XML 19 R8.htm IDEA: XBRL DOCUMENT
v3.24.3

Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Common stock per share dividend amount (in USD per share) | $ 1.35 | $ 1.30 | $ 4.00 | $ 3.90
Preferred Series E |  |  |  |
Preferred stock per share dividend amount (in USD per share) | 23.50 | $ 16.125 | 62.575 | $ 48.375
Preferred Series F |  |  |  |
Preferred stock per share dividend amount (in USD per share) | 128.125 |  | 384.375 |
Preferred Series G |  |  |  |
Preferred stock per share dividend amount (in USD per share) | 125.00 |  | 375.00 |
Series H Preferred Stock |  |  |  |
Preferred stock per share dividend amount (in USD per share) | 0.3516 |  | 1.0547 |
Preferred Series I |  |  |  |
Preferred stock per share dividend amount (in USD per share) | 87.50 |  | 262.50 |
Series J Preferred Stock |  |  |  |
Preferred stock per share dividend amount (in USD per share) | $ 254.17 |  | $ 254.17 |

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate dividends declared during the period for each share of preferred stock outstanding. + References No definition available. + Details
Name: | us-gaap_PreferredStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesEPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesFPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesGPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesHPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=mtb_SeriesIPreferredStocksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=mtb_SeriesJPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |