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SEGMENT REPORTING (Tables)
12 Months Ended
Dec. 31, 2023
Segment Reporting [Abstract]  
Schedule of Underwriting Results for Segments
The following tables present the underwriting results for our segments for the periods indicated:
Year Ended December 31, 2023
(Dollars in millions)ReinsuranceInsuranceTotal
Gross written premiums$11,460 $5,177 $16,637 
Net written premiums10,802 3,929 14,730 
Premiums earned$9,799 $3,644 $13,443 
Incurred losses and LAE5,696 2,732 8,427 
Commission and brokerage2,520 432 2,952 
Other underwriting expenses255 591 846 
Underwriting gain (loss)$1,328 $(109)$1,219 
Net investment income1,434 
Net gains (losses) on investments(276)
Corporate expenses(73)
Interest, fee and bond issue cost amortization expense(134)
Other income (expense)(14)
Income (loss) before taxes$2,154 
Year Ended December 31, 2022
(Dollars in millions)ReinsuranceInsuranceTotal
Gross written premiums$9,248 $4,704 $13,952 
Net written premiums8,919 3,426 12,344 
Premiums earned$8,598 $3,189 $11,787 
Incurred losses and LAE5,966 2,134 8,100 
Commission and brokerage2,116 413 2,528 
Other underwriting expenses217 464 682 
Underwriting gain (loss)$300 $178 $477 
Net investment income830 
Net gains (losses) on investments(455)
Corporate expenses(61)
Interest, fee and bond issue cost amortization expense(101)
Other income (expense)(102)
Income (loss) before taxes$588 
Year Ended December 31, 2021
(Dollars in millions)ReinsuranceInsuranceTotal
Gross written premiums$9,018 $4,032 $13,050 
Net written premiums8,488 2,958 11,446 
Premiums earned$7,708 $2,698 $10,406 
Incurred losses and LAE5,543 1,848 7,391 
Commission and brokerage1,833 376 2,209 
Other underwriting expenses198 385 583 
Underwriting gain (loss)$135 $89 $224 
Net investment income1,165 
Net gains (losses) on investments258 
Corporate expenses(68)
Interest, fee and bond issue cost amortization expense(70)
Other income (expense)37 
Income (loss) before taxes$1,546 
Schedule of Gross Written Premium by Geographic Region
The following table below presents gross written premiums by geographic region. Allocations have been made on the basis of location of risk.

United StatesEuropeAll other
202358 %24 %18 %
202263 %22 %15 %
202164 %20 %15 %