Supplemental Financial Statement Data (Schedule of Balance Sheets) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 30, 2017	Jul. 31, 2016	Aug. 02, 2015
Receivables [Abstract]
Customer accounts receivable		$ 561	$ 566
Allowances		(11)	(12)
Accounts receivable, net current		550	554
Other receivables		55	72
Accounts receivable, net		605	626
Inventory, Net [Abstract]
Inventory, Raw Materials, Gross		377	391
Inventory, Finished Goods, Gross		525	549
Inventories		902	940
Prepaid Expense and Other Assets, Current [Abstract]
Derivative Asset, Current		9	5
Other Assets, Miscellaneous, Current		65	41
Other current assets		74	46
Property, Plant and Equipment, Net [Abstract]
Land		64	58
Buildings and Improvements, Gross		1,553	1,488
Machinery and Equipment, Gross		4,231	4,042
Construction in Progress, Gross		195	176
Property, Plant and Equipment, Gross		6,043	5,764
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	[1]	(3,589)	(3,357)
Plant assets, net of depreciation		2,454	2,407	$ 2,347
Depreciation		299	288	$ 286
Other Assets, Noncurrent [Abstract]
Investments		69	47
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent		36	41
Other Assets, Miscellaneous, Noncurrent		34	19
Other assets		139	107
Other Liabilities, Current [Abstract]
Employee-related Liabilities, Current		241	263
Derivative Liability, Current		43	16
Accrued Marketing Costs, Current		131	130
Interest Payable, Current		34	35
Restructuring Reserve, Current		24	57
Other Accrued Liabilities, Current		88	103
Accrued liabilities		561	604
Other Liabilities, Noncurrent [Abstract]
Defined Benefit Pension Plan, Liabilities, Noncurrent		261	501
Deferred Compensation Liability, Noncurrent	[2]	96	100
Other Postretirement Benefits Payable, Noncurrent		247	285
Derivative Liability, Noncurrent		1	44
Liability for Uncertain Tax Positions, Noncurrent		34	31
Restructuring Reserve, Noncurrent		2	17
Other Accrued Liabilities, Noncurrent		56	61
Other liabilities		$ 697	$ 1,039
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] Depreciation expense was $299 in 2017, $288 in 2016 and $286 in 2015. 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.

[2] 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 Short-Term Investment Fund. 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.