CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ 6.3	$ (25.1)	$ (60.7)	$ (34.8)
Other comprehensive income (loss):
Net change in cumulative translation adjustment, net of tax	(11.8)	(17.4)	(21.8)	(35.9)
Net change in available-for-sale investments, net of tax:
Unrealized holding gains (losses) arising during period	71.4	(0.3)	153.1	(0.5)
Net change in defined benefit obligation, net of tax:
Amortization of actuarial losses	0.1	0.2	0.3	0.3
Net change in Accumulated other comprehensive income (loss)	59.7	(17.5)	131.6	(36.1)
Comprehensive income (loss)	$ 66.0	$ (42.6)	$ 70.9	$ (70.9)