Supplemental Financial Statement Data (Schedule of Balance Sheets) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 31, 2016	Aug. 02, 2015	Aug. 03, 2014
Receivables [Abstract]
Customer accounts receivable		$ 566	$ 570
Allowances		(12)	(13)
Accounts receivable, net current		554	557
Other receivables		72	90
Accounts receivable, net		626	647
Inventory, Net [Abstract]
Inventory, Raw Materials, Gross		391	427
Inventory, Finished Goods, Gross		549	568
Inventories		940	995
Prepaid Expense and Other Assets, Current [Abstract]
Deferred Tax Assets, Net of Valuation Allowance, Current	[1]	0	114
Derivative Asset, Current		5	32
Other Assets, Miscellaneous, Current		41	52
Other current assets		46	198
Property, Plant and Equipment, Net [Abstract]
Land		58	57
Buildings and Improvements, Gross		1,488	1,416
Machinery and Equipment, Gross		4,042	3,802
Construction in Progress, Gross		176	238
Property, Plant and Equipment, Gross		5,764	5,513
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	[2]	(3,357)	(3,166)
Plant assets, net of depreciation		2,407	2,347	$ 2,318
Other Assets, Noncurrent [Abstract]
Derivative Asset, Noncurrent		0	22
Investments		47	10
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent		41	25
Other Assets, Miscellaneous, Noncurrent		19	31
Other assets		107	88
Other Liabilities, Current [Abstract]
Employee-related Liabilities, Current		263	255
Derivative Liability, Current		16	12
Accrued Marketing Costs, Current		130	125
Interest Payable, Current		35	35
Restructuring Reserve, Current		57	54
Other Accrued Liabilities, Current		103	108
Accrued liabilities		604	589
Other Liabilities, Noncurrent [Abstract]
Defined Benefit Pension Plan, Liabilities, Noncurrent		501	233
Deferred Compensation Liability, Noncurrent	[3]	100	104
Other Postretirement Benefits Payable, Noncurrent		285	362
Derivative Liability, Noncurrent		44	8
Liability for Uncertain Tax Positions, Noncurrent		31	26
Restructuring Reserve, Noncurrent		17	49
Other Accrued Liabilities, Noncurrent		61	68
Other liabilities		1,039	850
Depreciation		$ 288	$ 286	$ 287
Building [Member] | Minimum [Member]
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Useful Life		7 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Useful Life		45 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Useful Life		2 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Useful Life		20 years

[1] In November 2015, the FASB issued guidance that requires deferred tax liabilities and assets to be classified as noncurrent in the balance sheet. We adopted the guidance in 2016 on a prospective basis and modified the presentation of deferred taxes in the Consolidated Balance Sheet as of July 31, 2016.

[2] Depreciation expense was $288 in 2016, $286 in 2015 and $287 in 2014. Buildings are depreciated over periods ranging from 7 to 45 years. Machinery and equipment are depreciated over periods generally ranging from 2 to 20 years.

[3] The deferred compensation obligation represents unfunded plans maintained for the purpose of providing our directors and certain of our executives the opportunity to defer a portion of their compensation. All forms of compensation contributed to the deferred compensation plans are accounted for in accordance with the underlying program. Deferrals and our contributions are credited to an investment account in the participant's name, although no funds are actually contributed to the investment account and no investments are actually purchased. Seven investment choices are available, including: (1) a book account that tracks the total return on our stock; (2) a book account that tracks the performance of the Vanguard Institutional Index; (3) a book account that tracks the performance of the Vanguard Extended Market Index; (4) a book account that tracks the performance of the Vanguard Total International Stock Index; (5) a book account that tracks the performance of the Vanguard Total Bond Market Index; (6) a book account that tracks the performance of the Vanguard Short-Term Bond Index; and (7) a book account that tracks the BlackRock Liquidity TempFund. Participants can reallocate investments daily and are entitled to the gains and losses on investment funds. We recognize an amount in the Consolidated Statements of Earnings for the market appreciation/depreciation of each fund.