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Investments (Tables) | 12 Months Ended
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Dec. 31, 2022
Investments [Abstract] |
Net investment income | The significant components of Net investment income are presented in the following table.
Years ended December 31 |  |  |  |  |
(In millions) | 2022 |  | 2021 |  | 2020
Fixed maturity securities | $ | 1,787 |  |  | $ | 1,707 |  |  | $ | 1,728 |
Equity securities | 23 |  |  | 83 |  |  | 65 |
Limited partnership investments | (12) |  |  | 362 |  |  | 121 |
Mortgage loans | 54 |  |  | 61 |  |  | 57 |
Short term investments | 16 |  |  | 1 |  |  | 9 |
Trading portfolio | 4 |  |  | 9 |  |  | 18 |
Other | 5 |  |  | — |  |  | 1 |
Gross investment income | 1,877 |  |  | 2,223 |  |  | 1,999 |
Investment expense | (72) |  |  | (64) |  |  | (64) |
Net investment income | $ | 1,805 |  |  | $ | 2,159 |  |  | $ | 1,935 |
Net investment income (loss) recognized due to the change in fair value of common stock held as of December 31, 2022, 2021 and 2020 | $ | 47 |  |  | $ | 28 |  |  | $ | 34 |
Net realized investment gains (losses) | Net investment gains (losses) are presented in the following table.
Years ended December 31 |  |  |  |  |
(In millions) | 2022 |  | 2021 |  | 2020
Net investment gains (losses): |  |  |  |  |
Fixed maturity securities: |  |  |  |  |
Gross gains | $ | 120 |  |  | $ | 186 |  |  | $ | 220 |
Gross losses | (261) |  |  | (90) |  |  | (220) |
Net investment gains (losses) on fixed maturity securities | (141) |  |  | 96 |  |  | — |
Equity securities | (116) |  |  | 4 |  |  | (3) |
Derivatives | 64 |  |  | 6 |  |  | (10) |
Mortgage loans | (8) |  |  | 10 |  |  | (21) |
Short term investments and other | 2 |  |  | 4 |  |  | (20) |
Net investment gains (losses) | $ | (199) |  |  | $ | 120 |  |  | $ | (54) |
Net investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock held as of December 31, 2022, 2021 and 2020 | $ | (75) |  |  | $ | 2 |  |  | $ | (3) |
Components of net other than temporary impairment losses recognized in earnings by asset type | The table includes losses (gains) on securities with an intention to sell and changes in the allowance for credit losses on securities since acquisition date.
Years ended December 31 |  |  |  |  |
(In millions) | 2022 |  | 2021 |  | 2020
Fixed maturity securities available-for-sale: |  |  |  |  |
Corporate and other bonds | $ | 62 |  |  | $ | 11 |  |  | $ | 87 |
Asset-backed | — |  |  | 20 |  |  | 24 |
Impairment losses (gains) recognized in earnings | $ | 62 |  |  | $ | 31 |  |  | $ | 111 |
Summary of fixed maturity securities | The following tables present a summary of fixed maturity securities.
December 31, 2022 | Cost or Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Allowance for Credit Losses |  | Estimated Fair Value
(In millions) |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |  |  |  |  |
Corporate and other bonds | $ | 23,137 |  |  | $ | 301 |  |  | $ | 2,009 |  |  | $ | — |  |  | $ | 21,429 |
States, municipalities and political subdivisions | 8,918 |  |  | 338 |  |  | 939 |  |  | — |  |  | 8,317 |
Asset-backed: |  |  |  |  |  |  |  |  |
Residential mortgage-backed | 3,073 |  |  | 5 |  |  | 447 |  |  | — |  |  | 2,631 |
Commercial mortgage-backed | 1,886 |  |  | 4 |  |  | 255 |  |  | — |  |  | 1,635 |
Other asset-backed | 3,287 |  |  | 2 |  |  | 361 |  |  | 1 |  |  | 2,927 |
Total asset-backed | 8,246 |  |  | 11 |  |  | 1,063 |  |  | 1 |  |  | 7,193 |
U.S. Treasury and obligations of government-sponsored enterprises | 111 |  |  | 1 |  |  | 2 |  |  | — |  |  | 110 |
Foreign government | 617 |  |  | 1 |  |  | 43 |  |  | — |  |  | 575 |
Redeemable preferred stock | 3 |  |  | — |  |  | — |  |  | — |  |  | 3 |
Total fixed maturity securities available-for-sale | 41,032 |  |  | 652 |  |  | 4,056 |  |  | 1 |  |  | 37,627 |
Total fixed maturity securities trading | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total fixed maturity securities | $ | 41,032 |  |  | $ | 652 |  |  | $ | 4,056 |  |  | $ | 1 |  |  | $ | 37,627 |
December 31, 2021 | Cost or Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Allowance for Credit Losses |  | Estimated Fair Value
(In millions) |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |  |  |  |  |
Corporate and other bonds | $ | 21,444 |  |  | $ | 2,755 |  |  | $ | 56 |  |  | $ | 11 |  |  | $ | 24,132 |
States, municipalities and political subdivisions | 10,358 |  |  | 1,599 |  |  | 14 |  |  | — |  |  | 11,943 |
Asset-backed: |  |  |  |  |  |  |  |  |
Residential mortgage-backed | 2,893 |  |  | 71 |  |  | 8 |  |  | — |  |  | 2,956 |
Commercial mortgage-backed | 1,987 |  |  | 63 |  |  | 19 |  |  | — |  |  | 2,031 |
Other asset-backed | 2,561 |  |  | 54 |  |  | 10 |  |  | 7 |  |  | 2,598 |
Total asset-backed | 7,441 |  |  | 188 |  |  | 37 |  |  | 7 |  |  | 7,585 |
U.S. Treasury and obligations of government-sponsored enterprises | 132 |  |  | 1 |  |  | 3 |  |  | — |  |  | 130 |
Foreign government | 570 |  |  | 15 |  |  | 2 |  |  | — |  |  | 583 |
Redeemable preferred stock | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total fixed maturity securities available-for-sale | 39,945 |  |  | 4,558 |  |  | 112 |  |  | 18 |  |  | 44,373 |
Total fixed maturity securities trading | 7 |  |  | — |  |  | — |  |  | — |  |  | 7 |
Total fixed maturity securities | $ | 39,952 |  |  | $ | 4,558 |  |  | $ | 112 |  |  | $ | 18 |  |  | $ | 44,380 |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value | The following tables present the estimated fair value and gross unrealized losses of fixed maturity securities in a gross unrealized loss position for which an allowance for credit loss has not been recorded, by the length of time in which the securities have continuously been in that position.
| Less than 12 Months |  | 12 Months or Longer |  | Total
December 31, 2022 | Estimated Fair Value |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Gross Unrealized Losses
(In millions) |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |
Corporate and other bonds | $ | 15,946 |  |  | $ | 1,585 |  |  | $ | 1,634 |  |  | $ | 424 |  |  | $ | 17,580 |  |  | $ | 2,009 |
States, municipalities and political subdivisions | 4,079 |  |  | 769 |  |  | 456 |  |  | 170 |  |  | 4,535 |  |  | 939 |
Asset-backed: |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed | 1,406 |  |  | 144 |  |  | 1,143 |  |  | 303 |  |  | 2,549 |  |  | 447 |
Commercial mortgage-backed | 1,167 |  |  | 159 |  |  | 408 |  |  | 96 |  |  | 1,575 |  |  | 255 |
Other asset-backed | 2,087 |  |  | 262 |  |  | 542 |  |  | 99 |  |  | 2,629 |  |  | 361 |
Total asset-backed | 4,660 |  |  | 565 |  |  | 2,093 |  |  | 498 |  |  | 6,753 |  |  | 1,063 |
U.S. Treasury and obligations of government-sponsored enterprises | 76 |  |  | 1 |  |  | 16 |  |  | 1 |  |  | 92 |  |  | 2 |
Foreign government | 473 |  |  | 26 |  |  | 78 |  |  | 17 |  |  | 551 |  |  | 43 |
Total | $ | 25,234 |  |  | $ | 2,946 |  |  | $ | 4,277 |  |  | $ | 1,110 |  |  | $ | 29,511 |  |  | $ | 4,056 |
| Less than 12 Months |  | 12 Months or Longer |  | Total
December 31, 2021 | Estimated Fair Value |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Gross Unrealized Losses
(In millions) |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |
Corporate and other bonds | $ | 2,389 |  |  | $ | 48 |  |  | $ | 136 |  |  | $ | 8 |  |  | $ | 2,525 |  |  | $ | 56 |
States, municipalities and political subdivisions | 730 |  |  | 14 |  |  | — |  |  | — |  |  | 730 |  |  | 14 |
Asset-backed: |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed | 1,043 |  |  | 8 |  |  | — |  |  | — |  |  | 1,043 |  |  | 8 |
Commercial mortgage-backed | 527 |  |  | 7 |  |  | 167 |  |  | 12 |  |  | 694 |  |  | 19 |
Other asset-backed | 840 |  |  | 10 |  |  | 62 |  |  | — |  |  | 902 |  |  | 10 |
Total asset-backed | 2,410 |  |  | 25 |  |  | 229 |  |  | 12 |  |  | 2,639 |  |  | 37 |
U.S. Treasury and obligations of government-sponsored enterprises | 69 |  |  | 3 |  |  | 5 |  |  | — |  |  | 74 |  |  | 3 |
Foreign government | 97 |  |  | 2 |  |  | — |  |  | — |  |  | 97 |  |  | 2 |
Total | $ | 5,695 |  |  | $ | 92 |  |  | $ | 370 |  |  | $ | 20 |  |  | $ | 6,065 |  |  | $ | 112 |
The following table presents the estimated fair value and gross unrealized losses of fixed maturity securities in a gross unrealized loss position for which an allowance for credit loss has not been recorded, by ratings distribution.
| December 31, 2022 |  | December 31, 2021
(In millions) | Estimated Fair Value |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Gross Unrealized Losses
U.S. Government, Government agencies and Government-sponsored enterprises | $ | 2,355 |  |  | $ | 337 |  |  | $ | 898 |  |  | $ | 8 |
AAA | 1,559 |  |  | 298 |  |  | 368 |  |  | 6 |
AA | 4,327 |  |  | 817 |  |  | 875 |  |  | 17 |
A | 6,615 |  |  | 749 |  |  | 1,516 |  |  | 23 |
BBB | 13,226 |  |  | 1,621 |  |  | 1,812 |  |  | 42 |
Non-investment grade | 1,429 |  |  | 234 |  |  | 596 |  |  | 16 |
Total | $ | 29,511 |  |  | $ | 4,056 |  |  | $ | 6,065 |  |  | $ | 112 |
Debt securities, available-for-sale, allowance for credit loss | Accrued interest receivable on available-for-sale fixed maturity securities totaled $394 million and $369 million as of December 31, 2022 and 2021 and is excluded from the estimate of expected credit losses and the amortized cost basis in the table included within this Note.
(In millions) | Corporate and other bonds |  | Asset-backed |  | Total
Allowance for credit losses: |  |  |  |  |
Balance as of January 1, 2022 | $ | 11 |  |  | $ | 7 |  |  | $ | 18 |
Additions to the allowance for credit losses: |  |  |  |  |
Securities for which credit losses were not previously recorded | — |  |  | — |  |  | — |
Available-for-sale securities accounted for as PCD assets | — |  |  | 3 |  |  | 3 |
Reductions to the allowance for credit losses: |  |  |  |  |
Securities sold during the period (realized) | — |  |  | — |  |  | — |
Write-offs charged against the allowance | 12 |  |  | — |  |  | 12 |
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period | 1 |  |  | (9) |  |  | (8) |
Balance as of December 31, 2022 | $ | — |  |  | $ | 1 |  |  | $ | 1 |
(In millions) | Corporate and other bonds |  | Asset-backed |  | Total
Allowance for credit losses: |  |  |  |  |
Balance as of January 1, 2021 | $ | 23 |  |  | $ | 17 |  |  | $ | 40 |
Additions to the allowance for credit losses: |  |  |  |  |
Securities for which credit losses were not previously recorded | 14 |  |  | — |  |  | 14 |
Available-for-sale securities accounted for as PCD assets | 5 |  |  | 6 |  |  | 11 |
Reductions to the allowance for credit losses: |  |  |  |  |
Securities sold during the period (realized) | 7 |  |  | 17 |  |  | 24 |
Write-offs charged against the allowance | 16 |  |  | — |  |  | 16 |
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period | (8) |  |  | 1 |  |  | (7) |
Balance as of December 31, 2021 | $ | 11 |  |  | $ | 7 |  |  | $ | 18 |
Contractual maturity | The following table presents available-for-sale fixed maturity securities by contractual maturity.
December 31 | 2022 |  | 2021
(In millions) | Cost or Amortized Cost |  | Estimated Fair Value |  | Cost or Amortized Cost |  | Estimated Fair Value
Due in one year or less | $ | 1,012 |  |  | $ | 1,001 |  |  | $ | 1,603 |  |  | $ | 1,624 |
Due after one year through five years | 9,880 |  |  | 9,399 |  |  | 10,637 |  |  | 11,229 |
Due after five years through ten years | 13,788 |  |  | 12,453 |  |  | 13,294 |  |  | 14,338 |
Due after ten years | 16,352 |  |  | 14,774 |  |  | 14,411 |  |  | 17,182 |
Total | $ | 41,032 |  |  | $ | 37,627 |  |  | $ | 39,945 |  |  | $ | 44,373 |
Financing receivable credit quality indicators | The following table presents the amortized cost basis of mortgage loans for each credit quality indicator by year of origination.
December 31, 2022 | Mortgage Loans Amortized Cost Basis by Origination Year (1)
(In millions) | 2022 |  | 2021 |  | 2020 |  | 2019 |  | 2018 |  | Prior |  | Total
DSCR ≥1.6x |  |  |  |  |  |  |  |  |  |  |  |  |
LTV less than 55% | $ | 9 |  |  | $ | 13 |  |  | $ | 112 |  |  | $ | 41 |  |  | $ | 53 |  |  | $ | 255 |  |  | $ | 483 |
LTV 55% to 65% | 13 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 13
LTV greater than 65% | 18 |  |  | 11 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 29
DSCR 1.2x - 1.6x |  |  |  |  |  |  |  |  |  |  |  |  |
LTV less than 55% | 5 |  |  | 49 |  |  | 18 |  |  | 43 |  |  | 10 |  |  | 37 |  |  | 162
LTV 55% to 65% | 86 |  |  | — |  |  | 20 |  |  | — |  |  | — |  |  | 8 |  |  | 114
LTV greater than 65% | 15 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 15
DSCR ≤1.2 |  |  |  |  |  |  |  |  |  |  |  |  |
LTV less than 55% | 35 |  |  | — |  |  | — |  |  | 57 |  |  | — |  |  | — |  |  | 92
LTV 55% to 65% | 41 |  |  | 21 |  |  | — |  |  | 38 |  |  | — |  |  | — |  |  | 100
LTV greater than 65% | 27 |  |  | — |  |  | — |  |  | 22 |  |  | — |  |  | 7 |  |  | 56
Total | $ | 249 |  |  | $ | 94 |  |  | $ | 150 |  |  | $ | 201 |  |  | $ | 63 |  |  | $ | 307 |  |  | $ | 1,064 |
(1) The values in the table above reflect DSCR on a standardized amortization period and LTV based on the most recent appraised values trended forward using changes in a commercial real estate price index.

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