Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Aug. 02, 2020	Jul. 28, 2019	Jul. 29, 2018
Income Statement [Abstract]
Net sales		$ 8,691	$ 8,107	$ 6,615
Costs and expenses
Cost of products sold		5,692	5,414	4,241
Marketing and selling expenses		947	842	728
Administrative expenses		622	610	563
Research and development expenses		93	91	91
Other expenses / (income)		221	140	(73)
Restructuring charges		9	31	55
Total costs and expenses		7,584	7,128	5,605
Earnings before interest and taxes		1,107	979	1,010
Interest expense		345	356	183
Interest income		4	2	3
Earnings before taxes		766	625	830
Taxes on earnings		174	151	106
Earnings from continuing operations		592	474	724
Earnings (loss) from discontinued operations		1,036	(263)	(463)
Net earnings		1,628	211	261
Less: Net earnings (loss) attributable to noncontrolling interests		0	0	0
Net earnings attributable to Campbell Soup Company		$ 1,628	$ 211	$ 261
Per Share - Basic
Earnings from continuing operations attributable to Campbell Soup Company		$ 1.96	$ 1.57	$ 2.41
Earnings (loss) from discontinued operations		3.43	(0.87)	(1.54)
Net earnings attributable to Campbell Soup Company		$ 5.39	$ 0.70	$ 0.87
Weighted average shares outstanding - basic		302	301	301
Per Share - Assuming Dilution
Earnings from continuing operations attributable to Campbell Soup Company		$ 1.95	$ 1.57	$ 2.40
Earnings (loss) from discontinued operations		3.41	(0.87)	(1.53)
Net earnings attributable to Campbell Soup Company	[1]	$ 5.36	$ 0.70	$ 0.86
Weighted average shares outstanding - assuming dilution		304	302	302

[1] Sum of the individual amounts may not add due to rounding.