Accumulated Other Comprehensive Income (Loss) (Schecule of amounts reclassified from AOCI) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 30, 2022	Jan. 31, 2021	Jan. 30, 2022	Jan. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of Goods and Services Sold	$ (1,540)	$ (1,496)	$ (3,054)	$ (3,023)
Interest Expense	(46)	(55)	(93)	(110)
Other Nonoperating Income (Expense)	19	45	20	63
Taxes on earnings	(65)	(102)	(133)	(199)
Net Income (Loss) Attributable to Parent	212	245	473	554
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of Goods and Services Sold	1	(2)	1	(2)
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax	0	(3)	0	(3)
Taxes on earnings	0	0	0	0
Net Income (Loss) Attributable to Parent	0	(3)	0	(3)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Commodity Derivative Contracts [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of Goods and Services Sold	2	0	3	0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Exchange Contract [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of Goods and Services Sold	(1)	(2)	(2)	(2)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest Rate Contract [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest Expense	(1)	(1)	(1)	(1)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Nonoperating Income (Expense)	1	1	1	2
Taxes on earnings	0	0	0	0
Net Income (Loss) Attributable to Parent	$ 1	$ 1	$ 1	$ 2