Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating Revenues
Total operating revenues		$ 19,384.0	$ 20,244.3	$ 21,529.4
Operating Expenses
Store and other operating expenses		1,108.5	1,064.6	1,014.8
Depreciation and amortization		276.8	248.0	228.7
Impairment of properties		5.3	8.2	0.0
Selling, general and administrative		231.5	235.4	240.5
Restructuring expense		12.6	0.0	0.0
Accretion of asset retirement obligations		3.4	3.2	3.0
Total operating expenses		18,662.7	19,496.9	20,702.6
Gain (loss) on sale of assets		(2.8)	(4.5)	(0.8)
Income (loss) from operations		718.5	742.9	826.0
Other income (expense)
Investment (income) loss		0.2	6.4	6.9
Interest expense		(110.9)	(97.1)	(98.5)
Other nonoperating income (expense)		1.4	(0.6)	0.0
Total other income (expense)		(109.3)	(91.3)	(91.6)
Income before income taxes		609.2	651.6	734.4
Income tax expense (benefit)		138.6	149.1	177.6
Net Income		$ 470.6	$ 502.5	$ 556.8
Basic and Diluted Earnings Per Common Share:
Basic (in dollars per share)		$ 24.38	$ 24.47	$ 25.91
Diluted (in dollars per share)		$ 24.10	$ 24.11	$ 25.49
Weighted-average shares outstanding (in thousands):
Basic (in shares)		19,303	20,533	21,493
Diluted (in shares)		19,526	20,842	21,843
Supplemental information:
Includes excise taxes		$ 2,366.1	$ 2,334.9	$ 2,291.2
Petroleum product sales
Operating Revenues
Total operating revenues	[1]	14,862.8	15,891.8	17,104.4
Operating Expenses
Cost of goods sold	[1]	13,589.8	14,556.4	15,929.7
Merchandise sales
Operating Revenues
Total operating revenues		4,303.8	4,214.8	4,089.3
Operating Expenses
Cost of goods sold		3,434.8	3,381.1	3,285.9
Other operating revenues
Operating Revenues
Total operating revenues		$ 217.4	$ 137.7	$ 335.7

[1] Includes excise taxes of $2,366.1 million, $2,334.9 million and $2,291.2 million for the years ended December 31, 2025, 2024 and 2023, respectively.