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Share-Based Compensation - Share-Based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-Based Compensation        
Total Share-Based Compensation Expense $ 11 $ (1) $ 31 $ 0
Performance Unit Awards        
Share-Based Compensation        
Total Share-Based Compensation Expense 0 0 (3) 0
Incentive Unit Awards        
Share-Based Compensation        
Total Share-Based Compensation Expense 5 (1) 16 0
CVR Partners | CVR Partners LTIP | Phantom Units Award        
Share-Based Compensation        
Total Share-Based Compensation Expense $ 6 $ 0 $ 18 $ 0