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Income Taxes - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Aug. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Taxes [Line Items]        
Minimum ownership interest in CVR Energy for eligibility to file as member of AEPC consolidated federal income tax group   80.00%    
Receivable from the IRS and state jurisdictions   $ 44,000,000    
Payable due to the IRS and certain state jurisdictions     $ 20,000,000  
Valuation allowance   0 0  
Unrecognized tax benefits which, if recognized, would impact the company's effective tax rate   13,000,000 15,000,000 $ 18,000,000
Unrecognized tax benefits netted with deferred tax asset carryforwards   8,000,000 10,000,000  
Interest expense (benefit) recognized on uncertain tax positions   0 0 (1,000,000)
Liability for interest   1,000,000 0 0
Penalties recognized on uncertain tax positions   0 0 $ 0
State        
Income Taxes [Line Items]        
Tax credit carry-forwards   30,000,000    
Unrecognized tax benefits reasonably possible to be recognized in next fiscal year   0    
AEP        
Income Taxes [Line Items]        
Payable for state income taxes due to AEP   $ 0 $ 0  
AEP | Majority Shareholder        
Income Taxes [Line Items]        
Minimum ownership interest in CVR Energy for eligibility to file as member of AEPC consolidated federal income tax group   80.00%    
Exchange Offer, CVR Refining Common Units for CVR Energy Common Stock        
Income Taxes [Line Items]        
Common stock exchanged in the exchange offer (in shares) 13,699,549      
Exchange Offer, CVR Refining Common Units for CVR Energy Common Stock | CVR Refining        
Income Taxes [Line Items]        
Number of shares tendered in exchange offer (in shares) 21,625,106