CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (32.8)	$ (4.8)	$ 2.0	$ (7.1)
Other comprehensive income (loss):
Net change in cumulative translation adjustment, net of tax	(33.7)	11.6	(33.1)	(14.5)
Net change in available-for-sale investments, net of tax:
Unrealized holding gain arising during period	(0.1)	0.1	(0.1)	0.3
Plus: reclassification adjustments included in net loss	0.0	0.0	0.0	0.4
Net change in defined benefit obligation, net of tax:
Amortization of actuarial losses	0.7	0.5	2.2	1.5
Net change in accumulated other comprehensive (loss) income	(33.1)	12.2	(31.0)	(12.3)
Comprehensive (loss) income	$ (65.9)	$ 7.4	$ (29.0)	$ (19.4)