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Partners' Capital - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Nov. 19, 2025
Aug. 19, 2025
May 20, 2025
Feb. 19, 2025
Nov. 19, 2024
Aug. 19, 2024
May 20, 2024
Feb. 20, 2024
Nov. 20, 2023
Aug. 22, 2023
May 22, 2023
Feb. 21, 2023
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Schedule of Partners' Capital [Line Items]                                
Limited partner interest, units outstanding (in units)                         51,517,198 51,517,198    
Preferred Units, Issued                         1,500,000 1,500,000    
Proceeds from Issuance of Preferred Stock and Preference Stock                           $ 1,473 $ 0 $ 0
Per Unit Distribution (in dollars per unit) $ 0.9202 $ 0.9088 $ 0.8976 $ 0.8865 $ 0.8756 $ 0.8756 $ 0.8756 $ 0.8420 $ 0.8420 $ 0.8420 $ 0.8420 $ 0.8255        
CASH DISTRIBUTION PER COMMON UNIT                           $ 3.6583 $ 3.5133 $ 3.3680
Preferred Units, Description                           In September 2025, the Partnership closed a private offering of 1.5 million of its 7.875% Series A Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Units (the “Series A Preferred Units”) at an offering price of $1,000 per unit. The Partnership received net proceeds of approximately $1.47 billion from the sale of the Series A Preferred Units after deducting the initial purchasers' discount and other estimated offering expenses. The Partnership used the net proceeds from this private offering (i) on the closing date of the Parkland Acquisition to fund a portion of the cash consideration for the Parkland Acquisition, and (ii) prior to the closing date of the Parkland Acquisition, to temporarily reduce the borrowings outstanding under the Partnership's Credit Facility and to pay interest and fees in connection therewith.Distributions on the Series A Preferred Units will be cumulative from the date of original issuance and will be payable semi-annually in arrears commencing on March 18, 2026, when, as, and if declared by Sunoco GP LLC out of legally available funds for such purpose. An initial distribution on the Series A Preferred Units will be paid on March 18, 2026 in an amount equal to approximately $39.38 per Series A Preferred Unit.    
Distributions Made to Limited Partner, by Distribution                          
Cash distributions paid or to be paid with respect to Sunoco common units and Class D Units were as follows: 
 Limited Partners 
Period EndedRecord DatePayment DatePer Unit DistributionDistributions on Common UnitsDistributions on Class D UnitsDistribution to IDR Holders
December 31, 2022February 7, 2023February 21, 2023$0.8255 $69 $— $18 
March 31, 2023May 8, 2023May 22, 20230.8420 71 — 19 
June 30, 2023August 14, 2023August 21, 20230.8420 71 — 19 
September 30, 2023October 30, 2023November 20, 20230.8420 71 — 19 
December 31, 2023February 7, 2024February 20, 20240.8420 71 — 19 
March 31, 2024May 13, 2024May 20, 20240.8756 119 — 36 
June 30, 2024August 9, 2024August 19, 20240.8756 119 — 36 
September 30, 2024November 8, 2024November 19, 20240.8756 119 — 36 
December 31, 2024February 7, 2025February 19, 20250.8865 121 — 37 
March 31, 2025May 9, 2025May 20, 20250.8976 122 — 39 
June 30, 2025August 8, 2025August 19, 20250.9088 124 — 41 
September 30, 2025October 30, 2025November 19, 20250.9202 126 — 42 
December 31, 2025February 6, 2026February 19, 20260.9317 128 48 60 
    
Energy Transfer Operating [Member]                                
Schedule of Partners' Capital [Line Items]                                
Percentage of membership interest                           13.90%    
Class C Units [Member]                                
Schedule of Partners' Capital [Line Items]                                
Distribution made to limited partner other certain allocation percentage                         1.00% 1.00%    
CASH DISTRIBUTION PER COMMON UNIT                         $ 0.8682      
Series A Preferred Units                                
Schedule of Partners' Capital [Line Items]                                
Preferred Units, Issued                         1,500,000 1,500,000    
Preferred Stock, Dividend Rate, Percentage                           7.875%    
Proceeds from Issuance of Preferred Stock and Preference Stock                           $ 1,470    
Shares Issued, Price Per Share                         $ 1,000 $ 1,000    
Per Unit Distribution (in dollars per unit)                           $ 39.38    
Class C Units Subsidiary [Member]                                
Schedule of Partners' Capital [Line Items]                                
Limited partner interest, units outstanding (in units)                         16,410,780 16,410,780 16,410,780  
Common Units [Member]                                
Schedule of Partners' Capital [Line Items]                                
Limited partner interest, units outstanding (in units)                         136,866,854 136,866,854 136,228,535 84,408,014
Class D Units                                
Schedule of Partners' Capital [Line Items]                                
Limited partner interest, units outstanding (in units)                         51,517,198 51,517,198    
Units of Partnership Interest, Description                           Class D Units (i) except as required by law and in addition to the voting rights established in the Partnership Agreement, are entitled to vote; (ii) shall represent limited partnership interests and common unit interests in the Partnership and shall be economically equivalent to other Partnership common units and no distribution may be made in respect of the Partnership’s common units unless an equal distribution is simultaneously made on the Class D Units; and (iii) provide dividend equalization rights for the period beginning on October 31, 2025 and ending December 31, 2027 (the “Equalization Period”), the Partnership shall ensure that SunocoCorp shall have cash necessary and sufficient to pay distributions on each SunocoCorp common unit for each quarter during the Equalization Period in an amount equal to 100% of the distributions paid by the Partnership on each Sunoco common unit during such quarter.    
Class C Units [Member]                                
Schedule of Partners' Capital [Line Items]                                
Units of Partnership Interest, Description                           Class C Units (i) are not convertible or exchangeable into Common Units or any other units of the Partnership and are non-redeemable; (ii) are entitled to receive distributions of available cash of the Partnership (other than available cash derived from or attributable to any distribution received by the Partnership from Sunoco Retail, the proceeds of any sale of the membership interests of Sunoco Retail, or any interest or principal payments received by the Partnership with respect to indebtedness of Sunoco Retail or its subsidiaries) at a fixed rate equal to $0.8682 per quarter for each Class C Unit outstanding; (iii) do not have the right to vote on any matter except as otherwise required by any non-waivable provision of law; (iv) are not allocated any items of income, gain, loss, deduction or credit attributable to the Partnership’s ownership of, or sale or other disposition of, the membership interests of Sunoco Retail, or the Partnership’s ownership of any indebtedness of Sunoco Retail or any of its subsidiaries (“Sunoco Retail Items”); (v) will be allocated gross income (other than from Sunoco Retail Items) in an amount equal to the cash distributed to the holders of Class C Units and (vi) will be allocated depreciation, amortization and cost recovery deductions as if the Class C Units were Common Units and 1% of certain allocations of net termination gain (other than from Sunoco Retail Items).    
Common Units Affiliated [Member]                                
Schedule of Partners' Capital [Line Items]                                
Common units outstanding (in units)                         28,463,967 28,463,967    
Common Units - Public [Member]                                
Schedule of Partners' Capital [Line Items]                                
Common units outstanding (in units)                         108,402,887 108,402,887    
Incentive Distribution Rights [Member] | Energy Transfer Operating [Member]                                
Schedule of Partners' Capital [Line Items]                                
Percentage of membership interest                           100.00%