DERIVATIVES - Offsetting of Financial Assets and Liabilities and Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivatives
Assets
Gross Amount Recognized	$ 11,151	$ 12,358
Gross Amount Offset in the Balance Sheets	10,611	10,756
Net Amount Presented in the Balance Sheets	540	1,602
Gross Amount not Offset in the Balance Sheets	0	(961)
Net Amount	540	641
Liabilities
Gross Amount Recognized	10,754	10,770
Gross Amount Offset in the Balance Sheets	10,611	10,756
Net Amount Presented in the Balance Sheets	143	14
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	143	14
Other financial assets
Assets
Gross Amount Recognized	2,085	1,989
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	2,085	1,989
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	2,085	1,989
Other invested assets
Assets
Gross Amount Recognized	13,236	14,347
Gross Amount Offset in the Balance Sheets	10,611	10,756
Net Amount Presented in the Balance Sheets	2,625	3,591
Gross Amount not Offset in the Balance Sheets	0	(961)
Net Amount	2,625	2,630
Other financial liabilities
Liabilities
Gross Amount Recognized	3,887	3,919
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	3,887	3,919
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	3,887	3,919
Other liabilities
Liabilities
Gross Amount Recognized	14,641	14,689
Gross Amount Offset in the Balance Sheets	10,611	10,756
Net Amount Presented in the Balance Sheets	4,030	3,933
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	$ 4,030	$ 3,933