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Deferred Tax Assets and Liabilities Temporary Differences (Detail) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Deferred income tax assets:    
Accrued postretirement and postemployment benefits $ 191 $ 214
Accrued pension costs 313 370
Other employee benefits 155 237
Accrued expenses 269 379
Loss carryforwards 773 619
Tax credit carryforwards 370 0
Other 342 331
Total deferred income tax assets 2,413 2,150
Valuation allowance (853) (310)
Net deferred income tax assets 1,560 1,840
Deferred income tax liabilities:    
Intangible assets (3,977) (5,174)
Property, plant and equipment (452) (557)
Other (188) (472)
Total deferred income tax liabilities (4,617) (6,203)
Net deferred income tax liabilities $ (3,057) $ (4,363)