Inventories - Schedule of Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Inventory Disclosure [Abstract]
Petroleum products - FIFO basis	$ 305.8	$ 353.3
Store merchandise for resale - FIFO basis	254.7	226.5
Less LIFO reserve	(162.6)	(189.1)
Total petroleum products and store merchandise inventory	397.9	390.7
Materials and supplies	15.1	10.9
Total inventories	$ 413.0	$ 401.6