Financial Instruments (Schedule of Cash Flow Hedges in Statements of Earnings) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 30, 2023	Jul. 31, 2022	Aug. 01, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cost of products sold		$ 6,440	$ 5,935	$ 5,665
Interest expense	[1]	188	189	210
Other expenses / (income)		32	21	(254)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cost of products sold		(11)	(13)	6
Interest expense		$ 1	$ 1	1
Other expenses / (income)				$ (1)

[1] In 2022, we recognized a loss of $4 million (including $3 million of premium and other costs) on the extinguishment of debt. See Note 12 for additional information.