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Regulatory matters (Tables) | 12 Months Ended
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Dec. 31, 2024
Regulatory Capital Requirements under Banking Regulations [Abstract] |
Summary of Required Minimum and Well Capitalized Capital Ratios | Pursuant to the rules in effect as of December 31, 2024, the required minimum and well capitalized capital ratios are as follows:
| Minimum |  | Well Capitalized
M&T (Consolidated) |  |  |
CET1 capital to RWA | 4.5 | % |  |
Tier 1 capital to RWA | 6.0 |  |  | 6.0 | %
Total capital to RWA | 8.0 |  |  | 10.0 |
Leverage — Tier 1 capital to average total assets, as defined | 4.0 |  |  |
| Minimum |  | Well Capitalized
Bank Subsidiaries |  |  |
CET1 capital to RWA | 4.5 | % |  | 6.5 | %
Tier 1 capital to RWA | 6.0 |  |  | 8.0 |
Total capital to RWA | 8.0 |  |  | 10.0 |
Leverage — Tier 1 capital to average total assets, as defined | 4.0 |  |  | 5.0 |
Capital Ratios and Amounts of Company and its Banking Subsidiaries | The capital ratios and amounts of the Company and its banking subsidiaries as of December 31, 2024 and 2023 are presented below:
(Dollars in millions) | M&T (Consolidated) |  | M&T Bank |  | Wilmington Trust, N.A.
December 31, 2024 |  |  |  |  |
CET1 capital |  |  |  |  |
Amount | $ | 18,299 |  |  | $ | 19,233 |  |  | $ | 603 |
Ratio(a) | 11.68 | % |  | 12.32 | % |  | 269.64 | %
Tier 1 capital |  |  |  |  |
Amount | $ | 20,692 |  |  | $ | 19,233 |  |  | $ | 603 |
Ratio(a) | 13.21 | % |  | 12.32 | % |  | 269.64 | %
Total capital |  |  |  |  |
Amount | $ | 23,073 |  |  | $ | 21,387 |  |  | $ | 604 |
Ratio(a) | 14.73 | % |  | 13.70 | % |  | 269.88 | %
Leverage |  |  |  |  |
Amount | $ | 20,692 |  |  | $ | 19,233 |  |  | $ | 603 |
Ratio(b) | 10.17 | % |  | 9.48 | % |  | 83.37 | %
December 31, 2023 |  |  |  |  |
CET1 capital |  |  |  |  |
Amount | $ | 16,908 |  |  | $ | 17,667 |  |  | $ | 583 |
Ratio(a) | 10.98 | % |  | 11.53 | % |  | 263.48 | %
Tier 1 capital |  |  |  |  |
Amount | $ | 18,918 |  |  | $ | 17,667 |  |  | $ | 583 |
Ratio(a) | 12.29 | % |  | 11.53 | % |  | 263.48 | %
Total capital |  |  |  |  |
Amount | $ | 21,533 |  |  | $ | 19,884 |  |  | $ | 584 |
Ratio(a) | 13.99 | % |  | 12.97 | % |  | 263.85 | %
Leverage |  |  |  |  |
Amount | $ | 18,918 |  |  | $ | 17,667 |  |  | $ | 583 |
Ratio(b) | 9.43 | % |  | 8.83 | % |  | 86.00 | %
__________________________________________________________________________________ (a)The ratio of capital to RWA, as defined by regulation. (b)The ratio of capital to average assets, as defined by regulation.

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- Definition Schedule Of Minimum Capital Required To Be Well Capitalized Under Banking Regulations + References No definition available. + Details
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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B + Details
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