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Share-Based Compensation - Share-Based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share-Based Compensation    
Total Share-Based Compensation Expense $ 8 $ (2)
Performance Unit Awards    
Share-Based Compensation    
Total Share-Based Compensation Expense (3) 0
Incentive Unit Awards    
Share-Based Compensation    
Total Share-Based Compensation Expense 7 (1)
CVR Partners | CVR Partners LTIP | Phantom Units Award    
Share-Based Compensation    
Total Share-Based Compensation Expense $ 4 $ (1)