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Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]        
Net loss $ (2) $ (30) $ (12) $ (361)
Other comprehensive income (loss):        
Foreign currency translation adjustments $ 2 8 3 (31)
Comprehensive income (loss)   $ (22) $ (9) $ (392)