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Equity Method Investment (Details)
bbl / d in Thousands, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 19, 2016
bbl / d
mi
Nov. 30, 2017
USD ($)
Mar. 31, 2018
USD ($)
bbl / d
Mar. 31, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Oct. 31, 2017
mi
Related Party Transaction [Line Items]              
Equity method investments in affiliates of VIEs     $ 83.5     $ 82.8  
Investment in joint venture     0.0 $ 1.4      
Income from equity method investment     0.4        
CVR Refining Limited Partnership [Member] | Plains All American Pipeline, L.P. [Member] | Midway Transportation Agreement              
Related Party Transaction [Line Items]              
Related party costs     $ 3.1        
Transportation agreement, average barrels per day | bbl / d     73        
CRRM | Velocity Central Oklahoma Pipeline LLC | Velocity Transportation Agreement              
Related Party Transaction [Line Items]              
Initial term of agreement           20 years  
Related party costs     $ 1.5        
Transportation agreement, average barrels per day | bbl / d     41        
Due to related party     $ 0.5     $ 0.3  
Velocity Pipeline Partners, LLC | Coffeyville Resources Pipeline, LLC              
Related Party Transaction [Line Items]              
Pipeline capacity, barrels per day | bbl / d 65            
Joint venture interest     40.00%        
Equity method investments in affiliates of VIEs     $ 6.1     6.1  
Investment in joint venture         $ 7.0 1.4  
Distribution received from equity method investment     $ 0.4        
Velocity Pipeline Partners, LLC | Velocity Central Oklahoma Pipeline LLC              
Related Party Transaction [Line Items]              
Joint venture interest held by others     60.00%        
Midway Pipeline LLC              
Related Party Transaction [Line Items]              
Ownership percentage in joint venture             50.00%
Midway Pipeline LLC | Coffeyville Resources Pipeline, LLC              
Related Party Transaction [Line Items]              
Joint venture interest     50.00%        
Midway Pipeline LLC | CVR Refining Limited Partnership [Member]              
Related Party Transaction [Line Items]              
Pipeline length (in miles) | mi 25           100
Equity method investments in affiliates of VIEs     $ 77.3     $ 76.7  
Investment in joint venture   $ 76.0          
Income from equity method investment     1.1        
Distribution received from equity method investment     $ 0.5