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Related-Party Transactions - Additional Information (Details) $ in Millions		3 Months Ended
	Sep. 25, 2012 store	Mar. 31, 2017 USD ($) agreement $ / gal	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 store
Related Party Transaction [Line Items]
Related products purchase agreements | agreement		2
Purchase agreements renewal term		12 months
Advances from affiliates		$ 1		$ 87
Repayment of Line of credit		857	$ 447
Receivables from affiliates		13		3
Accounts payable to affiliates		111		109
Motor fuel sales to affiliates		$ 21	7
Philadelphia Energy Solutions Refining and Marketing [Member]
Related Party Transaction [Line Items]
Related products purchase agreements | agreement		1
Merrill Lynch Commodities [Member]
Related Party Transaction [Line Items]
Related products purchase agreements | agreement		1
Susser [Member]
Related Party Transaction [Line Items]
Distribution agreement term		10 years
Profit margin | $ / gal		0.03
Purchase option term	3 years
Number of convenience stores | store	75
Commercial agreement, initial term	15 years
Exclusive distributor, term	10 years
Number of convenience stores, sale lease back transactions completed | store					75
Sunoco Retail LLC [Member]
Related Party Transaction [Line Items]
Distribution agreement term		10 years
Profit margin | $ / gal		0.04
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Receivables from affiliates		$ 13		3
Accounts payable to affiliates		111		109
Motor fuel sales to affiliates		21	7
Bulk fuel purchase from affiliates		545	$ 340
Affiliated Entity [Member] | Sunoco LLC [Member]
Related Party Transaction [Line Items]
Advances from affiliates		$ 1		$ 87

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