Restructuring Charges and Cost Savings Initiatives (Schedule Of Pre-Tax Charges) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 28, 2019	Jul. 29, 2018		Jul. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 31	$ 55		$ 11
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		31	55		11
Restructuring and Related Cost, Incurred Cost		121	202	[1]	48
Restructuring and Related Cost, Cost Incurred to Date	[1]	572
2015 and Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		31	49
Restructuring and Related Cost, Cost Incurred to Date	[2]	205
2015 and Snyder's-Lance Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		18	33
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	[3]	304
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	8		10
Restructuring and Related Cost, Cost Incurred to Date	[4]	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		229
2015 and Snyder's-Lance Initiatives [Member] | General and Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		62	99		33
Restructuring and Related Cost, Cost Incurred to Date		263
2015 and Snyder's-Lance Initiatives [Member] | Cost Of Products Sold [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		18	45		4
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		7	3		0
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		3	0		$ 0
Restructuring and Related Cost, Cost Incurred to Date		$ 3
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] | Implementation Costs and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date			$ 12

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

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

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

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