Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Apr. 26, 2020	Apr. 28, 2019	Apr. 26, 2020	Apr. 28, 2019
Income Statement [Abstract]
Net sales		$ 2,238	$ 1,953	$ 6,583	$ 6,327
Costs and expenses
Cost of products sold		1,466	1,298	4,331	4,240
Marketing and selling expenses		239	215	682	647
Administrative expenses		154	150	436	444
Research and development expenses		25	23	69	66
Other expenses / (income)		81	20	115	12
Restructuring charges		0	2	10	22
Total costs and expenses		1,965	1,708	5,643	5,431
Earnings before interest and taxes		273	245	940	896
Interest expense		55	89	284	271
Interest income		0	0	3	1
Earnings before taxes		218	156	659	626
Taxes on earnings		52	33	153	147
Earnings from continuing operations		166	123	506	479
Earnings (loss) from discontinued operations		2	(39)	1,036	(260)
Net earnings		168	84	1,542	219
Less: Net earnings (loss) attributable to noncontrolling interests		0	0	0	0
Net earnings attributable to Campbell Soup Company		$ 168	$ 84	$ 1,542	$ 219
Per Share - Basic
Earnings from continuing operations attributable to Campbell Soup Company		$ 0.55	$ 0.41	$ 1.68	$ 1.59
Earnings (loss) from discontinued operations		0.01	(0.13)	3.43	(0.86)
Net earnings attributable to Campbell Soup Company		$ 0.56	$ 0.28	$ 5.11	$ 0.73
Weighted average shares outstanding - basic		302	301	302	301
Per Share - Assuming Dilution
Earnings from continuing operations attributable to Campbell Soup Company		$ 0.55	$ 0.41	$ 1.66	$ 1.59
Earnings (loss) from discontinued operations		0.01	(0.13)	3.41	(0.86)
Net earnings attributable to Campbell Soup Company	[1]	$ 0.55	$ 0.28	$ 5.07	$ 0.73
Weighted average shares outstanding - assuming dilution		304	302	304	302

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