Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Contract with Customer, Asset, Net	$ 55	$ 51
Contract with Customer, Liability	317
Contract with Customer, Liability, Revenue Recognized	42
Contract with Customer, Asset, Reclassified to Receivable	4
Increase (Decrease) in Accounts Receivable	(52)
Contract with Customer, Liability	1	1
Receivables from Customers	393	$ 445
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Modification of Contract	0
Sunoco LP [Member]
Capitalized Contract Cost, Amortization	$ 3