1.0.0.3 false Consolidated Statements of Cash Flows (USD $) In Millions false 1 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 3 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 3 Cash flows from operating activities: 1 us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 4 Net income 2 us-gaap_NetIncomeLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 948000000 948 false false 2 true true 887000000 887 false false 3 true true 898000000 898 false false No definition available. No authoritative reference available. false 5 Adjustments to reconcile to net cash provided by (used in) operating activities: 2 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 6 Depreciation and amortization 3 us-gaap_DepreciationAndAmortization us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 32000000 32 false false 2 false true 32000000 32 false false 3 false true 40000000 40 false false No definition available. No authoritative reference available. false 7 Deferred income taxes 3 us-gaap_DeferredIncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -9000000 -9 false false 2 false true 72000000 72 false false 3 false true -62000000 -62 false false No definition available. No authoritative reference available. false 8 Share-based compensation 3 us-gaap_ShareBasedCompensation us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 5000000 5 false false 2 false true 3000000 3 false false 3 false true 2000000 2 false false No definition available. No authoritative reference available. false 9 Gain on investments 3 us-gaap_GainLossOnInvestments us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 0 0 false false 3 false true -34000000 -34 false false No definition available. No authoritative reference available. false 10 Amortization of marketable securities 3 us-gaap_InvestmentIncomeNetAmortizationOfDiscountAndPremium us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 0 0 false false 3 false true -22000000 -22 false false No definition available. No authoritative reference available. false 11 Pension, health and life insurance benefits expense 3 us-gaap_PensionAndOtherPostretirementBenefitExpense us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 46000000 46 false false 2 false true 21000000 21 false false 3 false true 24000000 24 false false No definition available. No authoritative reference available. false 12 Pension, health and life insurance contributions 3 us-gaap_PensionAndOtherPostretirementBenefitContributions us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -37000000 -37 false false 2 false true -32000000 -32 false false 3 false true -31000000 -31 false false No definition available. No authoritative reference available. false 13 Excess tax benefits from share-based arrangements 3 us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -1000000 -1 false false 2 false true 0 0 false false 3 false true 0 0 false false No definition available. No authoritative reference available. false 14 Changes in operating assets and liabilities: 2 us-gaap_IncreaseDecreaseInOperatingCapitalAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 15 Accounts and other receivables 3 us-gaap_IncreaseDecreaseInAccountsReceivable us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 12000000 12 false false 2 false true -38000000 -38 false false 3 false true 6000000 6 false false No definition available. No authoritative reference available. false 16 Inventories 3 us-gaap_IncreaseDecreaseInInventories us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -26000000 -26 false false 2 false true -32000000 -32 false false 3 false true -40000000 -40 false false No definition available. No authoritative reference available. false 17 Accounts payable and accrued liabilities 3 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 56000000 56 false false 2 false true 28000000 28 false false 3 false true -20000000 -20 false false No definition available. No authoritative reference available. false 18 Settlement costs 3 lo_IncreaseDecreaseSettlementCostsLegal lo false debit duration monetary The net change during the reporting period in the amount of settlement costs. false false false false false false false false false 1 false true 8000000 8 false false 2 false true 43000000 43 false false 3 false true 102000000 102 false false The net change during the reporting period in the amount of settlement costs. No authoritative reference available. false 19 Income taxes 3 us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 5000000 5 false false 3 false true -44000000 -44 false false No definition available. No authoritative reference available. false 20 Other assets 3 us-gaap_IncreaseDecreaseInOtherOperatingAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -4000000 -4 false false 2 false true 9000000 9 false false 3 false true -9000000 -9 false false No definition available. No authoritative reference available. false 21 Litigation accrual 3 lo_LitigationAccrual lo false debit duration monetary Litigation accrual. false false false false false false false false false 1 false true 0 0 false false 2 false true 0 0 false false 3 false true 66000000 66 false false Litigation accrual. No authoritative reference available. false 22 Other 3 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 7000000 7 false false 2 false true -18000000 -18 false false 3 false true 6000000 6 false false No definition available. No authoritative reference available. true 23 Net cash provided by operating activities 2 us-gaap_NetCashProvidedByUsedInOperatingActivities us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 1037000000 1037 false false 2 false true 980000000 980 false false 3 false true 882000000 882 false false No definition available. No authoritative reference available. true 24 Cash flows from investing activities: 1 us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 25 Purchases of investments 2 us-gaap_PaymentsToAcquireInvestments us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true -1050000000 -1050 false false 3 false true -4916000000 -4916 false false No definition available. No authoritative reference available. false 26 Proceeds from sales of investments 2 us-gaap_ProceedsFromSaleOfShortTermInvestments us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 545000000 545 false false 3 false true 1934000000 1934 false false No definition available. No authoritative reference available. false 27 Proceeds from maturities of investments 2 us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 750000000 750 false false 3 false true 3400000000 3400 false false No definition available. No authoritative reference available. false 28 Additions to plant and equipment 2 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -51000000 -51 false false 2 false true -44000000 -44 false false 3 false true -51000000 -51 false false No definition available. No authoritative reference available. true 29 Net cash provided by (used in) investing activities 2 us-gaap_NetCashProvidedByUsedInInvestingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -51000000 -51 false false 2 false true 201000000 201 false false 3 false true 367000000 367 false false No definition available. No authoritative reference available. true 30 Cash flows from financing activities: 1 us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 31 Dividends paid 2 us-gaap_DividendsCommonStockCash us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -631000000 -631 false false 2 false true -804000000 -804 false false 3 false true -1170000000 -1170 false false No definition available. No authoritative reference available. false 32 Shares repurchased 2 us-gaap_PaymentsForRepurchaseOfCommonStock us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -910000000 -910 false false 2 false true -400000000 -400 false false 3 false true 0 0 false false No definition available. No authoritative reference available. false 33 Proceeds from issuance of long-term debt 2 us-gaap_ProceedsFromIssuanceOfLongTermDebt us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 750000000 750 false false 2 false true 0 0 false false 3 false true 0 0 false false No definition available. No authoritative reference available. false 34 Debt issuance costs 2 us-gaap_PaymentsOfDebtIssuanceCosts us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -5000000 -5 false false 2 false true 0 0 false false 3 false true 0 0 false false No definition available. No authoritative reference available. false 35 Proceeds from exercise of stock options 2 us-gaap_ProceedsFromStockOptionsExercised us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 2000000 2 false false 2 false true 0 0 false false 3 false true 0 0 false false No definition available. No authoritative reference available. false 36 Excess tax benefits from share-based arrangements 2 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 1000000 1 false false 2 false true 4000000 4 false false 3 false true 3000000 3 false false No definition available. No authoritative reference available. true 37 Net cash used in financing activities 2 us-gaap_NetCashProvidedByUsedInFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -793000000 -793 false false 2 false true -1200000000 -1200 false false 3 false true -1167000000 -1167 false false No definition available. No authoritative reference available. true 38 Change in cash and cash equivalents 1 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 193000000 193 false false 2 false true -19000000 -19 false false 3 false true 82000000 82 false false No definition available. No authoritative reference available. true 39 Cash and cash equivalents, beginning of year 1 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false true false false 1 false true 1191000000 1191 false false 2 false true 1210000000 1210 false false 3 false true 1128000000 1128 false false No definition available. No authoritative reference available. false 40 Cash and cash equivalents, end of year 1 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false true false 1 false true 1384000000 1384 false false 2 false true 1191000000 1191 false false 3 false true 1210000000 1210 false false No definition available. No authoritative reference available. false 41 Cash paid for income taxes 1 us-gaap_IncomeTaxesPaidNet us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 563000000 563 false false 2 false true 514000000 514 false false 3 false true 598000000 598 false false No definition available. No authoritative reference available. true 42 Cash paid for interest, net of interest rate swaps 1 us-gaap_InterestPaid us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 28000000 28 false false 2 true true 0 0 false false 3 true true 0 0 false false No definition available. No authoritative reference available. true false 3 40 false Millions UnKnown UnKnown false true