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Investments - Net Unrealized Gains and Losses on Available-for-Sale Securities and Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Net Unrealized Gains and Losses on Available-for-Sale Securities and Derivative Instruments
Net unrealized losses on fixed maturities, available-for-sale	$ (5,942.5)	$ (5,143.0)
Net unrealized gains (losses) on derivative instruments	66.1	(1.6)
Adjustments for assumed changes in amortization patterns	5.1	(5.2)
Adjustments for assumed changes in policyholder liabilities	12.2	1.4
Net unrealized gains (losses) on other investments and noncontrolling interest adjustments	(52.5)	43.1
Provision for deferred income tax benefits	1,270.5	1,088.4
Net unrealized losses on available-for-sale securities and derivative instruments	$ (4,641.1)	$ (4,016.9)

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- Definition

This item represents the cumulative net unrealized gains/losses adjustment related to deferred acquisition costs, sales inducements and unearned revenue reserves.

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No definition available.

+ Details

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- Definition

This item represents the cumulative net unrealized gains/losses adjustment related to changes in policyholder benefits and claims and changes in the policyholder dividend obligation.

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No definition available.

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- Definition

The cumulative net unrealized gains/losses on fixed maturities available-for-sale, equity securities available-for-sale and derivative instruments net of adjustments related to deferred acquisition costs, sales inducements, unearned revenue reserves, changes in policyholder benefits and claims and applicable income taxes.

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No definition available.

+ Details

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- References

No definition available.

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- Definition

This item represents the cumulative net unrealized gains and losses on fixed maturities available-for-sale, excluding hedged portions of those in fair value hedging.

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No definition available.

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- Definition

This item represents the cumulative net unrealized gains/losses on derivatives in qualifying cash flow hedges.

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No definition available.

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- Definition

This item represents the cumulative net unrealized gains/losses on other investments and net unrealized gains/losses attributable to noncontrolling interests.

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No definition available.

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- Definition

This item represents the applicable deferred income tax impacts of cumulative net unrealized gains/losses on fixed maturities available-for-sale, equity securities available-for-sale and derivative instruments net of adjustments related deferred acquisition costs, sales inducements, unearned revenue reserves, and changes in policyholder benefits and claims.

+ References

No definition available.

+ Details

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