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Summary of Significant Accounting Policies - Schedule of Effects of Accounting Changes on Statement of Operations and Statement of Cash Flows (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Consolidated Statement of Operations      
Direct operating expenses $ 478 $ 533 $ 517
Depreciation and amortization 268 278 263
Income tax expense (benefit) (95) 129 79
Net income (loss) (320) 362 366
Less: Net income (loss) attributable to noncontrolling interest (64) (18) 107
Net (loss) income attributable to CVR Energy stockholders (256) 380 259
Consolidated Statement of Cash Flows      
Net cash provided by operating activities 90 747 628
Net cash used by investing activities $ (423) $ (121) (108)
As Previously Reported      
Consolidated Statement of Operations      
Direct operating expenses     523
Depreciation and amortization     202
Income tax expense (benefit)     89
Net income (loss)     411
Less: Net income (loss) attributable to noncontrolling interest     122
Net (loss) income attributable to CVR Energy stockholders     289
Consolidated Statement of Cash Flows      
Net cash provided by operating activities     620
Net cash used by investing activities     (100)
Adjustment | Effect of Turnaround Accounting Change      
Consolidated Statement of Operations      
Direct operating expenses     (6)
Depreciation and amortization     61
Income tax expense (benefit)     (10)
Net income (loss)     (45)
Less: Net income (loss) attributable to noncontrolling interest     (15)
Net (loss) income attributable to CVR Energy stockholders     (30)
Consolidated Statement of Cash Flows      
Net cash provided by operating activities     8
Net cash used by investing activities     $ (8)