Balance Sheet Information (Fair value and amortized cost of available-for-sale securities by contractual maturity) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Jul. 01, 2016
Amortized Cost
Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Amortized Cost Basis	$ 1,717
AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortize	0
AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsAmortizedCost	0
Total Amortized Cost	1,717
Fair Value
Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value	1,717
Available-for-sale Securities, Debt Maturities, after One Through Five Years, at Fair Value	0
Available-for-sale Securities, Debt Maturities, after Five Years Fair Value	0
Total Fair Value	1,717
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,717	$ 243
Unrealized Gain/(Loss)	0	0
Fair Value	1,717	243
Available-for-sale securities, continuous unrealized loss position, fair value	0	0
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,214	232
Unrealized Gain/(Loss)	0	0
Fair Value	1,214	232
Certificates of deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		5
Unrealized Gain/(Loss)		0
Fair Value		5
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		6
Unrealized Gain/(Loss)		0
Fair Value		6
Cash and cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1,712	230
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value		6
Other current assets [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	$ 5	$ 7