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 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		13.1						13.1
Interest rate swaps		5.8	$ 5.8				$ 5.8
Foreign currency translation adjustment		0.0
Issuance of common stock under stock-based compensation plans		(6.8)			(6.8)
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		22.4			22.4
Balance Ending at Jan. 01, 2022		3,160.9		$ 1.5	2,788.5	0.5		370.4
Balance Ending, shares at Jan. 01, 2022				153,300,000
Balance Beginning at Oct. 02, 2021		3,123.5		$ 1.5	2,764.6	(4.6)		362.0
Balance Beginning, shares at Oct. 02, 2021				152,800,000
Net income		8.4						8.4
Interest rate swaps		5.1	4.7				4.7
Foreign currency translation adjustment		0.4				0.4
Issuance of common stock under stock-based compensation plans		(1.9)			(1.9)
Issuance of common stock under stock-based compensation plans, shares				200,000
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
Stock-based compensation expense		13.5			13.5
Balance Ending at Jan. 01, 2022		3,160.9		$ 1.5	2,788.5	0.5		370.4
Balance Ending, shares at Jan. 01, 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		$ 166.8						166.8
Interest rate swaps		3.9	5.4				5.4
Foreign currency translation adjustment		(1.5)				(1.5)
Issuance of common stock under stock-based compensation plans		(8.7)			(8.7)
Issuance of common stock under stock-based compensation plans, shares				500,000
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		20.7			20.7
Balance Ending at Dec. 31, 2022		$ 3,496.5		$ 1.5	2,843.1	15.3		636.6
Balance Ending, shares at Dec. 31, 2022		154,300,000		154,300,000
Balance Beginning at Oct. 01, 2022		$ 3,400.7		$ 1.5	2,818.4	15.3		565.5
Balance Beginning, shares at Oct. 01, 2022				154,000,000.0
Net income		71.1						71.1
Interest rate swaps		0.0	$ (0.9)				$ (0.9)
Foreign currency translation adjustment		0.9				0.9
Issuance of common stock under stock-based compensation plans		0.3			0.3
Issuance of common stock under stock-based compensation plans, shares				100,000
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		10.1			10.1
Balance Ending at Dec. 31, 2022		$ 3,496.5		$ 1.5	$ 2,843.1	$ 15.3		$ 636.6
Balance Ending, shares at Dec. 31, 2022		154,300,000		154,300,000

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