Restructuring Charges and Cost Savings Initiatives (Schedule Of Pre-Tax Charges) (Details) - USD ($) $ in Millions		12 Months Ended
		Aug. 02, 2020	Jul. 28, 2019	Jul. 29, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 9	$ 31	$ 55
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		9	31	55
Restructuring and Related Cost, Incurred Cost		69	121	202
Restructuring and Related Cost, Cost Incurred to Date		641
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		9	31
Restructuring and Related Cost, Cost Incurred to Date		214
2015 and Snyder's-Lance Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		4	18
Restructuring and Related Cost, Cost Incurred to Date		67
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		360
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	0	8
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		238
2015 and Snyder's-Lance Initiatives [Member] | General and Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		48	62	99
Restructuring and Related Cost, Cost Incurred to Date		311
2015 and Snyder's-Lance Initiatives [Member] | Cost Of Products Sold [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		9	18	45
Restructuring and Related Cost, Cost Incurred to Date		76
2015 and Snyder's-Lance Initiatives [Member] | Selling and Marketing Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		2	7	3
Restructuring and Related Cost, Cost Incurred to Date		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		1	$ 3	$ 0
Restructuring and Related Cost, Cost Incurred to Date		$ 4

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