Restructuring Charges and Cost Savings Initiatives (Narrative) (Details) $ in Millions		12 Months Ended			25 Months Ended
		Jul. 30, 2017 USD ($)	Jul. 31, 2016 USD ($)	Aug. 02, 2015 USD ($)	Aug. 25, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 18	$ 31	$ 102
Payments to Acquire Property, Plant, and Equipment		338	341	380
Americas Simple Meals and Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment		117	105	137
Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment		127	122	137
Campbell Fresh [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment		47	74	82
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment	[1]	47	40	24
2015 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		18	35	$ 102
Payments to Acquire Property, Plant, and Equipment		$ 10
2015 Initiatives [Member] | Americas Simple Meals and Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation		30.00%
2015 Initiatives [Member] | Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation		38.00%
2015 Initiatives [Member] | Campbell Fresh [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation		4.00%
2015 Initiatives [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation		28.00%
2015 Initiatives [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment					$ 180
2015 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		$ 135
2015 Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		20
2015 Initiatives [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		380
Effect on Future Cash Flows, Amount		350
2015 Initiatives [Member] | Minimum [Member] | Implementation and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		225
2015 Initiatives [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		420
Effect on Future Cash Flows, Amount		390
2015 Initiatives [Member] | Maximum [Member] | Implementation and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		$ 265
2015 Initiatives [Member] | UNITED STATES
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated		471
2014 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			(4)
2014 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			(4)
2014 Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 0

[1] Represents primarily corporate offices.