Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 28, 2018	Jan. 29, 2017
Income Statement [Abstract]
Net sales	$ 2,180	$ 2,171	$ 4,341	$ 4,373
Costs and expenses
Cost of products sold	1,414	1,360	2,792	2,711
Marketing and selling expenses	228	240	447	470
Administrative expenses	165	141	314	266
Research and development expenses	27	25	57	52
Other expenses / (income)	70	201	41	212
Restructuring charges	33	(1)	35	0
Total costs and expenses	1,937	1,966	3,686	3,711
Earnings before interest and taxes	243	205	655	662
Interest expense	32	29	63	58
Interest income	0	1	1	2
Earnings before taxes	211	177	593	606
Taxes on earnings	(74)	76	33	213
Net earnings	285	101	560	393
Less: Net earnings (loss) attributable to noncontrolling interests	0	0	0	0
Net earnings attributable to Campbell Soup Company	$ 285	$ 101	$ 560	$ 393
Per Share - Basic
Net earnings attributable to Campbell Soup Company	$ 0.95	$ 0.33	$ 1.86	$ 1.28
Dividends	$ 0.35	$ 0.35	$ 0.70	$ 0.70
Weighted average shares outstanding - basic	301	306	301	307
Per Share - Assuming Dilution
Net earnings attributable to Campbell Soup Company	$ 0.95	$ 0.33	$ 1.85	$ 1.27
Weighted average shares outstanding - assuming dilution	301	309	302	309