DERIVATIVES - FAIR VALUE BY BALANCE SHEET LOCATION (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Embedded Derivative Associated With Modified Coinsurance Agreement
Derivatives, Fair Value [Line Items]
Mark to market adjustment on embedded derivative	$ 92.0
Fixed indexed call options
Derivatives, Fair Value [Line Items]
Gross amounts recognized	56.7	$ 225.0
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Gross amounts recognized	38.9	225.8
Gross derivative liability	1,297.0	1,724.1
Not Designated as Hedging Instrument \| Fixed indexed call options \| Other invested assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	56.7	225.0
Not Designated as Hedging Instrument \| Other \| Other invested assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	0.0	2.5
Not Designated as Hedging Instrument \| Reinsurance receivables \| Reinsurance receivables
Derivatives, Fair Value [Line Items]
Gross amounts recognized	(17.8)	(1.7)
Not Designated as Hedging Instrument \| Fixed indexed products \| Fixed indexed products
Derivatives, Fair Value [Line Items]
Gross derivative liability	$ 1,297.0	$ 1,724.1

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Net fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as assets, net of those classified as liabilities.

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