v3.26.1
SEGMENT REPORTING (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Gross premiums written $ 2,994,424 $ 3,421,180 $ 6,473,297 $ 7,576,683
Net premiums written 2,276,960 2,770,270 4,955,256 6,213,799
Net premiums earned 2,199,521 2,412,154 4,383,135 5,132,935
Net claims and claim expenses incurred 942,378 1,042,123 1,926,349 3,785,881
Acquisition expenses 563,279 642,605 1,085,129 1,290,040
Operational expenses 94,747 125,738 183,782 225,923
Underwriting income (loss) 599,117 601,688 1,187,875 (168,909)
Net investment income 432,489 413,108 852,991 818,461
Net foreign exchange gains (losses) (7,345) 8,660 (16,364) 1,332
Equity in earnings (losses) of other ventures 17,829 20,333 38,314 38,161
Other income (loss) 4,479 2,624 5,726 3,538
Net realized and unrealized gains (losses) on investments 121,628 349,720 (300,285) 682,660
Corporate expenses (18,681) (23,781) (38,141) (46,591)
Interest expense (31,778) (31,793) (63,564) (58,879)
Income (loss) before taxes 1,117,738 1,340,559 1,666,552 1,269,773
Income tax benefit (expense) (139,400) (176,869) (172,384) (131,344)
Net (income) loss attributable to redeemable noncontrolling interests (315,260) (328,339) (537,711) (133,087)
Dividends on preference shares (8,844) (8,844) (17,688) (17,688)
Net income (loss) available (attributable) to RenaissanceRe common shareholders 654,234 826,507 938,769 987,654
Net claims and claim expenses incurred – current accident year 1,141,803 1,311,833 2,287,789 4,251,465
Net claims and claim expenses incurred – prior accident years (199,425) (269,710) (361,440) (465,584)
Total net incurred $ 942,378 $ 1,042,123 $ 1,926,349 $ 3,785,881
Net claims and claim expense ratio – current accident year 51.90% 54.40% 52.20% 82.80%
Net claims and claim expense ratio – prior accident years (9.10%) (11.20%) (8.30%) (9.00%)
Net claims and claim expense ratio – calendar year 42.80% 43.20% 43.90% 73.80%
Underwriting expense ratio 30.00% 31.90% 29.00% 29.50%
Combined ratio 72.80% 75.10% 72.90% 103.30%
Other        
Segment Reporting [Line Items]        
Gross premiums written $ 0 $ 0 $ 0 $ 0
Net premiums written 0 0 0 0
Net premiums earned 0 0 0 0
Net claims and claim expenses incurred 0 0 0 0
Acquisition expenses 0 0 0 0
Operational expenses 0 0 0 0
Underwriting income (loss) 0 0 0 0
Net investment income 432,489 413,108 852,991 818,461
Net foreign exchange gains (losses) (7,345) 8,660 (16,364) 1,332
Equity in earnings (losses) of other ventures 17,829 20,333 38,314 38,161
Other income (loss) 4,479 2,624 5,726 3,538
Net realized and unrealized gains (losses) on investments 121,628 349,720 (300,285) 682,660
Corporate expenses (18,681) (23,781) (38,141) (46,591)
Interest expense (31,778) (31,793) (63,564) (58,879)
Income tax benefit (expense) (139,400) (176,869) (172,384) (131,344)
Net (income) loss attributable to redeemable noncontrolling interests (315,260) (328,339) (537,711) (133,087)
Dividends on preference shares (8,844) (8,844) (17,688) (17,688)
Net claims and claim expenses incurred – current accident year 0 0 0 0
Net claims and claim expenses incurred – prior accident years 0 0 0 0
Total net incurred 0 0 0 0
Property        
Segment Reporting [Line Items]        
Net claims and claim expenses incurred – prior accident years     (418,213) (453,634)
Property | Operating Segments        
Segment Reporting [Line Items]        
Gross premiums written 1,551,685 1,731,935 3,259,105 3,862,768
Net premiums written 1,203,424 1,325,557 2,458,617 3,016,551
Net premiums earned 881,611 868,010 1,782,349 2,115,960
Net claims and claim expenses incurred (7,079) (7,930) 77,029 1,615,327
Acquisition expenses 175,436 174,200 332,467 341,845
Operational expenses 70,579 71,569 136,315 135,835
Underwriting income (loss) 642,675 630,171 1,236,538 22,953
Net claims and claim expenses incurred – current accident year 250,393 258,646 495,242 2,068,961
Net claims and claim expenses incurred – prior accident years (257,472) (266,576) (418,213) (453,634)
Total net incurred $ (7,079) $ (7,930) $ 77,029 $ 1,615,327
Net claims and claim expense ratio – current accident year 28.40% 29.80% 27.80% 97.80%
Net claims and claim expense ratio – prior accident years (29.20%) (30.70%) (23.50%) (21.50%)
Net claims and claim expense ratio – calendar year (0.80%) (0.90%) 4.30% 76.30%
Underwriting expense ratio 27.90% 28.30% 26.30% 22.60%
Combined ratio 27.10% 27.40% 30.60% 98.90%
Casualty and Specialty        
Segment Reporting [Line Items]        
Net claims and claim expenses incurred – prior accident years     $ 56,773 $ (11,950)
Casualty and Specialty | Operating Segments        
Segment Reporting [Line Items]        
Gross premiums written $ 1,442,739 $ 1,689,245 3,214,192 3,713,915
Net premiums written 1,073,536 1,444,713 2,496,639 3,197,248
Net premiums earned 1,317,910 1,544,144 2,600,786 3,016,975
Net claims and claim expenses incurred 949,457 1,050,053 1,849,320 2,170,554
Acquisition expenses 387,843 468,405 752,662 948,195
Operational expenses 24,168 54,169 47,467 90,088
Underwriting income (loss) (43,558) (28,483) (48,663) (191,862)
Net claims and claim expenses incurred – current accident year 891,410 1,053,187 1,792,547 2,182,504
Net claims and claim expenses incurred – prior accident years 58,047 (3,134) 56,773 (11,950)
Total net incurred $ 949,457 $ 1,050,053 $ 1,849,320 $ 2,170,554
Net claims and claim expense ratio – current accident year 67.60% 68.20% 68.90% 72.30%
Net claims and claim expense ratio – prior accident years 4.40% (0.20%) 2.20% (0.40%)
Net claims and claim expense ratio – calendar year 72.00% 68.00% 71.10% 71.90%
Underwriting expense ratio 31.30% 33.80% 30.80% 34.50%
Combined ratio 103.30% 101.80% 101.90% 106.40%