Summary of Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2025
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Interim Financial Statements The accompanying interim consolidated financial statements have been prepared in accordance with GAAP. Pursuant to Regulation S-X, certain information and disclosures normally included in the annual consolidated financial statements have been condensed or omitted. The interim consolidated financial statements and notes included herein should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2024 filed with the SEC on February 14, 2025.
Recently Issued Accounting Pronouncements	Significant Accounting Policies As of September 30, 2025, there have been no changes in the Partnership's significant accounting policies from those described in our Annual Report on Form 10-K for the year ended December 31, 2024 filed with the SEC on February 14, 2025
Motor Fuel and Sales Taxes	Certain motor fuel and sales taxes are collected from customers and remitted to governmental agencies either directly by the Partnership or through suppliers. The Partnership’s accounting policy for wholesale direct sales to dealers, distributors and commercial customers is to exclude the collected motor fuel tax from sales and cost of sales. For retail locations where the Partnership holds inventory, including commission agent locations, motor fuel sales and motor fuel cost of sales include motor fuel taxes. Such amounts were $43 million and $33 million for the three months ended September 30, 2025 and 2024, respectively, and $107 million and $133 million for the nine months ended September 30, 2025 and 2024, respectively. Merchandise sales and cost of merchandise sales are reported net of sales tax in our consolidated statements of operations.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2025

Basis of Accounting, Policy [Policy Text Block]

Interim Financial Statements

The accompanying interim consolidated financial statements have been prepared in accordance with GAAP. Pursuant to Regulation S-X, certain information and disclosures normally included in the annual consolidated financial statements have been condensed or omitted. The interim consolidated financial statements and notes included herein should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2024 filed with the SEC on February 14, 2025.

Recently Issued Accounting Pronouncements

Significant Accounting Policies

As of September 30, 2025, there have been no changes in the Partnership's significant accounting policies from those described in our Annual Report on Form 10-K for the year ended December 31, 2024 filed with the SEC on February 14, 2025

Motor Fuel and Sales Taxes

Certain motor fuel and sales taxes are collected from customers and remitted to governmental agencies either directly by the Partnership or through suppliers. The Partnership’s accounting policy for wholesale direct sales to dealers, distributors and commercial customers is to exclude the collected motor fuel tax from sales and cost of sales.

For retail locations where the Partnership holds inventory, including commission agent locations, motor fuel sales and motor fuel cost of sales include motor fuel taxes. Such amounts were $43 million and $33 million for the three months ended September 30, 2025 and 2024, respectively, and $107 million and $133 million for the nine months ended September 30, 2025 and 2024, respectively. Merchandise sales and cost of merchandise sales are reported net of sales tax in our consolidated statements of operations.