Goodwill and Other Intangible Assets - Acquired Developed Technology and Other Intangibles (Details) - USD ($) $ in Millions	Sep. 26, 2015	Jun. 27, 2015
Finite Lived Intangible Assets [Line Items]
Gross carrying amount of finite lived intangibles	$ 112.6	$ 112.6
Accumulated Amortization	(92.6)	(90.8)
Net carrying amount of finite lived intangibles	20.0	21.8
Acquired Developed Technology
Finite Lived Intangible Assets [Line Items]
Gross carrying amount of finite lived intangibles	103.2	103.2
Accumulated Amortization	(84.6)	(82.2)
Net carrying amount of finite lived intangibles	18.6	21.0
Other
Finite Lived Intangible Assets [Line Items]
Gross carrying amount of finite lived intangibles	9.4	9.4
Accumulated Amortization	(8.0)	(8.6)
Net carrying amount of finite lived intangibles	$ 1.4	$ 0.8