Acquired Developed Technology and Other Intangibles (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Apr. 02, 2016	Oct. 03, 2015	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015	Jun. 27, 2015
Acquired developed technology, customer relationships and other intangibles
Gross carrying amount of finite lived intangibles	$ 616.6			$ 616.6		$ 617.1
Accumulated Amortization	(548.0)			(548.0)		(528.3)
Net carrying amount of finite lived intangibles	68.6			68.6		88.8
Net carrying amount of in-process research and development intangibles	0.8			0.8		1.8
Gross Carrying Amount	617.4			617.4		618.9
Net carrying amount of intangibles	69.4			69.4		90.6
Amortization of acquired developed technologies	4.1		$ 9.0	13.0	$ 26.3
Amortization of other intangibles	3.6		4.8	11.1	14.7
Total amortization of intangible assets	7.7		$ 13.8	24.1	$ 41.0
Estimated future amortization expense
Remainder of 2016	7.6			7.6
2017	29.2			29.2
2018	20.8			20.8
2019	9.3			9.3
2020	1.3			1.3
Thereafter	0.4			0.4
Total amortization	68.6			68.6
Acquired developed technology
Acquired developed technology, customer relationships and other intangibles
Gross carrying amount of finite lived intangibles	421.9			421.9		418.9
Accumulated Amortization	(385.1)			(385.1)		(373.6)
Net carrying amount of finite lived intangibles	36.8			36.8		45.3
Transfer from indefinite to finite lived intangible assets		$ 1.8
Useful life		36 months
Customer relationships
Acquired developed technology, customer relationships and other intangibles
Gross carrying amount of finite lived intangibles	175.4			175.4		178.7
Accumulated Amortization	(144.0)			(144.0)		(135.8)
Net carrying amount of finite lived intangibles	31.4			31.4		42.9
Other
Acquired developed technology, customer relationships and other intangibles
Gross carrying amount of finite lived intangibles	19.3			19.3		19.5
Accumulated Amortization	(18.9)			(18.9)		(18.9)
Net carrying amount of finite lived intangibles	$ 0.4			$ 0.4		$ 0.6