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Equity Method Investments (Details)
$ in Millions
3 Months Ended
Jul. 30, 2019
USD ($)
Mar. 31, 2020
USD ($)
joint_venture
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
May 31, 2019
USD ($)
Jul. 01, 2017
May 14, 2015
Schedule of Equity Method Investments [Line Items]              
Equity method investments   $ 365.2   $ 407.3      
Distribution from equity method investments   69.4 $ 0.8        
Payments to Acquire Equity Method Investments   27.1 4.8        
Income from equity method investment   5.1 $ 2.6        
Red River Pipeline Company LLC [Member]              
Schedule of Equity Method Investments [Line Items]              
Equity method investments   140.9   131.0 $ 124.7    
Equity method investment, ownership percentage (as percent)         33.00%    
Red River Expansion [Member]              
Schedule of Equity Method Investments [Line Items]              
Equity method investments         $ 3.5    
Wink To Webster Pipeline LLC              
Schedule of Equity Method Investments [Line Items]              
Equity method investments   73.9   125.3      
Distribution from equity method investments   69.3          
Equity method investment, ownership percentage (as percent)             15.00%
Payments to Acquire Equity Method Investments   18.9          
Income from equity method investment   (1.1)          
Red River              
Schedule of Equity Method Investments [Line Items]              
Income from equity method investment   1.8          
Joint Ventures | Delek US Holdings, Inc.              
Schedule of Equity Method Investments [Line Items]              
Equity method investment, ownership percentage (as percent)           50.00%  
Joint Ventures | Delek Logistics              
Schedule of Equity Method Investments [Line Items]              
Equity method investments   $ 114.9   116.0      
Number of joint ventures | joint_venture   2          
Joint Ventures | Delek Renewables, LLC              
Schedule of Equity Method Investments [Line Items]              
Equity method investments   $ 4.5   4.3      
Joint Ventures | Delek US Holdings, Inc.              
Schedule of Equity Method Investments [Line Items]              
Equity method investments   $ 31.1   $ 30.7      
Minimum | Wink To Webster Pipeline LLC              
Schedule of Equity Method Investments [Line Items]              
Payments to Acquire Equity Method Investments $ 340.0            
Expected Period Of Construction 2 years            
Maximum | Wink To Webster Pipeline LLC              
Schedule of Equity Method Investments [Line Items]              
Payments to Acquire Equity Method Investments $ 380.0            
Expected Period Of Construction 3 years