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Related Party Transactions - Summary of Dividends (Details) $ / shares in Units, $ in Millions							3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 23, 2021 USD ($)	Aug. 02, 2021 USD ($) $ / shares	Jun. 10, 2021 USD ($) $ / shares shares	May 26, 2021 USD ($) $ / shares	May 26, 2020 USD ($) $ / shares	Mar. 09, 2020 USD ($) $ / shares	Jun. 30, 2021 USD ($) $ / shares	Jun. 30, 2020 USD ($) $ / shares	Jun. 30, 2021 USD ($) $ / shares	Jun. 30, 2020 USD ($) $ / shares	Dec. 31, 2020 USD ($) $ / shares
Related Party Transaction [Line Items]
Dividends declared related to quarterly results (in dollars per share) | $ / shares							$ 0		$ 0
Dividends paid related to quarterly results (in dollars per share) | $ / shares									$ 0
Dividends declared per share (in dollars per share) | $ / shares				$ 4.89
Dividends Paid					$ 40	$ 80			$ 241	$ 121	$ 121
Dividend per share (in dollars per share) | $ / shares					$ 0.40	$ 0.80	$ 4.89	$ 0.40	$ 4.89	$ 1.20	$ 1.20
Realized gain on investment			$ 112
IEP Energy LLC
Related Party Transaction [Line Items]
Proceeds from dividends received			171
CVR Partners
Related Party Transaction [Line Items]
Distributions declared (in dollars per share) | $ / shares									0
Distributions paid (in dollars per share) | $ / shares									$ 0		$ 0
CVR Partners | Subsequent Event
Related Party Transaction [Line Items]
Distributions declared (in dollars per share) | $ / shares		$ 1.72
Distributions declared		$ 18
CVR Energy | Forecast
Related Party Transaction [Line Items]
Proceeds from distribution	$ 7
Delek
Related Party Transaction [Line Items]
Special dividend				$ 492
Dividends Paid			$ 241
Dividend per share (in dollars per share) | $ / shares			$ 2.40
Dividends paid to CVR Energy stockholders (in shares) | shares			10,539,880
Outstanding shares of common stock, percent			0.143
Delek | IEP Energy LLC
Related Party Transaction [Line Items]
Common stock dividends, shares received (in shares) | shares			7,464,652
IEP
Related Party Transaction [Line Items]
Dividends Paid					$ 28	$ 57	$ 348	$ 28	$ 348	$ 85	$ 85
Stockholders
Related Party Transaction [Line Items]
Dividends Paid					$ 12	$ 23					$ 35

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