Supplemental Financial Statement Data Supplemental FS Data - Investments (Details) - USD ($) $ in Millions	Oct. 02, 2015	Jul. 03, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 702	$ 590
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	1	0
Available-for-sale Securities, Fair Value Disclosure	703	590
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	279	287
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	1	0
Available-for-sale Securities, Fair Value Disclosure	280	287
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	116	95
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	0	0
Available-for-sale Securities, Fair Value Disclosure	116	95
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	86	109
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	0	0
Available-for-sale Securities, Fair Value Disclosure	86	109
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	221	99
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	0	0
Available-for-sale Securities, Fair Value Disclosure	$ 221	$ 99