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Reinsurance and Indemnification - Florida Program (Narrative) (Details) - Florida Program $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) Contract reinstatement
Reinsurance Retention Policy [Line Items]
Catastrophe reinsurance aggregate loss limit	$ 1,100
Retention amount for catastrophe reinsurance agreement contracts	30
Traditional Market
Reinsurance Retention Policy [Line Items]
Limit of aggregate losses under aggregate excess agreement	$ 405
Contracts number | Contract	1
Number of reinstatements each year for each contract | reinstatement	1
Florida Hurricane Catastrophe Fund
Reinsurance Retention Policy [Line Items]
Limit of aggregate losses under aggregate excess agreement	$ 173
Retention percentage of reinsurance limit	90.00%
Insurance Linked Securities (ILS)
Reinsurance Retention Policy [Line Items]
Limit of aggregate losses under aggregate excess agreement	$ 516
First Event
Reinsurance Retention Policy [Line Items]
Catastrophe reinsurance aggregate loss limit	951
Retention amount for catastrophe reinsurance agreement contracts	30
First Event | Traditional Market
Reinsurance Retention Policy [Line Items]
Limit of aggregate losses under aggregate excess agreement	156
Second Event | Traditional Market
Reinsurance Retention Policy [Line Items]
Limit of aggregate losses under aggregate excess agreement	$ 66

X

- Definition

Represents the retention percentage of annual coverage limit provided by the insurance arrangement for catastrophe claims.

+ References

No definition available.

+ Details

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- Definition

Represents the number of reinstatements each year for each contract.

+ References

No definition available.

+ Details

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X

- Definition

The limit of aggregated losses per contract year beyond which coverage provided by an aggregate excess agreement applies.

+ References

No definition available.

+ Details

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X

- Definition

Catastrophe Reinsurance Aggregate Loss Limit Per Contract Year, In Excess of Layers

+ References

No definition available.

+ Details

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X

- Definition

Represents the retention amount of catastrophe reinsurance agreement contracts.

+ References

No definition available.

+ Details

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X

- Definition

Represents the number of reinsurance contracts under the agreement.

+ References

No definition available.

+ Details

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- Definition

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/2009/role/commonPracticeRef
-Topic 944
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479838/944-20-50-3

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- Details

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