Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Apr. 28, 2019		Apr. 29, 2018	Apr. 28, 2019		Apr. 29, 2018
Income Statement [Abstract]
Net sales	$ 2,178		$ 1,878	$ 7,129		$ 5,743
Costs and expenses
Cost of products sold	1,455		1,263	4,781		3,624
Marketing and selling expenses	245		220	738		645
Administrative expenses	165		153	492		444
Research and development expenses	26		25	74		79
Other expenses / (income)	20		35	13		(7)
Restructuring charges	1		24	21		58
Total costs and expenses	1,912		1,720	6,119		4,843
Earnings before interest and taxes	266		158	1,010		900
Interest expense	92		44	279		107
Interest income	1		2	3		3
Earnings before taxes	175		116	734		796
Taxes on earnings	44		43	184		106
Earnings from continuing operations	131		73	550		690
Loss from discontinued operations	(47)		(466)	(331)		(523)
Net earnings (loss)	84		(393)	219		167
Less: Net earnings (loss) attributable to noncontrolling interests	0		0	0		0
Net earnings (loss) attributable to Campbell Soup Company	$ 84		$ (393)	$ 219		$ 167
Per Share - Basic
Earnings from continuing operations attributable to Campbell Soup Company	$ 0.44	[1]	$ 0.24	$ 1.83	[1]	$ 2.29
Loss from discontinued operations	(0.16)		(1.55)	(1.10)		(1.74)
Net earnings (loss) attributable to Campbell Soup Company	$ 0.28		$ (1.31)	$ 0.73		$ 0.55
Weighted average shares outstanding - basic	301		301	301		301
Per Share - Assuming Dilution
Earnings from continuing operations attributable to Campbell Soup Company	$ 0.43		$ 0.24	$ 1.82		$ 2.28
Loss from discontinued operations	(0.16)		(1.55)	(1.10)		(1.73)
Net earnings (loss) attributable to Campbell Soup Company	$ 0.28		$ (1.31)	$ 0.73		$ 0.55
Weighted average shares outstanding - assuming dilution	302		301	302		302

[1] The sum of individual per share amounts may not add due to rounding.