Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Mar. 30, 2013	Mar. 30, 2013 Unrealized gains (losses) on available-for-sale investments	Mar. 30, 2013 Unrealized gains (losses) on available-for-sale investments Amount reclassified from accumulated other comprehensive income	Mar. 30, 2013 Foreign currency translation adjustments	Mar. 30, 2013 Defined benefit obligation, net of tax	Jun. 30, 2012 Defined benefit obligation, net of tax
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ 7.5	$ (2.8)		$ 10.6	$ (0.3)	$ (0.3)
Other comprehensive income before reclassification	3.6	0.4		3.2
Amounts reclassified from accumulated other comprehensive income	(0.4)	(0.4)
Net change in other comprehensive income (loss)	3.2			3.2
Balance at the end of the period	10.7	(2.8)		13.8	(0.3)	(0.3)
Realized gain on the sale of available-for-sale securities			0.4
Additional disclosures
Tax impact on the sale of available-for-sale investments	$ 0