Accumulated Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 29, 2018	Jul. 30, 2017	Jul. 31, 2016	Aug. 02, 2015
Beginning Balance		$ (53)
Other comprehensive income (loss), after tax		(64)	$ 51	$ 67
Ending Balance		(118)	(53)
Accumulated Other Comprehensive Income Foreign Currency Translation Tax (Benefit) Expense		6	6	6	$ 6
Accumulated Other Comprehensive Income Cashflow Hedges Tax (Benefit) Expense		(4)	(12)	(23)	(5)
Accumulated Other Comprehensive Income Unamortized Pension And Post Retirement Tax (Benefit) Expense		25	30	35	$ 1
Accumulated Translation Adjustment [Member]
Beginning Balance	[1]	(84)	(124)	(166)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		(70)	40	42
Other Comprehensive Income Reclassifications Current Period Net of Tax		0	0	0
Other comprehensive income (loss), after tax		(70)	40	42
Ending Balance	[1]	(154)	(84)	(124)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Beginning Balance	[2]	(22)	(41)	(5)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		16	12	(29)
Other Comprehensive Income Reclassifications Current Period Net of Tax		2	7	(7)
Other comprehensive income (loss), after tax		18	19	(36)
Ending Balance	[2]	(4)	(22)	(41)
Accumulated Defined Benefit Plans Adjustment [Member]
Beginning Balance	[3]	53	61	3
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		7	8	59
Other Comprehensive Income Reclassifications Current Period Net of Tax		(20)	(16)	(1)
Other comprehensive income (loss), after tax		(13)	(8)	58
Ending Balance	[3]	40	53	61
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance		(53)	(104)	(168)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		(47)	60	72
Other Comprehensive Income Reclassifications Current Period Net of Tax		(18)	(9)	(8)
Other comprehensive income (loss), after tax		(65)	51	64
Ending Balance		$ (118)	$ (53)	$ (104)

[1] Included a tax expense of $6 as of July 29, 2018, July 30, 2017, July 31, 2016, and August 2, 2015.

[2] Included a tax benefit of $4 as of July 29, 2018, $12 as of July 30, 2017, $23 as of July 31, 2016, and $5 as of August 2, 2015.

[3] Included a tax expense of $25 as of July 29, 2018, $30 as of July 30, 2017, $35 as of July 31, 2016, and $1 as of August 2, 2015.