Supplemental Financial Statement Data Supplemental FS Data - Investments (Details) - USD ($) $ in Millions	Jan. 01, 2016	Jul. 03, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 732	$ 590
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	(1)	0
Available-for-sale Securities, Fair Value Disclosure	731	590
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	306	287
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	(1)	0
Available-for-sale Securities, Fair Value Disclosure	305	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	50	109
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	0	0
Available-for-sale Securities, Fair Value Disclosure	50	109
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	260	99
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	0	0
Available-for-sale Securities, Fair Value Disclosure	$ 260	$ 99