Financial Instruments (Schedule of Cash Flow Hedges in Statements of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 01, 2022	May 02, 2021	May 01, 2022	May 02, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Cost of products sold	$ 1,465	$ 1,356	$ 4,519	$ 4,379
Interest expense	51	53	144	163
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Cost Of Products Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	0	0	0	0
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	0	0	0	0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cost of products sold	(4)	2	(5)	4
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 0	$ 0	$ 1	$ 1