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Claim and Claim Adjustment Expense Reserves (Tables)
 12 Months Ended
Dec. 31, 2025
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration insurance contracts, reconciliation of claims development to liability
The table below reconciles the net liability for unpaid claim and claim adjustment expenses to the amount presented on the Consolidated Balance Sheets.
As of December 31
(In millions)2025
Net liability for unpaid claim and claim adjustment expenses:
Specialty$6,188 
Commercial10,696 
International2,841 
Life & Group (1)
535 
Corporate & Other357 
Total net claim and claim adjustment expenses20,617 
Reinsurance receivables: (2)
Specialty1,596 
Commercial1,553 
International535 
Life & Group56 
Corporate & Other (3)
2,242 
Total reinsurance receivables5,982 
Total gross liability for unpaid claim and claim adjustment expenses$26,599 
(1) The Life & Group segment amounts are related to unfunded structured settlements arising from short-duration contracts.
(2) Reinsurance receivables presented are gross of the allowance for uncollectible reinsurance and do not include reinsurance receivables related to paid losses.
(3) The Corporate & Other Reinsurance receivables are primarily related to A&EP claims covered under the A&EP Loss Portfolio Transfer (LPT).
Schedule of liability for unpaid claims and claims adjustment expense
The following table presents a reconciliation between beginning and ending claim and claim adjustment expense reserves.
As of or for the years ended December 31
(In millions)202520242023
Reserves, beginning of year:
Gross$24,976 $23,304 $22,120 
Ceded5,713 5,141 5,191 
Net reserves, beginning of year19,263 18,163 16,929 
Net incurred claim and claim adjustment expenses:
Provision for insured events of current year6,724 6,330 5,667 
Increase (decrease) in provision for insured events of prior years189 42 48 
Amortization of discount39 39 44 
Total net incurred (1)
6,952 6,411 5,759 
Net payments attributable to:
Current year events(1,089)(1,093)(922)
Prior year events(4,685)(4,096)(3,679)
Total net payments(5,774)(5,189)(4,601)
Foreign currency translation adjustment and other176 (122)76 
Net reserves, end of year20,617 19,263 18,163 
Ceded reserves, end of year5,982 5,713 5,141 
Gross reserves, end of year$26,599 $24,976 $23,304 
(1) Total net incurred does not agree to Insurance claims and policyholders' benefits as reflected on the Consolidated Statements of Operations due to amounts related to retroactive reinsurance deferred gain accounting, uncollectible reinsurance and benefit expenses related to future policy benefits and policyholders' dividends, which are not reflected in the table above.
Gross and net carried claim and claim adjustment expense reserves
The following tables present the gross and net carried reserves.
December 31, 2025 Specialty CommercialInternationalLife & GroupCorporate & OtherTotal
(In millions)
Gross Case Reserves$2,166 $4,093 $1,052 $556 $1,196 $9,063 
Gross IBNR Reserves5,618 8,156 2,324 35 1,403 17,536 
Total Gross Carried Claim and Claim Adjustment Expense Reserves$7,784 $12,249 $3,376 $591 $2,599 $26,599 
Net Case Reserves$1,801 $3,508 $880 $506 $119 $6,814 
Net IBNR Reserves4,387 7,188 1,961 29 238 13,803 
Total Net Carried Claim and Claim Adjustment Expense Reserves$6,188 $10,696 $2,841 $535 $357 $20,617 
December 31, 2024 Specialty CommercialInternationalLife & GroupCorporate & OtherTotal
(In millions)
Gross Case Reserves$2,023 $3,690 $876 $572 $1,241 $8,402 
Gross IBNR Reserves5,403 7,646 2,044 50 1,431 16,574 
Total Gross Carried Claim and Claim Adjustment Expense Reserves$7,426 $11,336 $2,920 $622 $2,672 $24,976 
Net Case Reserves$1,697 $3,135 $741 $514 $120 $6,207 
Net IBNR Reserves4,282 6,804 1,675 27 268 13,056 
Total Net Carried Claim and Claim Adjustment Expense Reserves$5,979 $9,939 $2,416 $541 $388 $19,263 
Net prior year development The following table presents development recorded for the Specialty, Commercial, International and Corporate & Other segments.
Years ended December 31
(In millions)202520242023
Pretax (favorable) unfavorable development:
Specialty$37 $(9)$(14)
Commercial39 (16)(22)
International(25)(6)13 
Corporate & Other134 7971 
Total pretax (favorable) unfavorable development$185 $48 $48 
Impact of loss portfolio transfer on the consolidated statement of operations
The following table presents the impact of the Loss Portfolio Transfer on the Consolidated Statements of Operations.
Years ended December 31
(In millions)202520242023
Additional amounts ceded under LPT$185 $103 $86 
Retroactive reinsurance benefit recognized(140)(95)(94)
Pretax impact of deferred retroactive reinsurance$45 $8 $(8)
Specialty  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration insurance contracts, reconciliation of claims development to liability
The table below provides the line of business composition of the net liability for unpaid claim and claim adjustment expenses for the Specialty segment.
As of December 31
(In millions)2025
Net liability for unpaid claim and claim adjustment expenses:
Medical Professional Liability$1,468 
Other Professional Liability and Management Liability4,073 
Surety521 
Warranty58 
Other68 
Total net liability for unpaid claim and claim adjustment expenses$6,188 
Net prior year claim and allocated claim adjustment expense reserve development
The following table presents further detail of the development recorded for the Specialty segment.
Years ended December 31
(In millions)202520242023
Pretax (favorable) unfavorable development:
Medical Professional Liability$— $(8)$5 
Other Professional Liability and Management Liability69 49 37 
Surety(50)(68)(43)
Warranty10 20 (11)
Other8 (2)(2)
Total pretax (favorable) unfavorable development$37 $(9)$(14)
Commercial  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration insurance contracts, reconciliation of claims development to liability
The table below provides the line of business composition of the net liability for unpaid claim and claim adjustment expenses for the Commercial segment.
As of December 31
(In millions)2025
Net Claim and claim adjustment expenses:
Commercial Auto$1,573 
General Liability4,837 
Workers' Compensation3,482 
Property and Other804 
Total net liability for claim and claim adjustment expenses$10,696 
Net prior year claim and allocated claim adjustment expense reserve development
The following table presents further detail of the development recorded for the Commercial segment.
Years ended December 31
(In millions)202520242023
Pretax (favorable) unfavorable development:
Commercial Auto$74 $107 $33 
General Liability114 75 149 
Workers' Compensation(135)(202)(203)
Property and Other(14)4 (1)
Total pretax (favorable) unfavorable development$39 $(16)$(22)
International  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Net prior year claim and allocated claim adjustment expense reserve development
The following table presents further detail of the development recorded for the International segment.
Years ended December 31
(In millions)202520242023
Pretax (favorable) unfavorable development:
Commercial$(26)$(12)$(18)
Specialty5 6 35 
Other(4)— (4)
Total pretax (favorable) unfavorable development $(25)$(6)$13 
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2025
(In millions, except reported claims data)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025IBNRCumulative Number of Claims
Accident Year
2016$519 $556 $530 $516 $508 $518 $520 $543 $540 $550 $41 26,135 
2017551 626 636 630 632 620 644 665 668 29 27,478 
2018646 693 701 706 719 747 746 745 34 34,444 
2019572 588 580 595 594 600 605 59 31,242 
2020602 584 570 552 549 537 103 23,395 
2021595 574 538 520 516 139 20,159 
2022628 635 633 608 211 16,985 
2023691 679 658 318 15,977 
2024743 780 436 14,380 
2025759 544 9,708 
Total$6,426 $1,914 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025
Accident Year
2016$129 $278 $332 $365 $390 $424 $437 $452 $468 $475 
2017118 298 372 424 455 494 560 576 594 
2018144 337 415 477 520 585 634 655 
2019117 269 344 386 420 455 476 
202087 208 269 301 339 372 
202169 170 223 262 300 
202269 197 279 308 
202363 180 254 
202476 209 
202576 
Total$3,719 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$2,707 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201683 
Liability for unallocated claim adjustment expenses for accident years presented51 
Total net liability for unpaid claim and claim adjustment expenses$2,841 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025
Total (2)
Accident Year
2016$37 $(26)$(14)$(8)$10 $2 $23 $(3)$10 $31 
201775 10 (6)2 (12)24 21 3 117 
201847 8 5 13 28 (1)(1)99 
201916 (8)15 (1)6 5 33 
2020(18)(14)(18)(3)(12)(65)
2021(21)(36)(18)(4)(79)
20227 (2)(25)(20)
2023(12)(21)(33)
202437 37 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) The amounts included in the loss reserve development tables above are presented at the year-end 2025 foreign currency exchange rates for all periods presented to remove the effects of foreign currency exchange rate fluctuations between calendar years.
CNAF Consolidated  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Schedule of historical claims duration
The table below presents information about average historical claims duration as of December 31, 2025 and is presented as required supplementary information, which is unaudited.
Average Annual Percentage Payout of Ultimate Net Incurred Claim and Allocated Claim Adjustment Expenses in Year:
12345678910
Specialty
Medical Professional Liability3.6 %16.6 %21.4 %16.7 %13.2 %9.7 %6.1 %2.9 %1.8 %0.4 %
Other Professional Liability and Management Liability6.4 %19.5 %19.8 %15.0 %11.5 %7.3 %5.8 %4.7 %3.5 %0.7 %
Surety (1)
15.2 %36.2 %12.9 %8.4 %6.3 %9.2 %(0.9)%2.6 %— %— %
Commercial
Commercial Auto22.6 %22.5 %19.1 %15.2 %10.7 %5.5 %2.6 %0.9 %0.7 %— %
General Liability3.4 %12.1 %15.5 %16.6 %14.5 %9.8 %8.4 %5.4 %5.4 %4.0 %
Workers' Compensation17.6 %24.2 %14.5 %8.8 %5.8 %3.8 %2.3 %1.2 %0.8 %— %
International15.0 %22.6 %11.3 %6.8 %5.8 %6.5 %5.6 %2.6 %2.8 %1.3 %
(1) Due to the nature of the Surety business, average annual percentage payout of ultimate net incurred claim and allocated claim adjustment expenses has been calculated using only the payouts of mature accident years presented in the loss reserve development tables.
Medical Professional Liability | Specialty  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2025
(In millions, except reported claims data)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025IBNRCumulative Number of Claims
Accident Year
2016$427 $487 $485 $499 $508 $510 $508 $514 $513 $509 $12 16,205 
2017412 449 458 460 455 460 456 463 458 11 15,400 
2018404 429 431 448 470 495 499 507 34 15,358 
2019430 445 458 471 469 481 478 17 14,572 
2020477 476 455 447 419 400 57 11,381 
2021377 376 374 349 318 57 10,085 
2022329 329 333 323 87 10,353 
2023340 350 382 129 11,129 
2024343 376 199 11,002 
2025390 317 9,107 
Total$4,141 $920 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025
Accident Year
2016$18 $121 $246 $339 $401 $436 $460 $483 $489 $491 
201719 107 235 308 355 388 417 427 438 
201821 115 211 290 349 418 453 463 
201917 91 183 280 349 395 425 
202011 61 139 201 258 303 
202111 49 118 170 223 
202210 57 122 171 
202314 86 160 
202413 82 
202515 
Total$2,771 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,370 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201647 
Liability for unallocated claim adjustment expenses for accident years presented51 
Total net liability for unpaid claim and claim adjustment expenses$1,468 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025Total
Accident Year
2016$60 $(2)$14 $9 $2 $(2)$6 $(1)$(4)$82 
201737 9 2 (5)5 (4)7 (5)46 
201825 2 17 22 25 4 8 103 
201915 13 13 (2)12 (3)48 
2020(1)(21)(8)(28)(19)(77)
2021(1)(2)(25)(31)(59)
2022— 4 (10)(6)
202310 32 42 
202433 33 
Total net development for the accident years presented above15 (17)1 
Total net development for accident years prior to 2016(10)9 1 
Total unallocated claim adjustment expense development— — (2)
Total$5 $(8)$— 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Other Professional Liability and Management Liability | Specialty  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2025
(In millions, except reported claims data)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025IBNRCumulative Number of Claims
Accident Year
2016$901 $900 $900 $904 $907 $891 $888 $906 $912 $910 $28 17,993 
2017847 845 813 791 775 758 746 752 744 25 18,223 
2018850 864 869 906 923 941 987 1,003 44 20,083 
2019837 845 856 876 939 970 984 79 19,577 
2020930 944 951 945 945 936 106 19,558 
20211,037 1,038 1,009 965 956 190 18,444 
20221,120 1,112 1,084 1,049 265 18,534 
20231,149 1,166 1,239 365 19,902 
20241,150 1,200 609 20,579 
20251,208 978 19,311 
Total$10,229 $2,689 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025
Accident Year
2016$64 $248 $466 $625 $701 $736 $784 $826 $856 $862 
201757 222 394 498 557 596 630 672 699 
201854 282 473 599 706 779 847 886 
201964 263 422 567 699 801 864 
202067 248 400 523 660 751 
202158 217 356 502 634 
202264 225 453 638 
202364 302 594 
202477 315 
202581 
Total$6,324 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$3,905 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2016101 
Liability for unallocated claim adjustment expenses for accident years presented67 
Total net liability for unpaid claim and claim adjustment expenses$4,073 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025Total
Accident Year
2016$(1)$— $4 $3 $(16)$(3)$18 $6 $(2)$9 
2017(2)(32)(22)(16)(17)(12)6 (8)(103)
201814 5 37 17 18 46 16 153 
20198 11 20 63 31 14 147 
202014 7 (6)— (9)6 
20211 (29)(44)(9)(81)
2022(8)(28)(35)(71)
202317 73 90 
202450 50 
Total net development for the accident years presented above44 34 90 
Total net development for accident years prior to 2016(7)10 (18)
Total unallocated claim adjustment expense development— 5 (3)
Total$37 $49 $69 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Surety | Specialty  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2025
(In millions, except reported claims data)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025IBNRCumulative Number of Claims
Accident Year
2016$124 $124 $109 $84 $67 $64 $58 $43 $43 $43 $3 5,590 
2017120 115 103 84 71 66 67 67 66 3 5,928 
2018114 108 91 62 56 51 49 58 2 6,322 
2019119 112 98 87 82 82 81 6 6,286 
2020128 119 81 67 57 67 6 4,918 
2021137 129 110 91 74 12 5,003 
2022155 158 132 118 53 5,131 
2023175 169 147 92 4,889 
2024171 167 124 4,397 
2025163 155 3,143 
Total$984 $456 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025
Accident Year
2016$5 $37 $45 $45 $43 $43 $41 $40 $40 $40 
201723 37 41 46 49 62 62 63 63 
20185 25 34 39 40 41 41 46 
201912 34 44 59 70 74 75 
20204 20 28 33 44 57 
20215 20 35 42 59 
202212 35 52 59 
20238 27 52 
202420 37 
20254 
Total$492 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$492 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201613 
Liability for unallocated claim adjustment expenses for accident years presented16 
Total net liability for unpaid claim and claim adjustment expenses$521 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025Total
Accident Year
2016$— $(15)$(25)$(17)$(3)$(6)$(15)$— $— $(81)
2017(5)(12)(19)(13)(5)1 — (1)(54)
2018(6)(17)(29)(6)(5)(2)9 (56)
2019(7)(14)(11)(5)— (1)(38)
2020(9)(38)(14)(10)10 (61)
2021(8)(19)(19)(17)(63)
20223 (26)(14)(37)
2023(6)(22)(28)
2024(4)(4)
Total net development for the accident years presented above(54)(63)(40)
Total net development for accident years prior to 201611 (5)(7)
Total unallocated claim adjustment expense development— — (3)
Total$(43)$(68)$(50)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Commercial Auto | Commercial  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2025
(In millions, except reported claims data)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025IBNRCumulative Number of Claims
Accident Year
2016$198 $186 $186 $186 $190 $195 $200 $197 $195 $194 $— 30,459 
2017199 198 200 221 232 239 241 241 237 — 30,948 
2018229 227 227 245 254 255 260 259 1 34,333 
2019257 266 289 323 325 327 323 — 37,281 
2020310 303 304 298 303 299 7 29,192 
2021397 388 390 393 377 16 33,063 
2022437 465 496 506 55 37,327 
2023554 620 635 120 42,921 
2024726 799 270 49,670 
2025886 616 41,075 
Total$4,515 $1,085 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025
Accident Year
2016$52 $93 $126 $154 $175 $185 $190 $192 $193 $193 
201758 107 150 178 203 225 232 235 237 
201866 128 175 212 238 249 256 257 
201977 147 203 257 295 312 319 
202071 134 197 246 276 287 
202183 168 240 305 347 
2022112 236 334 411 
2023127 270 414 
2024153 345 
2025163 
Total$2,973 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,542 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 20165 
Liability for unallocated claim adjustment expenses for accident years presented26 
Total net liability for unpaid claim and claim adjustment expenses$1,573 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025Total
Accident Year
2016$(12)$— $— $4 $5 $5 $(3)$(2)$(1)$(4)
2017(1)2 21 11 7 2 — (4)38 
2018(2)— 18 9 1 5 (1)30 
20199 23 34 2 2 (4)66 
2020(7)1 (6)5 (4)(11)
2021(9)2 3 (16)(20)
202228 31 10 69 
202366 15 81 
202473 73 
Total net development for the accident years presented above26 110 68 
Total net development for accident years prior to 20164 (3)3 
Total unallocated claim adjustment expense development3 — 3 
Total$33 $107 $74 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
General Liability | Commercial  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2025
(In millions, except reported claims data)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025IBNRCumulative Number of Claims
Accident Year
2016$623 $659 $667 $671 $673 $683 $684 $704 $712 $723 $23 24,982 
2017632 632 632 634 630 652 690 713 749 15 22,611 
2018653 644 646 639 650 679 665 663 63 20,631 
2019680 682 682 691 720 727 747 98 20,091 
2020723 722 726 736 702 662 139 15,152 
2021782 784 793 814 833 189 16,349 
2022929 928 930 952 316 18,494 
20231,071 1,106 1,146 516 18,905 
20241,271 1,295 833 20,250 
20251,381 1,218 15,771 
Total$9,151 $3,410 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025
Accident Year
2016$32 $163 $279 $407 $481 $524 $582 $620 $652 $681 
201723 118 250 399 471 553 606 657 705 
201833 107 228 307 428 491 546 573 
201925 98 181 322 455 532 607 
202023 99 192 280 367 450 
202126 140 262 391 542 
202229 123 260 439 
202333 153 356 
202434 180 
202543 
Total$4,576 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$4,575 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2016179 
Liability for unallocated claim adjustment expenses for accident years presented83 
Total net liability for unpaid claim and claim adjustment expenses$4,837 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025Total
Accident Year
2016$36 $8 $4 $2 $10 $1 $20 $8 $11 $100 
2017— — 2 (4)22 38 23 36 117 
2018(9)2 (7)11 29 (14)(2)10 
20192 — 9 29 7 20 67 
2020(1)4 10 (34)(40)(61)
20212 9 21 19 51 
2022(1)2 22 23 
202335 40 75 
202424 24 
Total net development for the accident years presented above134 48 130 
Total net development for accident years prior to 201615 27 (30)
Total unallocated claim adjustment expense development— — 14 
Total$149 $75 $114 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Workers' Compensation | Commercial  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2025
(In millions, except reported claims data)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025IBNRCumulative Number of Claims
Accident Year
2016$426 $405 $396 $382 $366 $355 $331 $308 $293 $287 $40 32,007 
2017440 432 421 400 402 399 398 383 364 44 33,164 
2018450 440 428 415 415 404 399 393 57 34,930 
2019452 449 437 436 419 416 410 57 34,398 
2020477 466 446 414 393 363 74 29,506 
2021468 454 432 421 412 97 30,150 
2022497 489 478 467 108 33,488 
2023555 551 541 161 37,037 
2024574 586 196 38,866 
2025646 348 36,112 
Total$4,469 $1,182 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025
Accident Year
2016$53 $129 $169 $198 $219 $227 $234 $235 $238 $238 
201763 151 207 243 265 279 287 293 295 
201868 163 229 259 280 298 307 313 
201971 169 223 262 291 310 320 
202065 147 200 228 246 257 
202167 164 222 256 273 
202279 192 258 299 
202387 209 286 
2024111 264 
2025127 
Total$2,672 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,797 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 20161,648 
Other (2)
(23)
Liability for unallocated claim adjustment expenses for accident years presented60 
Total net liability for unpaid claim and claim adjustment expenses$3,482 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022(1)
2023(1)
2024(1)
2025Total
Accident Year
2016$(21)$(9)$(14)$(16)$(11)$(24)$(23)$(15)$(6)$(139)
2017(8)(11)(21)2 (3)(1)(15)(19)(76)
2018(10)(12)(13)— (11)(5)(6)(57)
2019(3)(12)(1)(17)(3)(6)(42)
2020(11)(20)(32)(21)(30)(114)
2021(14)(22)(11)(9)(56)
2022(8)(11)(11)(30)
2023(4)(10)(14)
202412 12 
Total net development for the accident years presented above(114)(85)(85)
Adjustment for development on a discounted basis(2)(2)2 
Total net development for accident years prior to 2016(93)(115)(52)
Total unallocated claim adjustment expense development6 — — 
Total$(203)$(202)$(135)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) Other includes the effect of discounting lifetime claim reserves.