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Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
Tax benefit of loss carryforwards $ 622 $ 660
Operating lease liabilities 452  
Liabilities currently not deductible for tax 234 150
Tax credit carryforwards 70 57
Unrealized loss on foreign exchange hedges and retirement liabilities 69 106
Others 41 12
Deferred tax assets, Gross, Total 1,488 985
Valuation allowance against tax benefit of loss carryforwards (515) (506)
Other valuation allowance (170) (152)
Deferred tax assets, Net, Total 803 327
Operating lease right-of-use assets 447  
Tax depreciation in excess of book depreciation 242 220
Other assets book value in excess of tax values 66 50
Tax on undistributed foreign earnings 137 141
Unrealized gain on foreign exchange hedges and retirement liabilities 18 8
Unrealized gain on remeasurement of investments 4 9
Deferred tax liabilities, Total 914 428
Net deferred tax liabilities $ (111) $ (101)