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ACCOUNTING FOR DERIVATIVES - SCHEDULE PRE-TAX GAINS (LOSSES) RECOGNIZED IN NET INCOME FOR DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Derivative [Line Items] |  |  |  |
Gains on derivatives not designated as hedging instruments | $ 38.8 | $ 59.6 | $ 179.3 | $ 79.6
Net pre-tax impact | 28.5 | 36.4 | 101.1 | (8.5)
Embedded derivatives |  |  |  |
Derivative [Line Items] |  |  |  |
Embedded derivatives related to fixed indexed annuities |  |  | (17.1) | 2.2
Embedded derivatives | Fixed indexed annuities |  |  |  |
Derivative [Line Items] |  |  |  |
Embedded derivatives related to fixed indexed annuities | 10.3 | 23.2 | 78.2 | 88.1
Net investment income from policyholder and other special-purpose portfolios | Fixed indexed call options |  |  |  |
Derivative [Line Items] |  |  |  |
Gains on derivatives not designated as hedging instruments | 38.9 | 61.3 | 179.1 | 79.9
Net realized gains (losses) | Embedded derivatives | Coinsurance agreements |  |  |  |
Derivative [Line Items] |  |  |  |
Gains on derivatives not designated as hedging instruments | $ (0.1) | $ (1.7) | $ 0.2 | $ (0.3)

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