CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (15.3)	$ (7.6)
Other comprehensive (loss) income:
Net change in cumulative translation adjustment, net of tax	(13.1)	10.3
Net change in available-for-sale investments, net of tax:
Unrealized holding gain arising during period	0.1	0.0
Plus: reclassification adjustments included in net income	0.2	0.0
Net change in defined benefit obligation, net of tax:
Amortization of actuarial losses	0.6	0.4
Net change in accumulated other comprehensive (loss) income	(12.2)	10.7
Comprehensive (loss) income	$ (27.5)	$ 3.1