Business And Geographic Segment Information (Schedule Of Segment Reporting - Earnings Before Interest And Taxes) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Apr. 26, 2020	Aug. 01, 2021		Aug. 02, 2020		Jul. 28, 2019
Segment Reporting Information [Line Items]
Earnings before interest and taxes			$ 1,545		$ 1,107		$ 979
Investment losses		$ 45	0	[1]	49	[1]	1	[1]
Loss on sales of businesses			11		(975)		32
Goodwill and Intangible Asset Impairment	[2]		0		0		(16)
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes			899		983		895
Snacks [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes			537		551		522
Corporate and Other
Segment Reporting Information [Line Items]
Earnings before interest and taxes	[3]		130		(418)		(407)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			38		(43)
Defined Benefit Plan, Actuarial Gain (Loss)			165		(121)		(122)
Investment losses					(45)
Loss on sales of businesses			(11)		(64)
Cost savings initiatives			(32)		(60)		(90)
Goodwill and Intangible Asset Impairment							(16)
Unrealized Gain (Loss) on Commodity Contracts			50
Corporate and Other | Restructuring Charges [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	[4]		$ (21)		$ (9)		$ (31)

[1] 2020 includes a loss of $45 related to Acre. See Note 14 for additional information.

[2] See Note 3 for additional information.

[3] Represents unallocated items. Pension and postretirement benefit settlement and mark-to-market adjustments are included in Corporate. There were settlement gains of $38 and gains of $165 in 2021, settlement charges of $43 and losses of $121 in 2020, and losses of $122 in 2019, respectively. A loss of $11 on the sale of the Plum baby food and snacks business was included in 2021. A loss of $45 on Acre Venture Partners, L.P. (Acre) was included in 2020. See Note 14 for additional information on Acre. A loss of $64 on the sale of our European chips business was included in 2020. Costs related to the cost savings initiatives were $32, $60 and $90 in 2021, 2020 and 2019, respectively. Intangible asset impairment charges were $16 in 2019. A mark-to-market gain on outstanding commodity hedges of $50 was included in 2021.

[4] See Note 7 for additional information.