UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 29, 2020	Mar. 31, 2019	Mar. 29, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (61.4)	$ (227.7)	$ (151.7)	$ (241.3)
Other comprehensive loss:
Currency translation gain (loss)	0.0	(0.3)	0.0	(0.8)
Net unrealized (loss) gain on available-for-sale securities	(1.9)	2.0	(1.7)	2.8
Comprehensive loss	(63.3)	(226.0)	(153.4)	(239.3)
Net income attributable to noncontrolling interest	0.2	0.1	0.5	0.1
Comprehensive loss attributable to controlling interest	$ (63.5)	$ (226.1)	$ (153.9)	$ (239.4)