Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions		Total	Interest Rate Swaps [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Accumulated Other Comprehensive (Loss) Income [Member] Interest Rate Swaps [Member]	Retained Earnings [Member]
Balance Beginning at Jan. 01, 2021		$ 3,160.9		$ 1.5	$ 2,788.5	$ 0.5		$ 370.4
Balance Beginning, shares at Jan. 01, 2021				153,300,000
Net income		23.4						23.4
Interest rate swaps			$ 11.2				$ 11.2
Foreign currency translation adjustment		0.4				0.4
Issuance of common stock under stock-based compensation plans		(1.2)			(1.2)
Stock-based compensation expense		9.8			9.8
Balance Ending at Apr. 02, 2022		3,204.5		$ 1.5	2,797.1	12.1		393.8
Balance Ending, shares at Apr. 02, 2022				153,300,000
Balance Beginning at Jul. 03, 2021		2,106.1		$ 1.3	1,752.8	(5.3)		357.3
Balance Beginning, shares at Jul. 03, 2021				132,500,000
Net income		36.5						36.5
Interest rate swaps		17.4	17.0				17.0
Foreign currency translation adjustment		0.4
Issuance of common stock under stock-based compensation plans		(8.0)			(8.0)
Issuance of common stock under stock-based compensation plans, shares				600,000
Issuance of common stock under employee stock purchase plan		12.3			12.3
Issuance of common stock under employee stock purchase plan, shares				300,000
Conversion of Core-Mark shares of common stock		998.8		$ 0.2	998.6
Conversion of Core-Mark shares of common stock, shares				19,900,000
Conversion of Core-Mark stock-based compensation	[1]	9.2			9.2
Stock-based compensation expense		32.2			32.2
Balance Ending at Apr. 02, 2022		3,204.5		$ 1.5	2,797.1	12.1		393.8
Balance Ending, shares at Apr. 02, 2022				153,300,000
Balance Beginning at Jul. 02, 2022		$ 3,299.5		$ 1.5	2,816.8	11.4		469.8
Balance Beginning, shares at Jul. 02, 2022		153,600,000		153,600,000
Net income		$ 247.1						247.1
Interest rate swaps		0.5	1.6				1.6
Foreign currency translation adjustment		(1.1)				(1.1)
Issuance of common stock under stock-based compensation plans		(9.7)			(9.7)
Issuance of common stock under stock-based compensation plans, shares				700,000
Issuance of common stock under employee stock purchase plan		14.3			14.3
Issuance of common stock under employee stock purchase plan, shares				200,000
Stock-based compensation expense		30.0			30.0
Balance Ending at Apr. 01, 2023		$ 3,581.7		$ 1.5	2,851.4	11.9		716.9
Balance Ending, shares at Apr. 01, 2023		154,500,000		154,500,000
Balance Beginning at Dec. 31, 2022		$ 3,496.5		$ 1.5	2,843.1	15.3		636.6
Balance Beginning, shares at Dec. 31, 2022				154,300,000
Net income		80.3						80.3
Interest rate swaps		(3.4)	$ (3.8)				$ (3.8)
Foreign currency translation adjustment		0.4				0.4
Issuance of common stock under stock-based compensation plans		(1.0)			(1.0)
Issuance of common stock under stock-based compensation plans, shares				200,000
Stock-based compensation expense		9.3			9.3
Balance Ending at Apr. 01, 2023		$ 3,581.7		$ 1.5	$ 2,851.4	$ 11.9		$ 716.9
Balance Ending, shares at Apr. 01, 2023		154,500,000		154,500,000

[1] Represents the portion of replacement stock-based compensation awards that relates to pre-combination vesting.