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Loans Receivable and Allowance for Credit Losses - Allowance for Credit Losses Narrative (Details) $ in Millions | 9 Months Ended |
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Sep. 30, 2025 USD ($) quarter | Dec. 31, 2024 USD ($)
Financing Receivable Allowance for Credit Losses |  |
Life time loss rate, period span | quarter | 8 |
Allowance for credit losses | $ 839 | $ 742
Increase in allowance for credit losses | $ 97 |

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