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Income Tax - Income Tax Benefit (Expense) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
The Netherlands Taxes - current $ (1) $ (2) $ 5
Foreign taxes - current (101) (69) (43)
Total current taxes (102) (71) (38)
The Netherlands Taxes - deferred 0 0 0
Foreign taxes - deferred (41) 40 59
Total deferred taxes (41) 40 59
Income tax benefit (expense) $ (143) $ (31) $ 21
Effective tax rate 15.00% 15.00% (24.00%)