Restructuring Charges and Cost Savings Initiatives (Schedule Of Restructuring Charges Associated With Each Reportable Segment) (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
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ 19	$ 45		$ 68	$ 89
2015 and Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
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] | Meals and Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		7			42
Restructuring and Related Cost, Cost Incurred to Date		220			220
2015 and Snyder's-Lance Initiatives [Member] | Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		6			22
Restructuring and Related Cost, Cost Incurred to Date	[3]	198			198
2015 and Snyder's-Lance Initiatives [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		7			25
Restructuring and Related Cost, Cost Incurred to Date		138			138
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] | Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date								$ 25
General and Administrative Expense [Member] | 2015 and Snyder's-Lance Initiatives [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
General and Administrative Expense [Member] | Snyder's-Lance Cost Transformation Program and Integration [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			$ 6			$ 6

[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 $25 of pre-tax costs associated with the Global Biscuits and Snacks segment recognized in 2018 related to the Snyder's-Lance cost transformation program and integration.