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Income Taxes - Income Tax Effect of Temporary Differences (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Deferred income tax assets:    
Personnel accruals $ 2 $ 0
State tax credit carryforward, net 20 7
Net operating loss carryforward 9 0
Total gross deferred income tax assets 31 7
Deferred income tax liabilities:    
Other (3) (1)
Total gross deferred income tax liabilities (399) (403)
Net deferred income tax liabilities (368) (396)
CVR Partners    
Deferred income tax liabilities:    
Unrealized gain (9) 0
Investment in CVR Partners and CVR Refining (67) (61)
CVR Refining    
Deferred income tax liabilities:    
Investment in CVR Partners and CVR Refining $ (320) $ (341)