Restructuring Charges and Cost Savings Initiatives (Schedule Of Pre-Tax Charges) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 26, 2020	Jan. 31, 2021	Jan. 26, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 18	$ 7	$ 19	$ 10
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	18	7	19	10
Restructuring and Related Cost, Incurred Cost	22	25	28	36
Restructuring and Related Cost, Cost Incurred to Date	669		669
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			4
Restructuring and Related Cost, Cost Incurred to Date	219		219
2015 and Snyder's-Lance Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			13
Restructuring and Related Cost, Cost Incurred to Date	80		80
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	370		370
2015 and Snyder's-Lance Initiatives [Member] | Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	23		23
2015 and Snyder's-Lance Initiatives [Member] | Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	19		19
2015 and Snyder's-Lance Initiatives [Member] | Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | Implementation Costs and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	4		4
2015 and Snyder's-Lance Initiatives [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	257		257
2015 and Snyder's-Lance Initiatives [Member] | General and Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	6	13	10	21
Restructuring and Related Cost, Cost Incurred to Date	321		321
2015 and Snyder's-Lance Initiatives [Member] | Cost Of Products Sold [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	(2)	2	(1)	2
Restructuring and Related Cost, Cost Incurred to Date	75		75
2015 and Snyder's-Lance Initiatives [Member] | Selling and Marketing Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0	2	0	2
Restructuring and Related Cost, Cost Incurred to Date	12		12
2015 and Snyder's-Lance Initiatives [Member] | Research and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0	$ 1	0	$ 1
Restructuring and Related Cost, Cost Incurred to Date	$ 4		$ 4