Supplemental Financial Statement Data (Schedule of Statement of Earnings) (Details) - USD ($) $ in Millions		3 Months Ended				12 Months Ended
		Jul. 29, 2018	Apr. 29, 2018	Jan. 28, 2018	Oct. 29, 2017	Jul. 29, 2018		Jul. 30, 2017	Jul. 31, 2016
Amortization of Intangible Assets						$ 34		$ 19	$ 20
Impairment charges	[1]					737		212	141
Net Periodic Defined Benefits Expense (Income), Excluding Service Cost Component						(231)		(247)	274
Investment (gains) / losses						10		9	(3)
Transaction Costs		$ 8	$ 46	$ 19	$ 0	53	[2]	0	0
Legal Settlements	[3]					22		0	(25)
Other Income						(6)		(2)	(2)
Other expenses / (income)						619		(9)	405
Advertising Expense	[4]					394		389	397
Interest Costs Incurred						204		114	118
Interest Costs Capitalized Adjustment						(3)		(2)	(3)
Interest Expense						201		$ 112	$ 115
Snyder's-Lance [Member]
Transaction Costs						$ 53

[1] See Note 5 for additional information.

[2] In 2018, we recognized transaction costs of $53 related to the acquisition of Snyder's-Lance. See Note 3 for additional information.

[3] In 2018, we recognized a charge of $22 related to the settlement of a legal claim. In 2016, we recorded a gain of $25 from a settlement of a claim related to the Kelsen acquisition.

[4] Included in Marketing and selling expenses.