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Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]    
Tax benefit of loss carryforwards $ 715 $ 614
Liabilities currently not deductible for tax 106 211
Tax credit carryforwards 22 24
Unrealized loss on cash flow hedges and retirement liabilities 134 154
Other assets tax value in excess of book values 36 11
Others 21 5
Deferred tax assets, Gross, Total 1,034 1,019
Valuation allowance against tax benefit of loss carryforwards (615) (562)
Other valuation allowance (66) (50)
Deferred tax assets, Net, Total 353 407
Tax depreciation in excess of book depreciation 277 249
Tax on undistributed foreign earnings 98 10
Unrealized gain on cash flow hedges and retirement liabilities 3 9
Deferred tax liabilities, Total 378 268
Net deferred tax (liabilities) $ (25)  
Net deferred tax assets   $ 139