Revenues - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 19,384.0	$ 20,244.3	$ 21,529.4
Merchandise sales
Disaggregation of Revenue [Line Items]
Revenue	4,303.8	4,214.8	4,089.3
Operating segments | Marketing
Disaggregation of Revenue [Line Items]
Revenue	19,383.5	20,243.7	21,528.9
Operating segments | Marketing | Total petroleum product sales
Disaggregation of Revenue [Line Items]
Revenue	14,862.8	15,891.8	17,104.4
Operating segments | Marketing | Petroleum product sales (at retail)
Disaggregation of Revenue [Line Items]
Revenue	13,397.7	14,417.5	15,279.9
Operating segments | Marketing | Petroleum product sales (at wholesale)
Disaggregation of Revenue [Line Items]
Revenue	1,465.1	1,474.3	1,824.5
Operating segments | Marketing | Merchandise sales
Disaggregation of Revenue [Line Items]
Revenue	4,303.8	4,214.8	4,089.3
Operating segments | Marketing | RINs
Disaggregation of Revenue [Line Items]
Revenue	211.7	129.6	328.6
Operating segments | Marketing | Other revenues
Disaggregation of Revenue [Line Items]
Revenue	5.2	7.5	6.6
Corporate and Other Assets
Disaggregation of Revenue [Line Items]
Revenue	$ 0.5	$ 0.6	$ 0.5