Employee Pension and Other Benefit Plans - Amounts Recognized on Financial Statements (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jun. 27, 2020
Amount recognized in the Consolidated Balance Sheets at end of year:
Non-current liabilities	$ 59.6	$ 97.0
Other changes in plan assets and benefit obligations recognized in other comprehensive (loss) income:
Net actuarial gain	13.9	4.1	$ (5.4)
Amortization of accumulated net actuarial losses	2.9	3.1	$ 2.8
Pension Benefit Plans
Amount recognized in the Consolidated Balance Sheets at end of year:
Current liabilities	7.0	7.9
Non-current liabilities	59.2	96.4
Net amount recognized at end of year	66.2	104.3
Amount recognized in accumulated other comprehensive (loss) income at end of year:
Actuarial losses, net of tax	(7.2)	(24.0)
Net amount recognized at end of year	(7.2)	(24.0)
Other changes in plan assets and benefit obligations recognized in other comprehensive (loss) income:
Net actuarial gain	13.9	4.1
Amortization of accumulated net actuarial losses	2.9	3.1
Total recognized in other comprehensive income (loss)	$ 16.8	$ 7.2