INVESTMENT SECURITIES - Gains and Losses Related to Equity Securities (Details) - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
|
Investments, Debt and Equity Securities [Abstract] | ||
Net gains (losses) recognized on equity securities during the period | $ 0 | $ 1 |
Less: Net gains (losses) recognized on equity securities sold during the period | 0 | 1 |
Unrealized gains (losses) recognized on equity securities still held at the end of the period | $ 0 | $ 0 |