Restructuring Charges and Cost Savings Initiatives (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended			15 Months Ended	42 Months Ended
		Apr. 29, 2018	Apr. 30, 2017	Apr. 29, 2018	Apr. 30, 2017	Jul. 30, 2017	Jul. 31, 2016	Aug. 02, 2015	Apr. 29, 2018	Aug. 02, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 24	$ 0	$ 59	$ 0
Payments to Acquire Property, Plant, and Equipment				223	195
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		46	7	90	18
2015 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		14	0	49	0	$ 18	$ 35	$ 102
Restructuring and Related Cost, Incurred Cost		60	7	139	18	58	82	124
Payments to Acquire Property, Plant, and Equipment									$ 56
2015 Initiatives [Member] | Americas Simple Meals and Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ 16		$ 56
Restructuring and Related Cost, Expected Cost Allocation		43.00%		43.00%					43.00%
2015 Initiatives [Member] | Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ 36		$ 63
Restructuring and Related Cost, Expected Cost Allocation		31.00%		31.00%					31.00%
2015 Initiatives [Member] | Campbell Fresh [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ 1		$ 4
Restructuring and Related Cost, Expected Cost Allocation		4.00%		4.00%					4.00%
2015 Initiatives [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ 7		$ 16
Restructuring and Related Cost, Expected Cost Allocation		22.00%		22.00%					22.00%
2015 Initiatives [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment										$ 250
2015 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost				$ 43
Restructuring and Related Cost, Expected Cost		$ 180		180					$ 180
2015 Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost				19
Restructuring and Related Cost, Expected Cost		90		90					90
2015 Initiatives [Member] | Implementation and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	[1]			72
2015 Initiatives [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		535		535					535
Effect on Future Cash Flows, Amount				435
2015 Initiatives [Member] | Minimum [Member] | Implementation and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		265		265					265
2015 Initiatives [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		580		580					580
Effect on Future Cash Flows, Amount				480
2015 Initiatives [Member] | Maximum [Member] | Implementation and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		310		310					$ 310
2015 Initiatives [Member] | Administrative expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		30	$ 7	68	$ 18	$ 36	$ 47	$ 22
Snyder's-Lance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		10
Restructuring and Related Cost, Incurred Cost				16
Snyder's-Lance Initiatives [Member] | Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		16
Snyder's-Lance Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost				10
Snyder's-Lance Initiatives [Member] | Implementation and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	[2]			$ 6
Snyder's-Lance Initiatives [Member] | Administrative expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ 6

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

[2] Includes other costs recognized as incurred that are not reflected in the restructuring reserve in the Consolidated Balance Sheet. The costs are included in Administrative expenses in the Consolidated Statements of Earnings.