Supplemental Financial Statement Data (Schedule of Balance Sheets) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 28, 2019	Jul. 29, 2018	Jul. 30, 2017
Receivables [Abstract]
Customer accounts receivable		$ 538	$ 528
Allowances		(13)	(18)
Accounts receivable, net current		525	510
Other receivables		49	53
Accounts receivable, net		574	563
Inventory, Net [Abstract]
Inventory, raw materials, containers and supplies		271	312
Inventory, finished products		592	575
Inventories		863	887
Property, Plant and Equipment, Net [Abstract]
Land		83	82
Buildings and Improvements, Gross		1,474	1,439
Machinery and Equipment, Gross		3,473	3,554
Construction in Progress, Gross		185	164
Property, Plant and Equipment, Gross		5,215	5,239
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	[1]	(2,760)	(2,773)
Plant assets, net of depreciation		2,455	2,466	$ 1,644
Depreciation		389	360	299
Other Assets, Noncurrent [Abstract]
Investments		77	92
Deferred Taxes		2	2
Pensions		21	61
Other Assets, Miscellaneous, Noncurrent		27	34
Other assets		127	189
Other Liabilities, Current [Abstract]
Employee-related Liabilities, Current		234	162
Derivative Liability, Current		8	3
Accrued Marketing Costs, Current		135	130
Interest Payable, Current		97	102
Restructuring Reserve, Current		29	19
Other Accrued Liabilities, Current		106	100
Accrued liabilities		609	516
Other Liabilities, Noncurrent [Abstract]
Liability, Defined Benefit Pension Plan, Noncurrent		179	141
Deferred Compensation Liability, Noncurrent		79	90
Liability, Other Retirement Benefits, Noncurrent		210	206
Liability, Transition Tax On Unremitted Foreign Earnings		0	7
Liability, Uncertain Tax Positions, Noncurrent		19	22
Restructuring Reserve, Noncurrent		8	24
Other Liabilities, Noncurrent		64	57
Other liabilities		$ 559	547
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
Continuing Operations [Member]
Property, Plant and Equipment, Net [Abstract]
Depreciation		$ 315	$ 259	$ 192

[1] Depreciation expense was $389 in 2019, $360 in 2018 and $299 in 2017. Depreciation expense of continuing operations was $315 in 2019, $259 in 2018 and $192 in 2017. 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.