Supplemental Financial Statement Data (Schedule of Balance Sheets) (Details) - USD ($) $ in Millions		12 Months Ended
		Aug. 01, 2021	Aug. 02, 2020	Jul. 28, 2019
Receivables [Abstract]
Customer accounts receivable		$ 556	$ 544
Allowances		(12)	(14)
Accounts receivable, net current		544	530
Other receivables		51	45
Accounts receivable, net		595	575
Inventory, Net [Abstract]
Inventory, raw materials, containers and supplies		321	297
Inventory, finished products		612	574
Inventories		933	871
Property, Plant and Equipment, Net [Abstract]
Land		75	75
Buildings and Improvements, Gross		1,493	1,473
Machinery and Equipment, Gross		3,732	3,463
Construction in Progress, Gross		189	274
Property, Plant and Equipment, Gross		5,489	5,285
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	[1]	(3,119)	(2,917)
Plant assets, net of depreciation		2,370	2,368	$ 2,455
Other Assets, Noncurrent [Abstract]
Operating Lease, Right-of-Use Asset		235	254
Pensions		190	10
Other Assets, Miscellaneous, Noncurrent		24	19
Other assets		449	283
Other Liabilities, Current [Abstract]
Accrued liabilities		576	693
Other Liabilities, Noncurrent [Abstract]
Other liabilities		705	820
Depreciation		275	285	389
Accrued Liabilities [Member]
Other Liabilities, Current [Abstract]
Employee-related Liabilities, Current		203	252
Derivative Liability, Current		3	11
Accrued Marketing Costs, Current		121	156
Interest Payable, Current		70	79
Restructuring Reserve, Current		6	12
Operating Lease, Liability, Current		54	67
Other Accrued Liabilities, Current		119	116
Other Liabilities [Member]
Other Liabilities, Noncurrent [Abstract]
Liability, Defined Benefit Pension Plan, Noncurrent		142	242
Liability, Other Retirement Benefits, Noncurrent		199	220
Operating Lease, Liability, Noncurrent		180	184
Deferred Compensation Liability, Noncurrent		92	80
Liability, Uncertain Tax Positions, Noncurrent		20	17
Other Liabilities, Noncurrent		$ 72	$ 77
Discontinued Operations [Member]
Other Liabilities, Noncurrent [Abstract]
Depreciation				$ 74
Building [Member] | Minimum [Member]
Other Liabilities, Noncurrent [Abstract]
Property, Plant and Equipment, Useful Life		7 years
Building [Member] | Maximum [Member]
Other Liabilities, Noncurrent [Abstract]
Property, Plant and Equipment, Useful Life		45 years
Machinery and Equipment [Member] | Minimum [Member]
Other Liabilities, Noncurrent [Abstract]
Property, Plant and Equipment, Useful Life		2 years
Machinery and Equipment [Member] | Maximum [Member]
Other Liabilities, Noncurrent [Abstract]
Property, Plant and Equipment, Useful Life		20 years

[1] Depreciation expense was $275 in 2021, $285 in 2020 and $389 in 2019. Depreciation expense associated with discontinued operations was $74 in 2019. 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.