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Fair Value (Tables)
9 Months Ended
Sep. 30, 2025
Fair Value Disclosures [Abstract]  
Assets and liabilities measured at fair value on a recurring basis
Assets and liabilities measured at fair value on a recurring basis are presented in the following tables. Corporate bonds and other includes obligations of the United States of America (U.S.) Treasury, government-sponsored enterprises, foreign governments and redeemable preferred stock.
September 30, 2025   Total
Assets/Liabilities
at Fair Value
(In millions)Level 1Level 2Level 3
Assets    
Fixed maturity securities:    
Corporate bonds and other$227 $24,795 $1,400 $26,422 
States, municipalities and political subdivisions— 8,332 44 8,376 
Asset-backed— 7,945 959 8,904 
Total fixed maturity securities 227 41,072 2,403 43,702 
Equity securities:
Common stock187 — 10 197 
Non-redeemable preferred stock36 493 — 529 
Total equity securities223 493 10 726 
Short-term and other2,017 52 — 2,069 
Total assets$2,467 $41,617 $2,413 $46,497 
Total liabilities$— $— $— $— 

December 31, 2024   Total
Assets/Liabilities
at Fair Value
(In millions)Level 1Level 2Level 3
Assets    
Fixed maturity securities:    
Corporate bonds and other$223 $24,340 $1,278 $25,841 
States, municipalities and political subdivisions— 6,762 42 6,804 
Asset-backed— 7,590 876 8,466 
Total fixed maturity securities 223 38,692 2,196 41,111 
Equity securities:
Common stock162 — 18 180 
Non-redeemable preferred stock36 441 479 
Total equity securities198 441 20 659 
Short-term and other1,852 70 — 1,922 
Total assets$2,273 $39,203 $2,216 $43,692 
Total liabilities$— $— $— $— 
Table of reconciliation for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs
The tables below present a reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3).
Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of July 1, 2025
$1,388 $44 $886 $10 $2,328 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)— — — 
Reported in Net investment income— — — 
Reported in Other comprehensive income (loss)21 — — 29 
Total realized and unrealized investment gains (losses)21 — 16 — 37 
Purchases24 — 93 — 117 
Sales— — — — — 
Settlements(33)— (36)— (69)
Transfers into Level 3— — — — — 
Transfers out of Level 3— — — — — 
Balance as of September 30, 2025
$1,400 $44 $959 $10 $2,413 
Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2025 recognized in Net income (loss) in the period
$— $— $— $— $— 
Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2025 recognized in Other comprehensive income (loss) in the period
21 — — 30 

Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of July 1, 2024
$1,129 $43 $887 $14 $2,073 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)— — (3)— (3)
Reported in Net investment income— — — 
Reported in Other comprehensive income (loss)59 30 — 91 
Total realized and unrealized investment gains (losses)59 31 — 92 
Purchases83 — 38 — 121 
Sales(10)— — — (10)
Settlements(24)— (23)— (47)
Transfers into Level 3— — — — — 
Transfers out of Level 3— — (18)— (18)
Balance as of September 30, 2024
$1,237 $45 $915 $14 $2,211 
Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2024 recognized in Net income (loss) in the period
$— $— $— $— $— 
Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2024 recognized in Other comprehensive income (loss) in the period
57 30 — 89 
Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of January 1, 2025
$1,278 $42 $876 $20 $2,216 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)— (1)
Reported in Net investment income— — 14 (1)13 
Reported in Other comprehensive income (loss)58 — 65 
Total realized and unrealized investment gains (losses)59 18 80 
Purchases123 — 142 — 265 
Sales— — — (7)(7)
Settlements(75)— (77)(4)(156)
Transfers into Level 315 — — — 15 
Transfers out of Level 3— — — — — 
Balance as of September 30, 2025
$1,400 $44 $959 $10 $2,413 
Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2025 recognized in Net income (loss) in the period
$— $— $— $(1)$(1)
Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2025 recognized in Other comprehensive income (loss) in the period
55 — 63 

Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of January 1, 2024
$1,045 $44 $901 $24 $2,014 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)— — (10)— (10)
Reported in Net investment income— — 15 21 
Reported in Other comprehensive income (loss)39 14 — 54 
Total realized and unrealized investment gains (losses)39 19 65 
Purchases229 — 111 343 
Sales(10)— (14)(19)(43)
Settlements(77)— (65)— (142)
Transfers into Level 311 — — — 11 
Transfers out of Level 3— — (37)— (37)
Balance as of September 30, 2024
$1,237 $45 $915 $14 $2,211 
Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2024 recognized in Net income (loss) in the period
$— $— $— $$
Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2024 recognized in Other comprehensive income (loss) in the period
34 14 — 49 
Quantitative information about significant unobservable inputs in the fair value measurement of level 3 assets
The following tables present quantitative information about the significant unobservable inputs utilized by the Company in the fair value measurements of Level 3 assets. Valuations for assets and liabilities not presented in the tables below are primarily based on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. The quantitative detail of these unobservable inputs is neither provided nor reasonably available to the Company. The weighted average rate is calculated based on fair value.
September 30, 2025Estimated Fair Value
(In millions)
Valuation Technique(s)Unobservable Input(s)Range
 (Weighted Average)
Fixed maturity securities$1,866 Discounted cash flowCredit spread
1% - 7% (2%)
December 31, 2024Estimated Fair Value
(In millions)
Valuation Technique(s)Unobservable Input(s)Range
 (Weighted Average)
Fixed maturity securities$1,724 Discounted cash flowCredit spread
1% - 6% (2%)
Carrying amount and estimated fair value of financial instrument assets and liabilities not measured at fair value
The carrying amount and estimated fair value of the Company's financial assets and liabilities which are not measured at fair value on the Condensed Consolidated Balance Sheets are presented in the following tables.
September 30, 2025Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$1,055 $— $— $1,047 $1,047 
Liabilities
Short-term debt$500 $— $500 $— $500 
Long-term debt2,970 — 2,959 — 2,959 
December 31, 2024Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$1,019 $— $— $987 $987 
Liabilities
Short-term debt$— $— $— $— $— 
Long-term debt2,973 — 2,885 — 2,885