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Business Combinations - Deferred Tax Liability (Details) - USD ($) $ in Millions | Jan. 31, 2021 | Dec. 03, 2020 | Jul. 31, 2020
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Long-term deferred income tax liabilities | $ (580) |  | $ (2)
Credit Karma |  |  |
Business Acquisition [Line Items] |  |  |
Intangibles |  | $ (847) |
Federal and state net operating loss carryforwards |  | 135 |
Federal research and experimentation credit carryforwards |  | 45 |
Other, net |  | 35 |
Long-term deferred income tax liabilities |  | $ (632) |

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