Allowance for Expected Credit Losses on Premiums Receivable (Details) - USD ($) $ in Millions |
6 Months Ended | |||||
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Jun. 30, 2026 |
Jun. 30, 2025 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
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| Credit Loss [Abstract] | ||||||
| Premium Receivable, Allowance for Credit Loss | $ 26.9 | $ 27.6 | $ 26.9 | $ 26.1 | $ 27.0 | $ 26.8 |
| Premiums Receivable, Gross | 746.7 | 691.7 | $ 727.4 | $ 579.5 | $ 631.8 | $ 584.1 |
| Premium Receivable, Credit Loss Expense (Reversal) | $ 0.8 | $ 0.8 | ||||
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- References No definition available.
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- Definition Amount of expense (reversal of expense) for expected credit loss on premium receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The carrying value as of the balance sheet date of the estimated valuation allowance to reduce gross premiums receivable to net realizable value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Gross amount, as of the balance sheet date, due the entity from (a) agents and insureds, (b) uncollected premiums and (c) others, before deducting the allowance for doubtful accounts. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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