Employee Pension and Other Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017
Employee Defined Benefit Plans
Employer contributions			$ 2.3
Components of the net periodic cost for the pension and benefits plans
Cash outlays expected during current fiscal year	$ 7.7		7.7
Pension Benefit Plans
Components of the net periodic cost for the pension and benefits plans
Service cost	0.1	$ 0.0	0.1	$ 0.0
Interest cost	0.6	0.7	1.2	1.4
Expected return on plan assets	(0.4)	(0.4)	(0.8)	(0.8)
Amortization of net actuarial losses	0.4	0.5	1.0	0.9
Net periodic benefit cost	$ 0.7	$ 0.8	1.5	$ 1.5
UNITED KINGDOM
Employee Defined Benefit Plans
Employer contributions			$ 0.7