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Equity - Dividend Restrictions, Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2021
Class of Stock [Line Items] |  |
Percent of insurer's policyholder surplus available for dividends | 10.00% |
Statutory Dividend Payment Restrictions Disclosure | There are no current restrictions on HFSG Holding Company's ability to pay dividends to its stockholders. |
HLA |  |
Class of Stock [Line Items] |  |
Proceeds from Dividends Received | $ 350 |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval | 295 |
P&C Subsidiaries |  |
Class of Stock [Line Items] |  |
Proceeds from Dividends Received | 900 |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval | 1,700 |
Mutual Fund [Member] |  |
Class of Stock [Line Items] |  |
Proceeds from Dividends Received | 127 |
Harford Holdings, Inc. [Member] |  |
Class of Stock [Line Items] |  |
Proceeds from Dividends Received | 78 |
P&C Runoff Subsidiaries |  |
Class of Stock [Line Items] |  |
Proceeds from Dividends Received | $ 50 |
Minimum | HLA | Scenario, Forecast |  |
Class of Stock [Line Items] |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval |  | $ 250
Minimum | P&C Subsidiaries | Scenario, Forecast |  |
Class of Stock [Line Items] |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval |  | 850
Maximum | HLA | Scenario, Forecast |  |
Class of Stock [Line Items] |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval |  | 295
Maximum | P&C Subsidiaries | Scenario, Forecast |  |
Class of Stock [Line Items] |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval |  | $ 900

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