AFS and HTM Debt Securities, Income Statement Impacts (Details) - USD ($) $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| AFS And HTM Debt Securities [Abstract] | |||||
| Debt securities, held-to-maturity, sold, realized gain (loss) | $ 0 | $ 0 | $ 0 | ||
| Available For Sale and Held To Maturity Debt Securities Income Statement Impacts [Abstract] | |||||
| Interest income, Available-for-sale | 8,841 | 6,489 | 5,202 | ||
| Interest income, Held-to-maturity | 5,134 | 6,512 | 7,118 | ||
| Total interest income | [1] | 13,975 | 13,001 | 12,320 | |
| Provision for credit losses, Available-for-sale | 5 | 44 | (26) | ||
| Provision for credit losses, Held-to-maturity | 1 | 1 | 7 | ||
| Total provision for credit losses | 6 | 45 | (19) | ||
| Gross realized gains | 32 | 32 | 37 | ||
| Gross realized losses | (176) | (952) | (27) | ||
| Net realized gains (losses) | $ (144) | $ (920) | $ 10 | ||
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