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SEGMENT REPORTING
 3 Months Ended
Mar. 31, 2025
Segment Reporting, Measurement Disclosures [Abstract]  
SEGMENT REPORTING SEGMENT REPORTING
The Company’s reportable segments are defined as follows: (1) Property, which is comprised of catastrophe and other property (re)insurance written on behalf of the Company’s consolidated operating subsidiaries, joint ventures and managed funds, and (2) Casualty and Specialty, which is comprised of casualty and specialty (re)insurance written on behalf of the Company’s consolidated operating subsidiaries, joint ventures and managed funds. In addition to its reportable segments, the Company has an Other category, which primarily includes its investments unit, strategic investments, corporate expenses, capital servicing costs, noncontrolling interests and certain expenses related to acquisitions and dispositions.
The Company’s reportable segments each have executive leadership who are responsible for the overall performance of their respective segments and who are directly accountable to the Company’s chief operating decision maker (“CODM”), the Chief Executive Officer of RenaissanceRe, who is ultimately responsible for reviewing the business to assess performance, make operating decisions and allocate resources. The Company reports the results of its operations consistent with the manner in which the CODM reviews the business.
The Company does not manage its assets by segment; accordingly, net investment income and total assets are not allocated to the segments.
A summary of the significant components of the Company’s revenues and expenses by segment is as follows:
Three months ended March 31, 2025PropertyCasualty and SpecialtyOtherTotal
Gross premiums written$2,130,833 $2,024,670 $— $4,155,503 
Net premiums written$1,690,994 $1,752,535 $— $3,443,529 
Net premiums earned$1,247,950 $1,472,831 $— $2,720,781 
Net claims and claim expenses incurred1,623,257 1,120,501 — 2,743,758 
Acquisition expenses167,645 479,790 — 647,435 
Operational expenses64,266 35,919 — 100,185 
Underwriting income (loss)$(607,218)$(163,379)$— (770,597)
Net investment income405,353 405,353 
Net foreign exchange gains (losses)(7,328)(7,328)
Equity in earnings (losses) of other ventures17,828 17,828 
Other income (loss)914 914 
Net realized and unrealized gains (losses) on investments332,940 332,940 
Corporate expenses(22,810)(22,810)
Interest expense(27,086)(27,086)
Income (loss) before taxes(70,786)
Income tax benefit (expense)45,525 45,525 
Net (income) loss attributable to redeemable noncontrolling interests195,252 195,252 
Dividends on preference shares(8,844)(8,844)
Net income (loss) available (attributable) to RenaissanceRe common shareholders$161,147 
Net claims and claim expenses incurred – current accident year$1,810,315 $1,129,317 $— $2,939,632 
Net claims and claim expenses incurred – prior accident years(187,058)(8,816)— (195,874)
Net claims and claim expenses incurred – total$1,623,257 $1,120,501 $— $2,743,758 
Net claims and claim expense ratio – current accident year145.1 %76.7 %108.0 %
Net claims and claim expense ratio – prior accident years(15.0)%(0.6)%(7.2)%
Net claims and claim expense ratio – calendar year130.1 %76.1 %100.8 %
Underwriting expense ratio18.6 %35.0 %27.5 %
Combined ratio148.7 %111.1 %128.3 %
Three months ended March 31, 2024PropertyCasualty and SpecialtyOtherTotal
Gross premiums written$1,889,881 $2,100,803 $— $3,990,684 
Net premiums written$1,397,618 $1,801,955 $— $3,199,573 
Net premiums earned$936,083 $1,507,827 $— $2,443,910 
Net claims and claim expenses incurred154,249 1,011,874 — 1,166,123 
Acquisition expenses185,782 445,139 — 630,921 
Operational expenses61,624 44,560 — 106,184 
Underwriting income (loss)$534,428 $6,254 $— 540,682 
Net investment income390,775 390,775 
Net foreign exchange gains (losses)(35,683)(35,683)
Equity in earnings (losses) of other ventures14,127 14,127 
Other income (loss)(50)(50)
Net realized and unrealized gains (losses) on investments(213,654)(213,654)
Corporate expenses(39,252)(39,252)
Interest expense(23,104)(23,104)
Income (loss) before taxes633,841 
Income tax benefit (expense)(15,372)(15,372)
Net (income) loss attributable to redeemable noncontrolling interests(244,827)(244,827)
Dividends on preference shares(8,844)(8,844)
Net income (loss) available (attributable) to RenaissanceRe common shareholders$364,798 
Net claims and claim expenses incurred – current accident year$248,916 $1,014,288 $— $1,263,204 
Net claims and claim expenses incurred – prior accident years(94,667)(2,414)— (97,081)
Net claims and claim expenses incurred – total$154,249 $1,011,874 $— $1,166,123 
Net claims and claim expense ratio – current accident year26.6 %67.3 %51.7 %
Net claims and claim expense ratio – prior accident years(10.1)%(0.2)%(4.0)%
Net claims and claim expense ratio – calendar year16.5 %67.1 %47.7 %
Underwriting expense ratio26.4 %32.5 %30.2 %
Combined ratio42.9 %99.6 %77.9 %