Restructuring Charges (Schedule Of Restructuring Activity And Related Reserves) (Details) - USD ($) $ in Millions		12 Months Ended
		Aug. 02, 2015		Aug. 03, 2014	Jul. 28, 2013
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Noncurrent		$ 49		$ 0
2015 Initiatives [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost		124
2015 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period		0
Restructuring and Related Cost, Incurred Cost		87
Cash Payments		(1)
Restructuring Reserve, Translation Adjustment		(1)
Accrued Balance at end of period		85	[1]	0
Restructuring Reserve, Noncurrent		45
2015 Initiatives [Member] | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period		0
Restructuring and Related Cost, Incurred Cost		8
Cash Payments		0
Restructuring Reserve, Translation Adjustment		0
Accrued Balance at end of period		8		0
2015 Initiatives [Member] | Employee Severance and Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period		0
Restructuring and Related Cost, Incurred Cost		95
Cash Payments		(1)
Restructuring Reserve, Translation Adjustment		(1)
Accrued Balance at end of period		93		0
2015 Initiatives [Member] | Other Non-cash Benefit Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	[2]	7
2015 Initiatives [Member] | Other Cost Savings Implementation Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	[3]	22
2014 Initiatives [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost		0		54
2014 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period		28		0
Restructuring and Related Cost, Incurred Cost		0		41
Cash Payments		(16)		(13)
Restructuring Reserve, Translation Adjustment		(2)		0
Accrued Balance at end of period		10	[4]	28	$ 0
Restructuring Reserve, Noncurrent		4
2014 Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost		0		12
2014 Initiatives [Member] | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	[5]	0		1
2013 Initiatives [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost		0		4	142
2013 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period		3		17	0
Restructuring and Related Cost, Incurred Cost		0		0	32
Cash Payments		(3)		(14)	(15)
Accrued Balance at end of period		0		3	17
2013 Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost		0		0	99
2013 Initiatives [Member] | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	[6]	0		4	8
2013 Initiatives [Member] | Other Non-cash Benefit Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	[7]	$ 0		$ 0	$ 3

[1] Includes $45 of severance pay and benefits recorded in Other liabilities in the Consolidated Balance Sheet.

[2] Represents postretirement and pension curtailment costs. See Note 11.

[3] 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.

[4] Includes $4 of severance pay and benefits recorded in Other liabilities in the Consolidated Balance Sheet.

[5] Includes non-cash costs that are not reflected in the restructuring reserve in the Consolidated Balance Sheet.

[6] Includes non-cash costs and other exit costs recognized as incurred that are not reflected in the restructuring reserve in the Consolidated Balance Sheet.

[7] Represents pension curtailment costs. See Note 11.