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Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]    
Net income (loss) $ 2 $ (23)
Other comprehensive income:    
Foreign currency translation adjustments 1 10
Comprehensive income (loss) $ 3 $ (13)