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Share based Compensation - RSUs and PBRSUs Summary (Details) - Unvested restricted stock units - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Number of Shares      
Non-vested units as of the beginning of the period (in shares) 7,341 7,080 5,792
Granted (in shares) 5,048 3,191 4,692
Vested (in shares) (2,251) (1,863) (2,164)
Forfeited (in shares) (421) (1,067) (1,240)
Non-vested units as of the end of the period (in shares) 9,717 7,341 7,080
Weighted Average Grant Date Fair Value      
Non-vested units as of the beginning of the period (in dollars per share) $ 13.90 $ 11.35 $ 11.18
Granted (in dollars per share) 11.93 16.94 11.29
Vested (in dollars per share) 12.48 15.77 10.70
Forfeited (in dollars per share) 12.06 12.82 11.14
Non-vested units as of the end of the period (in dollars per share) $ 13.07 $ 13.90 $ 11.35
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Non-vested units, weighted average remaining years 2 years 1 month 6 days    
Non-vested units, aggregate intrinsic value $ 118.6