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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Balance Type:
Period Type:

Stock-based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions		9 Months Ended	12 Months Ended
	Sep. 01, 2021 USD ($) $ / shares shares	Apr. 02, 2022	Jun. 29, 2024 USD ($) Tranche $ / shares shares	Jul. 01, 2023 USD ($) shares	Jul. 02, 2022 USD ($) shares	Jul. 03, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			$ (41.9)	$ (43.3)	$ (44.0)
Stock compensation expense			$ 41.9	43.4	44.0
Dividend Yield			0.00%
Income tax benefit			$ (160.9)	(146.8)	(54.6)
2007 Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term of options granted			10 years
Number of Tranches \| Tranche			3
Intrinsic value of exercised options			$ 4.3	$ 3.6	$ 2.4
2007 Option Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense						$ 0.1
2015 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term of options granted			10 years
Options approved for grant \| shares			0	0	0
Stock compensation expense			$ 36.0	$ 34.4	$ 27.6
Intrinsic value of exercised options			$ 0.6	1.8	0.8
Common stock reserved for issuance \| shares			8,850,000
Number of shares available for grant \| shares			3,521,349
Income tax benefit			$ (9.7)	(9.3)	(7.4)
Unrecognized compensation cost			$ 45.0
Compensation expense, period for recognition			1 year 8 months 12 days
Fair value of shares vested			$ 60.2	32.0	21.7
Granted \| shares			677,041
Fair Value of Awards Granted \| $ / shares			$ 64.38
2015 Incentive Plan [Member] \| Performance-based Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period			3 years
2015 Incentive Plan [Member] \| Performance relative to the ROIC and Relative TSR goals \| Minimum [Member] \| Performance-based Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation arrangement by Share-based payment award, annual award vesting rights			0.00%
2015 Incentive Plan [Member] \| Performance relative to the ROIC and Relative TSR goals \| Maximum [Member] \| Performance-based Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation arrangement by Share-based payment award, annual award vesting rights			200.00%
Core-Mark 2010 \| 2019 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense			$ 1.4	4.8	12.7
Fair value of shares vested			5.0	9.6	14.3
Core-Mark 2010 \| 2019 Long Term Incentive Plan [Member] \| Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares vested	$ 30.4
Granted \| shares	614,056
Fair Value of Awards Granted \| $ / shares	$ 49.55
Core-Mark 2010 \| 2019 Long Term Incentive Plan [Member] \| Tranche I [Member] \| Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares vested	$ 9.2
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount on purchases of common stock		15.00%
Stock-based compensation expense			$ 4.5	$ 4.2	$ 3.7
Common stock reserved for issuance \| shares			5,000,000
Number of shares available for grant \| shares			3,112,765