Restructuring Charges and Cost Savings Initiatives (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 26, 2025	Jan. 28, 2024	Jan. 26, 2025	Jan. 28, 2024	Jul. 28, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 5	$ 2	$ 11	$ 4
Corporate Segment and Other Operating Segment [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	20	34	49	45
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		2		4
Other Restructuring Costs		$ 36		$ 49
Restructuring and Related Cost, Cost Incurred to Date					$ 895
2015 and Snyder's-Lance Initiatives [Member] | Meals & Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date					288
2015 and Snyder's-Lance Initiatives [Member] | Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date					383
2015 and Snyder's-Lance Initiatives [Member] | Corporate Segment and Other Operating Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date					224
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date					253
2015 and Snyder's-Lance Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date					134
2015 and Snyder's-Lance Initiatives [Member] | Implementation Costs and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date					508
2015 and Snyder's-Lance Initiatives [Member] | Cash Expenditures [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date					720
Other Cost Savings Implementation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	115		115
Other Cost Savings Implementation Costs [Member] | Marketing and Selling Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs			8
Restructuring and Related Cost, Cost Incurred to Date	13		13
Sovos Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					$ 21
2025 Initiatives
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	190		190
Payments to Acquire Property, Plant and Equipment - Expected Payments	215		215
Payments to Acquire Property, Plant, and Equipment - Incurred to Date	57		57
Restructuring charges	5		11
Other Restructuring Costs	25		52
Restructuring and Related Cost, Cost Incurred to Date	$ 52		$ 52
2025 Initiatives | Meals & Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	72.00%		72.00%
Other Restructuring Costs	$ 16		$ 37
Restructuring and Related Cost, Cost Incurred to Date	$ 37		$ 37
2025 Initiatives | Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	9.00%		9.00%
Other Restructuring Costs	$ 2		$ 5
Restructuring and Related Cost, Cost Incurred to Date	$ 5		$ 5
2025 Initiatives | Corporate Segment and Other Operating Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	19.00%		19.00%
Other Restructuring Costs	$ 7		$ 10
Restructuring and Related Cost, Cost Incurred to Date	10		10
2025 Initiatives | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	20		20
Restructuring and Related Cost, Cost Incurred to Date	11		11
2025 Initiatives | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	50		50
Other Restructuring Costs			17
Restructuring and Related Cost, Cost Incurred to Date	17		17
2025 Initiatives | Implementation Costs and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	120		120
Restructuring and Related Cost, Cost Incurred to Date	24		24
2025 Initiatives | Cash Expenditures [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 135		$ 135