Schedule II. Condensed Financial Information Of Registrant - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets
Fixed maturity investments trading, at fair value - amortized cost $0 at December 31, 2023 (2022 - $176,084)	$ 20,877,108	$ 14,351,402
Short term investments, at fair value - amortized cost $277,917 at December 31, 2023 (2022 - $61,747)	4,604,079	4,669,272
Total investments	29,216,143	22,220,436
Cash and cash equivalents	1,877,518	1,194,339
Accrued investment income	205,713	121,501
Receivable for investments sold	622,197	350,526
Other assets	323,960	261,549
Deferred tax asset	685,040	123,153
Goodwill and other intangible assets	775,352	237,828
Total assets	49,007,105	36,552,878
Liabilities
Other liabilities	1,021,872	648,036
Total liabilities	33,451,316	26,692,215
Equity, Attributable to Parent [Abstract]
Preference shares: $1.00 par value – 30,000 shares issued and outstanding at December 31, 2023 (2022 – 30,000)	750,000	750,000
Common shares: $1.00 par value – 52,693,887 shares issued and outstanding at December 31, 2023 (2022 – 43,717,836)	52,694	43,718
Additional paid-in capital	2,144,459	475,647
Accumulated other comprehensive income (loss)	(14,211)	(15,462)
Retained earnings	6,522,016	4,071,371
Total shareholders’ equity attributable to RenaissanceRe	9,454,958	5,325,274	$ 6,624,281
Total liabilities, noncontrolling interests and shareholders’ equity	49,007,105	36,552,878
Parent Company
Assets
Fixed maturity investments trading, at fair value - amortized cost $0 at December 31, 2023 (2022 - $176,084)	0	175,842
Short term investments, at fair value - amortized cost $277,917 at December 31, 2023 (2022 - $61,747)	277,917	61,747
Total investments	277,917	237,589
Cash and cash equivalents	45,080	7,048
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	9,632,226	4,477,418
Due from subsidiaries	52,816	6,575
Dividends due from subsidiaries	0	0
Accrued investment income	0	874
Receivable for investments sold	2,849	80,327
Other assets	660,818	898,553
Deferred tax asset	33,646	0
Goodwill and other intangible assets	101,509	104,718
Total assets	10,806,861	5,813,102
Liabilities
Notes and bank loans payable	1,136,260	394,221
Due to subsidiaries	136,729	9,413
Payable for investments purchased	0	74,428
Other liabilities	78,915	9,766
Total liabilities	1,351,904	487,828
Equity, Attributable to Parent [Abstract]
Preference shares: $1.00 par value – 30,000 shares issued and outstanding at December 31, 2023 (2022 – 30,000)	750,000	750,000
Common shares: $1.00 par value – 52,693,887 shares issued and outstanding at December 31, 2023 (2022 – 43,717,836)	52,694	43,718
Additional paid-in capital	2,144,459	475,647
Accumulated other comprehensive income (loss)	(14,211)	(15,462)
Retained earnings	6,522,015	4,071,371
Total shareholders’ equity attributable to RenaissanceRe	9,454,957	5,325,274
Total liabilities, noncontrolling interests and shareholders’ equity	$ 10,806,861	$ 5,813,102