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Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]    
Net loss $ (23) $ (63)
Other comprehensive income:    
Foreign currency translation adjustments 10 23
Comprehensive loss $ (13) $ (40)