Accumulated Other Comprehensive Income (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		May. 01, 2016	May. 03, 2015	May. 01, 2016	May. 03, 2015	Aug. 02, 2015
Beginning Balance				$ (168)
Other comprehensive income (loss), after tax		$ 79	$ 14	26	$ (243)
Ending Balance		(144)		(144)
Accumulated Other Comprehensive Income Foreign Currency Translation Tax (Benefit) Expense		6		6		$ 6
Accumulated Other Comprehensive Income Cashflow Hedges Tax (Benefit) Expense		(19)		(19)		(5)
Accumulated Other Comprehensive Income Unamortized Pension And Post Retirement Tax (Benefit) Expense		1		1		$ 1
Accumulated Translation Adjustment [Member]
Beginning Balance	[1]			(166)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax				56
Other Comprehensive Income Reclassifications Current Period Net of Tax				0
Other comprehensive income (loss), after tax				56
Ending Balance	[1]	(110)		(110)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Beginning Balance	[2]			(5)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax				(24)
Other Comprehensive Income Reclassifications Current Period Net of Tax				(6)
Other comprehensive income (loss), after tax				(30)
Ending Balance	[2]	(35)		(35)
Accumulated Defined Benefit Plans Adjustment [Member]
Beginning Balance	[3]			3
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax				0
Other Comprehensive Income Reclassifications Current Period Net of Tax				(2)
Other comprehensive income (loss), after tax				(2)
Ending Balance	[3]	1		1
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance				(168)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax				32
Other Comprehensive Income Reclassifications Current Period Net of Tax				(8)
Other comprehensive income (loss), after tax				24	$ (243)
Ending Balance		$ (144)		$ (144)

[1] Included a tax expense of $6 as of May 1, 2016, and August 2, 2015.

[2] Included a tax benefit of $19 as of May 1, 2016, and $5 as of August 2, 2015.

[3] Included a tax expense of $1 as of May 1, 2016, and August 2, 2015.