Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Earnings per Share | ||
| Net earnings attributable to shareholders of Fairfax | $ 4,772.4 | $ 3,874.9 |
| Preferred share dividends | (24.5) | (48.6) |
| Excess of carrying value over redemption cost of preferred shares redeemed | 187.1 | 53.5 |
| Net earnings attributable to common shareholders - basic and diluted | $ 4,935.0 | $ 3,879.8 |
| Weighted average common shares outstanding - basic (in shares) | 21,449,822 | 22,373,092 |
| Share-based payment awards (in shares) | 1,634,205 | 1,790,368 |
| Weighted average common shares outstanding - diluted (in shares) | 23,084,027 | 24,163,460 |
| Net earnings per common share - basic (in dollars per share) | $ 230.07 | $ 173.41 |
| Net earnings per common share - diluted (in dollars per share) | $ 213.78 | $ 160.56 |
| X | ||||||||||
- Definition Adjustment to profit (loss) for excess of book value over consideration of preferred shares redeemed to calculate profit (loss) attributable to ordinary equity holders of the parent entity. No definition available.
|
| X | ||||||||||
- Definition The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Adjustment to profit (loss) for non-participating preference share dividends to calculate profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Preference shares [member]; Profit (loss)] Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The potential dilutive effect on the weighted average number of ordinary shares that relate to the assumed exercise of the entity's share options. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The profit (loss) attributable to ordinary equity holders of the parent entity, adjusted for the effects of all dilutive potential ordinary shares. [Refer: Profit (loss)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|