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Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract] |
Held-to-Maturity Investment Securities | The amortized cost, gross unrealized holding gains and losses, and fair value of held-to-maturity and available-for-sale investment securities were as follows:
| September 30, 2025 | December 31, 2024
(Dollars in Millions) | Amortized Cost | Unrealized Gains | Unrealized Losses | Fair Value | Amortized Cost | Unrealized Gains | Unrealized Losses | Fair Value
Held-to-Maturity |  |  |  |  |  |  |  |
U.S. Treasury and agencies | $ | 647 |  | $ | — |  | $ | (6) |  | $ | 641 |  | $ | 1,296 |  | $ | — |  | $ | (21) |  | $ | 1,275 |
Mortgage-backed securities |  |  |  |  |  |  |  |
Residential agency | 74,326 |  | 61 |  | (9,663) |  | 64,724 |  | 75,392 |  | 3 |  | (12,317) |  | 63,078 |
Commercial agency | 1,696 |  | 22 |  | (2) |  | 1,716 |  | 1,702 |  | — |  | (27) |  | 1,675 |
Other | 262 |  | 3 |  | — |  | 265 |  | 244 |  | 3 |  | — |  | 247 |
Total held-to-maturity | $ | 76,931 |  | $ | 86 |  | $ | (9,671) |  | $ | 67,346 |  | $ | 78,634 |  | $ | 6 |  | $ | (12,365) |  | $ | 66,275 |
Available-for-Sale |  |  |  |  |  |  |  |
U.S. Treasury and agencies | $ | 28,556 |  | $ | 10 |  | $ | (1,498) |  | $ | 27,068 |  | $ | 30,467 |  | $ | 1 |  | $ | (2,081) |  | $ | 28,387 |
Mortgage-backed securities |  |  |  |  |  |  |  |
Residential agency | 38,921 |  | 245 |  | (1,489) |  | 37,677 |  | 35,558 |  | 13 |  | (2,290) |  | 33,281 |
Commercial |  |  |  |  |  |  |  |
Agency | 8,655 |  | — |  | (961) |  | 7,694 |  | 8,673 |  | — |  | (1,322) |  | 7,351 |
Non-agency | 7 |  | — |  | — |  | 7 |  | 7 |  | — |  | (1) |  | 6 |
Asset-backed securities | 6,842 |  | 23 |  | — |  | 6,865 |  | 7,136 |  | 30 |  | (1) |  | 7,165 |
Obligations of state and political subdivisions | 10,571 |  | 14 |  | (1,099) |  | 9,486 |  | 10,690 |  | 13 |  | (1,151) |  | 9,552 |
Other | 265 |  | 3 |  | — |  | 268 |  | 249 |  | 1 |  | — |  | 250 |
Total available-for-sale, excluding portfolio level basis adjustments | 93,817 |  | 295 |  | (5,047) |  | 89,065 |  | 92,780 |  | 58 |  | (6,846) |  | 85,992 |
Portfolio level basis adjustments(a) | 304 |  | — |  | (304) |  | — |  | 13 |  | — |  | (13) |  | — |
Total available-for-sale | $ | 94,121 |  | $ | 295 |  | $ | (5,351) |  | $ | 89,065 |  | $ | 92,793 |  | $ | 58 |  | $ | (6,859) |  | $ | 85,992 |
(a)Represents fair value hedge basis adjustments related to active portfolio layer method hedges of available-for-sale investment securities, which are not allocated to individual securities in the portfolio. For additional information, refer to Note 12.
Available-for-Sale Investment Securities | The amortized cost, gross unrealized holding gains and losses, and fair value of held-to-maturity and available-for-sale investment securities were as follows:
| September 30, 2025 | December 31, 2024
(Dollars in Millions) | Amortized Cost | Unrealized Gains | Unrealized Losses | Fair Value | Amortized Cost | Unrealized Gains | Unrealized Losses | Fair Value
Held-to-Maturity |  |  |  |  |  |  |  |
U.S. Treasury and agencies | $ | 647 |  | $ | — |  | $ | (6) |  | $ | 641 |  | $ | 1,296 |  | $ | — |  | $ | (21) |  | $ | 1,275 |
Mortgage-backed securities |  |  |  |  |  |  |  |
Residential agency | 74,326 |  | 61 |  | (9,663) |  | 64,724 |  | 75,392 |  | 3 |  | (12,317) |  | 63,078 |
Commercial agency | 1,696 |  | 22 |  | (2) |  | 1,716 |  | 1,702 |  | — |  | (27) |  | 1,675 |
Other | 262 |  | 3 |  | — |  | 265 |  | 244 |  | 3 |  | — |  | 247 |
Total held-to-maturity | $ | 76,931 |  | $ | 86 |  | $ | (9,671) |  | $ | 67,346 |  | $ | 78,634 |  | $ | 6 |  | $ | (12,365) |  | $ | 66,275 |
Available-for-Sale |  |  |  |  |  |  |  |
U.S. Treasury and agencies | $ | 28,556 |  | $ | 10 |  | $ | (1,498) |  | $ | 27,068 |  | $ | 30,467 |  | $ | 1 |  | $ | (2,081) |  | $ | 28,387 |
Mortgage-backed securities |  |  |  |  |  |  |  |
Residential agency | 38,921 |  | 245 |  | (1,489) |  | 37,677 |  | 35,558 |  | 13 |  | (2,290) |  | 33,281 |
Commercial |  |  |  |  |  |  |  |
Agency | 8,655 |  | — |  | (961) |  | 7,694 |  | 8,673 |  | — |  | (1,322) |  | 7,351 |
Non-agency | 7 |  | — |  | — |  | 7 |  | 7 |  | — |  | (1) |  | 6 |
Asset-backed securities | 6,842 |  | 23 |  | — |  | 6,865 |  | 7,136 |  | 30 |  | (1) |  | 7,165 |
Obligations of state and political subdivisions | 10,571 |  | 14 |  | (1,099) |  | 9,486 |  | 10,690 |  | 13 |  | (1,151) |  | 9,552 |
Other | 265 |  | 3 |  | — |  | 268 |  | 249 |  | 1 |  | — |  | 250 |
Total available-for-sale, excluding portfolio level basis adjustments | 93,817 |  | 295 |  | (5,047) |  | 89,065 |  | 92,780 |  | 58 |  | (6,846) |  | 85,992 |
Portfolio level basis adjustments(a) | 304 |  | — |  | (304) |  | — |  | 13 |  | — |  | (13) |  | — |
Total available-for-sale | $ | 94,121 |  | $ | 295 |  | $ | (5,351) |  | $ | 89,065 |  | $ | 92,793 |  | $ | 58 |  | $ | (6,859) |  | $ | 85,992 |
(a)Represents fair value hedge basis adjustments related to active portfolio layer method hedges of available-for-sale investment securities, which are not allocated to individual securities in the portfolio. For additional information, refer to Note 12.
Interest Income from Taxable and Non-Taxable Investment Securities | The following table provides information about the amount of interest income from taxable and non-taxable investment securities:
| Three Months Ended September 30 | Nine Months Ended September 30
(Dollars in Millions) | 2025 | 2024 | 2025 | 2024
Taxable | $ | 1,318 |  | $ | 1,241 |  | $ | 3,833 |  | $ | 3,558 |
Non-taxable | 74 |  | 75 |  | 222 |  | 227 |
Total interest income from investment securities | $ | 1,392 |  | $ | 1,316 |  | $ | 4,055 |  | $ | 3,785 |
Gross Gains and Losses Realized through Sales of Available-for-Sale Investment Securities | The following table provides information about the amount of gross gains and losses realized through the sales of available-for-sale investment securities:
| Three Months Ended September 30 | Nine Months Ended September 30
(Dollars in Millions) | 2025 | 2024 | 2025 | 2024
Realized gains | $ | 10 |  | $ | 115 |  | $ | 18 |  | $ | 118 |
Realized losses | (17) |  | (234) |  | (82) |  | (271) |
Net realized gains (losses) | $ | (7) |  | $ | (119) |  | $ | (64) |  | $ | (153) |
Income tax (benefit) on net realized gains (losses) | $ | (2) |  | $ | (31) |  | $ | (16) |  | $ | (39) |
Gross Unrealized Losses and Fair Value of Investment Securities | The following table shows the gross unrealized losses excluding portfolio level basis adjustments and fair value of the Company’s available-for-sale investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at September 30, 2025:
| Less Than 12 Months | 12 Months or Greater | Total
(Dollars in Millions) | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses
U.S. Treasury and agencies | $ | 4,398 |  | $ | (4) |  | $ | 20,288 |  | $ | (1,494) |  | $ | 24,686 |  | $ | (1,498) |
Mortgage-backed securities |  |  |  |  |  |
Residential agency | 4,825 |  | (30) |  | 13,924 |  | (1,459) |  | 18,749 |  | (1,489) |
Commercial |  |  |  |  |  |
Agency | — |  | — |  | 7,694 |  | (961) |  | 7,694 |  | (961) |
Non-agency | — |  | — |  | 7 |  | — |  | 7 |  | — |
Asset-backed securities | 291 |  | — |  | — |  | — |  | 291 |  | — |
Obligations of state and political subdivisions | 872 |  | (15) |  | 7,815 |  | (1,084) |  | 8,687 |  | (1,099) |
Total investment securities | $ | 10,386 |  | $ | (49) |  | $ | 49,728 |  | $ | (4,998) |  | $ | 60,114 |  | $ | (5,047) |
Investment Amortized Cost, Fair Value and Yield by Maturity Date | The following table provides information about the amortized cost, fair value and yield by maturity date of the investment securities outstanding at September 30, 2025:
(Dollars in Millions) | Amortized Cost | Fair Value | Weighted- Average Maturity in Years | Weighted-Average Yield(e)
Held-to-Maturity |  |  |  |
U.S. Treasury and agencies |  |  |  |
Maturing in one year or less | $ | — |  | $ | — |  | — |  | — | %
Maturing after one year through five years | 647 |  | 641 |  | 1.6 | 3.00 |
Maturing after five years through ten years | — |  | — |  | — |  | — |
Maturing after ten years | — |  | — |  | — |  | — |
Total | $ | 647 |  | $ | 641 |  | 1.6 | 3.00 | %
Mortgage-backed securities(a) |  |  |  |
Maturing in one year or less | $ | 244 |  | $ | 246 |  | 0.6 | 4.81 | %
Maturing after one year through five years | 3,356 |  | 3,407 |  | 4.0 | 4.96 |
Maturing after five years through ten years | 72,415 |  | 62,780 |  | 8.4 | 2.17 |
Maturing after ten years | 7 |  | 7 |  | 18.6 | 1.81 |
Total | $ | 76,022 |  | $ | 66,440 |  | 8.2 | 2.31 | %
Other |  |  |  |
Maturing in one year or less | $ | 55 |  | $ | 55 |  | 0.8 | 2.73 | %
Maturing after one year through five years | 207 |  | 210 |  | 1.9 | 2.67 |
Maturing after five years through ten years | — |  | — |  | — |  | — |
Maturing after ten years | — |  | — |  | — |  | — |
Total | $ | 262 |  | $ | 265 |  | 1.7 | 2.68 | %
Total held-to-maturity(b) | $ | 76,931 |  | $ | 67,346 |  | 8.1 | 2.31 | %
Available-for-Sale |  |  |  |
U.S. Treasury and agencies |  |  |  |
Maturing in one year or less | $ | 10 |  | $ | 10 |  | 0.1 | 4.11 | %
Maturing after one year through five years | 15,513 |  | 14,986 |  | 2.8 | 2.38 |
Maturing after five years through ten years | 12,843 |  | 11,924 |  | 6.1 | 2.75 |
Maturing after ten years | 190 |  | 148 |  | 10.2 | 1.86 |
Total | $ | 28,556 |  | $ | 27,068 |  | 4.3 | 2.54 | %
Mortgage-backed securities(a) |  |  |  |
Maturing in one year or less | $ | 364 |  | $ | 358 |  | 0.8 | 1.95 | %
Maturing after one year through five years | 12,162 |  | 11,673 |  | 4.5 | 3.44 |
Maturing after five years through ten years | 34,818 |  | 33,119 |  | 6.8 | 4.13 |
Maturing after ten years | 239 |  | 228 |  | 10.8 | 5.38 |
Total | $ | 47,583 |  | $ | 45,378 |  | 6.2 | 3.94 | %
Asset-backed securities(a) |  |  |  |
Maturing in one year or less | $ | 10 |  | $ | 10 |  | — |  | 7.04 | %
Maturing after one year through five years | 2,629 |  | 2,641 |  | 2.0 | 4.85 |
Maturing after five years through ten years | 4,203 |  | 4,214 |  | 5.5 | 5.67 |
Maturing after ten years | — |  | — |  | — |  | — |
Total | $ | 6,842 |  | $ | 6,865 |  | 4.2 | 5.36 | %
Obligations of state and political subdivisions(c)(d) |  |  |  |
Maturing in one year or less | $ | 450 |  | $ | 450 |  | 0.4 | 4.32 | %
Maturing after one year through five years | 1,805 |  | 1,797 |  | 2.3 | 4.47 |
Maturing after five years through ten years | 1,174 |  | 1,105 |  | 7.6 | 3.46 |
Maturing after ten years | 7,142 |  | 6,134 |  | 14.5 | 3.49 |
Total | $ | 10,571 |  | $ | 9,486 |  | 11.1 | 3.69 | %
Other |  |  |  |
Maturing in one year or less | $ | 109 |  | $ | 109 |  | 0.6 | 4.96 | %
Maturing after one year through five years | 156 |  | 159 |  | 2.3 | 4.54 |
Maturing after five years through ten years | — |  | — |  | — |  | — |
Maturing after ten years | — |  | — |  | — |  | — |
Total | $ | 265 |  | $ | 268 |  | 1.6 | 4.71 | %
Total available-for-sale(b)(f) | $ | 93,817 |  | $ | 89,065 |  | 6.0 | 3.59 | %
(a)Information related to asset and mortgage-backed securities included above is presented based upon weighted-average maturities that take into account anticipated future prepayments. (b)The weighted-average maturity of total held-to-maturity investment securities was 8.7 years at December 31, 2024, with a corresponding weighted-average yield of 2.20 percent. The weighted-average maturity of total available-for-sale investment securities was 6.8 years at December 31, 2024, with a corresponding weighted-average yield of 3.67 percent. (c)Information related to obligations of state and political subdivisions is presented based upon yield to first optional call date if the security is purchased at a premium, and yield to maturity if the security is purchased at par or a discount. (d)Maturity calculations for obligations of state and political subdivisions are based on the first optional call date for securities with a fair value above par and the contractual maturity date for securities with a fair value equal to or below par. (e)Weighted-average yields for obligations of state and political subdivisions are presented on a fully-taxable equivalent basis based on a federal income tax rate of 21 percent. Yields on investment securities are computed based on amortized cost balances, excluding any premiums or discounts recorded related to the transfer of investment securities at fair value from available-for-sale to held-to-maturity. (f)Amortized cost excludes portfolio level basis adjustments of $304 million.

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