DERIVATIVES - Offsetting of Financial Assets and Liabilities and Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative [Member]
Assets
Gross Amount Recognized	$ 12,309	$ 9,186
Gross Amount Offset in the Balance Sheets	10,724	8,206
Net Amount Presented in the Balance Sheets	1,585	980
Gross Amount not Offset in the Balance Sheets	(961)	(53)
Net Amount	624	927
Liabilities
Gross Amount Recognized	10,738	8,218
Gross Amount Offset in the Balance Sheets	10,724	8,206
Net Amount Presented in the Balance Sheets	14	12
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	14	12
Other financial assets
Assets
Gross Amount Recognized	1,325	1,403
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	1,325	1,403
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	1,325	1,403
Other invested assets
Assets
Gross Amount Recognized	13,634	10,589
Gross Amount Offset in the Balance Sheets	10,724	8,206
Net Amount Presented in the Balance Sheets	2,910	2,383
Gross Amount not Offset in the Balance Sheets	(961)	(53)
Net Amount	1,949	2,330
Other financial liabilities
Liabilities
Gross Amount Recognized	2,064	1,568
Gross Amount Offset in the Balance Sheets	0	0
Net Amount Presented in the Balance Sheets	2,064	1,568
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	2,064	1,568
Other liabilities
Liabilities
Gross Amount Recognized	12,802	9,786
Gross Amount Offset in the Balance Sheets	10,724	8,206
Net Amount Presented in the Balance Sheets	2,078	1,580
Gross Amount not Offset in the Balance Sheets	0	0
Net Amount	$ 2,078	$ 1,580