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Variable interest entities and asset securitizations (Tables) | 6 Months Ended
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Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Variable Interest Entities | Information on the Company's carrying amount of its investments in tax equity partnerships and its related future funding commitments are presented in the following table.
(Dollars in millions) | June 30, 2026 |  | December 31, 2025
Affordable housing projects: |  |  |
Carrying amount (a) | $ | 1,816 |  |  | $ | 1,867 |
Amount of future funding commitments included in carrying amount (b) | 806 |  |  | 889 |
Contingent commitments | 108 |  |  | 109 |
Renewable energy: |  |  |
Carrying amount (a) | 96 |  |  | 67 |
Amount of future funding commitments included in carrying amount (b) | 35 |  |  | 66 |
Other: |  |  |
Carrying amount (a) | 45 |  |  | 33 |
Amount of future funding commitments included in carrying amount | — |  |  | — |
__________________________________________________________________________________ (a)Included in Accrued interest and other assets in the Company's Consolidated Balance Sheet. (b)Included in Accrued interest and other liabilities in the Company's Consolidated Balance Sheet.
Schedule of Asset-Backed Notes Issued to Investors | The following table summarizes the Company's short-term and long-term borrowings at June 30, 2026 and December 31, 2025.
(Dollars in millions) | June 30, 2026 |  | December 31, 2025
Short-term borrowings |  |  |
Repurchase agreements | $ | 64 |  |  | $ | 49 |
Advances from FHLB | 4,550 |  |  | 2,100 |
Total short-term borrowings | $ | 4,614 |  |  | $ | 2,149 |
Long-term borrowings |  |  |
Senior notes — M&T | $ | 5,497 |  |  | $ | 5,583 |
Senior notes — M&T Bank | 3,142 |  |  | 1,946 |
Advances from FHLB | 3 |  |  | 3 |
Subordinated notes — M&T | 1,245 |  |  | 747 |
Subordinated notes — M&T Bank | 489 |  |  | 489 |
Junior subordinated debentures — M&T (a) | 403 |  |  | 403 |
Asset-backed notes (a) | 2,779 |  |  | 1,730 |
Other | 10 |  |  | 10 |
Total long-term borrowings | $ | 13,568 |  |  | $ | 10,911 |
__________________________________________________________________________________ (a) Further information about Junior Subordinated Debentures and asset-backed note financing transactions is provided in note 12. Information about the asset-backed notes issued to investors and the respective special purpose trust at June 30, 2026 and December 31, 2025 are included in the following table.
| (Dollars in millions) |  |  |  | June 30, 2026 |  | December 31, 2025
| Issue Date |  | Collateral Type |  | Remaining Loan Collateral Balance |  | Asset-Backed Notes to Investors |  | Weighted-Average Life (In years) |  | Weighted-Average Rate |  | Remaining Loan Collateral Balance |  | Asset-Backed Notes to Investors
| August 2023 |  | Equipment finance loans and leases |  | $ | 177 |  |  | $ | 78 |  |  | 0.4 |  | 5.74 | % |  | $ | 244 |  |  | $ | 141 |
| March 2024 |  | Automobile loans |  | 197 |  |  | 183 |  |  | 1.0 |  | 5.20 |  |  | 252 |  | 239
| August 2024 |  | Equipment finance loans and leases |  | 383 |  |  | 315 |  |  | 1.1 |  | 4.82 |  |  | 483 |  | 396
| February 2025 |  | Automobile loans |  | 424 |  |  | 407 |  |  | 1.2 |  | 4.71 |  |  | 529 |  |  | 513 |
| May 2025 |  | Equipment finance loans and leases |  | 461 |  |  | 373 |  |  | 1.5 |  | 4.77 |  |  | 546 |  |  | 441 |
| February 2026 |  | Recreational finance loans |  | 514 |  |  | 452 |  |  | 4.6 |  | 4.35 |  |  | — |  |  | — |
| May 2026 |  | Automobile loans |  | 976 |  |  | 971 |  |  | 1.6 |  | 4.43 |  |  | — |  |  | — |
|  |  |  |  |  |  | $ | 2,779 |  |  |  |  |  |  |  |  | $ | 1,730 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-5A Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-9 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-4 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-6 + Details
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