Accumulated Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 30, 2017	Jul. 31, 2016	Aug. 02, 2015	Aug. 03, 2014
Beginning Balance		$ (104)
Other comprehensive income (loss), after tax		51	$ 67	$ (314)
Ending Balance		(53)	(104)
Accumulated Other Comprehensive Income Foreign Currency Translation Tax (Benefit) Expense		6	6	6	$ 7
Accumulated Other Comprehensive Income Cashflow Hedges Tax (Benefit) Expense		(12)	(23)	(5)	(1)
Accumulated Other Comprehensive Income Unamortized Pension And Post Retirement Tax (Benefit) Expense		30	35	1	$ 2
Accumulated Translation Adjustment [Member]
Beginning Balance	[1]	(124)	(166)	144
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		40	42	(310)
Other Comprehensive Income Reclassifications Current Period Net of Tax		0	0	0
Other comprehensive income (loss), after tax		40	42	(310)
Ending Balance	[1]	(84)	(124)	(166)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Beginning Balance	[2]	(41)	(5)	(3)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		12	(29)	(2)
Other Comprehensive Income Reclassifications Current Period Net of Tax		7	(7)	0
Other comprehensive income (loss), after tax		19	(36)	(2)
Ending Balance	[2]	(22)	(41)	(5)
Accumulated Defined Benefit Plans Adjustment [Member]
Beginning Balance	[3]	61	3	4
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		8	59	0
Other Comprehensive Income Reclassifications Current Period Net of Tax		(16)	(1)	(1)
Other comprehensive income (loss), after tax		(8)	58	(1)
Ending Balance	[3]	53	61	3
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance		(104)	(168)	145
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		60	72	(312)
Other Comprehensive Income Reclassifications Current Period Net of Tax		(9)	(8)	(1)
Other comprehensive income (loss), after tax		51	64	(313)
Ending Balance		$ (53)	$ (104)	$ (168)

[1] Included a tax expense of $6 as of July 30, 2017, July 31, 2016, and August 2, 2015, and $7 as of August 3, 2014.

[2] Included a tax benefit of $12 as of July 30, 2017, $23 as of July 31, 2016, $5 as of August 2, 2015, and $1 as of August 3, 2014.

[3] Included a tax expense of $30 as of July 30, 2017, $35 as of July 31, 2016, $1 as of August 2, 2015, and $2 as of August 3, 2014.