    <SEC-DOCUMENT>0001628280-24-040013-index.html : 20240910
    <SEC-HEADER>0001628280-24-040013.hdr.sgml : 20240910
    <ACCEPTANCE-DATETIME>20240910160139
    ACCESSION NUMBER:		0001628280-24-040013
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		55
    CONFORMED PERIOD OF REPORT:	20240910
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20240910
    DATE AS OF CHANGE:		20240910

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			M&T BANK CORP
    		CENTRAL INDEX KEY:			0000036270
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		ORGANIZATION NAME:           	02 Finance
    		IRS NUMBER:				160968385
    		STATE OF INCORPORATION:			NY
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-09861
    		FILM NUMBER:		241290042

    	BUSINESS ADDRESS:
    		STREET 1:		C/O CORPORATE REPORTING
    		STREET 2:		ONE M&T PLAZA 5TH FLOOR
    		CITY:			BUFFALO
    		STATE:			NY
    		ZIP:			14203
    		BUSINESS PHONE:		7168425390

    	MAIL ADDRESS:
    		STREET 1:		C/O CORPORATE REPORTING
    		STREET 2:		ONE M&T PLAZA 5TH FLR
    		CITY:			BUFFALO
    		STATE:			NY
    		ZIP:			14203

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	FIRST EMPIRE STATE CORP
    		DATE OF NAME CHANGE:	19920703
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>mbt-20240910.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: mbt-20240910.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>mtb_3q24xinvestorpresent.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: mtb_3q24xinvestorpresent.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>mbt-20240910.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 3 - file: mbt-20240910.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>4
    <FILENAME>mbt-20240910_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
    <TEXT>
    Document 4 - file: mbt-20240910_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>5
    <FILENAME>mbt-20240910_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: mbt-20240910_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>6
    <FILENAME>mbt-20240910_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 6 - file: mbt-20240910_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>mtb_3q24xinvestorpresent001.jpg
    <TEXT>
    Document 7 - file: mtb_3q24xinvestorpresent001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>mtb_3q24xinvestorpresent002.jpg
    <TEXT>
    Document 8 - file: mtb_3q24xinvestorpresent002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>mtb_3q24xinvestorpresent003.jpg
    <TEXT>
    Document 9 - file: mtb_3q24xinvestorpresent003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>mtb_3q24xinvestorpresent004.jpg
    <TEXT>
    Document 10 - file: mtb_3q24xinvestorpresent004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>mtb_3q24xinvestorpresent005.jpg
    <TEXT>
    Document 11 - file: mtb_3q24xinvestorpresent005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>mtb_3q24xinvestorpresent006.jpg
    <TEXT>
    Document 12 - file: mtb_3q24xinvestorpresent006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>mtb_3q24xinvestorpresent007.jpg
    <TEXT>
    Document 13 - file: mtb_3q24xinvestorpresent007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>mtb_3q24xinvestorpresent008.jpg
    <TEXT>
    Document 14 - file: mtb_3q24xinvestorpresent008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>mtb_3q24xinvestorpresent009.jpg
    <TEXT>
    Document 15 - file: mtb_3q24xinvestorpresent009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>mtb_3q24xinvestorpresent010.jpg
    <TEXT>
    Document 16 - file: mtb_3q24xinvestorpresent010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>mtb_3q24xinvestorpresent011.jpg
    <TEXT>
    Document 17 - file: mtb_3q24xinvestorpresent011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>mtb_3q24xinvestorpresent012.jpg
    <TEXT>
    Document 18 - file: mtb_3q24xinvestorpresent012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>mtb_3q24xinvestorpresent013.jpg
    <TEXT>
    Document 19 - file: mtb_3q24xinvestorpresent013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>mtb_3q24xinvestorpresent014.jpg
    <TEXT>
    Document 20 - file: mtb_3q24xinvestorpresent014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>mtb_3q24xinvestorpresent015.jpg
    <TEXT>
    Document 21 - file: mtb_3q24xinvestorpresent015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>mtb_3q24xinvestorpresent016.jpg
    <TEXT>
    Document 22 - file: mtb_3q24xinvestorpresent016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>mtb_3q24xinvestorpresent017.jpg
    <TEXT>
    Document 23 - file: mtb_3q24xinvestorpresent017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>mtb_3q24xinvestorpresent018.jpg
    <TEXT>
    Document 24 - file: mtb_3q24xinvestorpresent018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>mtb_3q24xinvestorpresent019.jpg
    <TEXT>
    Document 25 - file: mtb_3q24xinvestorpresent019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>mtb_3q24xinvestorpresent020.jpg
    <TEXT>
    Document 26 - file: mtb_3q24xinvestorpresent020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>mtb_3q24xinvestorpresent021.jpg
    <TEXT>
    Document 27 - file: mtb_3q24xinvestorpresent021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>mtb_3q24xinvestorpresent022.jpg
    <TEXT>
    Document 28 - file: mtb_3q24xinvestorpresent022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>mtb_3q24xinvestorpresent023.jpg
    <TEXT>
    Document 29 - file: mtb_3q24xinvestorpresent023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>mtb_3q24xinvestorpresent024.jpg
    <TEXT>
    Document 30 - file: mtb_3q24xinvestorpresent024.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>mtb_3q24xinvestorpresent025.jpg
    <TEXT>
    Document 31 - file: mtb_3q24xinvestorpresent025.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>mtb_3q24xinvestorpresent026.jpg
    <TEXT>
    Document 32 - file: mtb_3q24xinvestorpresent026.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>mtb_3q24xinvestorpresent027.jpg
    <TEXT>
    Document 33 - file: mtb_3q24xinvestorpresent027.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>mtb_3q24xinvestorpresent028.jpg
    <TEXT>
    Document 34 - file: mtb_3q24xinvestorpresent028.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>mtb_3q24xinvestorpresent029.jpg
    <TEXT>
    Document 35 - file: mtb_3q24xinvestorpresent029.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>mtb_3q24xinvestorpresent030.jpg
    <TEXT>
    Document 36 - file: mtb_3q24xinvestorpresent030.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>mtb_3q24xinvestorpresent031.jpg
    <TEXT>
    Document 37 - file: mtb_3q24xinvestorpresent031.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>mtb_3q24xinvestorpresent032.jpg
    <TEXT>
    Document 38 - file: mtb_3q24xinvestorpresent032.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>mtb_3q24xinvestorpresent033.jpg
    <TEXT>
    Document 39 - file: mtb_3q24xinvestorpresent033.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>mtb_3q24xinvestorpresent034.jpg
    <TEXT>
    Document 40 - file: mtb_3q24xinvestorpresent034.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>mtb_3q24xinvestorpresent035.jpg
    <TEXT>
    Document 41 - file: mtb_3q24xinvestorpresent035.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>42
    <FILENAME>mtb_3q24xinvestorpresent036.jpg
    <TEXT>
    Document 42 - file: mtb_3q24xinvestorpresent036.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>43
    <FILENAME>mtb_3q24xinvestorpresent037.jpg
    <TEXT>
    Document 43 - file: mtb_3q24xinvestorpresent037.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>44
    <FILENAME>mtb_3q24xinvestorpresent038.jpg
    <TEXT>
    Document 44 - file: mtb_3q24xinvestorpresent038.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>45
    <FILENAME>mtb_3q24xinvestorpresent039.jpg
    <TEXT>
    Document 45 - file: mtb_3q24xinvestorpresent039.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>46
    <FILENAME>mtb_3q24xinvestorpresent040.jpg
    <TEXT>
    Document 46 - file: mtb_3q24xinvestorpresent040.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>48
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 48 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>49
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 49 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>50
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 50 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>51
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 51 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>53
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 53 - file: FilingSummary.html

    Document 53 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>55
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 55 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>56
    <FILENAME>0001628280-24-040013-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 56 - file: 0001628280-24-040013-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>57
    <FILENAME>mbt-20240910_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 57 - file: mbt-20240910_htm.html

    Document 57 - RAW XML: mbt-20240910_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>