Restructuring Charges and Cost Savings Initiatives (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended			36 Months Ended
	Apr. 28, 2019		Apr. 29, 2018	Aug. 01, 2021	Jul. 29, 2018
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 274		$ 223
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 226
2015 and Snyder's-Lance Initiatives [Member] | Meals and Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	37.00%
2015 and Snyder's-Lance Initiatives [Member] | Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	40.00%
2015 and Snyder's-Lance Initiatives [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	23.00%
2015 and Snyder's-Lance Initiatives [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment				$ 340
2015 and Snyder's-Lance Initiatives [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 610
Effect on Future Cash Flows, Amount	530
2015 and Snyder's-Lance Initiatives [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	655
Effect on Future Cash Flows, Amount	575
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	39	[1]			$ 45	[2]
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	210
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	215
2015 and Snyder's-Lance Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	70
2015 and Snyder's-Lance Initiatives [Member] | Implementation Costs and Other Related Costs [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	330
2015 and Snyder's-Lance Initiatives [Member] | Implementation Costs and Other Related Costs [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	370
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | 2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 0				$ 1

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

[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.