Fair Value Measurements - Schedule of carrying value of our long-term investments (Details) - Level 3 - USD ($) $ in Millions	12 Months Ended
Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Upward adjustments	$ 11	$ 4	$ 0
Downward adjustments, including impairments	(51)	(2)	(6)
Net adjustments	$ (40)	$ 2	$ (6)

Equity Securities Without Readily Determinable Fair Value, Downward Price Adjustment And Impairment Loss, Annual Amount

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- Definition

Equity Securities Without Readily Determinable Fair Value, Upward And Downward Price Adjustments And Impairment Loss, Net, Annual Amount

+ References

No definition available.

+ Details

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- Definition

Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Subparagraph (c)
-Publisher FASB
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 2
-Subparagraph (a)
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

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