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Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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IRLCs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Notional amount | $ 189 | $ 62
Forward contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Notional amount | $ 232 | $ 90

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