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SEGMENT REPORTING (Tables)
9 Months Ended
Sep. 30, 2023
Segment Reporting [Abstract]  
Schedule of Underwriting Results for Operating Segments
The following tables present the underwriting results for the operating segments for the periods indicated:
Three Months Ended September 30, 2023Nine Months Ended September 30, 2023
(Dollars in millions)ReinsuranceInsuranceTotalReinsuranceInsuranceTotal
Gross written premiums$3,219 $1,172 $4,391 $8,622 $3,692 $12,314 
Net written premiums3,008 858 3,866 8,101 2,768 10,870 
Premiums earned$2,612 $901 $3,513 $7,236 $2,629 $9,865 
Incurred losses and LAE1,665 581 2,246 4,477 1,696 6,173 
Commission and brokerage648 104 752 1,791 307 2,099 
Other underwriting expenses65 150 215 190 430 620 
Underwriting gain (loss)$234 $66 $301 $778 $196 $974 
Net investment income406 1,023 
Net gains (losses) on investments(31)(21)
Corporate expenses(19)(55)
Interest, fee and bond issue cost amortization expense(34)(99)
Other income (expense)103 61 
Income (loss) before taxes$725 $1,883 
(Some amounts may not reconcile due to rounding.)
Three Months Ended September 30, 2022Nine Months Ended September 30, 2022
(Dollars in millions)ReinsuranceInsuranceTotalReinsuranceInsuranceTotal
Gross written premiums$2,551 $1,129 $3,680 $6,938 $3,376 $10,313 
Net written premiums2,460 862 3,323 6,664 2,492 9,156 
Premiums earned$2,245 $822 $3,067 $6,451 $2,324 $8,775 
Incurred losses and LAE1,992 631 2,623 4,699 1,591 6,289 
Commission and brokerage537 104 641 1,582 295 1,877 
Other underwriting expenses54 115 169 156 344 500 
Underwriting gain (loss)$(338)$(29)$(367)$14 $95 $109 
Net investment income151 620 
Net gains (losses) on investments(129)(519)
Corporate expenses(16)(45)
Interest, fee and bond issue cost amortization expense(25)(74)
Other income (expense)(16)(71)
Income (loss) before taxes$(401)$20 
(Some amounts may not reconcile due to rounding.)