INVESTMENT SECURITIES - Gains (Losses) Within Investment Income (Details) - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
|
Investments, Debt and Equity Securities [Abstract] | ||
Gross gains on investment securities | $ 2 | $ 0 |
Gross losses on investment securities | (1) | (61) |
Gross gains on equity securities | 0 | 1 |
Gross losses on equity securities | 0 | 0 |
Net recognized gains (losses) on investment securities | $ 1 | $ (60) |