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Acquired Developed Technology and Other Intangibles (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017	Jul. 01, 2017
Acquired developed technology, customer relationships and other intangibles
Gross Carrying Amount					$ 474.1
Accumulated Amortization	$ (473.6)		$ (473.6)		(443.0)
Net	256.3		256.3		31.1
Gross Carrying Amount	738.9		738.9
Net	265.3		265.3		31.1
Cost of revenues	6.2	$ 3.6	14.4	$ 11.1
Operating expenses	4.5	3.5	11.0	10.4
Total amortization of intangible assets	10.7	$ 7.1	25.4	$ 21.5
Estimated future amortization expense
Remainder of 2018	23.5		23.5
2019	69.6		69.6
2020	61.5		61.5
2021	57.2		57.2
2022	29.3		29.3
Thereafter	15.2		15.2
In-process research and development
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	9.0		9.0
Acquired developed technology
Acquired developed technology, customer relationships and other intangibles
Gross Carrying Amount	503.0		503.0		369.3
Accumulated Amortization	(368.8)		(368.8)		(352.0)
Net	134.2		134.2		17.3
Customer relationships
Acquired developed technology, customer relationships and other intangibles
Gross Carrying Amount	182.1		182.1		94.9
Accumulated Amortization	(92.9)		(92.9)		(81.3)
Net	89.2		89.2		13.6
Other
Acquired developed technology, customer relationships and other intangibles
Gross Carrying Amount	44.8		44.8		9.9
Accumulated Amortization	(11.9)		(11.9)		(9.7)
Net	$ 32.9		$ 32.9		$ 0.2

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