Segment Information (Schedule Of Segment Reporting - Earnings Before Interest And Taxes) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jan. 31, 2021	Jan. 26, 2020	Jan. 31, 2021	Jan. 26, 2020
Segment Reporting Information [Line Items]
Earnings before interest and taxes		$ 401	$ 350	$ 862	$ 667
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		30	11	34	11
Net loss on sale of business				0	972
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes		258	242	591	524
Snacks [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes		144	136	283	261
Corporate
Segment Reporting Information [Line Items]
Earnings before interest and taxes	[1]	17	(21)	7	(108)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		30	11	34	11
Net loss on sale of business					(64)
Restructuring and Related Cost, Incurred Cost		(4)	(18)	(9)	(26)
Corporate | Restructuring Charges [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	[2]	$ (18)	$ (7)	$ (19)	$ (10)

[1] Represents unallocated items. Pension benefit settlement adjustments are included in Corporate. There were settlement gains of $30 and $34 in the three- and six-month periods ended January 31, 2021, and $11 in the three- and six-month periods ended January 26, 2020. A loss of $64 on the sale of our European chips business was included in the six-month period ended January 26, 2020. Costs related to the cost savings initiatives were $4 and $18 in the three-month periods and $9 and $26 in the six-month periods ended January 31, 2021, and January 26, 2020, respectively.

[2] See Note 7 for additional information.