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Deferred Acquisition Costs and Other Actuarial Balances - Unearned Revenue Liability (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Actuarial Balances
Total unearned revenue liability	$ 527.5	$ 515.4
Universal life | Benefits and Protection | Life Insurance
Other Actuarial Balances
Total unearned revenue liability	$ 527.5	510.1	$ 485.5
Other balances
Other Actuarial Balances
Total unearned revenue liability		$ 5.3

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- Definition

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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No definition available.

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