Financial Instruments (Offsetting Assets and Liabilities) (Details) - USD ($) $ in Millions	Jul. 30, 2023	Jul. 31, 2022
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivative Asset, Fair Value, Gross Asset	$ 20	$ 25
Derivative, Collateral, Obligation to Return Securities or Cash	(5)	(17)
Derivative Asset, Fair Value, Amount Offset Against Collateral	15	8
Derivative Liability, Fair Value, Gross Liability	6	34
Derivative, Collateral, Right to Reclaim Securities or Cash	(5)	(17)
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 1	$ 17

Derivative, Collateral, Obligation to Return Securities or Cash

No definition available.

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- Definition

Derivative, Collateral, Right to Reclaim Securities or Cash

+ References

No definition available.

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- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-22

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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-Name Accounting Standards Codification
-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483466/210-20-50-3

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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
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-Publisher FASB
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-SubTopic 20
-Topic 860
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481326/860-20-50-4D

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- Definition

Fair value, after effect of master netting arrangement and deduction of obligation to return financial collateral not offset and financial instrument subject to master netting arrangement not offset, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Includes derivative not subject to master netting arrangement or similar agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 13
-SubTopic 20
-Topic 210
-Publisher FASB
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-Name Accounting Standards Codification
-Topic 815
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-Paragraph 8
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-8

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- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

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- Definition

Fair value, after effect of master netting arrangement and deduction of obligation to return financial collateral not offset and financial instrument subject to master netting arrangement not offset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Includes derivative not subject to master netting arrangement or similar agreement.

+ References

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- References

No definition available.

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