Accumulated Other Comprehensive Income (Loss) (Schecule of amounts reclassified from AOCI) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2021	Nov. 01, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of products sold	$ 1,514	$ 1,527
Other expenses / (income)	(1)	(18)
Taxes on earnings	68	97
Net Income (Loss) Attributable to Parent	261	309
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 products sold	0	0
Earnings before taxes	0	0
Taxes on earnings	0	0
Net Income (Loss) Attributable to Parent	0	0
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 products sold	(1)	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 products sold	1	0
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 expenses / (income)	0	(1)
Taxes on earnings	0	0
Net Income (Loss) Attributable to Parent	$ 0	$ 1