DERIVATIVES - Offsetting of Financial Assets and Liabilities and Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivative
Assets:
Gross Amount Recognized	$ 10,208	$ 8,024
Gross Amount Offset in the Balance Sheets	6,793	6,980
Net Amount Presented in the Balance Sheets	3,415	1,044
Gross Amount not Offset in the Balance Sheets	(3,047)	(848)
Net Amount	368	196
Liabilities:
Gross Amount Recognized	7,410	7,577
Gross Amount Offset in the Balance Sheets	6,793	6,980
Net Amount Presented in the Balance Sheets	617	597
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	617	597
Secured lending
Assets:
Gross Amount Recognized	86	0
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	86	0
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	86	0
Liabilities:
Gross Amount Recognized	86	0
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	86	0
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	86	0
Other financial assets
Assets:
Gross Amount Recognized	1,995	1,791
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	1,995	1,791
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	1,995	1,791
Other invested assets
Assets:
Gross Amount Recognized	12,289	9,815
Gross Amount Offset in the Balance Sheets	6,793	6,980
Net Amount Presented in the Balance Sheets	5,496	2,835
Gross Amount not Offset in the Balance Sheets	(3,047)	(848)
Net Amount	2,449	1,987
Other financial liabilities
Liabilities:
Gross Amount Recognized	2,660	2,081
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	2,660	2,081
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	2,660	2,081
Other liabilities
Liabilities:
Gross Amount Recognized	10,156	9,658
Gross Amount Offset in the Balance Sheets	6,793	6,980
Net Amount Presented in the Balance Sheets	3,363	2,678
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	$ 3,363	$ 2,678