INVESTMENTS - Other Invested Assets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	$ 273	$ 106
Partnership Interest
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	93	91
Partnership Interest | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	9	10
Private equity | Partnership Interest | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	4	4
Real estate-related | Partnership Interest | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	5	6
Policy loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	11	12
Derivative instruments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	169	3
Equity Method Investments | Partnership Interest
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	84	81
Equity Method Investments | Private equity | Partnership Interest
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	16	19
Equity Method Investments | Real estate-related | Partnership Interest
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other invested assets (includes $178 and $13 of assets measured at fair value at June 30, 2022 and December 31, 2021, respectively)	$ 68	$ 62