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Income Taxes - Unrecognized tax benefits (Details) - USD ($) $ in Millions | 12 Months Ended
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Jul. 31, 2023 | Jul. 31, 2022 | Jul. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Gross unrecognized tax benefits, beginning balance | $ 216 | $ 190 | $ 101
Increases related to tax positions from prior fiscal years, including acquisitions | 11 | 9 | 69
Decreases related to tax positions from prior fiscal years | (16) | (13) | 0
Increases related to tax positions taken during current fiscal year | 38 | 31 | 31
Settlements with tax authorities | (2) | 0 | 0
Lapse of statute of limitations | (1) | (1) | (11)
Gross unrecognized tax benefits, ending balance | $ 246 | $ 216 | $ 190

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10B -Publisher FASB -URI https://asc.fasb.org//1943274/2147482525/740-10-45-10B + Details
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