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No authoritative reference available. false 4 Cost of sales 1 us-gaap_CostOfGoodsSold us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -231000000 -231 false false false 2 false true false false -263000000 -263 false false false 3 false true false false -539000000 -539 false false false 4 false true false false -641000000 -641 false false false xbrli:monetaryItemType monetary Total costs related to goods produced and sold during the reporting period. 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No authoritative reference available. false 6 Depreciation and amortization expense 1 us-gaap_CostOfServicesDepreciationAndAmortization us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -90000000 -90 false false false 2 false true false false -89000000 -89 false false false 3 false true false false -165000000 -165 false false false 4 false true false false -175000000 -175 false false false xbrli:monetaryItemType monetary Depreciation of property, plant and equipment directly related to services rendered by an entity during the reporting period. No authoritative reference available. false 7 Goodwill impairments 1 us-gaap_GoodwillImpairmentLoss us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 0 0 false false false 2 false true false false 0 0 false false false 3 false true false false 0 0 false false false 4 false true false false -433000000 -433 false false false xbrli:monetaryItemType monetary Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment. 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No authoritative reference available. false 9 General and administrative expenses 1 us-gaap_GeneralAndAdministrativeExpense us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -28000000 -28 false false false 2 false true false false -45000000 -45 false false false 3 false true false false -59000000 -59 false false false 4 false true false false -83000000 -83 false false false xbrli:monetaryItemType monetary The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. No authoritative reference available. false 10 Operating income (loss) 1 us-gaap_OperatingIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false -229000000 -229 false false false 2 false true false false -471000000 -471 false false false 3 false true false false 102000000 102 false false false 4 false true false false -617000000 -617 false false false xbrli:monetaryItemType monetary The net result for the period of deducting operating expenses from operating revenues. No authoritative reference available. true 11 Earnings (losses) from unconsolidated investments 1 us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 false false false 2 false true false false 13000000 13 false false false 3 false true false false -34000000 -34 false false false 4 false true false false 21000000 21 false false false xbrli:monetaryItemType monetary This element represents the undistributed income (or loss) of equity method investments, net of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations; such investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities. 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Includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. 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If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. 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