Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Jun. 27, 2015
Schedule of Equity Method Investments [Line Items]
Unrealized loss on equity method investments	$ (4.1)
Loss from Equity Method Investments		$ (3.1)
Unrealized Gain (Loss) on Investments [Abstract]
Equity securities, at cost less impairments	17.1		$ 17.1
Gross unrealized gains	10.6		5.7
Gross unrealized losses	(11.2)		(10.1)
Estimated fair value of equity securities	16.5		12.7
Other Noncurrent Assets [Member]
Schedule of Equity Method Investments [Line Items]
Cost Method Investments	6.9		6.8
Equity Method Investments	$ 48.5		$ 48.9