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Reserve for Claims and Claim Expenses (Tables)
6 Months Ended
Jun. 30, 2022
Insurance Loss Reserves [Abstract]  
Schedule of Liability for Unpaid Claims and Claim Expenses
The following table summarizes the Company’s claims and claim expense reserves by segment, allocated between case reserves, additional case reserves and IBNR:
At June 30, 2022Case
Reserves
Additional
Case Reserves
IBNRTotal
Property$1,867,749 $1,863,120 $2,168,573 $5,899,442 
Casualty and Specialty1,875,398 147,793 5,520,173 7,543,364 
Total
$3,743,147 $2,010,913 $7,688,746 $13,442,806 
At December 31, 2021
Property$1,555,210 $1,996,760 $2,825,718 $6,377,688 
Casualty and Specialty1,784,334 128,065 5,004,543 6,916,942 
Total
$3,339,544 $2,124,825 $7,830,261 $13,294,630 

Activity in the liability for unpaid claims and claim expenses is summarized as follows:
Six months ended June 3020222021
Reserve for claims and claim expenses, net of reinsurance recoverable, as of beginning of period$9,025,961 $7,455,128 
Net incurred related to:
Current year1,608,762 1,448,133 
Prior years(60,790)(61,061)
Total net incurred1,547,972 1,387,072 
Net paid related to:
Current year41,124 65,278 
Prior years1,129,979 995,826 
Total net paid1,171,103 1,061,104 
Foreign exchange (1)
(166,483)(23,992)
Reserve for claims and claim expenses, net of reinsurance recoverable, as of end of period9,236,347 7,757,104 
Reinsurance recoverable as of end of period4,206,459 3,187,638 
Reserve for claims and claim expenses as of end of period$13,442,806 $10,944,742 
(1)    Reflects the impact of the foreign exchange revaluation of the net reserve for claims and claim expenses denominated in non-U.S. dollars as at the balance sheet date.
The following table details the Company’s prior year net development by segment of its liability for net unpaid claims and claim expenses:
Six months ended June 3020222021
(Favorable) adverse development(Favorable) adverse development
Property$(51,810)$(56,145)
Casualty and Specialty(8,980)(4,916)
Total net (favorable) adverse development of prior accident years net claims and claim expenses$(60,790)$(61,061)
The following tables detail the development of the Company’s liability for net unpaid claims and claim expenses for its Property segment, allocated between large and small catastrophe net claims and claim expenses and attritional net claims and claim expenses, included in the other line item:
Six months ended June 302022
(Favorable) adverse development
Catastrophe net claims and claim expenses
Large catastrophe events
2021 Weather-Related Large Loss Events$4,385 
2020 Weather-Related Large Loss Events(10,887)
2019 Large Loss Events(25,821)
2018 Large Loss Events(10,300)
2017 Large Loss Events(22,143)
Other(2,578)
Total large catastrophe events(67,344)
Small catastrophe events and attritional loss movements
Other small catastrophe events and attritional loss movements15,534 
Total small catastrophe events and attritional loss movements15,534 
Total catastrophe and attritional net claims and claim expenses(51,810)
Total net (favorable) adverse development of prior accident years net claims and claim expenses$(51,810)
Six months ended June 302021
(Favorable) adverse development
Catastrophe net claims and claim expenses
Large catastrophe events
2020 Weather-Related Large Loss Events$16,932 
2019 Large Loss Events(1,424)
2018 Large Loss Events(37,910)
2017 Large Loss Events(5,708)
Other(2,993)
Total large catastrophe events(31,103)
Small catastrophe events and attritional loss movements
Other small catastrophe events and attritional loss movements
(25,042)
Total small catastrophe events and attritional loss movements(25,042)
Total catastrophe and attritional net claims and claim expenses
(56,145)
Total net (favorable) adverse development of prior accident years net claims and claim expenses$(56,145)
The following table details the development of the Company’s liability for unpaid claims and claim expenses for its Casualty and Specialty segment:
Six months ended June 3020222021
(Favorable) adverse development(Favorable) adverse development
Actuarial methods - actual reported claims less than expected claims$(27,315)$(4,916)
Actuarial assumption changes
18,335 — 
Total net (favorable) adverse development of prior accident years net claims and claim expenses$(8,980)$(4,916)