Financial Instruments (Schedule of Cash Flow Hedges in Statements of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 26, 2025	Jan. 28, 2024	Jan. 26, 2025	Jan. 28, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Cost of products sold	$ 1,866	$ 1,680	$ 3,771	$ 3,410
Interest expense	88	46	175	95
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	(1)	(2)	(1)	(2)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 0	$ 1	$ 1	$ 1