Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Jan. 27, 2019		Jan. 28, 2018	Jan. 27, 2019		Jan. 28, 2018
Income Statement [Abstract]
Net sales	$ 2,713		$ 2,180	$ 5,407		$ 4,341
Costs and expenses
Cost of products sold	1,999		1,414	3,869		2,792
Marketing and selling expenses	264		228	512		447
Administrative expenses	180		165	356		314
Research and development expenses	23		27	50		57
Other expenses / (income)	226		70	230		41
Restructuring charges	2		33	21		35
Total costs and expenses	2,694		1,937	5,038		3,686
Earnings before interest and taxes	19		243	369		655
Interest expense	93		32	187		63
Interest income	1		0	2		1
Earnings (loss) before taxes	(73)		211	184		593
Taxes on earnings	(14)		(74)	49		33
Net earnings (loss)	(59)		285	135		560
Less: Net earnings (loss) attributable to noncontrolling interests	0		0	0		0
Net earnings (loss) attributable to Campbell Soup Company	$ (59)		$ 285	$ 135		$ 560
Per Share - Basic
Net earnings (loss) attributable to Campbell Soup Company	$ (0.20)	[1]	$ 0.95	$ 0.45	[1]	$ 1.86
Weighted average shares outstanding - basic	301		301	301		301
Per Share - Assuming Dilution
Net earnings attributable to Campbell Soup Company	$ (0.20)	[1]	$ 0.95	$ 0.45	[1]	$ 1.85
Weighted average shares outstanding - assuming dilution	301		301	302		302

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