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Reserve for Losses and Loss Adjustment Expenses (Tables)
12 Months Ended
Dec. 31, 2025
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]  
Analysis of losses and loss adjustment expenses and reconciliation of beginning and ending reserve balances
The following table represents an analysis of losses and loss adjustment expenses and a reconciliation of the beginning and ending reserve for losses and loss adjustment expenses:
Year Ended December 31,
202520242023
Reserve for losses and loss adjustment expenses at beginning of year$29,369 $22,752 $20,032 
Unpaid losses and loss adjustment expenses recoverable7,821 6,690 6,280 
Net reserve for losses and loss adjustment expenses at beginning of year21,548 16,062 13,752 
Net incurred losses and loss adjustment expenses relating to losses occurring in:
Current year9,970 8,849 6,784 
Prior years(600)(507)(538)
Total net incurred losses and loss adjustment expenses9,370 8,342 6,246 
Net losses and loss adjustment expense reserves of acquired business (1)50 2,477 — 
Foreign exchange (gains) losses and other550 (260)157 
Net paid losses and loss adjustment expenses relating to losses occurring in:
Current year(1,862)(1,176)(1,081)
Prior years(5,163)(3,897)(3,012)
Total net paid losses and loss adjustment expenses(7,025)(5,073)(4,093)
Net reserve for losses and loss adjustment expenses at end of year24,493 21,548 16,062 
Unpaid losses and loss adjustment expenses recoverable9,054 7,821 6,690 
Reserve for losses and loss adjustment expenses at end of year$33,547 $29,369 $22,752 
(1) Activity in the 2025 and 2024 periods primarily related to the MCE Acquisition (see note 2).
Schedule of Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense The table below summarizes (favorable) and adverse net PYD by segment and tail length:
(Favorable) AdverseYear Ended December 31,
2025Short-tailedLong-tailedTotal
Insurance$(61)$18 $(43)
Reinsurance(386)64 (322)
Mortgage(235)— (235)
Total$(682)$82 $(600)
2024
Insurance$(53)$16 $(37)
Reinsurance(232)44 (188)
Mortgage(282)— (282)
Total$(567)$60 $(507)
2023
Insurance$(85)$43 $(42)
Reinsurance(202)50 (152)
Mortgage(344)— (344)
Total$(631)$93 $(538)