Goodwill and Intangible Assets - Summary of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Gross goodwill balance	$ 870.2	$ 870.3	$ 855.7
Accumulated impairment losses	(140.8)	(126.0)	(126.0)
Goodwill, beginning balance	744.3	729.7
Acquisition		14.8
Write-off goodwill associated with stores sold		(0.2)
Goodwill Impairment	(14.8)	0.0	0.0
Goodwill, ending balance	729.4	744.3	729.7
Operating Segments | Refining
Goodwill [Roll Forward]
Gross goodwill balance	801.3	801.3	801.3
Accumulated impairment losses	(126.0)	(126.0)	(126.0)
Goodwill, beginning balance	675.3	675.3
Acquisition		0.0
Write-off goodwill associated with stores sold		0.0
Goodwill Impairment	0.0
Goodwill, ending balance	675.3	675.3	675.3
Operating Segments | Logistics
Goodwill [Roll Forward]
Gross goodwill balance	27.0	27.0	12.2
Accumulated impairment losses	(14.8)	0.0
Goodwill, beginning balance	27.0	12.2
Acquisition		14.8
Write-off goodwill associated with stores sold		0.0
Goodwill Impairment	(14.8)
Goodwill, ending balance	12.2	27.0	12.2
Operating Segments | Retail
Goodwill [Roll Forward]
Gross goodwill balance	41.9	42.0	42.2
Accumulated impairment losses	0.0	0.0	0.0
Goodwill, beginning balance	42.0	42.2
Acquisition		0.0
Write-off goodwill associated with stores sold		(0.2)
Goodwill Impairment	0.0
Goodwill, ending balance	41.9	42.0	42.2
Corporate, Other and Eliminations
Goodwill [Roll Forward]
Gross goodwill balance	0.0	0.0	0.0
Accumulated impairment losses	0.0	0.0	0.0
Goodwill, beginning balance	0.0	0.0
Acquisition		0.0
Write-off goodwill associated with stores sold		0.0
Goodwill Impairment	0.0
Goodwill, ending balance	$ 0.0	$ 0.0	$ 0.0