Restructuring Charges and Cost Savings Initiatives (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended		36 Months Ended
	Jan. 27, 2019	Jan. 28, 2018	Aug. 01, 2021
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 198	$ 132
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 184
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	39.00%
2015 and Snyder's-Lance Initiatives [Member] | Campbell Fresh [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	2.00%
2015 and Snyder's-Lance Initiatives [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	22.00%
2015 and Snyder's-Lance Initiatives [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment			$ 325
2015 and Snyder's-Lance Initiatives [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 620
Effect on Future Cash Flows, Amount	540
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	585
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	215
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	220
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	335
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	$ 375