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Number of shares of equity interests issued or issuable to acquire entity.

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Acquisitions and Related Transactions Acquisitions (2015 Transactions) (Details) $ in Millions, gallons in Billions	1 Months Ended						3 Months Ended	12 Months Ended
	Feb. 28, 2018 shares	Feb. 28, 2017	Oct. 31, 2015 USD ($) shares	Jul. 31, 2015 USD ($) shares	Apr. 30, 2015 USD ($) gallons shares	Mar. 31, 2015 USD ($) shares	Mar. 31, 2015 USD ($) shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross \| $			$ 382
Class H Units [Member]
Business Acquisition [Line Items]
Allocation of Profits, Losses and Other by Sunoco, Percent											90.05%
Partners' Capital Account, Units						50,200,000	50,200,000
Class B Units [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares			9,400,000
Dropdown of Sunoco LLC Interest [Member]
Business Acquisition [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage					31.58%
Business Combination, Consideration Transferred \| $					$ 816
Gallons of motor fuel distributed \| gallons					5.3
Payments to Acquire Businesses, Gross \| $					$ 775
Equity Issued in Business Combination, Fair Value Disclosure \| $					$ 41
Dropdown of Susser [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross \| $				$ 970
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable \| $				$ 970
Sunoco LP Exchange [Member]
Business Acquisition [Line Items]
Stock Repurchased During Period, Shares				31,500,000
IDR Subsidies \| $				$ 35
Term of IDR Subsidy				10 years
Bakken Pipeline Transaction [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred \| $						$ 879
Partners' Capital Account, Units, Redeemed						46,200,000
Class I Distributions \| $							$ 55					$ 30
Bakken Pipeline Transaction [Member] \| Class H Units [Member]
Business Acquisition [Line Items]
Allocation of Profits, Losses and Other by Sunoco, Percent						90.05%	90.05%
Partners' Capital Account, Units, Redeemed						30,800,000
Bakken Pipeline Transaction [Member] \| Class I Units [Member]
Business Acquisition [Line Items]
Partners' Capital Account, Units						100	100
Regency Merger [Member]
Business Acquisition [Line Items]
Business Acquisition, Number Of Share Received In Exchange Of Each Share					0.6186
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares					258,300,000
Relinquishment of Incentive Distributions \| $											$ 60		$ 80
Susser [Member] \| Dropdown of Susser [Member]
Business Acquisition [Line Items]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest				100.00%
Sunoco LP [Member] \| Dropdown of Susser [Member]
Business Acquisition [Line Items]
Sale of Stock, Number of Shares Issued in Transaction				22,000,000
Sunoco LP [Member] \| Dropdown of Susser [Member] \| Class A Units [Member]
Business Acquisition [Line Items]
Sale of Stock, Number of Shares Issued in Transaction				79,308
Sunoco GP [Member] \| Sunoco LP Exchange [Member]
Business Acquisition [Line Items]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest				100.00%
Bakken Holdings Company LLC [Member]
Business Acquisition [Line Items]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest			40.00%
Dakota Access and ETCOC [Member]
Business Acquisition [Line Items]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest			75.00%
ETP [Member] \| Sunoco LP [Member] \| Dropdown of Susser [Member]
Business Acquisition [Line Items]
Sale of Stock, Number of Shares Issued in Transaction				10,900,000
ETP [Member] \| Bakken Holdings Company LLC [Member]
Business Acquisition [Line Items]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest		100.00%
Parent Company [Member] \| Bakken Pipeline Transaction [Member]
Business Acquisition [Line Items]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest						45.00%
ETP Subsidiaries [Member] \| Regency Merger [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares					23,300,000
ETP Series A Preferred Units [Member] \| Regency Merger [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares					1,900,000
Subsequent Event [Member]
Business Acquisition [Line Items]
Relinquishment of Incentive Distributions \| $								$ 33	$ 128	$ 153
Subsequent Event [Member] \| Regency Merger [Member]
Business Acquisition [Line Items]
Relinquishment of Incentive Distributions \| $								$ 320
Subsequent Event [Member] \| Sunoco LP [Member]
Business Acquisition [Line Items]
Stock Repurchased During Period, Shares	17,286,859