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Investment Securities - Gains and Losses Recognized in Income from Securities (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Available-for-sale debt and other securities: |  |  |  |
Realized gains | $ 3 | $ 0 | $ 9 | $ 4
Realized losses | (3) | 0 | (9) | 0
Impairment losses | 0 | (11) | 0 | (21)
Net losses on available-for-sale debt and other securities | 0 | (11) | 0 | (17)
Net realized gains | 0 | 1 | 0 | 0
Net unrealized gains | 0 | 0 | 0 | 0
Net trading debt securities gains | 0 | 1 | 0 | 0
Equity securities: |  |  |  |
Net realized (losses) gains | 3 | 4 | (2) | 15
Net unrealized gains | 7 | 16 | 19 | 25
Net equity securities gains | 10 | 20 | 17 | 40
Total (losses) gains recognized in income from available-for-sale debt and other securities, trading debt securities and equity securities | 10 | 10 | 17 | 23
Commercial Banking Revenue and Wealth and Asset Management Revenue |  |  |  |
Equity securities: |  |  |  |
Total (losses) gains recognized in income from available-for-sale debt and other securities, trading debt securities and equity securities | $ 5 | $ 7 | $ 11 | $ 9

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