Significant accounting policies (Policies)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Basis of Accounting

The consolidated financial statements of M&T Bank Corporation (“M&T”) and subsidiaries (“the Company”) were compiled in accordance with generally accepted accounting principles (“GAAP”) using the accounting policies set forth in note 1 of Notes to Financial Statements included in Form 10-K for the year ended December 31, 2017 (“2017 Annual Report”), except that effective January 1, 2018 the Company adopted amended accounting guidance that is discussed in notes 2, 15 and 16 herein.  In the opinion of management, all adjustments necessary for a fair presentation have been made and were all of a normal recurring nature.