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Insurance Company Regulatory Requirements - Narrative (Details) € in Millions, £ in Millions, $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 USD ($) | Mar. 31, 2025 USD ($) | Dec. 31, 2024 GBP (£) | Dec. 31, 2024 USD ($) | Dec. 31, 2024 EUR (€) | Dec. 31, 2023 GBP (£) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 EUR (€)
AGUK |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |
Own funds |  |  | £ 439 | $ 549.0 |  | £ 528 | $ 672.0 |
AGE |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |
Own funds |  |  |  | 36.0 | € 35 |  | $ 49.0 | € 44
AG (U.S. domiciled) | Maryland |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |
Threshold for dividend payments as a percentage of policyholder surplus | 10.00% |  |  |  |  |  |  |
Threshold for dividend payments, percentage of adjusted net investment income | 100.00% |  |  |  |  |  |  |
Amount available for distribution, current year |  |  |  | 287.0 |  |  |  |
AG (U.S. domiciled) | Maryland | Forecast |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |
Amount available for distribution, next fiscal quarter |  | $ 71.8 |  |  |  |  |  |
Amount available for distribution, next fiscal quarter, percent |  | 25.00% |  |  |  |  |  |
AG Re | Bermuda |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |
Amount available for distribution, current year |  |  |  | 272.0 |  |  |  |
Dividend payment restrictions, percentage of statutory capital | 15.00% |  |  |  |  |  |  |
Dividend restrictions on statutory capital and surplus (as a percent) | 25.00% |  |  |  |  |  |  |
Capital distributions | $ 129.0 |  |  |  |  |  |  |
Statutory surplus |  |  |  | 272.0 |  |  |  |
Unencumbered assets |  |  |  | 192.0 |  |  |  |
Statutory amount available for dividend payments, deficit |  |  |  | 229.0 |  |  |  |
AGRO | Bermuda |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |
Amount available for distribution, current year |  |  |  | 113.0 |  |  |  |
Capital distributions | $ 21.0 |  |  |  |  |  |  |
Statutory surplus |  |  |  | 113.0 |  |  |  |
Unencumbered assets |  |  |  | 397.0 |  |  |  |
Statutory amount available for dividend payments |  |  |  | $ 315.0 |  |  |  |

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