Goodwill and Other Intangible Assets (Carrying value of intangible assets) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Mar. 31, 2017	Jul. 01, 2016	Oct. 06, 2015
Intangible assets acquired
Gross Carrying Amount	$ 877	$ 865
Accumulated Amortization	(554)	(431)
Net Carrying Amount	$ 323	$ 434
Weighted Average Remaining Useful Life (in years)	3 years 4 months 24 days	3 years 7 months 6 days
Technology-Based Intangible Assets [Member]
Intangible assets acquired
Gross Carrying Amount	$ 311	$ 297
Accumulated Amortization	(126)	(79)
Net Carrying Amount	$ 185	$ 218
Weighted Average Remaining Useful Life (in years)	3 years 8 months 12 days	4 years 1 month 6 days
Customer relationships [Member]
Intangible assets acquired
Gross Carrying Amount	$ 508	$ 510
Accumulated Amortization	(394)	(328)
Net Carrying Amount	$ 114	$ 182
Weighted Average Remaining Useful Life (in years)	3 years 2 months 12 days	3 years 2 months 12 days
Trade name [Member]
Intangible assets acquired
Gross Carrying Amount	$ 29	$ 29
Accumulated Amortization	(20)	(14)
Net Carrying Amount	$ 9	$ 15
Weighted Average Remaining Useful Life (in years)	2 years 2 months 12 days	2 years 7 months 6 days
Other Intangible Assets [Member]
Intangible assets acquired
Gross Carrying Amount	$ 29	$ 29
Accumulated Amortization	(14)	(10)
Net Carrying Amount	$ 15	$ 19
Weighted Average Remaining Useful Life (in years)	2 years 9 months 18 days	3 years 2 months 12 days
In Process Research and Development [Member]
Intangible assets acquired
In-process research and development	$ 14	$ 14	$ 14