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Income Taxes - Additional information (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2019 | Jul. 31, 2018
Operating Loss Carryforwards [Line Items] |  |  |  |
Excess tax benefits related to stock-based compensation | $ 126 | $ 90 | $ 120 |
Valuation allowance | 205 | 132 |  |
Federal research and experimentation credit carryforwards | 71 |  |  |
Unrecognized tax benefits | 190 | 101 | 120 | $ 90
Favorable net impact to income tax expense due to recognition of tax benefits | 109 |  |  |
Increase in unrecognized tax benefits from acquisition | 41 |  |  |
Long term income tax receivable | 75 | 59 |  |
Domestic Country |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 216 |  |  |
State and Local Jurisdiction |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Excess tax benefits related to stock-based compensation | 21 | $ 11 | $ 14 |
Operating loss carryforwards | 304 |  |  |
Deferred tax asset net operating loss carryforward | 17 |  |  |
Valuation allowance | 4 |  |  |
Foreign Tax Authority | Her Majesty's Revenue and Customs (HMRC) |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 67 |  |  |
Foreign Tax Authority | Inland Revenue, Singapore (IRAS) |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 63 |  |  |
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 59 |  |  |
Foreign Tax Authority | Australian Taxation Office |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 2 |  |  |
Research Tax Credit Carryforward | State and Local Jurisdiction |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Deferred tax assets, tax credit carryforwards | $ 227 |  |  |

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