Regulatory matters (Tables)

12 Months Ended

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		%

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(a)The ratio of capital to RWA, as defined by regulation.

(b)The ratio of capital to average assets, as defined by regulation.