Accumulated Other Comprehensive Income (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Nov. 02, 2014		Oct. 27, 2013	Aug. 03, 2014
Beginning Balance	$ (569)
Other comprehensive income (loss), after tax	(65)		58
Ending Balance	(634)
Accumulated Other Comprehensive Income Foreign Currency Translation Tax (Benefit) Expense	7			7
Accumulated Other Comprehensive Income Cashflow Hedges Tax (Benefit) Expense	(1)			(1)
Accumulated Other Comprehensive Income Unamortized Pension And Post Retirement Tax (Benefit) Expense	(395)			(405)
Accumulated Translation Adjustment [Member]
Beginning Balance	137	[1]
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax	(83)
Other Comprehensive Income Reclassifications Current Period Net of Tax	0
Other comprehensive income (loss), after tax	(83)
Ending Balance	54	[1]
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Beginning Balance	(3)	[2]
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax	(1)
Other Comprehensive Income Reclassifications Current Period Net of Tax	1
Other comprehensive income (loss), after tax	0
Ending Balance	(3)	[2]
Accumulated Defined Benefit Plans Adjustment [Member]
Beginning Balance	(703)	[3]
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax	3
Other Comprehensive Income Reclassifications Current Period Net of Tax	15
Other comprehensive income (loss), after tax	18
Ending Balance	(685)	[3]
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance	(569)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax	(81)
Other Comprehensive Income Reclassifications Current Period Net of Tax	16
Other comprehensive income (loss), after tax	(65)		59
Ending Balance	$ (634)

[1] Included a tax expense of $7 as of November 2, 2014 and August 3, 2014.

[2] Included a tax benefit of $1 as of November 2, 2014 and August 3, 2014.

[3] Included a tax benefit of $395 as of November 2, 2014 and $405 as of August 3, 2014.