CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 32.4	$ (13.2)	$ (28.3)	$ (48.0)
Other comprehensive income (loss):
Net change in cumulative translation adjustment, net of tax	3.4	(27.1)	(18.4)	(63.0)
Net change in available-for-sale investments, net of tax:
Unrealized holding gains (losses) arising during period	48.5	0.1	201.6	(0.4)
Less: reclassification adjustments included in Net income (loss)	(38.8)		(38.8)	0.0
Net change in defined benefit obligation, net of tax:
Amortization of actuarial losses	0.2	0.1	0.5	0.4
Net change in Accumulated other comprehensive income (loss)	13.3	(26.9)	144.9	(63.0)
Comprehensive income (loss)	$ 45.7	$ (40.1)	$ 116.6	$ (111.0)