Acquired Developed Technology and Other Intangibles (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Dec. 31, 2016	Jan. 02, 2016	Jul. 02, 2016
Acquired developed technology, customer relationships and other intangibles
Gross carrying amount of finite lived intangibles	$ 470.8		$ 470.8		$ 475.7
Accumulated Amortization	(426.4)		(426.4)		(415.8)
Net carrying amount of finite lived intangibles	44.4		44.4		59.9
Amortization of acquired developed technologies	3.7	$ 4.6	7.5	$ 8.9
Amortization of other intangibles	3.4	3.7	6.9	7.5
Total amortization of intangible assets	7.1	$ 8.3	14.4	$ 16.4
Estimated future amortization expense
Remainder of 2017	13.6		13.6
2018	19.8		19.8
2019	9.3		9.3
2020	1.4		1.4
2021	0.3		0.3
Thereafter	0.0		0.0
Total amortization	44.4		44.4
Acquired developed technology
Acquired developed technology, customer relationships and other intangibles
Gross carrying amount of finite lived intangibles	365.5		365.5		369.3
Accumulated Amortization	(341.8)		(341.8)		(337.3)
Net carrying amount of finite lived intangibles	23.7		23.7		32.0
Customer relationships
Acquired developed technology, customer relationships and other intangibles
Gross carrying amount of finite lived intangibles	94.5		94.5		95.6
Accumulated Amortization	(74.1)		(74.1)		(68.0)
Net carrying amount of finite lived intangibles	20.4		20.4		27.6
Other
Acquired developed technology, customer relationships and other intangibles
Gross carrying amount of finite lived intangibles	10.8		10.8		10.8
Accumulated Amortization	(10.5)		(10.5)		(10.5)
Net carrying amount of finite lived intangibles	$ 0.3		$ 0.3		$ 0.3