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NET LOSS PER SHARE - Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Numerator:        
Net loss attributable to common shareholders -basic $ (54) $ (144) $ (26) $ (414)
Net loss attributable to common shareholders – diluted $ (54) $ (144) $ (26) $ (414)
Denominator:        
Weighted average shares outstanding - basic (in shares) 624,958,000 588,374,000 622,064,000 576,941,000
Weighted average shares outstanding - diluted (in shares) 624,958,000 588,374,000 622,064,000 576,941,000
Basic net loss per share (in dollars per share) $ (0.09) $ (0.24) $ (0.04) $ (0.72)
Diluted net loss per share (in dollars per share) $ (0.09) $ (0.24) $ (0.04) $ (0.72)