Segment Information (Schedule Of Segment Reporting - Earnings Before Interest And Taxes) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Apr. 26, 2020	Apr. 28, 2019	Apr. 26, 2020	Apr. 28, 2019
Segment Reporting Information [Line Items]
Earnings before interest and taxes		$ 273	$ 245	$ 940	$ 896
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), (Gain) Loss Due to Settlement		54	28	43	28
Investment (gains) / losses				49	0
Net (gain) loss on sale of business				975	(18)
Pension Plan [Member]
Segment Reporting Information [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), (Gain) Loss Due to Settlement		54	28	43	28
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes		275	204	799	747
Snacks [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes		154	129	415	386
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	[1]	(156)	(86)	(264)	(215)
Net (gain) loss on sale of business				(64)
Restructuring and Related Cost, Incurred Cost		(14)	(19)	(40)	(68)
Corporate, Non-Segment [Member] | Acre Venture Partners [Member]
Segment Reporting Information [Line Items]
Investment (gains) / losses		45		45
Corporate, Non-Segment [Member] | Pension Plan [Member]
Segment Reporting Information [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), (Gain) Loss Due to Settlement		54	28	43	28
Restructuring Charges [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	[2]	$ 0	$ (2)	$ (10)	$ (22)

[1] Represents unallocated items. Pension benefit settlement adjustments are included in Corporate. There were settlement charges of $54 and $43 for the three- and nine-month periods ended April 26, 2020, respectively, and charges of $28 in the three- and nine-month periods ended April 28, 2019. A loss of $45 on Acre Venture Partners, L.P. (Acre) was included in the three- and nine-month periods ended April 26, 2020. See Note 14 for additional information on Acre. A loss of $64 on the sale of our European chips business was included in the nine-month period ended April 26, 2020. Costs related to the cost savings initiatives were $14 and $19 in the three-month periods and $40 and $68 in the nine-month periods ended April 26, 2020, and April 28, 2019, respectively.

[2] See Note 7 for additional information.