Goodwill and Other Intangible Assets (Carrying value of intangible assets) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jan. 01, 2016	Jul. 03, 2015
Intangible assets acquired
Gross Carrying Amount	$ 878	$ 732
Accumulated Amortization	(357)	(362)
Net Carrying Amount	$ 521	$ 370
Weighted Average Remaining Useful Life (in years)	3 years 10 months 24 days	3 years 1 month 6 days
Existing technology [Member]
Intangible assets acquired
Gross Carrying Amount	$ 311	$ 191
Accumulated Amortization	(57)	(69)
Net Carrying Amount	$ 254	$ 122
Weighted Average Remaining Useful Life (in years)	4 years 6 months	4 years 1 month 6 days
Customer relationships [Member]
Intangible assets acquired
Gross Carrying Amount	$ 510	$ 487
Accumulated Amortization	(283)	(282)
Net Carrying Amount	$ 227	$ 205
Weighted Average Remaining Useful Life (in years)	3 years 4 months 24 days	2 years 4 months 24 days
Trade name [Member]
Intangible assets acquired
Gross Carrying Amount	$ 29	$ 27
Accumulated Amortization	(10)	(7)
Net Carrying Amount	$ 19	$ 20
Weighted Average Remaining Useful Life (in years)	3 years	3 years 2 months 12 days
Other Intangible Assets [Member]
Intangible assets acquired
Gross Carrying Amount	$ 28	$ 27
Accumulated Amortization	(7)	(4)
Net Carrying Amount	$ 21	$ 23
Weighted Average Remaining Useful Life (in years)	3 years 8 months 12 days	4 years 2 months 12 days