Stock-based Compensation (Schedule Of Stock Option Activity) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Nov. 02, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Beginning of year, Options	408
Granted, Options	0
Exercised, Options	(215)
Terminated, Options	(3)
End of year, Options	190
Exercisable at end of period, Options	190
Beginning of period, Weighted-Average Exercise Price	$ 28.33
Granted, Weighted-Average Exercise Price	$ 0.00
Exercised, Weighted-Average Exercise Price	$ 26.88
Terminated, Weighted-Average Exercise Price	$ 26.36
End of period, Weighted-Average Exercise Price	$ 29.95
Exercisable at end of period, Weighted-Average Exercise Price	$ 29.95
Outstanding at end of period, Weighted-Average Remaining Contractual Life (In years)	0 years 10 months
Exercisable at end of period, Weighted-Average Remaining Contractual Life (In years)	0 years 10 months
Outstanding at end of period, Aggregate Intrinsic Value	$ 3
Exercisable at end of period, Aggregate Intrinsic Value	$ 3