Accumulated Other Comprehensive Income (Loss) (Schedule of amounts reclassified from AOCI) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 30, 2023	Jul. 31, 2022	Aug. 01, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of Goods and Services Sold		$ (6,440)	$ (5,935)	$ (5,665)
Other expenses / (income)		(32)	(21)	254
Interest Expense	[1]	(188)	(189)	(210)
Taxes on earnings		(270)	(218)	(328)
Net Income (Loss) Attributable to Parent		858	757	1,002
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		11	13	(6)
Other expenses / (income)				1
Interest Expense		(1)	(1)	(1)
Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax		10	12	(8)
Taxes on earnings		(2)	(2)	1
Net Income (Loss) Attributable to Parent		8	10	(7)
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		3	14	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		8	(1)	(6)
Other expenses / (income)		0	0	(1)
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)
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	5
Taxes on earnings		0	0	(1)
Net Income (Loss) Attributable to Parent		$ 0	$ 1	$ 4

[1] In 2022, we recognized a loss of $4 million (including $3 million of premium and other costs) on the extinguishment of debt. See Note 12 for additional information.