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Significant Accounting Policies (Details)
 12 Months Ended
Jan. 01, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Feb. 28, 2021
JointVenture
Dec. 31, 2017
USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Commodity-based inventory   $ 178,900,000 $ 156,500,000      
Interest expense, net   (391,300,000) (337,800,000) $ (185,800,000)    
Decrease in estimated redemption value included in interest (income) expense, net       72,100,000    
Income attributable to mandatorily redeemable preferred interests   4,900,000   4,100,000    
Series A Preferred Stock [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Carrying value   $ 301,400,000 278,800,000     $ 216,500,000
Subsequent Event [Member] | New Accounting Pronouncement Early Adoption Effect [Member] | Series A Preferred Stock [Member] | ASU 2020-06 [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Carrying value $ 742,900,000          
Preferred stock, net proceeds at issuance $ 787,100,000          
Minimum [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Payment of commodities due period   10 days        
Maximum [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Payment of commodities due period   30 days        
Mandatorily Redeemable Preferred Interests [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Estimated redemption value   $ 0 0      
Mandatorily Redeemable Preferred Interests [Member] | West OK [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Ownership interest         100.00%  
Mandatorily Redeemable Preferred Interests [Member] | West TX [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Ownership interest         72.80%  
Mandatorily Redeemable Preferred Interests [Member] | Joint Ventures [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Number of joint ventures | JointVenture         2  
Notes receivable, face amount   $ 1,900,000,000        
Notes receivable, due date   Jul. 31, 2042        
Interest expense, net   $ 9,100,000 $ 10,200,000 $ 9,700,000