Restructuring Charges and Cost Savings Initiatives (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended			12 Months Ended
	Oct. 30, 2016 USD ($) $ / shares		Nov. 01, 2015 USD ($) $ / shares	Jul. 31, 2016 USD ($) $ / shares	Aug. 02, 2015 USD ($) $ / shares
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1		$ 21
Corporate, Non-Segment [Member] | Other Cost Savings Implementation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 8		15
2015 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Positions eliminated	275
Restructuring charges	$ 1		21	$ 35	$ 102
Restructuring and Related Cost, Incurred Cost	9
Restructuring charges and related costs, after tax	$ 6		$ 23	$ 52	$ 78
Restructuring charges, Per Diluted Share | $ / shares	$ 0.02		$ 0.07	$ 0.17	$ 0.25
2015 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1
2015 Initiatives [Member] | UNITED STATES
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated	471
2015 Initiatives [Member] | Americas Simple Meals and Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 0
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, Incurred Cost	$ 3
Restructuring and Related Cost, Expected Cost Allocation	32.00%
2015 Initiatives [Member] | Campbell Fresh [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 0
Restructuring and Related Cost, Expected Cost Allocation	3.00%
2015 Initiatives [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 6
Restructuring and Related Cost, Expected Cost Allocation	35.00%
2015 Initiatives [Member] | General and Administrative Expense [Member] | Other Cost Savings Implementation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 8	[1]	$ 15	$ 47	$ 22
2015 Initiatives [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	250
2015 Initiatives [Member] | Minimum [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	135
2015 Initiatives [Member] | Minimum [Member] | Implementation and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	115
2015 Initiatives [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	300
2015 Initiatives [Member] | Maximum [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	145
2015 Initiatives [Member] | Maximum [Member] | Implementation and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 155

[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 in the Consolidated Statements of Earnings.