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Schedule VI
12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Abstract]  
SUPPLEMENTARY INFORMATION CONCERNING PROPERTY AND CASUALTY OPERATIONS
SUPPLEMENTARY INFORMATION CONCERNING PROPERTY AND CASUALTY OPERATIONS
As of and for the years ended December 31, 2020, 2019, and 2018 (in millions of U.S. dollars)
Deferred Policy Acquisition CostsNet Reserves for Unpaid Losses and Loss ExpensesUnearned PremiumsNet Premiums EarnedNet Investment IncomeNet Losses and Loss Expenses Incurred Related toAmortization of Deferred Policy Acquisition Costs Net Paid Losses and Loss ExpensesNet Premiums Written
Current YearPrior Year
2020$4,244 $53,164 $17,652 $31,800 $3,074 $22,124 $(414)$6,076 $17,434 $32,471 
2019$4,161 $48,509 $16,771 $30,189 $3,141 $19,575 $(845)$5,831 $18,473 $31,126 
2018$3,926 $48,271 $15,532 $29,042 $3,047 $19,048 $(981)$5,630 $18,340 $29,505