Employee Pension and Other Benefit Plans - Net Periodic Benefit Cost (Details) - Pension Benefit Plans - USD ($) $ in Millions	12 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
Components of the net periodic cost for the pension and benefits plans
Service cost	$ 0.3	$ 0.2	$ 0.2
Interest cost	1.9	2.5	2.7
Expected return on plan assets	(1.5)	(1.6)	(1.5)
Recognized net actuarial losses	2.8	1.8	1.5
Net periodic cost	$ 3.5	$ 2.9	$ 2.9