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Long-Term Debt and Finance Lease Obligations - Nitrogen Fertilizer ABL (Details) - USD ($)
Dec. 31, 2020
Sep. 29, 2020
Sep. 28, 2020
Line of Credit | Asset Based (Nitrogen Fertilizer ABL) Credit Agreement | Revolving Credit Facility | CVR Partners      
Line of Credit Facility [Line Items]      
Aggregate principal amount of availability $ 20,000,000 $ 35,000,000 $ 50,000,000