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Revenue (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Deferred Revenue $ 378    
Contract with Customer, Liability, Revenue Recognized 76 $ 35  
Increase (Decrease) in Accounts Receivable 302 (907)  
Sunoco LP [Member]      
Contract with Customer, Asset, Net 84   $ 75
Capitalized Contract Cost, Amortization 4 $ 3  
Receivables from Customers 467   348
Contract with Customer, Liability $ 1   $ 1