Subsequent Events	6 Months Ended
Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	17. Subsequent Events On July 30, 2019, M&T issued 40,000 shares of Series G Perpetual Fixed-Rate Reset Non-cumulative Preferred Stock, par value $1.00 per share and liquidation preference of $10,000 per share. Through July 31, 2024 holders of the Series G preferred stock are entitled to receive, only when, as and if declared by M&T’s Board of Directors, non-cumulative cash dividends at an annual rate of 5.0%, payable semiannually in arrears. Subsequent to July 31, 2024 holders will be entitled to receive, only when, as and if declared by M&T’s Board of Directors, non-cumulative cash dividends at an annual rate of the five-year U.S. Treasury Rate plus 3.174%, payable semiannually in arrears. The Series G preferred stock may be redeemed at M&T’s option, in whole or in part, on any dividend payment date on or after August 1, 2024 or, in whole but not in part, at any time within 90 days following a regulatory capital treatment event whereby the full liquidation value of the shares no longer qualifies as “additional Tier 1 capital.” In addition, M&T expects to redeem the 230,000 shares issued and outstanding of the Series A and 151,500 shares issued and outstanding of the Series C Fixed Rate Cumulative Perpetual Preferred Stock, $1,000 liquidation preference per share on August 30, 2019, having received the approval of the Federal Reserve to redeem such shares after issuing the Series G preferred stock.

Subsequent Events

6 Months Ended

Jun. 30, 2019

17. Subsequent Events

On July 30, 2019, M&T issued 40,000 shares of Series G Perpetual Fixed-Rate Reset Non-cumulative Preferred Stock, par value $1.00 per share and liquidation preference of $10,000 per share. Through July 31, 2024 holders of the Series G preferred stock are entitled to receive, only when, as and if declared by M&T’s Board of Directors, non-cumulative cash dividends at an annual rate of 5.0%, payable semiannually in arrears. Subsequent to July 31, 2024 holders will be entitled to receive, only when, as and if declared by M&T’s Board of Directors, non-cumulative cash dividends at an annual rate of the five-year U.S. Treasury Rate plus 3.174%, payable semiannually in arrears. The Series G preferred stock may be redeemed at M&T’s option, in whole or in part, on any dividend payment date on or after August 1, 2024 or, in whole but not in part, at any time within 90 days following a regulatory capital treatment event whereby the full liquidation value of the shares no longer qualifies as “additional Tier 1 capital.”

In addition, M&T expects to redeem the 230,000 shares issued and outstanding of the Series A and 151,500 shares issued and outstanding of the Series C Fixed Rate Cumulative Perpetual Preferred Stock, $1,000 liquidation preference per share on August 30, 2019, having received the approval of the Federal Reserve to redeem such shares after issuing the Series G preferred stock.