Restructuring Charges and Cost Savings Initiatives (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended						24 Months Ended
		Jul. 28, 2019		Jul. 29, 2018		Jul. 30, 2017		Aug. 01, 2021
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 384		$ 407		$ 338
Meals & Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment		156		187		117
Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment		134		91		75
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment	[1]	35		41		47
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 250
2015 and Snyder's-Lance Initiatives [Member] | Meals & Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation		35.00%
2015 and Snyder's-Lance Initiatives [Member] | 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		25.00%
2015 and Snyder's-Lance Initiatives [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment								$ 395
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		$ 37	[2]	43	[3]	19	[4]
2015 and Snyder's-Lance Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		65
2015 and Snyder's-Lance Initiatives [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		615
Effect on Future Cash Flows, Amount		540
2015 and Snyder's-Lance Initiatives [Member] | Minimum [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		205
2015 and Snyder's-Lance Initiatives [Member] | Minimum [Member] | Implementation Costs and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		345
2015 and Snyder's-Lance Initiatives [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		665
Effect on Future Cash Flows, Amount		590
2015 and Snyder's-Lance Initiatives [Member] | Maximum [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		210
2015 and Snyder's-Lance Initiatives [Member] | Maximum [Member] | Implementation Costs and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		390
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		$ 1		$ 3		$ 7

[1] Represents primarily corporate offices.

[2] Includes $8 of severance pay and benefits recorded in Other liabilities in the Consolidated Balance Sheet

[3] 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.

[4] Includes $2 of severance pay and benefits recorded in Other liabilities in the Consolidated Balance Sheet.