Supplemental Financial Statement Data Changes in Balances of Each Component of Accumulated 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
Changes in the Balances of Each Component of Accumulated Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 12	$ (35)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(57)	(11)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			13	(3)
Other comprehensive income (loss)	(18)	(30)	(44)	(14)
Ending Balance	(32)	(49)	(32)	(49)
Accumulated Defined Benefit Plans Adjustment [Member]
Changes in the Balances of Each Component of Accumulated Comprehensive Income (Loss) [Line Items]
Beginning Balance			7	11
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			0	0
Other comprehensive income (loss)			0	0
Ending Balance	7	11	7	11
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Changes in the Balances of Each Component of Accumulated Comprehensive Income (Loss) [Line Items]
Beginning Balance			5	(46)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(57)	(11)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			13	(3)
Other comprehensive income (loss)			(44)	(14)
Ending Balance	$ (39)	$ (60)	$ (39)	$ (60)