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Related Party Transactions - Summary of Distributions Paid (Details) - CVR Partners LP [Member] - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended 12 Months Ended
Aug. 23, 2021
Sep. 30, 2021
Dec. 31, 2020
Related Party Transaction [Line Items]      
Distributions paid (in dollars per share) $ 1.72 $ 0 $ 0
Distributions paid $ 18    
Parent      
Related Party Transaction [Line Items]      
Distributions paid 7    
Common Unitholders [Member]      
Related Party Transaction [Line Items]      
Distributions paid $ 11