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Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]    
Net loss $ (10) $ (331)
Other comprehensive income (loss):    
Foreign currency translation adjustments 1 (39)
Comprehensive loss $ (9) $ (370)