DERIVATIVES - Offsetting of Financial Assets and Liabilities and Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative
Assets
Gross Amount Recognized	$ 31	$ 26
Gross Amount Offset in the Balance Sheets	5	8
Net Amount Presented in the Balance Sheets	26	18
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	26	18
Liabilities
Gross Amount Recognized	5	8
Gross Amount Offset in the Balance Sheets	5	8
Net Amount Presented in the Balance Sheets	0	0
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	0	0
Other financial instruments
Assets
Gross Amount Recognized	1	1
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	1	1
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	1	1
Other invested assets
Assets
Gross Amount Recognized	32	27
Gross Amount Offset in the Balance Sheets	5	8
Net Amount Presented in the Balance Sheets	27	19
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	27	19
Other financial liabilities
Liabilities
Gross Amount Recognized	142	42
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	142	42
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	142	42
Other liabilities
Liabilities
Gross Amount Recognized	147	50
Gross Amount Offset in the Balance Sheets	5	8
Net Amount Presented in the Balance Sheets	142	42
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	$ 142	$ 42