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Fair Value Measures - Changes in Fair Value Included in Earnings - Fair Value Option (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Weighted-average life |  | 7 years 5 months 8 days
Loans held-for-sale |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Change in fair value included in earnings | $ (25) | $ 4

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