Capital Structure - Summary of Authorized and Issued Share Capital (Details)(Phantom) - $ / shares |
Dec. 31, 2025 |
May 01, 2025 |
Jan. 02, 2025 |
Dec. 31, 2024 |
Aug. 13, 2019 |
Sep. 20, 2016 |
May 02, 2013 |
|---|---|---|---|---|---|---|---|
| Class of Stock [Line Items] | |||||||
| Previous ordinary shares, par value | $ 0.01 | ||||||
| Ordinary shares, par value | 0.001 | $ 0.001 | $ 0.001 | ||||
| Preference shares, par value | 0.0015144558 | ||||||
| 5.950% Preference Shares (AHL PRC) | |||||||
| Class of Stock [Line Items] | |||||||
| Preference shares, par value | 0.0015144558 | 0.0015144558 | |||||
| Redemption price per share | 25 | $ 25 | 25 | $ 25 | |||
| 5.625% Preference Shares (AHL PRD) | |||||||
| Class of Stock [Line Items] | |||||||
| 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) | |||||||
| Class of Stock [Line Items] | |||||||
| Preference shares, par value | 0.0015144558 | 0.0015144558 | |||||
| Redemption price per share | $ 25,000 | $ 25,000 | $ 25 | ||||
| Depositary share interest of 1/1000th in each 5.625% | 0.001% |
| X | ||||||||||
- Definition Common Stock, Par or Stated Value Per Share, Previous Ordinary Shares No definition available.
|
| X | ||||||||||
- Definition Preferred Stock, Dividend Rate, Depositary Share Fractional Interest (1/1000th of Preference Share) No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Face amount or stated value per share of common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|