| Document and Entity Information | Nov. 01, 2023 |
| Document And Entity Information [Line Items] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Document Period End Date | Nov. 01, 2023 |
| Entity Registrant Name | RENAISSANCERE HOLDINGS LTD |
| Entity Incorporation State Country Code | D0 |
| Entity File Number | 001-14428 |
| Entity Tax Identification Number | 98-0141974 |
| Entity Address Address Line 1 | Renaissance House |
| Entity Address Address Line 2 | 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 | On November 1, 2023, RenaissanceRe Holdings Ltd. (the “Company”) filed a Current Report on Form 8-K with the Securities and Exchange Commission (the “Original 8-K”), which reported that on November 1, 2023, the Company completed its previously announced acquisition (the “Validus Acquisition”) in accordance with the Stock Purchase Agreement, dated May 22, 2023, as amended, between the Company and American International Group, Inc., a Delaware corporation and NYSE-listed company (together with its affiliates and subsidiaries, “AIG”), pursuant to which, upon the terms and subject to the conditions thereof, the Company, or one of its subsidiaries, purchased, acquired and accepted from certain subsidiaries of AIG, all of their right, title and interest in the shares of Validus Holdings, Ltd. (“Validus Holdings”) and Validus Specialty, LLC (“Validus Specialty”). Substantially all of the assets of Validus Holdings is comprised of its equity interest in its wholly-owned subsidiary, Validus Reinsurance, Ltd. (“Validus Re”). The Company also acquired the renewal rights, records and customer relationships of the assumed treaty reinsurance business of Talbot Underwriting Limited, an affiliate of AIG, a specialty (re)insurance group operating within the Lloyd’s market. This amendment to the Original 8-K (“Amendment No. 1”) is being filed for the purpose of satisfying the Company’s undertaking to file the financial statements required by Item 9.01 of Form 8-K. This Amendment No. 1 should be read in conjunction with the Original 8-K. Except as set forth herein, no modifications have been made to information contained in the Original 8-K, and the Company has not updated any information therein to reflect events that have occurred since the date of the Original 8-K. |
| Entity Central Index Key | 0000913144 |
| 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 1/1,000th interest in a Series F 5.750% Preference Share, Par Value $1.00 per share [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 1/1,000th interest in a Series G 4.20% Preference Share, Par Value $1.00 per share [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 |
