INVESTMENTS - Equity Securities (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended |
---|---|---|
Sep. 30, 2021 |
Sep. 30, 2021 |
|
Investments, Debt and Equity Securities [Abstract] | ||
Net investment gains (losses) recognized during the period on securities held at the end of the period | $ (1) | $ 19 |
Net investment gains (losses) recognized on securities sold during the period | (3) | 1 |
Unrealized and realized gains (losses) on equity securities | $ (4) | $ 20 |