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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2025
Earnings Per Share [Abstract] |
Schedule of Computation of Basic and Diluted Earnings Per Common Share | The following table sets forth the computation of basic and diluted earnings per common share:
|  | Three months ended |  | Six months ended |
| (common shares in thousands) | June 30, 2025 |  | June 30, 2024 |  | June 30, 2025 |  | June 30, 2024 |
| Numerator: |  |  |  |  |  |  |  |
| Net income (loss) available (attributable) to RenaissanceRe common shareholders | $ | 826,507 |  |  | $ | 495,046 |  |  | $ | 987,654 |  |  | $ | 859,844 |  |
| Amount allocated to participating common shareholders (1) | (13,344) |  |  | (7,322) |  |  | (15,269) |  |  | (12,573) |  |
| Net income (loss) allocated to RenaissanceRe common shareholders | $ | 813,163 |  |  | $ | 487,724 |  |  | $ | 972,385 |  |  | $ | 847,271 |  |
| Denominator: |  |  |  |  |  |  |  |
| Denominator for basic income (loss) per RenaissanceRe common share - weighted average common shares (2) | 47,140 |  |  | 51,680 |  |  | 47,737 |  |  | 51,679 |  |
| Per common share equivalents of non-vested shares (2) | 146 |  |  | 134 |  |  | 163 |  |  | 142 |  |
| Denominator for diluted income (loss) per RenaissanceRe common share - adjusted weighted average common shares and assumed conversions (2) | 47,286 |  |  | 51,814 |  |  | 47,900 |  |  | 51,821 |  |
| Net income (loss) available (attributable) to RenaissanceRe common shareholders per common share – basic | $ | 17.25 |  |  | $ | 9.44 |  |  | $ | 20.37 |  |  | $ | 16.39 |  |
| Net income (loss) available (attributable) to RenaissanceRe common shareholders per common share – diluted | $ | 17.20 |  |  | $ | 9.41 |  |  | $ | 20.30 |  |  | $ | 16.35 |  |
(1)Represents earnings and dividends attributable to holders of unvested shares issued pursuant to the Company’s stock compensation plans. (2)In periods for which the Company has net loss allocated to RenaissanceRe common shareholders, the denominator used in calculating net loss attributable to RenaissanceRe common shareholders per common share - basic is also used in calculating net loss attributable to RenaissanceRe common shareholders per common share - diluted.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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