Restructuring Charges and Cost Savings Initiatives (Schedule Of Restructuring Activity And Related Reserves) (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Oct. 30, 2016		Nov. 01, 2015	Jul. 31, 2016	Aug. 02, 2015
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 1		$ 21
2015 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	9
Restructuring Reserve [Roll Forward]
Restructuring charges	1		21	$ 35	$ 102
2015 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Noncurrent	9			17
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period	73
Restructuring charges	1
Cash Payments	(14)
Accrued Balance at end of period	60	[1]		73
General and Administrative Expense [Member] | 2015 Initiatives [Member] | Other Cost Savings Implementation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 8	[2]	$ 15	$ 47	$ 22

[1] Includes $9 of severance pay and benefits recorded in Other liabilities in the Consolidated Balance Sheet.

[2] Includes other costs recognized as incurred that are not reflected in the restructuring reserve in the Consolidated Balance Sheet. The costs are included in Administrative expenses in the Consolidated Statements of Earnings.