Employee Pension and Other Benefit Plans - Net Periodic Benefit Cost (Details) - Pension Benefit Plans - USD ($) $ in Millions	12 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jul. 01, 2017
Components of the net periodic cost for the pension and benefits plans
Service cost	$ 0.2	$ 0.2	$ 0.3
Interest cost	2.5	2.7	2.1
Expected return on plan assets	(1.6)	(1.5)	(1.1)
Recognized net actuarial losses	1.8	1.5	1.9
Net periodic cost	$ 2.9	$ 2.9	$ 3.2