Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Apr. 29, 2018	Apr. 30, 2017	Apr. 29, 2018	Apr. 30, 2017
Income Statement [Abstract]
Net sales	$ 2,125	$ 1,853	$ 6,466	$ 6,226
Costs and expenses
Cost of products sold	1,507	1,188	4,299	3,899
Marketing and selling expenses	232	212	679	682
Administrative expenses	163	142	477	408
Research and development expenses	27	28	84	80
Other expenses / (income)	647	(15)	688	197
Restructuring charges	24	0	59	0
Total costs and expenses	2,600	1,555	6,286	5,266
Earnings (loss) before interest and taxes	(475)	298	180	960
Interest expense	44	29	107	87
Interest income	2	1	3	3
Earnings (loss) before taxes	(517)	270	76	876
Taxes on earnings	(124)	94	(91)	307
Net earnings (loss)	(393)	176	167	569
Less: Net earnings (loss) attributable to noncontrolling interests	0	0	0	0
Net earnings (loss) attributable to Campbell Soup Company	$ (393)	$ 176	$ 167	$ 569
Per Share - Basic
Net earnings (loss) attributable to Campbell Soup Company	$ (1.31)	$ 0.58	$ 0.55	$ 1.86
Dividends	$ 0.35	$ 0.35	$ 1.05	$ 1.05
Weighted average shares outstanding - basic	301	304	301	306
Per Share - Assuming Dilution
Net earnings attributable to Campbell Soup Company	$ (1.31)	$ 0.58	$ 0.55	$ 1.85
Weighted average shares outstanding - assuming dilution	301	306	302	308