Restructuring Charges and Cost Savings Initiatives (Narrative) (Details) $ / shares in Units, $ in Millions		3 Months Ended								12 Months Ended
		Jul. 31, 2016 USD ($) $ / shares	May 01, 2016 USD ($) $ / shares	Jan. 31, 2016 USD ($) $ / shares	Nov. 01, 2015 USD ($) $ / shares	Aug. 02, 2015 USD ($) $ / shares	May 03, 2015 USD ($) $ / shares	Feb. 01, 2015 USD ($) $ / shares	Nov. 02, 2014 USD ($) $ / shares	Jul. 31, 2016 USD ($) $ / shares	Aug. 02, 2015 USD ($) $ / shares	Aug. 03, 2014 USD ($) $ / shares
Restructuring Cost and Reserve [Line Items]
Restructuring charges										$ 31	$ 102	$ 55
Restructuring charges, after tax		$ 7	$ 9	$ 10	$ 23	$ 67	$ 11	$ 0	$ 0
Restructuring charges, Per Diluted Share | $ / shares		$ 0.02	$ 0.03	$ 0.03	$ 0.07	$ 0.21	$ 0.04	$ 0.00	$ 0.00
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost												3
Corporate, Non-Segment [Member] | Other Cost Savings Implementation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										$ 47	22
2015 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated										250
Restructuring charges										$ 35	102
Restructuring charges and related costs, after tax										$ 52	$ 78
Restructuring charges, Per Diluted Share | $ / shares										$ 0.17	$ 0.25
Restructuring and Related Cost, Incurred Cost										$ 82	$ 124
2015 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										34	87
2015 Initiatives [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										$ 1	8
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										$ 17
Restructuring and Related Cost, Expected Cost Allocation		30.00%								30.00%
2015 Initiatives [Member] | Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										$ 22
Restructuring and Related Cost, Expected Cost Allocation		32.00%								32.00%
2015 Initiatives [Member] | Campbell Fresh [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										$ 1
Restructuring and Related Cost, Expected Cost Allocation		3.00%								3.00%
2015 Initiatives [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										$ 42
Restructuring and Related Cost, Expected Cost Allocation		35.00%								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	[1]									$ 47	$ 22
2015 Initiatives [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		$ 250								250
2015 Initiatives [Member] | Minimum [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		135								135
2015 Initiatives [Member] | Minimum [Member] | Implementation and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		115								115
2015 Initiatives [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		300								300
2015 Initiatives [Member] | Maximum [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		145								145
2015 Initiatives [Member] | Maximum [Member] | Implementation and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		$ 155								$ 155
2014 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Positions eliminated										85
Restructuring charges										$ (4)		54
Restructuring charges, after tax										$ (3)		$ 33
Restructuring charges, Per Diluted Share | $ / shares										$ (0.01)		$ 0.10
Restructuring and Related Cost, Incurred Cost										$ (4)
2014 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges										(4)		$ 41
2014 Initiatives [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	[2]									$ 0		1
2014 Initiatives [Member] | AUSTRALIA
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated										45
2014 Initiatives [Member] | North America and Asia Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Positions eliminated										250
2014 Initiatives [Member] | CHINA
Restructuring Cost and Reserve [Line Items]
Positions eliminated										100
2014 Initiatives [Member] | Americas Simple Meals and Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										$ (1)
2014 Initiatives [Member] | Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										(3)
2014 Initiatives [Member] | Campbell Fresh [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										0
2014 Initiatives [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost										$ 0
2013 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges												1
Restructuring charges and related costs, after tax												$ 3
Restructuring charges, Per Diluted Share | $ / shares												$ 0.01
2013 Initiatives [Member] | Cost Of Products Sold [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost												$ 3

[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.

[2] Includes non-cash costs that are not reflected in the restructuring reserve in the Consolidated Balance Sheet.