Restructuring Charges and Cost Savings Initiatives (Schedule Of Pre-Tax Charges) (Details) - USD ($) $ in Millions		3 Months Ended
		Oct. 27, 2019	Oct. 28, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 3	$ 18
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		3	18
Restructuring and Related Cost, Incurred Cost		11	45
Restructuring and Related Cost, Cost Incurred to Date		583
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		3
Restructuring and Related Cost, Cost Incurred to Date		208
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		63
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		312
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, Incurred Cost		0	1
Restructuring and Related Cost, Cost Incurred to Date	[1]	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
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
2015 and Snyder's-Lance Initiatives [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date		232
2015 and Snyder's-Lance Initiatives [Member] | General and Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		8	13
Restructuring and Related Cost, Cost Incurred to Date		271
2015 and Snyder's-Lance Initiatives [Member] | Cost Of Products Sold [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		0	12
Restructuring and Related Cost, Cost Incurred to Date		67
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
Restructuring and Related Cost, Cost Incurred to Date		10
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	$ 0
Restructuring and Related Cost, Cost Incurred to Date		$ 3

[1] Includes $19 of severance pay and benefits and $4 of implementation costs and other related costs.