Investments - Schedule of Collateralized Obligations (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
|---|---|---|---|
| Schedule of Equity Method Investments [Line Items] | |||
| Cash and cash equivalents | $ 83.5 | $ 70.8 | |
| Asset Pledged as Collateral | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Cash and cash equivalents | 81.4 | $ 83.1 | |
| Total | 106.1 | 109.8 | |
| Short-term investments | Asset Pledged as Collateral | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Restricted Investments | 0.8 | 0.9 | |
| Fixed maturity securities | Asset Pledged as Collateral | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Restricted Investments | $ 23.9 | $ 25.8 |
| X | ||||||||||
- Definition Amount of cash and cash equivalent restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Cash and investments whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|