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Securitizations and Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Beneficial interests in securitizations | $ 486 | $ 464
Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Beneficial interests in securitizations | $ 486 | $ 464

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