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Income Taxes - Significant Components of Deferred Tax Assets and Liability (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:    
Allowances and operating liabilities $ 534 $ 491
Net operating loss carryforwards 153 170
Postretirement benefits 60 79
Tax credit carryforwards 405 166
Other 164 21
Valuation allowance (544) (63)
Total deferred tax assets 772 864
Deferred tax liabilities:    
Tax over book depreciation 267 277
Intangible assets 1,148 1,323
Deferred income 185 232
Accrued U.S. tax on unremitted earnings 53 55
Other 97 209
Total deferred tax liabilities 1,750 2,096
Net deferred tax liability $ 978 $ 1,232