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v3.20.1

History, Organization and Business Combination - Narrative (Details) - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 28, 2020 | Sep. 20, 2016 | Dec. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2019
Class of Stock [Line Items] |  |  |  |  |
Business acquisition, share price |  |  |  |  | $ 42.75
Authorized share capital |  |  | $ 745,434 | $ 1,631,000 |
Number of ordinary shares |  |  | 70,000,000 | 969,629,030 |
Ordinary shares, par value |  |  | $ 0.01 | $ 0.0015144558 |
Number of preference shares |  |  | 30,000,000 | 100,000,000 |
Preference shares, par value |  |  | $ 0.0015144558 | $ 0.0015144558 |
Ordinary shares, issued |  |  | 60,395,839 |  |
5.950% Preference Shares (AHL PRC) |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Preference shares, par value |  |  | $ 0.0015144558 | $ 0.0015144558 |
Preference shares, rate |  |  | 5.95% | 5.95% |
5.625% Preference Shares (AHL PRD) |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Preference shares, par value |  |  | $ 0.0015144558 | $ 0.0015144558 |
Preference shares, rate | 5.625% | 5.625% | 5.625% | 5.625% |

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