value	2000000.0	2000000.0	500000.0	4500000.0
Percentage of WriteOffOfDeferredDebtIssuanceCost	100.0	100.0	100.0	100.0

dei:EntityCommonStockSharesOutstanding

Period End	2021-07-30	2021-04-30	2020-10-30
Value	95	102	109
Percentage of EntityCommonStockSharesOutstanding	100.0	100.0	100.0

lpx:DefinedBenefitPlanSignificantPlansApproximatePercentageOfBeneiftObligationAccountedFor

Period End	2020-12-31
Value	82.0
Percentage of DefinedBenefitPlanSignificantPlansApproximatePercentageOfBeneiftObligationAccountedFor	100.0

lpx:DefinedBenefitPlanSignificantPlansApproximatePercentageOfPlanAssetsAccountedFor

Period End	2020-12-31
Value	79.0
Percentage of DefinedBenefitPlanSignificantPlansApproximatePercentageOfPlanAssetsAccountedFor	100.0

lpx:Disposalgroupcarryingvalue us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

lpx:Disposalgroupcarryingvalue

us-gaap:DisposalGroupNotDiscontinuedOperations, lpx:EastRiverFacilityAndCanExel

Period End	2020-09-30
Value	-14000000.0
Percentage of Disposalgroupcarryingvalue	100.0

lpx:Goodwillanddevelopedtechnologynet

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	46	50	26	26	9.7
Percentage of Goodwillanddevelopedtechnologynet	100.0	100.0	100.0	100.0	100.0

lpx:LeaseLiabilityPaymentsDue

Period End	2020-12-31
Value	52
Percentage of LeaseLiabilityPaymentsDue	100.0

lpx:LeaseLiabilityPaymentsDueAfterYearFive

Period End	2020-12-31
Value	27
Percentage of LeaseLiabilityPaymentsDueAfterYearFive	100.0

lpx:LeaseLiabilityPaymentsDueNextTwelveMonths

Period End	2020-12-31
Value	9000000.0
Percentage of LeaseLiabilityPaymentsDueNextTwelveMonths	100.0

lpx:LeaseLiabilityPaymentsDueYearFive

Period End	2020-12-31
Value	2000000.0
Percentage of LeaseLiabilityPaymentsDueYearFive	100.0

lpx:LeaseLiabilityPaymentsDueYearFour

Period End	2020-12-31
Value	3000000.0
Percentage of LeaseLiabilityPaymentsDueYearFour	100.0

lpx:LeaseLiabilityPaymentsDueYearThree

Period End	2020-12-31
Value	4000000.0
Percentage of LeaseLiabilityPaymentsDueYearThree	100.0

lpx:LeaseLiabilityPaymentsDueYearTwo

Period End	2020-12-31
Value	7000000.0
Percentage of LeaseLiabilityPaymentsDueYearTwo	100.0

lpx:Leaseliabilityundiscountedexcessamount

Period End	2020-12-31
Value	12
Percentage of Leaseliabilityundiscountedexcessamount	100.0

lpx:Logs

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2014-12-31
Value	53	73	49	39	44	66	47	41	47	77	56	50	57	88	60	46	44	76	54	46	45	72	58	39
Percentage of Logs	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

lpx:LongtermdebtGrossNoncurrent

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	351	351	350	355
Percentage of LongtermdebtGrossNoncurrent	100.0	100.0	100.0	100.0

lpx:Otherlongtermliabilities

Period End	2020-12-31	2019-12-31	2018-12-31
Value	35	37	38
Percentage of Otherlongtermliabilities	100.0	100.0	100.0

lpx:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisableNumber us-gaap:AwardType

lpx:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisableNumber

lpx:SSARs

Period End	2020-12-31
Value	387540.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisableNumber	100.0

lpx:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityAwardsOtherthanOptionsVestedandExpectedtoVestOutstandingNumber us-gaap:AwardType

lpx:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityAwardsOtherthanOptionsVestedandExpectedtoVestOutstandingNumber

us-gaap:RestrictedStockUnitsRSU

Period End	2020-12-31	2019-12-31	2018-12-31
Value	1228300.0	1048900.0	908780.0
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityAwardsOtherthanOptionsVestedandExpectedtoVestOutstandingNumber	100.0	100.0	100.0

lpx:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityAwardsOtherthanOptionsVestedandExpectedtoVestOutstandingWeightedAverageExercisePrice us-gaap:AwardType

lpx:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityAwardsOtherthanOptionsVestedandExpectedtoVestOutstandingWeightedAverageExercisePrice

us-gaap:RestrictedStockUnitsRSU

Period End	2020-12-31	2019-12-31	2018-12-31
Value	27.42	24.82	23.17
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityAwardsOtherthanOptionsVestedandExpectedtoVestOutstandingWeightedAverageExercisePrice	100.0	100.0	100.0

lpx:StockholdersEquityIncludingTemporaryEquity

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2009-12-31	2008-12-31
Value	1234	991	1700	1604	1195	1017	1023	1056	1075	1115	1191	1217	1211	1226	1223	1182	1092	1033	992	956	995	1000	1084	1171	1217	1253	1185
Percentage of StockholdersEquityIncludingTemporaryEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

lpx:StockholdersEquityIncludingTemporaryEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2009-12-31	2008-12-31
Value	-151.0	-153.0	-146.4	-122.1	-137.2	-146.1	-146.3	-136.5	-137.4	-131.3	-96.1	-88.0	-89.6	-89.2	-109.8	-110.8	-104.3	-107.9	-101.8	-105.4	-100.8	-106.2	-79.2	-56.5	-69.6	-64.6	-98.1
Percentage of StockholdersEquityIncludingTemporaryEquity	-12.2	-15.4	-8.6	-7.6	-11.5	-14.4	-14.3	-12.9	-12.8	-11.8	-8.1	-7.2	-7.4	-7.3	-9.0	-9.4	-9.5	-10.4	-10.3	-11.0	-10.1	-10.6	-7.3	-4.8	-5.7	-5.2	-8.3

us-gaap:AdditionalPaidInCapital

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2009-12-31	2008-12-31
Value	452	454	458	470	478	496	497	495	501	507	506	503	502	508	505	504	503	533	536	539	538	549	554	557	559	562	441
Percentage of StockholdersEquityIncludingTemporaryEquity	36.6	45.8	26.9	29.3	40.0	48.8	48.6	46.9	46.6	45.4	42.5	41.4	41.5	41.4	41.3	42.7	46.1	51.6	54.0	56.4	54.1	54.9	51.1	47.6	45.9	44.9	37.2

us-gaap:CommonStock

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2009-12-31	2008-12-31
Value	124	130	153	153	153	153	153	152	152	152	152	152	152	152	152	150	150	150	150	149	149	149	149	145	144	139	116
Percentage of StockholdersEquityIncludingTemporaryEquity	10.0	13.1	9.0	9.6	12.8	15.0	15.0	14.5	14.2	13.7	12.8	12.5	12.5	12.4	12.4	12.7	13.8	14.5	15.1	15.7	15.0	15.0	13.8	12.4	11.9	11.1	9.9

us-gaap:RetainedEarnings

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2009-12-31	2008-12-31
Value	1206	966	1612	1280	890	724	731	758	777	812	855	875	873	887	908	870	775	710	664	633	670	681	739	804	863	902	1023
Percentage of StockholdersEquityIncludingTemporaryEquity	97.7	97.5	94.8	79.8	74.5	71.2	71.5	71.8	72.3	72.8	71.8	71.9	72.1	72.4	74.2	73.6	71.0	68.7	66.9	66.2	67.3	68.1	68.1	68.7	70.9	72.0	86.3

lpx:TimberAndTimberLicenses

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	64	63	52	48	55	56	63	61	55	55	62	56	56	53	55	55	52	52	53	50	51	51	53	53	53	54	67	67	68	69	71	72	72	39	40	40	40	43	45	44	44	46
Percentage of TimberAndTimberLicenses	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

lpx:Totalleaseassets

Period End	2020-12-31	2019-12-31
Value	40	45
Percentage of Totalleaseassets	100.0	100.0

lpx:Totalleaseliabilities

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30
Value	40	45	42	24
Percentage of Totalleaseliabilities	100.0	100.0	100.0	100.0

lpx:Uncertaintaxposition

Period End	2020-12-31	2019-12-31	2018-12-31
Value	9.0	37	40
Percentage of Uncertaintaxposition	100.0	100.0	100.0

lpx:UnrecognizedStockCompensation

Period End	2021-03-31
Value	22
Percentage of UnrecognizedStockCompensation	100.0

lpx:Unrecognizedstockcompensation us-gaap:AwardType

lpx:Unrecognizedstockcompensation

us-gaap:RestrictedStockUnitsRSU

Period End	2020-12-31
Value	14
Percentage of Unrecognizedstockcompensation	100.0

us-gaap:AccountsPayableCurrentAndNoncurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	125	127	116
Percentage of AccountsPayableCurrentAndNoncurrent	100.0	100.0	100.0

us-gaap:AccountsReceivableGrossCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	281	226	161	183	134	135	111	140	139	131	86	124	148	132	124	157	141	137	96	127	134	129	82	110	113	126	96	130	135	135	69	102	98	129	76	93	93	97	55	75	83	56
Percentage of AccountsReceivableGrossCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AccruedExchangeFeeRebateCurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	44	34	30
Percentage of AccruedExchangeFeeRebateCurrent	100.0	100.0	100.0

us-gaap:AccruedSalariesCurrent

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	62	48	64	75	58	34	32	43	32	21	29
Percentage of AccruedSalariesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	1000000.0	800000.0	3000000.0	2000000.0	2100000.0	800000.0	800000.0	900000.0	900000.0	900000.0	1000000.0	1000000.0	1000000.0	1000000.0	1100000.0	1100000.0	1000000.0	1000000.0	1000000.0	1000000.0	1000000.0	1000000.0	1100000.0	1100000.0	1100000.0	1100000.0	1100000.0	1100000.0	1100000.0	1100000.0	1200000.0	1100000.0	1200000.0	1100000.0	1200000.0	1400000.0	1300000.0	1300000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AllowanceForDoubtfulOtherReceivablesCurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	2000000.0	1000000.0	1000000.0
Percentage of AllowanceForDoubtfulOtherReceivablesCurrent	100.0	100.0	100.0

us-gaap:AssetRetirementObligation

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31
Value	10.0	11	12	10	10	10.0	8.6	8.3	8.3	7.4	7.0	6.7
Percentage of AssetRetirementObligation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AssetRetirementObligationsNoncurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	10.0	11	12
Percentage of AssetRetirementObligationsNoncurrent	100.0	100.0	100.0

us-gaap:BuildingsAndImprovementsGross

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	356	350	329	347	328	324	321	330	280	265	280
Percentage of BuildingsAndImprovementsGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment

Period End	2020-12-31
Value	3000000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment	100.0

us-gaap:CommonStockValueOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStockValueOutstanding

us-gaap:CommonStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2011-03-31	2010-12-31
Value	114	121	124	129	130	130	130	135	141	141	153	153	153	153	153	144	144
Percentage of CommonStockValueOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DebtInstrumentCarryingAmount

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2016-09-30	2015-12-31
Value	351	351	355	380	382	838	757
Percentage of DebtInstrumentCarryingAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

us-gaap:OtherDebtSecurities

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2016-09-30	2015-12-31
Value	1.0	1.0	1.0	0.7	1.3	1.4	0.3
Percentage of DebtInstrumentCarryingAmount	0.3	0.3	0.3	0.2	0.3	0.2	0.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2016-09-30	2015-12-31
Value	-2000000.0	-3000000.0	-3800000.0	-4500000.0	-5300000.0	-6300000.0	-3900000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:DebtInstrument

lpx:Seniorunsecurednotesmaturing2024

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	-2000000.0	-3000000.0	-3700000.0	-4400000.0	-5000000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	100.0	100.0	97.4	97.8	94.3

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	2000000.0	2000000.0	1100000.0	1900000.0	1800000.0	2000000.0	2100000.0	1900000.0	1500000.0	2100000.0	2100000.0
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredFinanceCostsNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	4000000.0	4000000.0	2000000.0	3000000.0	3000000.0	3000000.0	3000000.0
Percentage of DeferredFinanceCostsNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredIncomeTaxAssetsNet

Period End	2020-12-31	2019-12-31
Value	3000000.0	1000000.0
Percentage of DeferredIncomeTaxAssetsNet	100.0	100.0

us-gaap:DeferredIncomeTaxLiabilities

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	130	143	121	134	183
Percentage of DeferredIncomeTaxLiabilities	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsDeferredIncome

Period End	2021-06-30	2021-03-31	2020-12-31
Value	4000000.0	2000000.0	3000000.0
Percentage of DeferredTaxAssetsDeferredIncome	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsInventory

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	7000000.0	7000000.0	7700000.0	6600000.0	6900000.0	7700000.0	-8100000.0	-8100000.0	-6900000.0	-12400000.0	-14000000.0
Percentage of DeferredTaxAssetsInventory	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	9.0	28	15	38	83	137	134	97	187	171	118
Percentage of DeferredTaxAssetsOperatingLossCarryforwards	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

Period End	2020-12-31
Value	4000000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsForeign	100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

Period End	2020-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	109	-17.8	-14.9	-13.2	-24.4	-30.2
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsOther

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	12	8.0	13	10	11	-3.9	-6.0	-1.4	-4.2	18
Percentage of DeferredTaxAssetsOther	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	5.0	7.0	8.3	19
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	4000000.0	5000000.0	5300000.0	6900000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	23	18	21	53	83	79	-84.9	-70.0	-78.9	-81.5	-67.4
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	9.0	10.0	9.8	11	11
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

Period End	2020-12-31	2019-12-31
Value	5000000.0	6000000.0
Percentage of DeferredTaxLiabilitiesLeasingArrangements	100.0	100.0

us-gaap:DeferredTaxLiabilitiesOther

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	7.0	6.0	0.0	5.2	11	-12.6	-3.9
Percentage of DeferredTaxLiabilitiesOther	100.0	100.0	0.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	109	121	111	118	164	165	172	178	148	160	175
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries

Period End	2020-12-31
Value	26
Percentage of DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries	100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax us-gaap:StatementEquityComponents

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax

us-gaap:AccumulatedDefinedBenefitPlansAdjustment

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	-109.0	-119.0	-123.8	-136.0	-149.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	100.0	100.0	100.0	100.0	100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	-8.0	-8.0	-7.4	-7.9	-8.4
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	7.3	6.7	6.0	5.8	5.6

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	-101.0	-111.0	-116.4	-128.1	-140.6
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	92.7	93.3	94.0	94.2	94.4

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	7000000.0	5000000.0	4500000.0	1400000.0	900000.0	500000.0	600000.0	600000.0	400000.0	1000000.0	800000.0
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

lpx:DefinedBenefitCanadianPlans

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	2.3	0.03	0.038	0.033
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	100.0	100.0	100.0	100.0

lpx:DefinedBenefitUSPlans

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	2.3	0.031	0.042	0.035
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	100.0	103.3	110.5	106.1

us-gaap:DefinedBenefitPlanBenefitObligation

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31
Value	319	312	296	345	331	330	364	322	352	339	316	290
Percentage of DefinedBenefitPlanBenefitObligation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanName

lpx:DefinedBenefitCanadianPlans

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	58	54	49	58
Percentage of DefinedBenefitPlanBenefitObligation	18.2	17.3	16.5	16.8

lpx:DefinedBenefitUSPlans

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	262	258	244	272
Percentage of DefinedBenefitPlanBenefitObligation	82.1	82.7	82.5	78.9

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

Period End	2020-12-31
Value	91
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

Period End	2020-12-31
Value	26
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

Period End	2020-12-31
Value	19
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

Period End	2020-12-31
Value	19
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

Period End	2020-12-31
Value	20
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

Period End	2020-12-31
Value	19
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31
Value	310	294	274	265	239	237	268	270	259	247	255	232
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories

lpx:EquityFundsDomesticStockFunds

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	56	54	22	56	51	50	84	83	54	78
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	18.1	18.4	8.1	21.1	21.4	21.4	31.5	30.7	21.1	31.7

lpx:EquityFundsInternationalStockFunds

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	46	40	13	43	38	34	37	42	39	46
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	14.8	13.6	4.8	16.2	16.0	14.3	14.1	15.7	15.3	18.8

lpx:FixedIncomeFundsDomesticEquities

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	94	93	27	40	36	32	62	54	52	26
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	30.3	31.6	9.9	15.1	15.3	13.5	23.3	20.1	20.1	10.7

lpx:FixedIncomeFundsInternationalBondFundMember

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	64	52	27	40	36	34	40	34	34	31
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	20.6	17.7	9.9	15.4	15.0	14.5	15.3	12.7	13.1	12.8

us-gaap:CashAndCashEquivalents

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	2.0	2.0	1.5	3.0	2.2	1.9	2.2	3.5	2.4	3.3	2.8
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	0.6	0.7	0.5	1.1	0.9	0.8	0.8	1.3	0.9	1.3	1.1

us-gaap:HedgeFundsMultistrategy

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	48	53	35	82	75	84	26	25	49	46	45
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	15.5	18.0	12.7	31.0	31.3	35.5	9.7	9.3	19.1	18.8	17.8

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel

lpx:EquityFundsDomesticStockFunds, us-gaap:FairValueInputsLevel1

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	56	54	22	42	38	39	71	68	25
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	18.1	18.4	8.1	15.9	15.8	16.4	26.6	25.5	9.6

lpx:EquityFundsInternationalStockFunds, us-gaap:FairValueInputsLevel1

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	46	40	13	15	13	11	12	14	12
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	14.8	13.6	4.8	5.8	5.6	4.9	4.8	5.3	4.7

lpx:FixedIncomeFundsDomesticEquities, us-gaap:FairValueInputsLevel1

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	17	15	27	20	36	32	62	54	52
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	5.5	5.1	9.9	7.6	15.3	13.5	23.3	20.1	20.1

lpx:FixedIncomeFundsDomesticEquities, us-gaap:FairValueMeasuredAtNetAssetValuePerShare

Period End	2020-12-31	2019-12-31	2018-12-31
Value	77	78	89
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	24.8	26.5	32.4

lpx:FixedIncomeFundsInternationalBondFundMember, us-gaap:FairValueInputsLevel2

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	26	20	27	40	36	34	40	34	34
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	8.4	6.8	9.9	15.4	15.0	14.5	15.3	12.7	13.1

lpx:FixedIncomeFundsInternationalBondFundMember, us-gaap:FairValueMeasuredAtNetAssetValuePerShare

Period End	2020-12-31	2019-12-31	2018-12-31
Value	38	32	20
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	12.3	10.9	7.3

us-gaap:CashAndCashEquivalents, us-gaap:FairValueInputsLevel2

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	2.0	2.0	1.5	3.0	2.2	1.9	2.2	3.5	2.4
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	0.6	0.7	0.5	1.1	0.9	0.8	0.8	1.3	0.9

us-gaap:HedgeFundsMultistrategy, us-gaap:FairValueInputsLevel1

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	48	47	35	69	62	70	0.0	0.0	0.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	15.5	16.0	12.7	26.2	26.2	29.9	0.0	0.0	0.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	167	156	101	147	151	153	160	148	101
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	53.9	53.1	36.9	55.5	63.0	64.7	59.9	55.0	39.0

us-gaap:FairValueInputsLevel2

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	28	22	160	105	76	70	81	79	93
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	9.0	7.5	58.4	39.7	31.9	29.7	30.3	29.6	36.1

us-gaap:FairValueMeasuredAtNetAssetValuePerShare

Period End	2020-12-31	2019-12-31	2018-12-31
Value	115	116	149
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	37.1	39.5	54.2

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanName

lpx:DefinedBenefitCanadianPlans

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	64	58	52	58
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	20.6	19.7	19.1	21.9

lpx:DefinedBenefitUSPlans

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	246	236	222	207
Percentage of DefinedBenefitPlanFairValueOfPlanAssets	79.4	80.3	80.9	78.1

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	-10000000.0	-18000000.0	-21900000.0	-79600000.0	-92000000.0	-93400000.0	-96100000.0	-51800000.0	-92700000.0	-92200000.0	-61000000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanName

lpx:DefinedBenefitCanadianPlans

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	6000000.0	4000000.0	3400000.0	100000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan	-60.0	-22.2	-15.5	-0.1

lpx:DefinedBenefitUSPlans

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	-16000000.0	-22000000.0	-22400000.0	-64900000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan	160.0	122.2	102.3	81.5

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	10000000.0	7000000.0	8600000.0	9000000.0	7800000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan	-100.0	-38.9	-39.3	-11.3	-8.5

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

us-gaap:CashAndCashEquivalents, lpx:CountriesOtherThanTheUnitedStates

Period End	2020-12-31	2019-12-31
Value	60.0	0.1
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	100.0	100.0

us-gaap:DebtSecurities, country:US

Period End	2020-12-31	2019-12-31
Value	50.0	0.4
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	83.3	400.0

us-gaap:DebtSecurities, lpx:CountriesOtherThanTheUnitedStates

Period End	2020-12-31	2019-12-31
Value	40.0	0.9
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	66.7	900.0

us-gaap:EquitySecurities, country:US

Period End	2020-12-31	2019-12-31
Value	33.0	0.4
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	55.0	400.0

us-gaap:HedgeFundsMultistrategy, country:US

Period End	2020-12-31	2019-12-31
Value	17.0	0.2
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	28.3	200.0

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage us-gaap:RetirementPlanSponsorLocation

country:US

Period End	2020-12-31	2019-12-31
Value	100.0	1.0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	166.7	1000.0

lpx:CountriesOtherThanTheUnitedStates

Period End	2020-12-31	2019-12-31
Value	100.0	1.0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	166.7	1000.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationInventoryCurrent us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationInventoryCurrent

us-gaap:DisposalGroupNotDiscontinuedOperations, lpx:EastRiverFacilityAndCanExel

Period End	2020-09-30
Value	10000000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationInventoryCurrent	100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment

us-gaap:DisposalGroupNotDiscontinuedOperations, lpx:EastRiverFacilityAndCanExel

Period End	2020-09-30
Value	5000000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment	100.0

us-gaap:DueFromRelatedPartiesCurrent

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	7000000.0	4000000.0	3800000.0	3600000.0	1900000.0	400000.0	800000.0	1200000.0	900000.0	700000.0	1100000.0	700000.0	1400000.0	800000.0	2600000.0	2900000.0	2500000.0	1400000.0	3300000.0	1300000.0	1200000.0	500000.0	1900000.0	1900000.0	1600000.0
Percentage of DueFromRelatedPartiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

Period End	2020-12-31
Value	5000000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	100.0

us-gaap:IncomeTaxReceivable

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31
Value	5.0	10.0	2.0	26	22	19	35	27	24	18	16	2.3	1.6	1.9	2.2	2.8	2.2	2.2	1.7	3.6	3.0	1.6	2.0	2.1	3.4	1.6	1.4	2.5	2.6	0.5	1.2	0.8	1.7	0.8	1.8
Percentage of IncomeTaxReceivable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncomeTaxesReceivable

Period End	2020-12-31	2019-12-31	2018-12-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	2.0	35	16	1.8	3.6	3.0	3.5	3.5	4.4	14	27	18
Percentage of IncomeTaxesReceivable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InventoryAdjustments

Period End	2020-12-31	2019-12-31	2018-12-31
Value	-12.0	-13.0	11
Percentage of InventoryAdjustments	100.0	100.0	100.0

us-gaap:InventoryFinishedGoodsNetOfReserves

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2014-12-31
Value	167	162	146	143	144	163	160	166	195	185	167	189	180	195	153	139	134	146	140	137	139	138	123	149
Percentage of InventoryFinishedGoodsNetOfReserves	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InventoryRawMaterialsAndSuppliesNetOfReserves

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	36	32	24	20	23	21	21
Percentage of InventoryRawMaterialsAndSuppliesNetOfReserves	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InventoryRawMaterialsNetOfReserves

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31
Value	48	38	36	35	32	30	32	31	30	25	24	24	25	24	20	24	24	22	23	24	25	21	21
Percentage of InventoryRawMaterialsNetOfReserves	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InventoryWorkInProcessNetOfReserves

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2014-12-31
Value	43	34	28	21	20	25	26	22	21	21	23	20	23	22	24	20	18	15	16	19	21	17	18	19
Percentage of InventoryWorkInProcessNetOfReserves	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LandAndLandImprovements

Period End	2020-12-31	2019-12-31	2018-12-31
Value	172	168	169
Percentage of LandAndLandImprovements	100.0	100.0	100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

Period End	2020-12-31
Value	9000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-05-31	2012-12-31	2011-12-31
Value	550	550	200	550	-550.0	550	100	100
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

lpx:AmendedCreditFacility, lpx:Seniorunsecurednotesmaturing2024, us-gaap:LineOfCredit

Period End	2020-12-31
Value	550
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity	275.0

us-gaap:LetterOfCredit, lpx:Seniorunsecurednotesmaturing2024, us-gaap:LineOfCredit

Period End	2020-12-31
Value	60
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity	30.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	346	346	348	348	348	698	348
Percentage of LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LongTermDebtFairValue us-gaap:LongtermDebtType

us-gaap:LongTermDebtFairValue

lpx:SeniorUnsecuredNotesMaturing2029

Period End	2021-06-30	2021-03-31
Value	352	342
Percentage of LongTermDebtFairValue	100.0	100.0

lpx:Seniorunsecurednotesmaturing2024

Period End	2020-09-30	2020-06-30	2020-03-31
Value	360	356	310
Percentage of LongTermDebtFairValue	0.0	0.0	0.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

Period End	2020-12-31
Value	350
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	100.0

us-gaap:LossContingencyAccrualAtCarryingValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	13	13	14	11	9.0	9.0	10.0	10	15	16	16	14	14	15	14	15	14	14	14	14	20	20	20	21	21	32	32
Percentage of LossContingencyAccrualAtCarryingValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LossContingencyAccrualAtCarryingValue us-gaap:LossContingenciesByNatureOfContingency

lpx:EnvironmentalReserves

Period End	2020-12-31	2019-12-31
Value	14	10.0
Percentage of LossContingencyAccrualAtCarryingValue	100.0	100.0

us-gaap:ReserveForEnvironmentalCosts

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2009-12-31	2008-12-31
Value	14	14	13	11	9.0	9.0	10.0	10	15	15	16	13	13	15	14	14	13	13	14	14	14	14	14	15	15	14	14	14	6.5
Percentage of LossContingencyAccrualAtCarryingValue	107.7	107.7	92.9	100.0	100.0	100.0	100.0	98.1	99.3	98.8	98.8	95.8	94.5	94.9	98.0	97.4	96.5	96.5	95.9	95.3	71.1	70.6	70.5	70.8	69.7	46.1	43.5	0.0	0.0

us-gaap:LossContingencyAccrualCarryingValueCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	1000000.0	1000000.0	1000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2300000.0	2300000.0	2300000.0	3400000.0	3400000.0	3400000.0	3400000.0	3400000.0	3400000.0	3400000.0	1300000.0	1300000.0	1300000.0	1300000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	2000000.0	4000000.0	4000000.0	4000000.0	4000000.0	4000000.0	7000000.0	7000000.0	7000000.0
Percentage of LossContingencyAccrualCarryingValueCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LossContingencyAccrualCarryingValueNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	13	13	13	9.0	7.0	7.0	8.0	8.0	8.0	8.5	9.4	9.4	14	11	12	12	12	12	14	14	15	15	11	12	12	12	12	13	12	13	12	12	12	12	16	16	16	17	17	25	24	25
Percentage of LossContingencyAccrualCarryingValueNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:MinorityInterestOwnershipPercentageByParent us-gaap:Ownership

us-gaap:MinorityInterestOwnershipPercentageByParent

lpx:ResoluteForestProductsInc

Period End	2020-12-31
Value	50.0
Percentage of MinorityInterestOwnershipPercentageByParent	100.0

us-gaap:NotesPayableFairValueDisclosure us-gaap:DebtInstrument

us-gaap:NotesPayableFairValueDisclosure

lpx:Seniorunsecurednotesmaturing2024

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31
Value	360	362	337	363	344	366
Percentage of NotesPayableFairValueDisclosure	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OperatingLossCarryforwardsValuationAllowance

Period End	2020-12-31
Value	5.0
Percentage of OperatingLossCarryforwardsValuationAllowance	100.0

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	16	15	22
Percentage of OtherAccruedLiabilitiesCurrentAndNoncurrent	100.0	100.0	100.0

us-gaap:OtherInventoryMaterialsSuppliesAndMerchandiseUnderConsignment

Period End	2020-12-31	2019-12-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31
Value	7.0	12	9.5	18	18	19	18	15
Percentage of OtherInventoryMaterialsSuppliesAndMerchandiseUnderConsignment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherReceivablesGrossCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	25	30	23	21	21	19	19	19	16	18	25	17	13	16	16	12	11	10	11	7.9	15	16	12	7.9	8.9	9.6	11	10.0	8.0	7.0	8.6	6.7	3.9	3.8	5.2	8.4	6.0	8.1	9.1	8.6	9.8	10
Percentage of OtherReceivablesGrossCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherReceivablesNetCurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	23	19	25
Percentage of OtherReceivablesNetCurrent	100.0	100.0	100.0

us-gaap:PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesCurrentAndNoncurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	9000000.0	9000000.0	8000000.0
Percentage of PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesCurrentAndNoncurrent	100.0	100.0	100.0

us-gaap:PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent

Period End	2020-12-31	2019-12-31	2018-12-31
Value	17	25	25
Percentage of PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	100.0	100.0	100.0

us-gaap:PrepaidExpenseCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	20	10.0	15	18	15	11	9.0	14	11	8.7	8.2	11	13	9.0	7.8	8.8	9.3	7.3	6.1	8.4	9.3	5.9	7.0	8.9	7.0	22	25	9.4	7.1	5.2	7.7	10	11	4.5	6.0	8.2	8.7	3.9	5.7	8.6	8.6	3.2	5.6
Percentage of PrepaidExpenseCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProductWarrantyAccrual

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31	2009-12-31	2008-12-31
Value	8.0	8.0	8.0	8.0	8.0	8.0	8.0	9.0	9.0	13	13	14	22	24	24	26	25	24	24	21	25	18	21	25	25	27	31	23	24	26	29	19	21	19	21	23	26	27	30	35	30	28	29	27	30	31	32	33
Percentage of ProductWarrantyAccrual	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProductWarrantyAccrualClassifiedCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2010-09-30	2010-06-30	2009-12-31
Value	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	3.0	3.0	4.0	4.0	9.0	9.0	9.0	9.0	9.0	9.0	9.0	-9.0	6.0	6.0	10.0	10.0	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	10.0	10.0	10.0	10.0	7.0
Percentage of ProductWarrantyAccrualClassifiedCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProductWarrantyAccrualNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31	2010-09-30	2010-06-30	2009-12-31
Value	6.0	6.0	6.0	6.0	6.0	6.0	6.0	7.0	7.0	10.0	10	10	18	15	15	17	16	15	15	12	16	12	15	15	15	15	19	11	12	14	17	7.6	9.0	7.4	9.4	11	14	15	18	23	20	19	17	20	25
Percentage of ProductWarrantyAccrualNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	9.0	9.0	10.0	11	11	10.0	10.0	12	13	14	0.0
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0

us-gaap:RedeemableNoncontrollingInterestEquityCommonFairValue

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	10.0	10.0	12	13	14	0.0	0.0	0.0	0.0	0.0
Percentage of RedeemableNoncontrollingInterestEquityCommonFairValue	100.0	100.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0	0.0

us-gaap:ReorganizationValueNetRealizableValueOfAssetDispositions

Period End	2020-12-31
Value	8000000.0
Percentage of ReorganizationValueNetRealizableValueOfAssetDispositions	100.0

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent

Period End	2020-12-31	2019-12-31	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31
Value	0.0	14	14	13	13	13	13	13	13	13	13	13	13	15	15	14	14	15	15	10	10	10	10	11	11	11	10	10	12	11	11	12	12	14	14	22	31
Percentage of RestrictedCashAndCashEquivalentsNoncurrent	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RestrictedCashNoncurrent

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31	2019-12-31
Value	13	13	0.0	0.0	14
Percentage of RestrictedCashNoncurrent	100.0	100.0	0.0	0.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:RestrictedStockUnitsRSU

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2011-12-31	2010-12-31
Value	1228300.0	1139200.0	956610.0	663170.0	676270.0	535980.0	545660.0	554660.0	573710.0	593610.0	626100.0	597320.0	646240.0	752600.0	772280.0	774280.0	741590.0	960390.0	1112900.0	955940.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	27.42	24.82	23.17	17.75	16.64
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice

lpx:SSARs

Period End	2020-12-31
Value	15.56
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber

lpx:SSARs

Period End	2020-12-31
Value	387540.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

lpx:SSARs

Period End	2020-12-31
Value	15.56
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	100.0

us-gaap:StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased

Period End	2020-11-04
Value	200
Percentage of StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	100.0

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

Period End	2020-12-31
Value	300
Percentage of StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	100.0

us-gaap:TaxCreditCarryforwardAmount

Period End	2020-12-31
Value	10000000.0
Percentage of TaxCreditCarryforwardAmount	100.0

us-gaap:TaxCreditCarryforwardValuationAllowance

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31
Value	5.0	5.0	6.5	9.7	32	48
Percentage of TaxCreditCarryforwardValuationAllowance	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:TaxesPayableCurrentAndNoncurrent

Period End	2020-12-31
Value	15
Percentage of TaxesPayableCurrentAndNoncurrent	100.0

us-gaap:TimberAndTimberlands us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:TimberAndTimberlands

us-gaap:ProductiveLand

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2018-12-31
Value	33	33	34	35	36	37	38	39	39	41
Percentage of TimberAndTimberlands	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:TradingSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:TradingSecurities

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2012-12-31
Value	5000000.0	4000000.0	3100000.0	3100000.0	2600000.0	2300000.0	2200000.0	2400000.0	2400000.0	2300000.0	2200000.0	2200000.0	2100000.0	2000000.0	2000000.0	1700000.0
Percentage of TradingSecurities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:TradingSecurities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2012-12-31
Value	5000000.0	4000000.0	3100000.0	3100000.0	2600000.0	2300000.0	2200000.0	2400000.0	2400000.0	2300000.0	2200000.0	2200000.0	2100000.0	2000000.0	2000000.0	1700000.0
Percentage of TradingSecurities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:TradingSecuritiesEquity

Period End	2021-06-30	2021-03-31	2020-09-30
Value	6000000.0	5000000.0	4000000.0
Percentage of TradingSecuritiesEquity	100.0	100.0	100.0

us-gaap:TreasuryStockCommonShares us-gaap:StatementEquityComponents

us-gaap:TreasuryStockCommonShares

us-gaap:TreasuryStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	17	17	17	17	17	18	18	18	18	18	16	11	9.4	8.2	8.4
Percentage of TreasuryStockCommonShares	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:TreasuryStockShares

Period End	2021-06-30	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	16	17	17	17	17	17	16	8.462949	9.041733	9.995456	10	10	11	12
Percentage of TreasuryStockShares	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:UndistributedEarningsOfForeignSubsidiaries

Period End	2020-12-31
Value	143
Percentage of UndistributedEarningsOfForeignSubsidiaries	100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Period End	2020-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	11	40	39	39	3.7	14	12	12	12	1.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0