DERIVATIVES - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Cash and securities collateral for derivative contract	$ 6,200	$ 3,800
Cash and securities collateral	178	212
S&P 500, Russell 1000, NASDAQ 100 and Emerging Market Indices
Derivative [Line Items]
Initial margin requirements	90	135
Us Treasury Notes Ultra Long Bonds And Euro Dollar
Derivative [Line Items]
Initial margin requirements	196	263
Euro Stoxx, FTSE100, Topix, ASX200 and EAFE Indices
Derivative [Line Items]
Initial margin requirements	$ 16	$ 35