Equity (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Sep. 30, 2025 |
Dec. 31, 2025 |
|
| Schedule of Partners' Capital [Line Items] | ||||
| Foreign currency translation adjustment | $ (16) | $ (6) | ||
| Total AOCI included in partners’ capital, net of tax | $ (16) | $ (6) | ||
| Preferred Units, Issued | 1,500,000 | 1,500,000 | ||
| Series A Preferred Units | ||||
| Schedule of Partners' Capital [Line Items] | ||||
| Preferred Units, Issued | 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 | |||
| Common Units | ||||
| Schedule of Partners' Capital [Line Items] | ||||
| Limited Partners' Capital Account, Units Outstanding | 108,430,787 | |||
| Common Units [Member] | ||||
| Schedule of Partners' Capital [Line Items] | ||||
| Limited Partners' Capital Account, Units Outstanding | 136,894,754 | 136,866,854 | ||
| CASH DISTRIBUTION PER COMMON UNIT | $ 0.9899 | $ 0.8976 | ||
| Class C Units [Member] | ||||
| Schedule of Partners' Capital [Line Items] | ||||
| Limited Partners' Capital Account, Units Outstanding | 16,410,780 | 16,410,780 | ||
| CASH DISTRIBUTION PER COMMON UNIT | $ 0.8682 | |||
| Other Allocation Percentage, Distribution | 100.00% | |||
| 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). | |||
| Class D Units | ||||
| Schedule of Partners' Capital [Line Items] | ||||
| Limited Partners' Capital Account, Units Outstanding | 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. | |||
| Energy Transfer | Common Units [Member] | ||||
| Schedule of Partners' Capital [Line Items] | ||||
| Limited Partners' Capital Account, Units Outstanding | 28,463,967 | |||