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Benefit Plans (Details) (Defined-contribution 401(k) plans, USD $)
In Millions, unless otherwise specified
12 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2012
Y
plan
Dec. 31, 2011
Dec. 31, 2010
Apr. 01, 2013
plan
Dec. 31, 2012
CVR
Dec. 31, 2012
Nonunion plan
CVR
Dec. 31, 2012
Union plan
Wynnewood Acquisition
Dec. 31, 2012
Union plan
CVR
Apr. 03, 2013
Union plan
CVR
Wynnewood Acquisition
Benefit Plans                  
Number of defined-contribution 401(k) plans 3     2          
Employee contribution limit per calendar year as a percentage of annual salaries         50.00%        
Employee contribution limit per calendar year as a percentage of annual income sharing         100.00%        
Employer match of employee contributions of first 6% of eligible compensation (as a percent)           100.00% 80.00% 100.00% 100.00%
Percentage of eligible compensation, matched by employer           6.00% 5.00% 6.00% 6.00%
Employer contribution each pay period (as a percent)             3.00%    
Vesting schedule for employer's matching funds 3                
Matching contributions made by the company during the year $ 4.5 $ 2.3 $ 2.2