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Deferred Acquisition Costs and Other Actuarial Balances - Unearned Revenue Liability Balances and Changes (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Other Actuarial Balances
Beginning balance, Unearned Revenue Liability	$ 515.4
Ending balance, Unearned Revenue Liability	521.8	$ 515.4
Universal life | Benefits and Protection | Life Insurance
Other Actuarial Balances
Beginning balance, Unearned Revenue Liability	510.1	485.5
Deferrals	14.7	56.1
Revenue recognized	(8.2)	(31.5)
Ending balance, Unearned Revenue Liability	516.6	510.1
Reinsurance impact	(219.6)	(220.8)
Balance at end of period after reinsurance	$ 297.0	$ 289.3

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Represents collected fees or other policyholder assessments, inclusive of cost of insurance charges, administrative charges and other similar fees, for services to be provided in future periods.

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Amount, after effect of reinsurance, of collected fees or other policyholder assessments, inclusive of cost of insurance charges, administrative charges and other similar fees, for services to be provided in future periods.

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Amount of the unearned revenue liability that is reinsured to another entity.

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Amount of revenue recognized that was previously included in balance of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable.

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