DERIVATIVES AND HEDGING - Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Offsetting of Financial Assets:
Gross Amounts of Recognized Financial Instruments	$ 827	$ 811
Counterparty Netting	(545)	(694)
Other invested assets, Netting	0	0
Net Amounts Presented in the Statement of Financial Position	282	117
Financial Instruments/Collateral	0	0
Net Amount	282	117
Derivative instruments
Offsetting of Financial Liabilities:
Gross Amounts of Recognized Financial Instruments	1,059	1,302
Counterparty Netting	(545)	(694)
Cash Collateral	(366)	(514)
Net Amounts Presented in the Statement of Financial Position	148	94
Financial Instruments/Collateral	(143)	(94)
Net Amount	5	0
Repurchase agreements
Offsetting of Financial Liabilities:
Gross Amounts of Recognized Financial Instruments	1,121	967
Counterparty Netting	0	0
Cash Collateral	0	0
Net Amounts Presented in the Statement of Financial Position	1,121	967
Financial Instruments/Collateral	(1,121)	(967)
Net Amount	0	0
Securities lending transactions
Offsetting of Financial Liabilities:
Gross Amounts of Recognized Financial Instruments	2
Counterparty Netting	0
Cash Collateral	0
Net Amounts Presented in the Statement of Financial Position	2
Financial Instruments/Collateral	(2)
Net Amount	0
Retained Business
Offsetting of Financial Assets:
Gross Amounts of Recognized Financial Instruments	533	638
Counterparty Netting	(507)	(638)
Other invested assets, Netting	0	0
Net Amounts Presented in the Statement of Financial Position	26	0
Financial Instruments/Collateral	0	0
Net Amount	26	0
Retained Business | Derivative instruments
Offsetting of Financial Liabilities:
Gross Amounts of Recognized Financial Instruments	1,016	1,246
Counterparty Netting	(507)	(638)
Cash Collateral	(366)	(514)
Net Amounts Presented in the Statement of Financial Position	143	94
Financial Instruments/Collateral	(143)	(94)
Net Amount	0	0
Ceded Business
Offsetting of Financial Assets:
Gross Amounts of Recognized Financial Instruments	294	173
Counterparty Netting	(38)	(56)
Other invested assets, Netting	0	0
Net Amounts Presented in the Statement of Financial Position	256	117
Financial Instruments/Collateral	0	0
Net Amount	256	117
Ceded Business | Derivative instruments
Offsetting of Financial Liabilities:
Gross Amounts of Recognized Financial Instruments	43	56
Counterparty Netting	(38)	(56)
Cash Collateral	0	0
Net Amounts Presented in the Statement of Financial Position	5	0
Financial Instruments/Collateral	0	0
Net Amount	$ 5	$ 0