Non Operating Loss (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 29, 2012
Other Nonoperating Income (Expense) [Abstract]
Loss on prepayment of long-term debt	$ 0	$ (33.2)	$ 0
Impairment of cost-method investments	0	(10.8)	0
Impairment of investments in joint venture	0	(6.4)	0
Gain on sale of securities available-for-sale	0	9.0	0
Net income related to intellectual property matters	4.3	0.6	11.1
Equity investment income	0	0.1	0.4
Non-operating income(loss)	$ 4.3	$ (40.7)	$ 11.5