Financial Instruments (Schedule of Cash Flow Hedges in Statements of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended
Nov. 01, 2020	Oct. 27, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Earnings (loss) from discontinued operations	$ 0	$ (3)
Interest expense	55	80
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
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] \| Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	0	0
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] \| Foreign Exchange Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Earnings (loss) from discontinued operations	0	(1)
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	$ 1

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