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Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement of Comprehensive Income [Abstract]      
Net loss $ (236) $ (2,416) $ (767)
Other comprehensive income (loss):      
Currency translation adjustments 272 (97) (764)
Derivative financial instruments, net of tax 46 166 23
Change in defined benefit plans, net of tax 24 32 22
Comprehensive income (loss) 106 (2,315) (1,486)
Net income (loss) attributable to noncontrolling interests 1 (4) 2
Comprehensive income (loss) attributable to Company $ 105 $ (2,311) $ (1,488)