Capital Structure - Summary of Authorized and Issued Share Capital (Details) - USD ($) |
12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jan. 01, 2025 |
Nov. 29, 2024 |
Nov. 26, 2024 |
Aug. 13, 2019 |
Sep. 20, 2016 |
May 02, 2013 |
Dec. 31, 2025 |
Dec. 31, 2024 |
May 01, 2025 |
Jan. 02, 2025 |
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| Authorized share capital: | ||||||||||||
| Number of ordinary shares | 750,000,000 | 750,000,000 | ||||||||||
| Number of preference shares | 150,000,000 | 150,000,000 | ||||||||||
| Ordinary Shares, authorized | $ 750,000 | $ 750,000 | ||||||||||
| Preference Shares, authorized | 227,000 | 227,000 | ||||||||||
| Total authorized share capital | $ 977,000 | $ 977,000 | ||||||||||
| Issued share capital: | ||||||||||||
| Ordinary shares, issued | 91,838,366 | 90,833,333 | ||||||||||
| Ordinary shares, value | [1] | $ 92,000 | $ 91,000 | |||||||||
| Total issued share capital | $ 107,000 | $ 123,000 | ||||||||||
| Ordinary shares, par value | $ 0.001 | $ 0.001 | $ 0.001 | |||||||||
| Preference shares, par value | $ 0.0015144558 | |||||||||||
| 5.950% Preference Shares (AHL PRC) | ||||||||||||
| Issued share capital: | ||||||||||||
| Preference shares, issued | 11,000,000,000,000 | 0 | 11,000,000 | |||||||||
| Preference shares, value | $ 0 | $ 17,000 | ||||||||||
| Preferred Stock, Dividend Rate, Percentage | 5.95% | 5.95% | 5.95% | 5.95% | 5.95% | |||||||
| Preference shares, par value | $ 0.0015144558 | $ 0.0015144558 | ||||||||||
| Redemption price per share | $ 25 | $ 25 | $ 25 | $ 25 | ||||||||
| 5.625% Preference Shares (AHL PRD) | ||||||||||||
| Issued share capital: | ||||||||||||
| Preference shares, issued | 10,000,000 | 10,000,000 | 10,000,000 | |||||||||
| Preference shares, value | $ 15,000 | $ 15,000 | ||||||||||
| Preferred Stock, Dividend Rate, Percentage | 5.625% | 5.625% | ||||||||||
| Preference shares, par value | $ 0.0015144558 | $ 0.0015144558 | ||||||||||
| Redemption price per share | $ 25 | $ 25 | $ 25 | |||||||||
| 5.625% Preference Shares, rep by Dep Shares (AHL PRE) | ||||||||||||
| Issued share capital: | ||||||||||||
| Preference shares, issued | 10,000,000 | 10,000,000 | 10,000,000 | |||||||||
| Preference shares, value | $ 0 | $ 0 | ||||||||||
| Preferred Stock, Dividend Rate, Percentage | 5.625% | 5.625% | ||||||||||
| Preference shares, par value | $ 0.0015144558 | $ 0.0015144558 | ||||||||||
| Redemption price per share | $ 25 | $ 25,000 | $ 25,000 | |||||||||
| 7.00% Preference Shares, rep by Dep Shares (AHL PRF) | ||||||||||||
| Issued share capital: | ||||||||||||
| Preference shares, issued | 9,000,000 | 9,000,000 | 9,000,000 | |||||||||
| Preference shares, value | $ 0 | $ 0 | ||||||||||
| Preferred Stock, Dividend Rate, Percentage | 7.00% | 7.00% | 7.00% | |||||||||
| Preference shares, par value | $ 0.0015144558 | $ 0.0015144558 | ||||||||||
| Redemption price per share | $ 25 | $ 25,000 | $ 25,000 | |||||||||
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