Restructuring Charges and Cost Savings Initiatives (Schedule Of Pre-Tax Charges) (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Apr. 28, 2019	Apr. 29, 2018		Apr. 28, 2019	Apr. 29, 2018		Jul. 29, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 1	$ 24		$ 21	$ 58
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1	24		21	58
Restructuring and Related Cost, Incurred Cost		20	75	[1]	89	153	[1]
Restructuring and Related Cost, Cost Incurred to Date	[2]	556			556
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost					21
Restructuring and Related Cost, Cost Incurred to Date	[3]	211			211
2015 and Snyder's-Lance Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost					24
Restructuring and Related Cost, Cost Incurred to Date		69			69
2015 and Snyder's-Lance Initiatives [Member] | Implementation Costs and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	[4]				44
Restructuring and Related Cost, Cost Incurred to Date	[5]	276			276
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		1	2
Restructuring and Related Cost, Cost Incurred to Date	[6]	8			8
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		4			4
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		235			235
2015 and Snyder's-Lance Initiatives [Member] | General and Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		12	35		35	73
Restructuring and Related Cost, Cost Incurred to Date		236			236
2015 and Snyder's-Lance Initiatives [Member] | Cost Of Products Sold [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		4	14		25	20
Restructuring and Related Cost, Cost Incurred to Date		74			74
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	2		6	2
Restructuring and Related Cost, Cost Incurred to Date		9			9
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	0		2	0
Restructuring and Related Cost, Cost Incurred to Date		$ 2			$ 2
Snyder's-Lance Cost Transformation Program and Integration [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			10			10
Snyder's-Lance Cost Transformation Program and Integration [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date								$ 13
Snyder's-Lance Cost Transformation Program and Integration [Member] | General and Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			$ 6			$ 6
Snyder's-Lance Cost Transformation Program and Integration [Member] | General and Administrative Expense [Member] | Implementation Costs and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date								$ 12

[1] Includes $10 of Restructuring charges and $6 of Administrative expenses in the three- and nine-month periods ended April 29, 2018 associated with the Snyder's-Lance cost transformation program and integration.

[2] Includes $13 of Restructuring charges and $12 of Administrative expenses associated with the Snyder's-Lance cost transformation program and integration recognized in 2018.

[3] Includes $13 of charges associated with the Snyder's-Lance cost transformation program and integration recognized in 2018.

[4] Includes other costs recognized as incurred that are not reflected in the restructuring reserve in the Consolidated Balance Sheets. The costs are included in Administrative expenses, Cost of products sold, Marketing and selling expenses, and Research and development expenses in the Consolidated Statements of Earnings.

[5] Includes $12 of charges associated with the Snyder's-Lance cost transformation program and integration recognized in 2018.

[6] Includes $4 of Severance pay and benefits and $4 of Implementation costs and other related costs.