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Stock-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 28, 2022
$ / shares
Jul. 31, 2022
USD ($)
shares
Jun. 30, 2022
$ / shares
shares
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
Award_Type
$ / shares
shares
Sep. 30, 2021
USD ($)
Stock-based Compensation arrangements              
Stock based compensation expense | $       $ 26 $ 10 $ 70 $ 26
Restricted Stock Units              
Stock-based Compensation arrangements              
Granted (in shares)     45,472        
Granted (in dollars per share) | $ / shares     $ 35.19        
Restricted Stock Units | Share-based Payment Arrangement, Employee              
Stock-based Compensation arrangements              
Granted (in shares)           2,244,405  
Granted (in dollars per share) | $ / shares           $ 24.80  
Service period           3 years  
Restricted Stock Units | Share-based Payment Arrangement, Employee | Minimum              
Stock-based Compensation arrangements              
Award vesting period           3 years  
Annual forfeiture rate assumption (as a percent)           0.00%  
Restricted Stock Units | Share-based Payment Arrangement, Employee | Maximum              
Stock-based Compensation arrangements              
Annual forfeiture rate assumption (as a percent)           5.00%  
Performance Share Awards              
Stock-based Compensation arrangements              
Granted (in shares)   1,775,790          
Number of performance award types | Award_Type           2  
Right to receive shares           100.00%  
Grant fair value issued and fully vested | $   $ 22          
Performance Share Awards | Minimum              
Stock-based Compensation arrangements              
Annual forfeiture rate assumption (as a percent)           0.00%  
Performance Share Awards | Maximum              
Stock-based Compensation arrangements              
Annual forfeiture rate assumption (as a percent)           5.00%  
Internal Metrics Performance Share Awards              
Stock-based Compensation arrangements              
Number of performance award types | Award_Type           1  
Performance Shares Based on Market Conditions              
Stock-based Compensation arrangements              
Number of performance award types | Award_Type           1  
Right to receive shares           100.00%  
Right to receive an additional award in cash           100.00%  
TSR Performance Share Awards              
Stock-based Compensation arrangements              
Granted (in shares)           1,161,599  
Granted (in dollars per share) | $ / shares $ 17.89         $ 12.47  
Performance period           3 years