Goodwill And Intangible Assets (Goodwill) (Details) $ in Millions	3 Months Ended
	Oct. 31, 2021 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 3,981
Goodwill, Other Increase (Decrease)	0	[1]
Foreign currency translation adjustment	1
Ending Balance	3,982
Meals & Beverages [Member]
Goodwill [Line Items]
Beginning Balance	970
Goodwill, Other Increase (Decrease)	25	[1]
Foreign currency translation adjustment	1
Ending Balance	996
Snacks [Member]
Goodwill [Line Items]
Beginning Balance	3,011
Goodwill, Other Increase (Decrease)	(25)	[1]
Foreign currency translation adjustment	0
Ending Balance	$ 2,986

[1] See Note 5 for additional information.