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Insurance Company Regulatory Requirements (Tables) | 12 Months Ended
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Dec. 31, 2023
Insurance Company Regulatory Requirements [Abstract] |
Schedule of Statutory Capital and Surplus and Net Income | Insurance Regulatory Amounts Reported U.S. and Bermuda
| Policyholders’ Surplus |  | Net Income (Loss)
| As of December 31, |  | Year Ended December 31,
| 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2021
| (in millions)
U.S. statutory companies: |  |  |  |  |  |  |  |  |
AGM (1) | $ | 2,646 |  |  | $ | 2,747 |  |  | $ | 209 |  |  | $ | 163 |  |  | $ | 352 |
AGC (2) | 1,651 |  |  | 1,916 |  |  | 79 |  |  | 62 |  |  | 282 |
Bermuda statutory companies: |  |  |  |  |  |  |  |  |
AG Re | 905 |  |  | 839 |  |  | 95 |  |  | 53 |  |  | 121 |
AGRO | 412 |  |  | 390 |  |  | 16 |  |  | 9 |  |  | 6 |
____________________ (1) Policyholders’ surplus is net of contingency reserves of $876 million and $855 million as of December 31, 2023 and December 31, 2022, respectively. (2) Policyholders’ surplus is net of contingency reserves of $420 million and $347 million as of December 31, 2023 and December 31, 2022, respectively.
Schedule of Dividends Paid by Insurance Company Subsidiaries | Dividend Restrictions and Capital Requirements Distributions from Insurance Company Subsidiaries
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
| (in millions)
Dividends paid by AGC to AGUS | $ | 102 |  |  | $ | 207 |  |  | $ | 94 |
Dividends paid by AGM to AGMH | 257 |  |  | 266 |  |  | 291 |
Dividends paid by AG Re to AGL (1) | 53 |  |  | — |  |  | 150 |
Dividends from AGUK to AGM | 127 |  |  | — |  |  | — |
Redemption of common stock by AGC from AGUS | 200 |  |  | — |  |  | — |
____________________ (1) 2021 included fixed-maturity securities with a fair value of $46 million.

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- Definition Insurance Company Regulatory Requirements [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of the reported amounts of statutory capital and surplus and net income or loss. + References No definition available. + Details
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- Definition Schedule of Statutory Dividends, Loans and Advances [Table Text Block] + References No definition available. + Details
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