Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011	Jul. 02, 2011
Components of accumulated other comprehensive income
Unrealized losses on available-for-sale investments, net of tax	$ (2.7)		$ (2.7)		$ (1.6)
Foreign currency translation gains	16.2		16.2		20.0
Defined benefit obligation, net of tax	14.0		14.0		14.4
Accumulated other comprehensive income	27.5		27.5		32.8
Components of comprehensive income (loss), net of tax
Net (loss) income	(17.4)	38.6	(33.4)	62.3
Other comprehensive income (loss):
Net change in unrealized gains (losses) on investments, net of tax	0.5	0.3	(1.1)	(2.6)
Net change in cumulative translation adjustment	2.4	4.3	(3.9)	8.6
Net change in defined benefit obligation, net of tax			(0.4)
Net change in other comprehensive income (loss)	2.9	4.6	(5.4)	6.0
Comprehensive (loss) income	$ (14.5)	$ 43.2	$ (38.8)	$ 68.3