Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 28, 2024	Jul. 30, 2023	Jul. 31, 2022	Sep. 06, 2024	Mar. 12, 2024
Maximum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ (1)
Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Margin Deposit Assets	2	$ 2
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	0	0
OCI, before Reclassifications, before Tax, Attributable to Parent	$ (11)	0	$ 0
Commodity Derivative Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Maximum Length of Time Hedged in Price Risk Cash Flow Hedge	18 months
OCI, before Reclassifications, before Tax, Attributable to Parent	$ 0	0	13
Commodity Derivative Contracts [Member] | Maximum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Term of Contract	18 months
Equity Contract [Member] | Maximum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Term of Contract	12 months
Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Maximum Length of Time, Foreign Currency Cash Flow Hedge	18 months
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
OCI, before Reclassifications, before Tax, Attributable to Parent	$ 6	5	$ 4
Treasury Lock [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	0	0
Derivatives Designated As Hedges [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount					$ 1,100
Derivatives Designated As Hedges [Member] | Interest Rate Contract [Member] | Subsequent Event [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount				$ 450
Derivatives Designated As Hedges [Member] | Commodity Derivative Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	0	0
Derivatives Designated As Hedges [Member] | Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	108	125
Derivatives Not Designated As Hedges [Member] | Commodity Derivative Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	200	194
Derivatives Not Designated As Hedges [Member] | Embedded Derivative Financial Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	48	47
Derivatives Not Designated As Hedges [Member] | Equity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	71	42
Derivatives Not Designated As Hedges [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 189	$ 15
Wal-Mart Stores, Inc. [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Entity Wide Revenue, Major Customer, Percentage Of Net Sales	22.00%	22.00%	22.00%
Top Five Customers [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Entity Wide Revenue, Major Customer, Percentage Of Net Sales	47.00%