Restructuring Charges and Cost Savings Initiatives (Schedule Of Restructuring Activity And Related Reserves) (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Apr. 28, 2019	Apr. 29, 2018		Apr. 28, 2019	Apr. 29, 2018		Jul. 29, 2018
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost		$ 20	$ 75	[1]	$ 89	$ 153	[1]
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period	[2]				45
Restructuring and Related Cost, Incurred Cost					21
Cash Payments					(26)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)					(1)
Accrued Balance at end of period	[3]	39			39
Restructuring Reserve, Noncurrent		11			11			$ 24
2015 and Snyder's-Lance Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost					24
2015 and Snyder's-Lance Initiatives [Member] | Other Cost Savings Implementation Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	[4]				44
Snyder's-Lance Cost Transformation Program and Integration [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost			10			10
Snyder's-Lance Cost Transformation Program and Integration [Member] | Severance Pay And Benefits [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period					9
Restructuring Reserve, Noncurrent								$ 1
General and Administrative Expense [Member] | 2015 and Snyder's-Lance Initiatives [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost		$ 12	35		$ 35	73
General and Administrative Expense [Member] | Snyder's-Lance Cost Transformation Program and Integration [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost			$ 6			$ 6

[1] Includes $10 of Restructuring charges and $6 of Administrative expenses in the three- and nine-month periods ended April 29, 2018 associated with the Snyder's-Lance cost transformation program and integration.

[2] Includes $24 of severance pay and benefits recorded in Other liabilities in the Consolidated Balance Sheet, $1 of which is associated with the Snyder's-Lance cost transformation program and integration. Of total accrued balance, $9 is associated with the Snyder's-Lance cost transformation program and integration.

[3] Includes $11 of severance pay and benefits recorded in Other liabilities in the Consolidated Balance Sheet.

[4] Includes other costs recognized as incurred that are not reflected in the restructuring reserve in the Consolidated Balance Sheets. The costs are included in Administrative expenses, Cost of products sold, Marketing and selling expenses, and Research and development expenses in the Consolidated Statements of Earnings.