CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 13.0	$ (1.1)	$ (2.3)	$ (8.7)
Other comprehensive income (loss):
Net change in cumulative translation adjustment, net of tax	(13.0)	7.0	(26.1)	17.3
Net change in available-for-sale investments, net of tax:
Unrealized holding (loss) gain arising during period	0.0	(0.4)	0.2	(0.4)
Plus: reclassification adjustments included in net income	0.2	0.0	0.4	0.0
Net change in defined benefit obligation, net of tax:
Amortization of actuarial losses	0.4	0.5	1.0	0.9
Net change in accumulated other comprehensive (loss) income	(12.4)	7.1	(24.5)	17.8
Comprehensive income (loss)	$ 0.6	$ 6.0	$ (26.8)	$ 9.1