Financial Instruments (Schedule of Cash Flow Hedges in Statements of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 29, 2023	Jan. 30, 2022	Jan. 29, 2023	Jan. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Cost of products sold	$ 1,726	$ 1,540	$ 3,467	$ 3,054
Interest expense	45	46	92	93
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cost of products sold	(3)	(1)	(7)	(1)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest Rate Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 1	$ 1	$ 1	$ 1