Table of Contents The following tables present a summary of fixed maturity securities. 70 December 31, 2018 Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Unrealized OTTI Losses (Gains) (In millions) Fixed maturity securities available-for-sale: Corporate and other bonds $ 18,764 $ 791 $ 395 $ 19,160 $ — States, municipalities and political subdivisions 9,681 1,076 9 10,748 — Asset-backed: Residential mortgage-backed 4,815 68 57 4,826 (20 ) Commercial mortgage-backed 2,200 28 32 2,196 — Other asset-backed 1,975 11 24 1,962 — Total asset-backed 8,990 107 113 8,984 (20) U.S. Treasury and obligations of government-sponsored enterprises 156 3 — 159 — Foreign government 480 5 4 481 — Redeemable preferred stock 10 — — 10 — Total fixed maturity securities available-for-sale 38,081 1,982 521 39,542 $ (20) Total fixed maturity securities trading 4 — — 4 Total fixed maturity securities $ 38,085 $ 1,982 $ 521 $ 39,546 December 31, 2019 Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Unrealized OTTI Losses (Gains) (In millions) Fixed maturity securities available-for-sale: Corporate and other bonds $ 19,789 $ 2,292 $ 32 $ 22,049 $ — States, municipalities and political subdivisions 9,093 1,559 — 10,652 — Asset-backed: Residential mortgage-backed 4,387 133 1 4,519 (17 ) Commercial mortgage-backed 2,265 86 5 2,346 1 Other asset-backed 1,925 41 4 1,962 (3 ) Total asset-backed 8,577 260 10 8,827 (19) U.S. Treasury and obligations of government-sponsored enterprises 146 1 2 145 — Foreign government 491 14 1 504 — Redeemable preferred stock 10 — — 10 — Total fixed maturity securities available-for-sale 38,106 4,126 45 42,187 $ (19) Total fixed maturity securities trading 20 — — 20 Total fixed maturity securities $ 38,126 $ 4,126 $ 45 $ 42,207