Schedule II. Condensed Financial Information Of Registrant - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Fixed maturity investments trading, at fair value - amortized cost $176,084 at December 31, 2022 (2021 - $—)	$ 14,351,402	$ 13,507,131
Short term investments, at fair value - amortized cost $61,747 at December 31, 2022 (2021 - $46,503)	4,669,272	5,298,385
Total investments	22,220,436	21,442,659
Cash and cash equivalents	1,194,339	1,859,019
Accrued investment income	121,501	55,740
Receivable for investments sold	350,526	380,442
Other assets	384,702	224,053
Goodwill and other intangible assets	237,828	243,496
Total assets	36,552,878	33,959,502
Liabilities
Other liabilities	648,036	755,441
Total liabilities	26,692,215	23,781,168
Shareholders’ Equity
Preference shares: $1.00 par value – 30,000 shares issued and outstanding at December 31, 2022 (2021 – 30,000)	750,000	750,000
Common shares: $1.00 par value – 43,717,836 shares issued and outstanding at December 31, 2022 (2021 – 44,444,831)	43,718	44,445
Additional paid-in capital	475,647	608,121
Accumulated other comprehensive income (loss)	(15,462)	(10,909)
Retained earnings	4,071,371	5,232,624
Total shareholders’ equity attributable to RenaissanceRe	5,325,274	6,624,281	$ 7,560,248
Total liabilities, noncontrolling interests and shareholders’ equity	36,552,878	33,959,502
Parent Company
Assets
Fixed maturity investments trading, at fair value - amortized cost $176,084 at December 31, 2022 (2021 - $—)	175,842	0
Short term investments, at fair value - amortized cost $61,747 at December 31, 2022 (2021 - $46,503)	61,747	46,503
Total investments	237,589	46,503
Cash and cash equivalents	7,048	35,834
Investments in subsidiaries	4,477,418	6,137,229
Due from subsidiaries	6,575	9,468
Dividends due from subsidiaries	0	0
Accrued investment income	874	6
Receivable for investments sold	80,327	3
Other assets	898,553	859,176
Goodwill and other intangible assets	104,718	108,261
Total assets	5,813,102	7,196,480
Liabilities
Notes and bank loans payable	394,221	393,306
Due to subsidiaries	9,413	156,353
Payable for investments purchased	74,428	0
Other liabilities	9,766	22,540
Total liabilities	487,828	572,199
Shareholders’ Equity
Preference shares: $1.00 par value – 30,000 shares issued and outstanding at December 31, 2022 (2021 – 30,000)	750,000	750,000
Common shares: $1.00 par value – 43,717,836 shares issued and outstanding at December 31, 2022 (2021 – 44,444,831)	43,718	44,445
Additional paid-in capital	475,647	608,121
Accumulated other comprehensive income (loss)	(15,462)	(10,909)
Retained earnings	4,071,371	5,232,624
Total shareholders’ equity attributable to RenaissanceRe	5,325,274	6,624,281
Total liabilities, noncontrolling interests and shareholders’ equity	$ 5,813,102	$ 7,196,480