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Catastrophe Reinsurance - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Liability for Catastrophe Claims [Line Items]
Catastrophic events classification by amount	$ 25,000,000.0
Incurred losses and LAE related to prior year (favorable) adverse development	22,600,000		$ (14,600,000)
Non-Core Operations
Liability for Catastrophe Claims [Line Items]
Incurred losses and LAE related to prior year (favorable) adverse development		$ 24,800,000
Catastrophe
Liability for Catastrophe Claims [Line Items]
Incurred losses and LAE related to prior year (favorable) adverse development	6,000,000.0	(9,100,000)	(4,100,000)
Catastrophe | Non-Core Operations
Liability for Catastrophe Claims [Line Items]
Incurred losses and LAE related to prior year (favorable) adverse development	5,400,000	(7,600,000)	(6,200,000)
Catastrophe | Life Insurance | Operating Segments
Liability for Catastrophe Claims [Line Items]
Incurred losses and LAE related to prior year (favorable) adverse development	(100,000)	800,000	1,500,000
Catastrophe | Specialty Property & Casualty Insurance | Operating Segments
Liability for Catastrophe Claims [Line Items]
Incurred losses and LAE related to prior year (favorable) adverse development	$ 700,000	$ (2,300,000)	$ 600,000

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Loss Threshold For Catastrophic Events Classification by ISO

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section S99
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-Publisher FASB
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Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480046/944-40-55-7

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-Publisher FASB
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