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Related Party Transactions - Sale Leaseback (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Apr. 01, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]        
Financing receivables – related parties $ 300,000,000 $ 300,000,000   $ 0
April 2020 Transaction        
Related Party Transaction [Line Items]        
Contract asset - related parties       $ 0
April 2020 Transaction | Norco Transaction        
Related Party Transaction [Line Items]        
Financing receivables – related parties     $ 302,000,000  
April 2020 Transaction | Affiliated Entity | Norco Transaction        
Related Party Transaction [Line Items]        
Contract asset - related parties     $ 244,000,000  
April 2020 Transaction | Terminaling Services | Affiliated Entity        
Related Party Transaction [Line Items]        
Interest income 8,000,000 15,000,000    
Reduction in financing receivables 1,000,000 2,000,000    
Proceeds from interest income 7,000,000 12,000,000    
Proceeds from principal repayments 1,000,000 2,000,000    
April 2020 Transaction | Terminaling Services | Affiliated Entity | Norco Transaction        
Related Party Transaction [Line Items]        
Annual payments receivable 140,000,000 140,000,000    
Annual payments receivable, gross 151,000,000 151,000,000    
Annual payments receivable, net $ 11,000,000 $ 11,000,000    
April 2020 Transaction | Terminaling Services | Affiliated Entity | Shell Oil Products (SOPUS)        
Related Party Transaction [Line Items]        
Financing receivable, imputed interest rate   11.10%    
April 2020 Transaction | Terminaling Services | Affiliated Entity | Shell Chemical        
Related Party Transaction [Line Items]        
Financing receivable, imputed interest rate   7.40%