Balance Sheet Information (Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Unrealized Gains (Losses) on Cash Flow Hedges
Beginning Balance			$ (1)	$ 0
Other comprehensive income (loss) before reclassifications	(6)	(2)	(9)	(1)
Amounts reclassified from AOCI	(2)	0	(2)	0
Other comprehensive income (loss)	(4)	(2)	(7)	(1)
Ending Balance	(8)	(1)	(8)	(1)
Unrealized Gains (Losses) on Marketable Securities (a)
Beginning Balance			0	(3)
Other comprehensive income (loss) before reclassifications	0	0	0	1
Amounts reclassified from AOCI	0	0	0	0
Other comprehensive income (loss)	0	0	0	1
Ending Balance	0	(2)	0	(2)
Unrealized Gains (Losses) on post-retirements
Beginning Balance			(10)	(10)
Other comprehensive income (loss) before reclassifications	0	1	0	1
Amounts reclassified from AOCI	0	0	0	0
Other comprehensive income (loss)	0	1	0	1
Ending Balance	(10)	(9)	(10)	(9)
Foreign currency translation adjustments
Beginning Balance			9	0
Other comprehensive income (loss) before reclassifications			(16)	5
Amounts reclassified from AOCI			0	0
Other comprehensive income (loss)	(6)	0	(16)	5
Ending Balance	(7)	5	(7)	5
Total
Beginning Balance			(2)	(13)
Other comprehensive income before reclassifications			(25)
Amounts reclassified from AOCI			2	0
Total other comprehensive income (loss), net of tax	(10)	(1)	(23)	6
Accumulated other comprehensive loss	$ (25)	$ (7)	$ (25)	$ (7)