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Deferred Tax Assets and liabilities Temporary Differences (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Deferred income tax assets:    
Accrued postretirement and postemployment benefits $ 230 $ 227
Accrued pension costs 414 588
Other employee benefits 265 272
Accrued expenses 343 410
Loss carryforwards 636 656
Other 352 431
Total deferred income tax assets 2,240 2,584
Valuation allowance (303) (345)
Net deferred income tax assets 1,937 2,239
Deferred income tax liabilities:    
Intangible assets (5,365) (5,843)
Property, plant and equipment (636) (784)
Other (409) (439)
Total deferred income tax liabilities (6,410) (7,066)
Net deferred income tax liabilities $ (4,473) $ (4,827)