| Document and Entity Information | May 22, 2023 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | RENAISSANCERE HOLDINGS LTD |
| Amendment Flag | true |
| Entity Central Index Key | 0000913144 |
| Document Type | 8-K/A |
| Document Period End Date | May 22, 2023 |
| Entity Incorporation State Country Code | D0 |
| Entity File Number | 001-14428 |
| Entity Tax Identification Number | 98-0141974 |
| Entity Address, Address Line One | Renaissance House |
| Entity Address, Address Line Two | 12 Crow Lane |
| Entity Address, City or Town | Pembroke |
| Entity Address, Country | BM |
| Entity Address, Postal Zip Code | HM 19 |
| City Area Code | (441) |
| Local Phone Number | 295-4513 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Description | As reported in a Current Report on Form 8-K (the “Original Form 8-K”) filed with the Securities and Exchange Commission by RenaissanceRe Holdings Ltd. (“RenaissanceRe”) on May 22, 2023, RenaissanceRe and American International Group Inc. (“AIG”) entered into a Stock Purchase Agreement (the “Stock Purchase Agreement”), pursuant to which, upon the terms and subject to the conditions thereof, RenaissanceRe agreed to, or to cause one of its subsidiaries to, purchase acquire and accept from certain subsidiaries of AIG, all of AIG’s right, title and interest in the shares of certain direct and indirect subsidiaries of AIG, including Validus Holdings, Ltd. and Validus Specialty, LLC. This Current Report on Form 8-K/A (this “Amendment”) amends and supplements the Original Form 8-K in order to file the Stock Purchase Agreement as Exhibit 2.1 hereto. No other modifications to the Original Form 8-K are being made by this Amendment. This Amendment should be read in connection with the Original Form 8-K, which provides a more complete description of the Stock Purchase Agreement. |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Shares, Par Value $1.00 per share |
| Trading Symbol | RNR |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing A 11000th Interest In A Series F 5.750 Preference Share Par Value 1.00 Per Share 2 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Depositary Shares, each representing a 1/1,000th interest in a Series F 5.750% Preference Share, Par Value $1.00 per share |
| Trading Symbol | RNR PRF |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing A 11000th Interest In A Series G 4.20 Preference Share Par Value 1.00 Per Share 1 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Depositary Shares, each representing a 1/1,000th interest in a Series G 4.20% Preference Share, Par Value $1.00 per share |
| Trading Symbol | RNR PRG |
| Security Exchange Name | NYSE |
