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v3.23.3

Derivative Financial Instruments - Fair Value Hedges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Fair Value Hedges |  |  |  |  |
Carrying amount of hedged asset - Active hedging relationships | $ 3,400.3 |  | $ 3,400.3 |  | $ 3,498.6
Hedged Asset, Statement of Financial Position [Extensible Enumeration] | Debt Securities, Available-for-Sale, Excluding Accrued Interest |  | Debt Securities, Available-for-Sale, Excluding Accrued Interest |  | Debt Securities, Available-for-Sale, Excluding Accrued Interest
Carrying amount of hedged asset - Discontinued hedging relationships | $ 67.8 |  | $ 67.8 |  | $ 48.8
Carrying amount of hedged asset - Active or discontinued hedging relationships | 3,468.1 |  | 3,468.1 |  | 3,547.4
Cumulative amount of fair value hedging basis adjustment - Active hedging relationships | (150.7) |  | (150.7) |  | (153.4)
Cumulative amount of fair value hedging basis adjustment - Discontinued hedging relationships | 0.3 |  | 0.3 |  | 1.3
Cumulative amount of fair value hedging basis adjustment - Active or discontinued hedging relationships | (150.4) |  | (150.4) |  | $ (152.1)
Carrying amount of hedged liability - Active hedging relationships | $ 294.8 |  | $ 294.8 |  |
Hedged Liability, Statement of Financial Position [Extensible Enumeration] | Contractholder Funds. |  | Contractholder Funds. |  | Contractholder Funds.
Carrying amount of hedged liability - Active or discontinued hedging relationships | $ 294.8 |  | $ 294.8 |  |
Cumulative amount of fair value hedging basis adjustment - Active hedging relationships | (9.4) |  | (9.4) |  |
Cumulative amount of fair value hedging basis adjustment - Active or discontinued hedging relationships | (9.4) |  | (9.4) |  |
Amortized cost basis of closed portfolio used in portfolio layer hedging relationship | 3,177.4 |  | 3,177.4 |  | $ 3,256.9
Cumulative basis adjustments associated with portfolio layer hedging relationship | (109.0) |  | (109.0) |  | (102.4)
Amount of hedged item in portfolio layer hedging relationship | 1,210.0 |  | 1,210.0 |  | $ 1,110.0
Gain (loss) from components excluded from assessment of fair value hedge effectiveness | $ (0.2) | $ 0.0 | $ (1.0) | $ 0.0 |

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