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v3.25.3

Investment securities | 9 Months Ended
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Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract] |
Investment securities | 3. Investment securities The amortized cost and estimated fair value of investment securities were as follows:
(Dollars in millions) | Amortized Cost (a) |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
September 30, 2025 |  |  |  |  |  |  |
Investment securities available for sale: |  |  |  |  |  |  |
U.S. Treasury | $ | 6,581 |  |  | $ | 42 |  |  | $ | 3 |  |  | $ | 6,620 |
Mortgage-backed securities: |  |  |  |  |  |  |
Government issued or guaranteed: |  |  |  |  |  |  |
Commercial | 4,789 |  |  | 74 |  |  | 2 |  |  | 4,861 |
Residential | 11,628 |  |  | 120 |  |  | 68 |  |  | 11,680 |
Other | 2 |  |  | — |  |  | — |  |  | 2 |
| 23,000 |  |  | 236 |  |  | 73 |  |  | 23,163 |
Investment securities held to maturity: |  |  |  |  |  |  |
U.S. Treasury | 444 |  |  | — |  |  | 6 |  |  | 438 |
Mortgage-backed securities: |  |  |  |  |  |  |
Government issued or guaranteed: |  |  |  |  |  |  |
Commercial | 2,020 |  |  | — |  |  | 77 |  |  | 1,943 |
Residential | 8,048 |  |  | 7 |  |  | 662 |  |  | 7,393 |
Privately issued | 33 |  |  | 12 |  |  | — |  |  | 45 |
State and political subdivisions | 2,165 |  |  | — |  |  | 61 |  |  | 2,104 |
Other | 1 |  |  | — |  |  | — |  |  | 1 |
| 12,711 |  |  | 19 |  |  | 806 |  |  | 11,924 |
Total debt securities | $ | 35,711 |  |  | $ | 255 |  |  | $ | 879 |  |  | $ | 35,087 |
Equity and other securities: |  |  |  |  |  |  |
Readily marketable equity — at fair value | $ | 257 |  |  | $ | 3 |  |  | $ | 2 |  |  | $ | 258 |
Other — at cost | 732 |  |  | — |  |  | — |  |  | 732 |
Total equity and other securities | $ | 989 |  |  | $ | 3 |  |  | $ | 2 |  |  | $ | 990 |
December 31, 2024 |  |  |  |  |  |  |
Investment securities available for sale: |  |  |  |  |  |  |
U.S. Treasury | $ | 7,945 |  |  | $ | 13 |  |  | $ | 27 |  |  | $ | 7,931 |
Mortgage-backed securities: |  |  |  |  |  |  |
Government issued or guaranteed: |  |  |  |  |  |  |
Commercial | 3,739 |  |  | 8 |  |  | 45 |  |  | 3,702 |
Residential | 7,368 |  |  | 13 |  |  | 167 |  |  | 7,214 |
Other | 2 |  |  | — |  |  | — |  |  | 2 |
| 19,054 |  |  | 34 |  |  | 239 |  |  | 18,849 |
Investment securities held to maturity: |  |  |  |  |  |  |
U.S. Treasury | 1,015 |  |  | — |  |  | 14 |  |  | 1,001 |
Mortgage-backed securities: |  |  |  |  |  |  |
Government issued or guaranteed: |  |  |  |  |  |  |
Commercial | 2,034 |  |  | — |  |  | 157 |  |  | 1,877 |
Residential | 8,773 |  |  | — |  |  | 961 |  |  | 7,812 |
Privately issued | 37 |  |  | 9 |  |  | — |  |  | 46 |
State and political subdivisions | 2,335 |  |  | — |  |  | 117 |  |  | 2,218 |
Other | 1 |  |  | — |  |  | — |  |  | 1 |
| 14,195 |  |  | 9 |  |  | 1,249 |  |  | 12,955 |
Total debt securities | $ | 33,249 |  |  | $ | 43 |  |  | $ | 1,488 |  |  | $ | 31,804 |
Equity and other securities: |  |  |  |  |  |  |
Readily marketable equity — at fair value | $ | 235 |  |  | $ | 3 |  |  | $ | 3 |  |  | $ | 235 |
Other — at cost | 772 |  |  | — |  |  | — |  |  | 772 |
Total equity and other securities | $ | 1,007 |  |  | $ | 3 |  |  | $ | 3 |  |  | $ | 1,007 |
__________________________________________________________________________________ (a)Amortized cost balances of debt securities exclude accrued interest receivable of $176 million at each of September 30, 2025 and December 31, 2024, which is included in Accrued interest and other assets in the Company's Consolidated Balance Sheet. A summary of debt investment securities that as of September 30, 2025 and December 31, 2024 had been in a continuous unrealized loss position for less than twelve months and those that had been in a continuous unrealized loss position for twelve months or longer follows:
| Less Than 12 Months |  | 12 Months or More
(Dollars in millions) | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
September 30, 2025 |  |  |  |  |  |  |
Investment securities available for sale: |  |  |  |  |  |  |
U.S. Treasury | $ | — |  |  | $ | — |  |  | $ | 247 |  |  | $ | 3 |
Mortgage-backed securities: |  |  |  |  |  |  |
Government issued or guaranteed: |  |  |  |  |  |  |
Commercial | 135 |  |  | — |  |  | 323 |  |  | 2 |
Residential | 458 |  |  | 2 |  |  | 1,442 |  |  | 66 |
Other | 1 |  |  | — |  |  | — |  |  | — |
| 594 |  |  | 2 |  |  | 2,012 |  |  | 71 |
Investment securities held to maturity: |  |  |  |  |  |  |
U.S. Treasury | — |  |  | — |  |  | 438 |  |  | 6 |
Mortgage-backed securities: |  |  |  |  |  |  |
Government issued or guaranteed: |  |  |  |  |  |  |
Commercial | — |  |  | — |  |  | 1,943 |  |  | 77 |
Residential | 83 |  |  | 1 |  |  | 6,513 |  |  | 661 |
Privately issued | 2 |  |  | — |  |  | — |  |  | — |
State and political subdivisions | 9 |  |  | — |  |  | 1,916 |  |  | 61 |
| 94 |  |  | 1 |  |  | 10,810 |  |  | 805 |
Total | $ | 688 |  |  | $ | 3 |  |  | $ | 12,822 |  |  | $ | 876 |
December 31, 2024 |  |  |  |  |  |  |
Investment securities available for sale: |  |  |  |  |  |  |
U.S. Treasury | $ | 1,971 |  |  | $ | 9 |  |  | $ | 2,554 |  |  | $ | 18 |
Mortgage-backed securities: |  |  |  |  |  |  |
Government issued or guaranteed: |  |  |  |  |  |  |
Commercial | 2,566 |  |  | 45 |  |  | 64 |  |  | — |
Residential | 4,429 |  |  | 53 |  |  | 1,623 |  |  | 114 |
Other | — |  |  | — |  |  | 2 |  |  | — |
| 8,966 |  |  | 107 |  |  | 4,243 |  |  | 132 |
Investment securities held to maturity: |  |  |  |  |  |  |
U.S. Treasury | 50 |  |  | — |  |  | 951 |  |  | 14 |
Mortgage-backed securities: |  |  |  |  |  |  |
Government issued or guaranteed: |  |  |  |  |  |  |
Commercial | — |  |  | — |  |  | 1,877 |  |  | 157 |
Residential | 996 |  |  | 19 |  |  | 6,811 |  |  | 942 |
State and political subdivisions | 39 |  |  | 1 |  |  | 2,131 |  |  | 116 |
| 1,085 |  |  | 20 |  |  | 11,770 |  |  | 1,229 |
Total | $ | 10,051 |  |  | $ | 127 |  |  | $ | 16,013 |  |  | $ | 1,361 |
The Company owned 3,158 individual debt securities with aggregate gross unrealized losses of $879 million at September 30, 2025. Based on a review of each of the securities in the investment securities portfolio at September 30, 2025, the Company concluded that it expected to recover the amortized cost basis of its investment. As of September 30, 2025, the Company does not intend to sell nor is it anticipated that it would be required to sell any of its impaired investment securities at a loss. At September 30, 2025, the Company has not identified events or changes in circumstances which may have a significant adverse effect on the fair value of the $732 million of cost method equity securities. The Company estimated no material allowance for credit losses for its investment securities classified as held to maturity at September 30, 2025 and December 31, 2024. At September 30, 2025, the amortized cost and estimated fair value of debt securities by contractual maturity were as follows:
(Dollars in millions) | Amortized Cost |  | Estimated Fair Value
Debt securities available for sale: |  |  |
Due in one year or less | $ | 2,634 |  |  | $ | 2,639 |
Due after one year through five years | 3,949 |  |  | 3,983 |
Due after five years through ten years | — |  |  | — |
Due after ten years | — |  |  | — |
| 6,583 |  |  | 6,622 |
Mortgage-backed securities | 16,417 |  |  | 16,541 |
| $ | 23,000 |  |  | $ | 23,163 |
Debt securities held to maturity: |  |  |
Due in one year or less | $ | 71 |  |  | $ | 71 |
Due after one year through five years | 679 |  |  | 672 |
Due after five years through ten years | 1,355 |  |  | 1,336 |
Due after ten years | 505 |  |  | 464 |
| 2,610 |  |  | 2,543 |
Mortgage-backed securities | 10,101 |  |  | 9,381 |
| $ | 12,711 |  |  | $ | 11,924 |
At September 30, 2025 and December 31, 2024, investment securities with carrying values of $6.0 billion (including $65 million related to repurchase transactions) and $6.2 billion (including $71 million related to repurchase transactions), respectively, were pledged to secure outstanding borrowings, lines of credit and governmental deposits.

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