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Commitments and contingencies (Tables) | 9 Months Ended
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Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingent Liabilities Outstanding | The following table presents the Company's significant credit-related commitments. Certain of these commitments are not included in the Company's Consolidated Balance Sheet.
(Dollars in millions) | September 30, 2025 |  | December 31, 2024
Commitments to extend credit: |  |  |
Commercial and industrial | $ | 35,781 |  |  | $ | 31,521 |
Commercial real estate loans to be sold | 1,074 |  |  | 479 |
Other commercial real estate | 1,956 |  |  | 2,697 |
Residential real estate loans to be sold | 329 |  |  | 190 |
Other residential real estate | 757 |  |  | 517 |
Home equity lines of credit | 7,906 |  |  | 7,933 |
Credit cards | 6,486 |  |  | 6,087 |
Other | 364 |  |  | 244 |
Standby letters of credit | 2,271 |  |  | 2,260 |
Commercial letters of credit | 75 |  |  | 58 |
Financial guarantees and indemnification contracts | 4,552 |  |  | 4,335 |
Commitments to sell real estate loans | 1,868 |  |  | 1,142 |

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