10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2018

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 1-9861

M&T BANK CORPORATION

(Exact name of registrant as specified in its charter)

New York	16-0968385
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
One M & T Plaza Buffalo, New York	14203
(Address of principal executive offices)	(Zip Code)

(716) 635-4000

(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    ☒  Yes    ☐  No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     ☒  Yes    ☐  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company.  See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	☒		Accelerated filer	☐
Non-accelerated filer	☐	(Do not check if a smaller reporting company)	Smaller reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     ☐  Yes    ☒  No

Number of shares of the registrant's Common Stock, $0.50 par value, outstanding as of the close of business on July 27, 2018: 143,790,862 shares.

M&T BANK CORPORATION

FORM 10-Q

For the Quarterly Period Ended June 30, 2018

Table of Contents of Information Required in Report		Page
Part I.  FINANCIAL INFORMATION
Item 1.	Financial Statements.
	CONSOLIDATED BALANCE SHEET - June 30, 2018 and December 31, 2017	3
	CONSOLIDATED STATEMENT OF INCOME – Three and six months ended June 30, 2018 and 2017	4
	CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME – Three and six months ended June 30, 2018 and 2017	5
	CONSOLIDATED STATEMENT OF CASH FLOWS - Six months ended June 30, 2018 and 2017	6
	CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY – Six months ended June 30, 2018 and 2017	7
	NOTES TO FINANCIAL STATEMENTS	8
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations.	49
Item 3.	Quantitative and Qualitative Disclosures About Market Risk.	84
Item 4.	Controls and Procedures.	84
Part II. OTHER INFORMATION
Item 1.	Legal Proceedings.	84
Item 1A.	Risk Factors.	86
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds.	86
Item 3.	Defaults Upon Senior Securities.	86
Item 4.	Mine Safety Disclosures.	86
Item 5.	Other Information.	86
Item 6.	Exhibits.	87
SIGNATURES		87

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PART I. FINANCIAL INFORMATION

Item 1. Financial Statements.

M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEET (Unaudited)

		June 30,			December 31,
Dollars in thousands, except per share		2018			2017
Assets	Cash and due from banks	$	1,367,594		$	1,420,888
	Interest-bearing deposits at banks		6,669,985			5,078,903
	Federal funds sold		1,500			—
	Trading account		148,303			132,909
	Investment securities (includes pledged securities that can be sold or repledged of    $473,505 at June 30, 2018; $487,151 at December 31, 2017)
	Available for sale (cost: $9,912,160 at June 30, 2018;    $10,938,796 at December 31, 2017)		9,658,846			10,896,284
	Held to maturity (fair value: $3,022,329 at June 30, 2018;    $3,341,762 at December 31, 2017)		3,101,095			3,353,213
	Equity and other securities (cost: $507,389 at June 30, 2018;    $415,028 at December 31, 2017)		523,061			415,028
	Total investment securities		13,283,002			14,664,525
	Loans and leases		88,059,392			88,242,886
	Unearned discount		(261,942	)		(253,903	)
	Loans and leases, net of unearned discount		87,797,450			87,988,983
	Allowance for credit losses		(1,019,248	)		(1,017,198	)
	Loans and leases, net		86,778,202			86,971,785
	Premises and equipment		637,809			646,451
	Goodwill		4,593,112			4,593,112
	Core deposit and other intangible assets		58,569			71,589
	Accrued interest and other assets		4,887,977			5,013,325
	Total assets	$	118,426,053		$	118,593,487
Liabilities	Noninterest-bearing deposits	$	32,086,191		$	33,975,180
	Savings and interest-checking deposits		51,107,290			51,698,008
	Time deposits		5,817,680			6,580,962
	Deposits at Cayman Islands office		261,427			177,996
	Total deposits		89,272,588			92,432,146
	Short-term borrowings		3,239,416			175,099
	Accrued interest and other liabilities		1,953,848			1,593,993
	Long-term borrowings		8,382,316			8,141,430
	Total liabilities		102,848,168			102,342,668
Shareholders' equity	Preferred stock, $1.00 par, 1,000,000 shares authorized;    Issued and outstanding: Liquidation preference of $1,000 per    share: 731,500 shares at June 30, 2018 and December 31,    2017; Liquidation preference of $10,000 per share: 50,000    shares at June 30, 2018 and December 31, 2017		1,231,500			1,231,500
	Common stock, $.50 par, 250,000,000 shares authorized,    159,767,147 shares issued at June 30, 2018;    159,817,518 shares issued at December 31, 2017		79,884			79,909
	Common stock issuable, 24,447 shares at June 30, 2018;    27,138 shares at December 31, 2017		1,691			1,847
	Additional paid-in capital		6,579,395			6,590,855
	Retained earnings		10,763,638			10,164,804
	Accumulated other comprehensive income (loss), net		(517,941	)		(363,814	)
	Treasury stock — common, at cost — 15,530,445 shares at June 30, 2018;     9,733,115 shares at December 31, 2017		(2,560,282	)		(1,454,282	)
	Total shareholders’ equity		15,577,885			16,250,819
	Total liabilities and shareholders’ equity	$	118,426,053		$	118,593,487

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M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF INCOME (Unaudited)

		Three Months Ended June 30					Six Months Ended June 30
In thousands, except per share		2018		2017			2018			2017
Interest income	Loans and leases, including fees	$	1,024,471		924,640		$	2,004,440			1,822,678
	Investment securities
	Fully taxable		82,019		92,996			164,871			188,120
	Exempt from federal taxes		172		379			420			809
	Deposits at banks		21,869		12,213			40,546			24,375
	Other		374		185			778			464
	Total interest income		1,128,905		1,030,413			2,211,055			2,036,446
Interest expense	Savings and interest-checking deposits		48,738		30,543			89,265			56,177
	Time deposits		11,362		16,303			22,298			35,301
	Deposits at Cayman Islands office		542		281			923			546
	Short-term borrowings		1,383		378			2,266			594
	Long-term borrowings		58,093		44,708			111,999			91,368
	Total interest expense		120,118		92,213			226,751			183,986
	Net interest income		1,008,787		938,200			1,984,304			1,852,460
	Provision for credit losses		35,000		52,000			78,000			107,000
	Net interest income after provision for credit losses		973,787		886,200			1,906,304			1,745,460
Other income	Mortgage banking revenues		92,499		86,163			179,805			170,855
	Service charges on deposit accounts		106,784		106,057			211,899			210,233
	Trust income		137,641		126,797			269,016			246,812
	Brokerage services income		12,629		16,617			26,021			34,001
	Trading account and foreign exchange gains		5,255		8,084			9,892			17,775
	Gain (loss) on bank investment securities		2,326		(17	)		(7,105	)		(17	)
	Other revenues from operations		100,280		117,115			226,582			228,002
	Total other income		457,414		460,816			916,110			907,661
Other expense	Salaries and employee benefits		418,537		398,054			881,965			847,795
	Equipment and net occupancy		73,031		73,797			147,828			148,163
	Outside data processing and software		49,712		44,575			98,141			88,876
	FDIC assessments		19,560		25,353			39,840			54,180
	Advertising and marketing		21,768		16,324			38,016			32,434
	Printing, postage and supplies		8,719		8,957			18,038			18,665
	Amortization of core deposit and other intangible assets		6,388		8,113			13,020			16,533
	Other costs of operations		178,862		175,462			473,073			331,841
	Total other expense		776,577		750,635			1,709,921			1,538,487
	Income before taxes		654,624		596,381			1,112,493			1,114,634
	Income taxes		161,464		215,328			266,723			384,654
	Net income	$	493,160		381,053		$	845,770			729,980
	Net income available to common shareholders
	Basic	$	472,598		360,658		$	805,338			689,208
	Diluted		472,600		360,662			805,342			689,217
	Net income per common share
	Basic	$	3.26		2.36		$	5.49			4.49
	Diluted		3.26		2.35			5.48			4.47
	Cash dividends per common share	$	.80		.75		$	1.55			1.50
	Average common shares outstanding
	Basic		144,825		152,857			146,746			153,638
	Diluted		144,998		153,276			146,941			154,108

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M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited)

	Three Months Ended June 30						Six Months Ended June 30
In thousands	2018			2017			2018			2017
Net income	$	493,160			381,053		$	845,770			729,980
Other comprehensive income, net of tax and reclassification adjustments:
Net unrealized gains (losses) on investment securities		(36,733	)		16,932			(137,417	)		15,576
Cash flow hedges adjustments		(2,569	)		(955	)		(13,011	)		(978	)
Foreign currency translation adjustment		(2,434	)		1,150			(1,144	)		1,626
Defined benefit plans liability adjustments		7,038			4,359			14,298			8,331
Total other comprehensive income (loss)		(34,698	)		21,486			(137,274	)		24,555
Total comprehensive income	$	458,462			402,539		$	708,496			754,535

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M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited)

		Six Months Ended June 30
In thousands		2018			2017
Cash flows from operating    activities	Net income	$	845,770			729,980
	Adjustments to reconcile net income to net cash provided by operating activities
	Provision for credit losses		78,000			107,000
	Depreciation and amortization of premises and equipment		54,092			54,901
	Amortization of capitalized servicing rights		24,207			27,984
	Amortization of core deposit and other intangible assets		13,020			16,533
	Provision for deferred income taxes		(123,980	)		17,136
	Asset write-downs		5,237			8,797
	Net gain on sales of assets		(8,738	)		(21,272	)
	Net change in accrued interest receivable, payable		5,759			(6,350	)
	Net change in other accrued income and expense		255,124			50,660
	Net change in loans originated for sale		(756,003	)		545,864
	Net change in trading account assets and liabilities		128,754			92,054
	Net cash provided by operating activities		521,242			1,623,287
Cash flows from investing    activities	Proceeds from sales of investment securities
	Available for sale		418			512,129
	Equity and other securities		505,841			31,016
	Proceeds from maturities of investment securities
	Available for sale		950,071			1,151,982
	Held to maturity		247,385			245,105
	Purchases of investment securities
	Available for sale		(5,799	)		(244,449	)
	Held to maturity		—			(1,175,608	)
	Equity and other securities		(520,040	)		(68,825	)
	Net decrease in loans and leases		859,071			1,134,470
	Net increase in interest-bearing deposits at banks		(1,591,082	)		(23,191	)
	Capital expenditures, net		(37,116	)		(49,862	)
	Net decrease in loan servicing advances		262,947			104,289
	Other, net		(8,708	)		47,742
	Net cash provided by investing activities		662,988			1,664,798
Cash flows from financing    activities	Net decrease in deposits		(3,157,898	)		(1,949,877	)
	Net increase in short-term borrowings		3,064,317			1,532,011
	Proceeds from long-term borrowings		999,594			898,200
	Payments on long-term borrowings		(706,370	)		(2,728,059	)
	Purchases of treasury stock		(1,196,062	)		(756,967	)
	Dividends paid — common		(227,565	)		(230,652	)
	Dividends paid — preferred		(36,260	)		(36,474	)
	Other, net		24,220			8,662
	Net cash used by financing activities		(1,236,024	)		(3,263,156	)
	Net increase (decrease) in cash, cash equivalents and restricted cash		(51,794	)		24,929
	Cash, cash equivalents and restricted cash at beginning of period		1,420,888			1,320,549
	Cash, cash equivalents and restricted cash at end of period	$	1,369,094			1,345,478
Supplemental disclosure of cash    flow information	Interest received during the period	$	2,210,063			2,038,009
	Interest paid during the period		218,731			199,621
	Income taxes paid during the period		175,619			321,106
Supplemental schedule of    noncash investing and financing    activities	Real estate acquired in settlement of loans	$	36,418			57,202
	Securitization of residential mortgage loans allocated to
	Available-for-sale investment securities		10,303			10,025
	Capitalized servicing rights		150			106

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M&T BANK CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS’ EQUITY (Unaudited)

															Accumulated
															Other
						Common			Additional						Comprehensive
	Preferred		Common			Stock			Paid-in			Retained			Income			Treasury
Dollars in thousands, except per share	Stock		Stock			Issuable			Capital			Earnings			(Loss), Net			Stock			Total
2017
Balance — January 1, 2017	$	1,231,500		79,973			2,145			6,676,948			9,222,488			(294,636	)		(431,796	)		16,486,622
Total comprehensive income		—		—			—			—			729,980			24,555			—			754,535
Preferred stock cash dividends		—		—			—			—			(36,474	)		—			—			(36,474	)
Exercise of 146,157 Series A stock    warrants into 79,470 shares of    common stock		—		—			—			(10,443	)		—			—			10,443			—
Purchases of treasury stock		—		—			—			—			—			—			(756,967	)		(756,967	)
Stock-based compensation plans:
Compensation expense, net		—		(62	)		—			(58,749	)		—			—			56,290			(2,521	)
Exercises of stock options, net		—		—			—			(5,354	)		—			—			62,428			57,074
Stock purchase plan		—		—			—			2,563			—			—			8,268			10,831
Directors’ stock plan		—		—			—			173			—			—			792			965
Deferred compensation plans, net,    including dividend equivalents		—		—			(205	)		(208	)		(43	)		—			401			(55	)
Common stock cash dividends —    $1.50 per share		—		—			—			—			(230,473	)		—			—			(230,473	)
Balance — June 30, 2017	$	1,231,500		79,911			1,940			6,604,930			9,685,478			(270,081	)		(1,050,141	)		16,283,537
2018
Balance — January 1, 2018	$	1,231,500		79,909			1,847			6,590,855			10,164,804			(363,814	)		(1,454,282	)		16,250,819
Cumulative effect of change in    accounting principle — equity    securities		—		—			—			—			16,853			(16,853	)		—			—
Total comprehensive income		—		—			—			—			845,770			(137,274	)		—			708,496
Preferred stock cash dividends		—		—			—			—			(36,260	)		—			—			(36,260	)
Exercise of 54,226 Series A stock    warrants into 32,668 shares of    common stock		—		—			—			(5,123	)		—			—			5,123			—
Purchases of treasury stock		—		—			—			—			—			—			(1,196,062	)		(1,196,062	)
Stock-based compensation plans:
Compensation expense, net		—		(25	)		—			(6,194	)		—			—			21,665			15,446
Exercises of stock options, net		—		—			—			(2,402	)		—			—			53,073			50,671
Stock purchase plan		—		—			—			2,358			—			—			8,766			11,124
Directors’ stock plan		—		—			—			149			—			—			1,043			1,192
Deferred compensation plans, net,    including dividend equivalents		—		—			(156	)		(248	)		(37	)		—			392			(49	)
Common stock cash dividends —    $1.55 per share		—		—			—			—			(227,492	)		—			—			(227,492	)
Balance — June 30, 2018	$	1,231,500		79,884			1,691			6,579,395			10,763,638			(517,941	)		(2,560,282	)		15,577,885

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NOTES TO FINANCIAL STATEMENTS

1. Significant accounting policies

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.

2. Investment securities

On January 1, 2018, the Company adopted amended guidance requiring equity investments with readily determinable fair values to be measured at fair value with changes in fair value recognized in the consolidated statement of income.  This amended guidance excludes equity method investments, investments in consolidated subsidiaries, exchange membership ownership interests, and Federal Home Loan Bank of New York and Federal Reserve Bank of New York capital stock.  Upon adoption the Company reclassified $17 million, after-tax effect, from accumulated other comprehensive income to retained earnings, representing the difference between fair value and the cost basis of equity investments with readily determinable fair values at January 1, 2018. Net unrealized gains recorded as gain (loss) on bank investment securities in the consolidated statement of income during the three months ended June 30, 2018 were $2 million and net unrealized losses during the six months ended June 30, 2018 were $7 million. The amortized cost and estimated fair value of investment securities were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
June 30, 2018
Investment securities available for sale:
U.S. Treasury and federal agencies	$	1,726,242		4		18,425	$	1,707,821
Obligations of states and political subdivisions		1,914		12		1		1,925
Mortgage-backed securities:
Government issued or guaranteed		8,046,603		15,521		244,825		7,817,299
Privately issued		26		—		2		24
Other debt securities		137,375		2,225		7,823		131,777
		9,912,160		17,762		271,076		9,658,846
Investment securities held to maturity:
Obligations of states and political subdivisions		13,547		57		20		13,584
Mortgage-backed securities:
Government issued or guaranteed		2,960,045		4,539		71,183		2,893,401
Privately issued		122,906		11,451		23,610		110,747
Other debt securities		4,597		—		—		4,597
		3,101,095		16,047		94,813		3,022,329
Total debt securities	$	13,013,255		33,809		365,889	$	12,681,175
Equity and other securities:
Readily marketable equity — at fair value		70,810		16,527		855		86,482
Other — at cost		436,579		—		—		436,579
Total equity and other securities	$	507,389		16,527		855	$	523,061

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

2. Investment securities, continued

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
December 31, 2017
Investment securities available for sale:
U.S. Treasury and federal agencies	$	1,965,665		—		18,178	$	1,947,487
Obligations of states and political subdivisions		2,555		36		2		2,589
Mortgage-backed securities:
Government issued or guaranteed		8,755,482		59,497		98,587		8,716,392
Privately issued		28		—		—		28
Other debt securities		136,905		2,402		10,475		128,832
Equity securities		78,161		23,219		424		100,956
		10,938,796		85,154		127,666		10,896,284
Investment securities held to maturity:
Obligations of states and political subdivisions		24,562		109		49		24,622
Mortgage-backed securities:
Government issued or guaranteed		3,187,953		27,236		13,746		3,201,443
Privately issued		135,688		2,574		27,575		110,687
Other debt securities		5,010		—		—		5,010
		3,353,213		29,919		41,370		3,341,762
Other securities — at cost		415,028		—		—		415,028
Total	$	14,707,037		115,073		169,036	$	14,653,074

There were no significant gross realized gains or losses from sales of investment securities for the three-month and six-month periods ended June 30, 2018 and 2017, respectively.

At June 30, 2018, the amortized cost and estimated fair value of debt securities by contractual maturity were as follows:

	Amortized Cost		Estimated Fair Value
	(In thousands)
Debt securities available for sale:
Due in one year or less	$	1,297,040		1,286,504
Due after one year through five years		436,548		428,617
Due after five years through ten years		96,521		95,992
Due after ten years		35,422		30,410
		1,865,531		1,841,523
Mortgage-backed securities available for sale		8,046,629		7,817,323
	$	9,912,160		9,658,846
Debt securities held to maturity:
Due in one year or less	$	7,630		7,633
Due after one year through five years		5,917		5,951
Due after ten years		4,597		4,597
		18,144		18,181
Mortgage-backed securities held to maturity		3,082,951		3,004,148
	$	3,101,095		3,022,329

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

2. Investment securities, continued

A summary of investment securities that as of June 30, 2018 and December 31, 2017 had been in a continuous unrealized loss position for less than twelve months and those that had been in a continuous unrealized loss position for twelve months or longer follows:

	Less Than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
June 30, 2018
Investment securities available for sale:
U.S. Treasury and federal agencies	$	164,931		(1,622	)		1,539,796		(16,803	)
Obligations of states and political subdivisions		—		—			375		(1	)
Mortgage-backed securities:
Government issued or guaranteed		3,872,321		(91,083	)		2,907,972		(153,742	)
Privately issued		8		(2	)		—		—
Other debt securities		4,323		(94	)		63,902		(7,729	)
		4,041,583		(92,801	)		4,512,045		(178,275	)
Investment securities held to maturity:
Obligations of states and political subdivisions		—		—			4,218		(20	)
Mortgage-backed securities:
Government issued or guaranteed		2,252,672		(58,405	)		250,341		(12,778	)
Privately issued		—		—			53,579		(23,610	)
		2,252,672		(58,405	)		308,138		(36,408	)
Total	$	6,294,255		(151,206	)		4,820,183		(214,683	)
December 31, 2017
Investment securities available for sale:
U.S. Treasury and federal agencies	$	278,132		(1,761	)		1,669,355		(16,417	)
Obligations of states and political subdivisions		—		—			474		(2	)
Mortgage-backed securities:
Government issued or guaranteed		2,106,142		(13,695	)		3,138,841		(84,892	)
Other debt securities		3,067		(26	)		61,159		(10,449	)
Equity securities (a)		—		—			18,162		(424	)
		2,387,341		(15,482	)		4,887,991		(112,184	)
Investment securities held to maturity:
Obligations of states and political subdivisions		2,954		(4	)		6,110		(45	)
Mortgage-backed securities:
Government issued or guaranteed		1,331,759		(7,036	)		265,695		(6,710	)
Privately issued		5,061		(1,216	)		55,255		(26,359	)
		1,339,774		(8,256	)		327,060		(33,114	)
Total	$	3,727,115		(23,738	)		5,215,051		(145,298	)

(a) Beginning January 1, 2018, equity securities with readily determinable fair values are required to be measured at fair value with changes in fair value recognized in the consolidated statement of income. As a result, subsequent to December 31, 2017 disclosing the time period for which these equity securities had been in a continuous unrealized loss position is no longer relevant.

- 10 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

2. Investment securities, continued

The Company owned 1,487 individual debt securities with aggregate gross unrealized losses of $366 million at June 30, 2018. Based on a review of each of the securities in the investment securities portfolio at June 30, 2018, the Company concluded that it expected to recover the amortized cost basis of its investment.  As of June 30, 2018, the Company does not intend to sell nor is it anticipated that it would be required to sell any of its impaired investment securities at a loss.  At June 30, 2018, the Company has not identified events or changes in circumstances which may have a significant adverse effect on the fair value of the $437 million of cost method equity securities.

3. Loans and leases and the allowance for credit losses

A summary of current, past due and nonaccrual loans as of June 30, 2018 and December 31, 2017 follows:

	Current		30-89 Days Past Due		Accruing LoansPast Due 90 Days or More (a)		Accruing Loans Acquiredat a Discount Past Due 90 days or More (b)		Purchased Impaired (c)		Nonaccrual		Total
	(In thousands)
June 30, 2018
Commercial, financial, leasing, etc.	$	21,615,676		29,906		4,210		31		3		245,031	$	21,894,857
Real estate:
Commercial		25,352,075		212,480		10,621		4,330		10,579		153,552		25,743,637
Residential builder and developer		1,628,793		8,668		—		—		547		5,212		1,643,220
Other commercial construction		6,597,814		140,490		4,000		—		1,053		7,723		6,751,080
Residential		14,456,180		425,894		200,159		8,019		244,865		215,850		15,550,967
Residential — limited documentation		2,488,340		79,179		—		—		95,418		96,808		2,759,745
Consumer:
Home equity lines and loans		4,931,331		29,589		49		6,856		—		66,690		5,034,515
Automobile		3,450,113		69,398		—		—		—		19,564		3,539,075
Other		4,807,912		30,732		3,987		28,169		—		9,554		4,880,354
Total	$	85,328,234		1,026,336		223,026		47,405		352,465		819,984	$	87,797,450
December 31, 2017
Commercial, financial, leasing, etc.	$	21,332,234		167,756		1,322		327		21		240,991	$	21,742,651
Real estate:
Commercial		24,910,381		166,305		4,444		6,016		16,815		184,982		25,288,943
Residential builder and developer		1,618,973		5,159		—		—		1,135		6,451		1,631,718
Other commercial construction		6,407,451		23,467		—		—		4,706		10,088		6,445,712
Residential		15,376,759		474,372		233,437		7,582		282,102		235,834		16,610,086
Residential — limited documentation		2,718,019		83,898		—		—		105,236		96,105		3,003,258
Consumer:
Home equity lines and loans		5,171,345		38,546		—		9,391		—		74,500		5,293,782
Automobile		3,441,371		78,511		—		—		—		23,781		3,543,663
Other		4,349,071		40,929		5,202		24,102		—		9,866		4,429,170
Total	$	85,325,604		1,078,943		244,405		47,418		410,015		882,598	$	87,988,983

(a) Excludes loans acquired at a discount.

(b) Loans acquired at a discount that were recorded at fair value at acquisition date.  This category does not include purchased impaired loans that are presented separately.

(c) Accruing loans acquired at a discount that were impaired at acquisition date and recorded at fair value.

- 11 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Loans and leases and the allowance for credit losses, continued

One-to-four family residential mortgage loans held for sale were $283 million and $356 million at June 30, 2018 and December 31, 2017, respectively.  Commercial real estate loans held for sale were $868 million at June 30, 2018 and $22 million at December 31, 2017.

The outstanding principal balance and the carrying amount of loans acquired at a discount that were recorded at fair value at the acquisition date and included in the consolidated balance sheet were as follows:

	June 30,		December 31,
	2018		2017
	(In thousands)
Outstanding principal balance	$	1,213,758		1,394,188
Carrying amount:
Commercial, financial, leasing, etc.		27,726		31,105
Commercial real estate		183,126		228,054
Residential real estate		545,438		620,827
Consumer		107,492		123,413
	$	863,782		1,003,399

Purchased impaired loans included in the table above totaled $352 million at June 30, 2018 and $410 million at December 31, 2017, representing less than 1% of the Company’s assets as of each date.  A summary of changes in the accretable yield for loans acquired at a discount for the three months and six months ended June 30, 2018 and 2017 follows:

	Three Months Ended June 30,
	2018						2017
	Purchased			Other			Purchased			Other
	Impaired			Acquired			Impaired			Acquired
	(In thousands)
Balance at beginning of period	$	149,007			118,184		$	143,454		$	181,310
Interest income		(7,969	)		(15,394	)		(10,806	)		(20,923	)
Reclassifications from nonaccretable balance		8,350			10,998			884			1,852
Other (a)		—			3,927			—			860
Balance at end of period	$	149,388			117,715		$	133,532		$	163,099

	Six Months Ended June 30,
	2018						2017
	Purchased			Other			Purchased			Other
	Impaired			Acquired			Impaired			Acquired
	(In thousands)
Balance at beginning of period	$	157,918		$	133,162		$	154,233			201,153
Interest income		(17,788	)		(30,506	)		(21,731	)		(46,441	)
Reclassifications from nonaccretable balance		9,258			11,205			1,030			5,035
Other (a)		—			3,854			—			3,352
Balance at end of period	$	149,388		$	117,715		$	133,532			163,099

(a) Other changes in expected cash flows including changes in interest rates and prepayment assumptions.

- 12 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Loans and leases and the allowance for credit losses, continued

Changes in the allowance for credit losses for the three months ended June 30, 2018 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	326,071			367,717			73,047			173,841			78,995		$	1,019,671
Provision for credit losses		11,250			(10,845	)		5,242			30,801			(1,448	)		35,000
Net charge-offs
Charge-offs		(14,900	)		(4,548	)		(3,966	)		(34,033	)		—			(57,447	)
Recoveries		6,409			1,437			1,800			12,378			—			22,024
Net charge-offs		(8,491	)		(3,111	)		(2,166	)		(21,655	)		—			(35,423	)
Ending balance	$	328,830			353,761			76,123			182,987			77,547		$	1,019,248

Changes in the allowance for credit losses for the three months ended June 30, 2017 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	347,760			360,010			62,012			153,172			78,476		$	1,001,430
Provision for credit losses		13,368			7,638			7,163			24,190			(359	)		52,000
Net charge-offs
Charge-offs		(25,247	)		(1,853	)		(5,899	)		(28,683	)		—			(61,682	)
Recoveries		3,433			434			2,730			9,880			—			16,477
Net charge-offs		(21,814	)		(1,419	)		(3,169	)		(18,803	)		—			(45,205	)
Ending balance	$	339,314			366,229			66,006			158,559			78,117		$	1,008,225

Changes in the allowance for credit losses for the six months ended June 30, 2018 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	328,599			374,085			65,405			170,809			78,300		$	1,017,198
Provision for credit losses		18,480			(16,070	)		15,728			60,615			(753	)		78,000
Net charge-offs
Charge-offs		(29,481	)		(5,914	)		(8,320	)		(70,484	)		—			(114,199	)
Recoveries		11,232			1,660			3,310			22,047			—			38,249
Net charge-offs		(18,249	)		(4,254	)		(5,010	)		(48,437	)		—			(75,950	)
Ending balance	$	328,830			353,761			76,123			182,987			77,547		$	1,019,248

- 13 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Loans and leases and the allowance for credit losses, continued

Changes in the allowance for credit losses for the six months ended June 30, 2017 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(In thousands)
Beginning balance	$	330,833			362,719			61,127			156,288			78,030	$	988,997
Provision for credit losses		42,191			8,900			12,800			43,022			87		107,000
Net charge-offs
Charge-offs		(41,604	)		(7,298	)		(12,158	)		(63,186	)		—		(124,246	)
Recoveries		7,894			1,908			4,237			22,435			—		36,474
Net charge-offs		(33,710	)		(5,390	)		(7,921	)		(40,751	)		—		(87,772	)
Ending balance	$	339,314			366,229			66,006			158,559			78,117	$	1,008,225

Despite the allocation in the preceding tables, the allowance for credit losses is general in nature and is available to absorb losses from any loan or lease type.

In establishing the allowance for credit losses, the Company estimates losses attributable to specific troubled credits identified through both normal and targeted credit review processes and also estimates losses inherent in other loans and leases on a collective basis. For purposes of determining the level of the allowance for credit losses, the Company evaluates its loan and lease portfolio by loan type. The amounts of loss components in the Company’s loan and lease portfolios are determined through a loan-by-loan analysis of larger balance commercial loans and commercial real estate loans that are in nonaccrual status and by applying loss factors to groups of loan balances based on loan type and management’s classification of such loans under the Company’s loan grading system. Measurement of the specific loss components is typically based on expected future cash flows, collateral values and other factors that may impact the borrower’s ability to pay. In determining the allowance for credit losses, the Company utilizes a loan grading system which is applied to commercial and commercial real estate credits on an individual loan basis. Loan grades are assigned loss component factors that reflect the Company’s loss estimate for each group of loans and leases. Factors considered in assigning loan grades and loss component factors include borrower-specific information related to expected future cash flows and operating results, collateral values, geographic location, financial condition and performance, payment status, and other information; levels of and trends in portfolio charge-offs and recoveries; levels of and trends in portfolio delinquencies and impaired loans; changes in the risk profile of specific portfolios; trends in volume and terms of loans; effects of changes in credit concentrations; and observed trends and practices in the banking industry.

- 14 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Loans and leases and the allowance for credit losses, continued

Information with respect to loans and leases that were considered impaired as of June 30, 2018 and December 31, 2017 and for the three-month and six-month periods ended June 30, 2018 and 2017 follows.

	June 30, 2018						December 31, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
	(In thousands)
With an allowance recorded:
Commercial, financial, leasing, etc.	$	157,228		180,016		37,589		177,250		194,257		45,488
Real estate:
Commercial		85,588		96,221		9,316		67,199		75,084		9,140
Residential builder and developer		6,085		6,465		211		5,320		5,641		308
Other commercial construction		1,829		17,670		345		4,817		20,357		647
Residential		117,111		139,966		4,068		101,724		122,602		4,000
Residential — limited documentation		76,040		91,851		4,000		77,277		92,439		3,900
Consumer:
Home equity lines and loans		48,436		53,538		8,757		48,847		53,914		8,812
Automobile		12,467		15,396		2,595		13,498		15,737		2,811
Other		3,011		6,036		614		3,220		5,872		656
		507,795		607,159		67,495		499,152		585,903		75,762
With no related allowance recorded:
Commercial, financial, leasing, etc.		112,604		139,843		—		89,126		115,327		—
Real estate:
Commercial		89,024		99,658		—		138,356		149,716		—
Residential builder and developer		4,353		4,471		—		5,057		5,296		—
Other commercial construction		6,021		9,726		—		5,456		9,130		—
Residential		12,665		17,161		—		13,574		18,980		—
Residential — limited documentation		6,831		11,853		—		9,588		16,138		—
		231,498		282,712		—		261,157		314,587		—
Total:
Commercial, financial, leasing, etc.		269,832		319,859		37,589		266,376		309,584		45,488
Real estate:
Commercial		174,612		195,879		9,316		205,555		224,800		9,140
Residential builder and developer		10,438		10,936		211		10,377		10,937		308
Other commercial construction		7,850		27,396		345		10,273		29,487		647
Residential		129,776		157,127		4,068		115,298		141,582		4,000
Residential — limited documentation		82,871		103,704		4,000		86,865		108,577		3,900
Consumer:
Home equity lines and loans		48,436		53,538		8,757		48,847		53,914		8,812
Automobile		12,467		15,396		2,595		13,498		15,737		2,811
Other		3,011		6,036		614		3,220		5,872		656
Total	$	739,293		889,871		67,495		760,309		900,490		75,762

- 15 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Loans and leases and the allowance for credit losses, continued

	Three Months Ended June 30, 2018						Three Months Ended June 30, 2017
			Interest Income Recognized						Interest Income Recognized
	Average Recorded Investment		Total		Cash Basis		Average Recorded Investment		Total		Cash Basis
	(In thousands)
Commercial, financial, leasing, etc.	$	271,413		1,333		1,333		230,767		805		805
Real estate:
Commercial		168,224		3,811		3,811		200,005		813		813
Residential builder and developer		8,494		—		—		15,577		467		467
Other commercial construction		7,443		53		53		14,213		86		86
Residential		126,185		2,329		937		108,036		1,465		606
Residential — limited documentation		83,776		1,428		317		95,208		1,449		339
Consumer:
Home equity lines and loans		48,644		433		72		46,872		422		91
Automobile		12,636		225		14		15,506		262		21
Other		3,066		88		3		3,468		75		3
Total	$	729,881		9,700		6,540		729,652		5,844		3,231

	Six Months Ended June 30, 2018						Six Months Ended June 30, 2017
			Interest Income Recognized						Interest Income Recognized
	Average Recorded Investment		Total		Cash Basis		Average Recorded Investment		Total		Cash Basis
	(In thousands)
Commercial, financial, leasing, etc.	$	271,793		2,116		2,116		251,352		1,283		1,283
Real estate:
Commercial		175,035		6,958		6,958		191,935		1,788		1,788
Residential builder and developer		9,167		1,682		1,682		17,552		896		896
Other commercial construction		8,773		59		59		14,922		933		933
Residential		123,697		4,231		1,839		106,166		3,101		1,380
Residential — limited documentation		84,686		3,156		1,013		96,033		2,949		723
Consumer:
Home equity lines and loans		48,721		847		158		46,327		821		191
Automobile		12,881		449		29		15,931		537		40
Other		3,092		173		6		3,510		147		6
Total	$	737,845		19,671		13,860		743,728		12,455		7,240

Commercial loans and commercial real estate loans with a lower expectation of default are assigned one of ten possible “pass” loan grades and are generally ascribed lower loss factors when determining the allowance for credit losses. Loans with an elevated level of credit risk are classified as “criticized” and are ascribed a higher loss factor when determining the allowance for credit losses. Criticized loans may be classified as “nonaccrual” if the Company no longer expects to collect all amounts according to the contractual terms of the loan agreement or the loan is delinquent 90 days or more. Furthermore, criticized nonaccrual commercial loans and commercial real estate loans are considered impaired and, as a result, specific loss allowances on such loans are established within the allowance for credit losses to the extent appropriate in each individual instance.

- 16 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Loans and leases and the allowance for credit losses, continued

The following table summarizes the loan grades applied to the various classes of the Company’s commercial loans and commercial real estate loans.

			Real Estate
	Commercial,				Residential		Other
	Financial,				Builder and		Commercial
	Leasing, etc.		Commercial		Developer		Construction
	(In thousands)
June 30, 2018
Pass	$	20,769,679		24,954,015		1,503,766		6,594,613
Criticized accrual		880,147		636,070		134,242		148,744
Criticized nonaccrual		245,031		153,552		5,212		7,723
Total	$	21,894,857		25,743,637		1,643,220		6,751,080
December 31, 2017
Pass	$	20,490,486		24,380,184		1,485,148		6,270,812
Criticized accrual		1,011,174		723,777		140,119		164,812
Criticized nonaccrual		240,991		184,982		6,451		10,088
Total	$	21,742,651		25,288,943		1,631,718		6,445,712

In determining the allowance for credit losses, residential real estate loans and consumer loans are generally evaluated collectively after considering such factors as payment performance and recent loss experience and trends, which are mainly driven by current collateral values in the market place as well as the amount of loan defaults. Loss rates on such loans are determined by reference to recent charge-off history and are evaluated (and adjusted if deemed appropriate) through consideration of other factors including near-term forecasted loss estimates developed by the Company’s credit department. In arriving at such forecasts, the Company considers the current estimated fair value of its collateral based on geographical adjustments for home price depreciation/appreciation and overall borrower repayment performance. With regard to collateral values, the realizability of such values by the Company contemplates repayment of any first lien position prior to recovering amounts on a second lien position. However, residential real estate loans and outstanding balances of home equity loans and lines of credit that are more than 150 days past due are generally evaluated for collectibility on a loan-by-loan basis giving consideration to estimated collateral values. The carrying value of residential real estate loans and home equity loans and lines of credit for which a partial charge-off has been recognized totaled $32 million and $25 million, respectively, at June 30, 2018 and $34 million and $25 million, respectively, at December 31, 2017. Residential real estate loans and home equity loans and lines of credit that were more than 150 days past due but did not require a partial charge-off because the net realizable value of the collateral exceeded the outstanding customer balance were $15 million and $30 million, respectively, at June 30, 2018 and $20 million and $32 million, respectively, at December 31, 2017.

The Company also measures additional losses for purchased impaired loans when it is probable that the Company will be unable to collect all cash flows expected at acquisition plus additional cash flows expected to be collected arising from changes in estimates after acquisition.  The determination of the allocated portion of the allowance for credit losses is very subjective.  Given that inherent subjectivity and potential imprecision involved in determining the allocated portion of the allowance for credit losses, the Company also provides an inherent unallocated portion of the allowance.  The unallocated portion of the allowance is intended to recognize probable losses that are not otherwise identifiable and includes management’s subjective determination of amounts necessary to provide for the possible use of imprecise estimates in determining the allocated portion of the allowance.  Therefore, the level of the unallocated portion of the allowance is primarily reflective of the inherent imprecision in the various calculations used in determining the allocated portion of the allowance for credit losses.  Other factors that could also lead to changes in the unallocated portion include the effects of expansion into new markets for which the Company does not have the same degree of familiarity and experience regarding portfolio performance in

- 17 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Loans and leases and the allowance for credit losses, continued

changing market conditions, the introduction of new loan and lease product types, and other risks associated with the Company’s loan portfolio that may not be specifically identifiable.

The allocation of the allowance for credit losses summarized on the basis of the Company’s impairment methodology was as follows:

	Commercial, Financial,		Real Estate
	Leasing, etc.		Commercial		Residential		Consumer		Total
	(In thousands)
June 30, 2018
Individually evaluated for impairment	$	37,589		9,872		8,068		11,966	$	67,495
Collectively evaluated for impairment		291,241		343,889		54,999		171,021		861,150
Purchased impaired		—		—		13,056		—		13,056
Allocated	$	328,830		353,761		76,123		182,987		941,701
Unallocated										77,547
Total									$	1,019,248
December 31, 2017
Individually evaluated for impairment	$	45,488		10,095		7,900		12,279	$	75,762
Collectively evaluated for impairment		283,111		363,990		47,645		158,530		853,276
Purchased impaired		—		—		9,860		—		9,860
Allocated	$	328,599		374,085		65,405		170,809		938,898
Unallocated										78,300
Total									$	1,017,198

The recorded investment in loans and leases summarized on the basis of the Company’s impairment methodology was as follows:

	Commercial, Financial,		Real Estate
	Leasing, etc.		Commercial		Residential		Consumer		Total
	(In thousands)
June 30, 2018
Individually evaluated for impairment	$	269,832		192,900		212,647		63,914	$	739,293
Collectively evaluated  for impairment		21,625,022		33,932,858		17,757,782		13,390,030		86,705,692
Purchased impaired		3		12,179		340,283		—		352,465
Total	$	21,894,857		34,137,937		18,310,712		13,453,944	$	87,797,450
December 31, 2017
Individually evaluated for impairment	$	266,376		226,205		202,163		65,565	$	760,309
Collectively evaluated for impairment		21,476,254		33,117,512		19,023,843		13,201,050		86,818,659
Purchased impaired		21		22,656		387,338		—		410,015
Total	$	21,742,651		33,366,373		19,613,344		13,266,615	$	87,988,983

During the normal course of business, the Company modifies loans to maximize recovery efforts.  If the borrower is experiencing financial difficulty and a concession is granted, the Company considers such modifications as troubled debt restructurings and classifies those loans as either nonaccrual loans or renegotiated loans.  The types of concessions that the Company grants typically include principal deferrals and interest rate concessions, but may also include other types of concessions.

- 18 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Loans and leases and the allowance for credit losses, continued

The table that follows summarizes the Company’s loan modification activities that were considered troubled debt restructurings for the three-month and six-month periods ended June 30, 2018 and 2017:

					Post-modification (a)
	Number		Pre- modification Recorded Investment		Principal Deferral		Interest Rate Reduction		Other		Combination of Concession Types		Total
Three Months Ended June 30, 2018	(Dollars in thousands)
Commercial, financial, leasing, etc.	47		$	41,390	$	9,673	$	29	$	6,111	$	25,021	$	40,834
Real estate:
Commercial		28		7,200		7,376		175		394		—		7,945
Residential		30		7,951		2,814		—		—		5,766		8,580
Residential — limited documentation		3		584		200		—		—		458		658
Consumer:
Home equity lines and loans		10		555		—		—		—		559		559
Automobile		19		333		321		—		—		12		333
Total		137	$	58,013	$	20,384	$	204	$	6,505	$	31,816	$	58,909
Three Months Ended June 30, 2017
Commercial, financial, leasing, etc.		63	$	65,613	$	8,172	$	—	$	5,556	$	35,232	$	48,960
Real estate:
Commercial		30		26,045		11,782		—		—		14,276		26,058
Other commercial construction		1		66		66		—		—		—		66
Residential		30		7,956		2,982		—		—		5,486		8,468
Residential — limited documentation		7		1,831		235		—		—		1,660		1,895
Consumer:
Home equity lines and loans		35		3,229		416		—		—		2,818		3,234
Automobile		22		428		380		—		—		48		428
Other		3		54		54		—		—		—		54
Total		191	$	105,222	$	24,087	$	—	$	5,556	$	59,520	$	89,163

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

3. Loans and leases and the allowance for credit losses, continued

					Post-modification (a)
Six Months Ended June 30, 2018	Number		Pre- modification Recorded Investment		Principal Deferral		Interest Rate Reduction		Other		Combination of Concession Types		Total
	(Dollars in thousands)
Commercial, financial, leasing, etc.		103	$	89,384	$	45,346	$	653	$	6,111	$	38,068	$	90,178
Real estate:
Commercial		48		13,980		13,200		175		394		927		14,696
Other commercial construction		1		752		746		—		—		—		746
Residential		77		20,587		9,759		—		—		12,668		22,427
Residential — limited documentation		5		879		467		—		—		576		1,043
Consumer:
Home equity lines and loans		24		1,903		4		—		—		1,907		1,911
Automobile		27		481		469		—		—		12		481
Other		2		49		49		—		—		—		49
Total		287	$	128,015	$	70,040	$	828	$	6,505	$	54,158	$	131,531
Six Months Ended June 30, 2017
Commercial, financial, leasing, etc.		113	$	77,534	$	12,561	$	—	$	6,362	$	37,960	$	56,883
Real estate:
Commercial		50		32,747		14,773		—		—		17,882		32,655
Residential builder and developer		3		12,291		—		—		—		10,879		10,879
Other commercial construction		2		168		168		—		—		—		168
Residential		71		17,336		8,575		—		—		9,841		18,416
Residential — limited documentation		13		3,209		235		—		—		3,185		3,420
Consumer:
Home equity lines and loans		60		5,731		579		—		491		4,666		5,736
Automobile		42		818		763		—		—		55		818
Other		5		80		80		—		—		—		80
Total		359	$	149,914	$	37,734	$	—	$	6,853	$	84,468	$	129,055

(a) Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.  The present value of interest rate concessions, discounted at the effective rate of the original loan, was not material.

Troubled debt restructurings are considered to be impaired loans and for purposes of establishing the allowance for credit losses are evaluated for impairment giving consideration to the impact of the modified loan terms on the present value of the loan’s expected cash flows.  Impairment of troubled debt restructurings that have subsequently defaulted may also be measured based on the loan’s observable market price or the fair value of collateral if the loan is collateral-dependent.  Charge-offs may also be recognized on troubled debt restructurings that have subsequently defaulted.  Loans that were modified as troubled debt restructurings during the twelve months ended June 30, 2018 and 2017 and for which there was a subsequent payment default during the six-month periods ended June 30, 2018 and 2017, respectively, were not material.

The amount of foreclosed residential real estate property held by the Company was $97 million and $108 million at June 30, 2018 and December 31, 2017, respectively.  There were $433 million and $497 million at June 30, 2018 and December 31, 2017, respectively, in loans secured by residential real estate that were in the process of foreclosure. Of all loans in the process of foreclosure at June 30, 2018, approximately 41% were classified as purchased impaired and 21% were government guaranteed.

- 20 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

4. Borrowings

During January 2018, M&T Bank, the principal subsidiary of M&T, issued $1.0 billion of senior notes that mature in January 2021 pursuant to a Bank Note Program, of which $650 million have a 2.625% fixed interest rate and $350 million have a variable rate paid quarterly at rates that are indexed to the three-month London Interbank Offered Rate (“LIBOR”).  In July 2018, M&T issued $750 million of senior notes that mature in July 2023, of which $500 million have a 3.55% fixed interest rate and $250 million have a variable rate paid quarterly at rates that are indexed to the three-month LIBOR.  

M&T had $521 million of fixed and variable rate junior subordinated deferrable interest debentures ("Junior Subordinated Debentures") outstanding at June 30, 2018 that are held by various trusts that were issued in connection with the issuance by those trusts of preferred capital securities ("Capital Securities") and common securities ("Common Securities").  The proceeds from the issuances of the Capital Securities and the Common Securities were used by the trusts to purchase the Junior Subordinated Debentures.  The Common Securities of each of those trusts are wholly owned by M&T and are the only class of each trust's securities possessing general voting powers.  The Capital Securities represent preferred undivided interests in the assets of the corresponding trust. Under the Federal Reserve Board’s risk-based capital guidelines, the securities are includable in M&T’s Tier 2 regulatory capital.

Holders of the Capital Securities receive preferential cumulative cash distributions unless M&T exercises its right to extend the payment of interest on the Junior Subordinated Debentures as allowed by the terms of each such debenture, in which case payment of distributions on the respective Capital Securities will be deferred for comparable periods. During an extended interest period, M&T may not pay dividends or distributions on, or repurchase, redeem or acquire any shares of its capital stock.  In general, the agreements governing the Capital Securities, in the aggregate, provide a full, irrevocable and unconditional guarantee by M&T of the payment of distributions on, the redemption of, and any liquidation distribution with respect to the Capital Securities. The obligations under such guarantee and the Capital Securities are subordinate and junior in right of payment to all senior indebtedness of M&T.

The Capital Securities will remain outstanding until the Junior Subordinated Debentures are repaid at maturity, are redeemed prior to maturity or are distributed in liquidation to the trusts. The Capital Securities are mandatorily redeemable in whole, but not in part, upon repayment at the stated maturity dates (ranging from 2027 to 2033) of the Junior Subordinated Debentures or the earlier redemption of the Junior Subordinated Debentures in whole upon the occurrence of one or more events set forth in the indentures relating to the Capital Securities, and in whole or in part at any time after an optional redemption prior to contractual maturity contemporaneously with the optional redemption of the related Junior Subordinated Debentures in whole or in part, subject to possible regulatory approval.

Also included in long-term borrowings are agreements to repurchase securities of $416 million and $422 million at June 30, 2018 and December 31, 2017, respectively.  The agreements reflect various repurchase dates through 2020, however, the contractual maturities of the underlying investment securities extend beyond such repurchase dates.  The agreements are subject to legally enforceable master netting arrangements, however, the Company has not offset any amounts related to these agreements in its consolidated financial statements.  The Company posted collateral consisting primarily of government guaranteed mortgage-backed securities of $433 million and $442 million at June 30, 2018 and December 31, 2017, respectively.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

5. Shareholders' equity

M&T is authorized to issue 1,000,000 shares of preferred stock with a $1.00 par value per share.  Preferred shares outstanding rank senior to common shares both as to dividends and liquidation preference, but have no general voting rights.

Issued and outstanding preferred stock of M&T as of June 30, 2018 and December 31, 2017 is presented below:

	Shares Issued and Outstanding		Carrying Value
	(Dollars in thousands)
Series A (a)
Fixed Rate Cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		230,000	$	230,000
Series C (a)
Fixed Rate Cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		151,500	$	151,500
Series E (b)
Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		350,000	$	350,000
Series F (c)
Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock,     $10,000 liquidation preference per share		50,000	$	500,000

(a) Dividends, if declared, are paid at 6.375%.  Warrants to purchase M&T common stock at $73.71 per share issued in connection with the Series A preferred stock expire on December 23, 2018 and totaled 202,782 at June 30, 2018.

(b) Dividends, if declared, are paid semi-annually at a rate of 6.45% through February 14, 2024 and thereafter will be paid quarterly at a rate of the three-month LIBOR plus 361 basis points.  The shares are redeemable in whole or in part on or after February 15, 2024.  Notwithstanding M&T’s option to redeem the shares, if an event occurs such that the shares no longer qualify as Tier 1 capital, M&T may redeem all of the shares within 90 days following that occurrence.

(c) Dividends, if declared, are paid semi-annually at a rate of 5.125% through October 31, 2026 and thereafter will be paid quarterly at a rate of the three-month LIBOR plus 352 basis points.  The shares are redeemable in whole or in part on or after November 1, 2026.  Notwithstanding M&T’s option to redeem the shares, if an event occurs such that the shares no longer qualify as Tier 1 capital, M&T may redeem all of the shares within 90 days following that occurrence.

In addition to the Series A warrants mentioned in (a) above, a warrant to purchase 95,580 shares of M&T common stock at $517.89 per share was outstanding at June 30, 2018.  The obligation under that warrant was assumed by M&T in an acquisition and expires on December 12, 2018.

- 22 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

6. Pension plans and other postretirement benefits

The Company provides defined benefit pension and other postretirement benefits (including health care and life insurance benefits) to qualified retired employees.  Net periodic defined benefit cost for defined benefit plans consisted of the following:

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended June 30
	2018			2017			2018			2017
	(In thousands)
Service cost	$	5,069			5,189			243		202
Interest cost on projected benefit obligation		18,548			19,943			589			778
Expected return on plan assets		(30,688	)		(27,062	)		—			—
Amortization of prior service cost (credit)		153			154			(1,189	)		(329	)
Amortization of net actuarial loss (gain)		10,796			7,831			(213	)		(469	)
Net periodic benefit cost	$	3,878			6,055			(570	)		182

	Pension Benefits						Other Postretirement Benefits
	Six Months Ended June 30
	2018			2017			2018			2017
	(In thousands)
Service cost	$	10,172			10,097			469			585
Interest cost on projected benefit obligation		37,353			39,634			1,146			1,858
Expected return on plan assets		(61,563	)		(54,262	)		—			—
Amortization of prior service cost (credit)		278			279			(2,364	)		(679	)
Amortization of net actuarial loss (gain)		21,896			14,631			(413	)		(494	)
Net periodic benefit cost	$	8,136			10,379			(1,162	)		1,270

Service cost is reflected in salaries and employee benefits expense. The other components of net periodic benefit cost are reflected in other costs of operations. Expenses incurred in connection with the Company's defined contribution pension and retirement savings plans totaled $17,194,000 and $17,623,000 for the three months ended June 30, 2018 and 2017, respectively, and $38,468,000 and $37,042,000 for the six months ended June 30, 2018 and 2017, respectively, and are included in salaries and employee benefits expense.

- 23 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

7. Earnings per common share

The computations of basic earnings per common share follow:

	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	493,160			381,053			845,770			729,980
Less: Preferred stock dividends (a)		(18,130	)		(18,237	)		(36,260	)		(36,474	)
Net income available to common equity		475,030			362,816			809,510			693,506
Less: Income attributable to unvested stock-based    compensation awards		(2,432	)		(2,158	)		(4,172	)		(4,298	)
Net income available to common shareholders	$	472,598			360,658			805,338			689,208
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation awards		145,571			153,770			147,510			154,612
Less: Unvested stock-based compensation awards		(746	)		(913	)		(764	)		(974	)
Weighted-average shares outstanding		144,825			152,857			146,746			153,638
Basic earnings per common share	$	3.26			2.36			5.49			4.49

 (a)Including impact of not as yet declared cumulative dividends.

The computations of diluted earnings per common share follow:

	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
	(In thousands, except per share)
Net income available to common equity	$	475,030			362,816			809,510			693,506
Less: Income attributable to unvested stock-based    compensation awards		(2,430	)		(2,154	)		(4,168	)		(4,289	)
Net income available to common shareholders	$	472,600			360,662			805,342			689,217
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards		145,571			153,770			147,510			154,612
Less: Unvested stock-based compensation awards		(746	)		(913	)		(764	)		(974	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		173			419			195			470
Adjusted weighted-average shares outstanding		144,998			153,276			146,941			154,108
Diluted earnings per common share	$	3.26			2.35			5.48			4.47

GAAP defines unvested share-based awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) as participating securities that shall be included in the computation of earnings per common share pursuant to the two-class method.  The Company has issued stock-based compensation awards in the form of restricted stock and restricted stock units which, in accordance with GAAP, are considered participating securities.

Stock-based compensation awards and warrants to purchase common stock of M&T representing 212,244 and 412,826 common shares during the three-month periods ended June 30, 2018 and 2017, respectively, and 224,844 and 402,367 common shares during the six-month periods ended June 30, 2018 and 2017, respectively, were not included in the computations of diluted earnings per common share because the effect on those periods would have been antidilutive.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

8. Comprehensive income

The following tables display the components of other comprehensive income (loss) and amounts reclassified from accumulated other comprehensive income (loss) to net income:

				Investment			Defined Benefit						Total Amount				Income
				Securities (a)			Plans			Other			Before Tax				Tax			Net
				(In thousands)
Balance — January 1, 2018				$	(59,957	)		(413,168	)		(20,165	)	$	(493,290	)			129,476		$	(363,814	)
Cumulative effect of change in accounting principle — equity     securities					(22,795	)		—			—			(22,795	)			5,942			(16,853	)
Other comprehensive income before reclassifications:
Unrealized holding gains (losses), net					(187,989	)		—			—			(187,989	)			49,414			(138,575	)
Foreign currency translation adjustment					—			—			(1,448	)		(1,448	)			304			(1,144	)
Unrealized losses on cash flow hedges					—			—			(21,065	)		(21,065	)			5,538			(15,527	)
Total other comprehensive income (loss) before    reclassifications					(187,989	)		—			(22,513	)		(210,502	)			55,256			(155,246	)
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease    net income:
Amortization of unrealized holding losses on    held-to-maturity (“HTM”) securities					1,590			—			—			1,590		(c)		(418	)		1,172
Gains realized in net income					(18	)		—			—			(18	)	(d)		4			(14	)
Accretion of net gain on terminated cash    flow hedges					—			—			(56	)		(56	)	(e)		15			(41	)
Net yield adjustment from cash flow    hedges currently in effect					—			—			3,469			3,469		(e)		(912	)		2,557
Amortization of prior service credit					—			(2,086	)		—			(2,086	)	(f)		549			(1,537	)
Amortization of actuarial losses					—			21,483			—			21,483		(f)		(5,648	)		15,835
Total other comprehensive income (loss)					(186,417	)		19,397			(19,100	)		(186,120	)			48,846			(137,274	)
Balance — June 30, 2018				$	(269,169	)		(393,771	)		(39,265	)	$	(702,205	)			184,264		$	(517,941	)
	Investment Securities						Defined Benefit						Total Amount				Income
	With OTTI (b)			All Other			Plans			Other			Before Tax				Tax			Net
	(In thousands)
Balance — January 1, 2017	$	46,725			(73,785	)		(449,917	)		(8,268	)	$	(485,245	)			190,609		$	(294,636	)
Other comprehensive income before reclassifications:
Unrealized holding gains (losses), net		(13,802	)		37,728			—			—			23,926				(9,404	)		14,522
Foreign currency translation adjustment		—			—			—			2,502			2,502				(876	)		1,626
Unrealized losses on cash flow hedges		—			—			—			(441	)		(441	)			174			(267	)
Total other comprehensive income (loss) before    reclassifications		(13,802	)		37,728			—			2,061			25,987				(10,106	)		15,881
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease    net income:
Amortization of unrealized holding losses on    HTM securities		—			1,721			—			—			1,721		(c)		(677	)		1,044
(Gains) losses realized in net income		(50	)		67			—			—			17		(d)		(7	)		10
Accretion of net gain on terminated cash    flow hedges		—			—			—			(78	)		(78	)	(e)		31			(47	)
Net yield adjustment from cash flow    hedges currently in effect		—			—			—			(1,094	)		(1,094	)	(e)		430			(664	)
Amortization of prior service credit		—			—			(400	)		—			(400	)	(f)		157			(243	)
Amortization of actuarial losses		—			—			14,137			—			14,137		(f)		(5,563	)		8,574
Total other comprehensive income (loss)		(13,852	)		39,516			13,737			889			40,290				(15,735	)		24,555
Balance — June 30, 2017	$	32,873			(34,269	)		(436,180	)		(7,379	)	$	(444,955	)			174,874		$	(270,081	)

(a) Beginning January 1, 2018, equity securities with readily determinable fair values are required to be measured at fair value with changes in fair value recognized in the income statement. All investment securities with an other-than-temporary impairment charge are within scope of the adopted accounting guidance and no longer require separate presentation.

(b) Other-than-temporary impairment

(c) Included in interest income

(d) Included in gain (loss) on bank investment securities

(e) Included in interest expense

(f) Included in other costs of operations

- 25 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

8. Comprehensive income, continued

Accumulated other comprehensive income (loss), net consisted of the following:

	Investment			Defined Benefit
	Securities			Plans			Other			Total
	(In thousands)
Balance — December 31, 2017	$	(44,150	)		(304,546	)		(15,118	)	$	(363,814	)
Cumulative effect of change in accounting principle — equity securities		(16,853	)		—			—			(16,853	)
Net gain (loss) during period		(137,417	)		14,298			(14,155	)		(137,274	)
Balance — June 30, 2018	$	(198,420	)		(290,248	)		(29,273	)	$	(517,941	)

9. Derivative financial instruments

As part of managing interest rate risk, the Company enters into interest rate swap agreements to modify the repricing characteristics of certain portions of the Company’s portfolios of earning assets and interest-bearing liabilities.  The Company designates interest rate swap agreements utilized in the management of interest rate risk as either fair value hedges or cash flow hedges.  Interest rate swap agreements are generally entered into with counterparties that meet established credit standards and most contain master netting, collateral and/or settlement provisions protecting the at-risk party. Based on adherence to the Company’s credit standards and the presence of the netting, collateral or settlement provisions, the Company believes that the credit risk inherent in these contracts was not significant as of June 30, 2018.

The net effect of interest rate swap agreements was to decrease net interest income by $5 million and $4 million for the three-month and six-month  periods ended June 30, 2018, respectively, compared with increases of $7 million and $11 million for the three-month and six-month periods ended June 30, 2017, respectively.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

9. Derivative financial instruments, continued

Information about interest rate swap agreements entered into for interest rate risk management purposes summarized by type of financial instrument the swap agreements were intended to hedge follows:

	Notional		Average		Weighted- Average Rate						Estimated Fair
	Amount		Maturity		Fixed			Variable			ValueGain(Loss)(a)
	(In thousands)		(In years)								(In thousands)
June 30, 2018
Fair value hedges:
Fixed rate long-term borrowings (b)	$	4,700,000		2.7		2.41	%		2.72	%	$	(185	)
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(c)		7,700,000		1.4		1.52	%		1.98	%		56
Total	$	12,400,000		1.9							$	(129	)
December 31, 2017
Fair value hedges:
Fixed rate long-term borrowings (b)	$	4,550,000		2.9		2.27	%		2.09	%	$	573
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(d)		4,850,000		2.0		1.52	%		1.36	%		66
Total	$	9,400,000		2.5							$	639

(a) Certain clearinghouse exchanges consider payments by counterparties for variation margin on derivative instruments to be settlements of those positions. The impact of such treatment at June 30, 2018 and December 31, 2017 was a reduction of the estimated fair value losses on interest rate swap agreements designated as fair value hedges of $96.1 million and $41.1 million, respectively, and on interest rate swap agreements designated as cash flow hedges of $33.9 million and $16.3 million, respectively.

(b) Under the terms of these agreements, the Company receives settlement amounts at a fixed rate and pays at a variable rate.

(c) Includes notional amount and terms of $4.85 billion of forward-starting interest rate swap agreements that will become effective in 2019 and 2020 upon maturity of a like amount of other swap agreements.

(d) Includes notional amount and terms of $2.0 billion of forward-starting interest rate swap agreements that will become effective in 2019 upon maturity of a like amount of other swap agreements.

The Company utilizes commitments to sell residential and commercial real estate loans to hedge the exposure to changes in the fair value of real estate loans held for sale.  Such commitments have generally been designated as fair value hedges. The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in fair value of certain commitments to originate real estate loans for sale.

Derivative financial instruments used for trading account purposes included interest rate contracts, foreign exchange and other option contracts, foreign exchange forward and spot contracts, and financial futures. Interest rate contracts entered into for trading account purposes had notional values of $40.3 billion and $29.9 billion at June 30, 2018 and December 31, 2017, respectively.  The notional amounts of foreign currency and other option and futures contracts entered into for trading account purposes aggregated $647 million and $530 million at June 30, 2018 and December 31, 2017, respectively.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

9. Derivative financial instruments, continued

Information about the fair values of derivative instruments in the Company’s consolidated balance sheet and consolidated statement of income follows:

	Asset Derivatives				Liability Derivatives
	Fair Value				Fair Value
	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
	(In thousands)
Derivatives designated and qualifying as hedging instruments
Interest rate swap agreements (a)	$	397	$	639	$	526	$	—
Commitments to sell real estate loans (a)		3,872		734		4,696		283
		4,269		1,373		5,222		283
Derivatives not designated and qualifying as hedging instruments
Mortgage-related commitments to originate real estate loans for sale (a)		11,801		8,797		1,050		494
Commitments to sell real estate loans (a)		3,917		2,526		2,211		1,019
Trading:
Interest rate contracts (b)		72,973		74,164		274,959		132,104
Foreign exchange and other option and futures contracts (b)		8,514		5,657		6,579		5,286
		97,205		91,144		284,799		138,903
Total derivatives	$	101,474	$	92,517	$	290,021	$	139,186

(a) Asset derivatives are reported in other assets and liability derivatives are reported in other liabilities.

(b) Asset derivatives are reported in trading account assets and liability derivatives are reported in other liabilities.  The impact of variation margin payments at June 30, 2018 and December 31, 2017 was a reduction of the estimated fair value of interest rate contracts in the trading account in an asset position of $272.2 million and $136.2 million, respectively, and in a liability position of $4.0 million and $12.2 million, respectively.

	Amount of Gain (Loss) Recognized
	Three Months Ended June 30, 2018					Three Months Ended June 30, 2017
	Derivative			Hedged Item		Derivative			Hedged Item
	(In thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	(13,357	)		13,884	$	(5,795	)		5,011
Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	(2,686	)			$	831
Foreign exchange and other option and futures contracts (b)		2,365					1,568
Total	$	(321	)			$	2,399

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

9. Derivative financial instruments, continued

	Amount of Gain (Loss) Recognized
	Six Months Ended June 30, 2018					Six Months Ended June 30, 2017
	Derivative			Hedged item		Derivative			Hedged item
	(In thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	(55,747	)		56,254	$	(9,914	)		9,023
Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	(4,291	)			$	2,781
Foreign exchange and other option and futures contracts (b)		4,996					3,404
Total	$	705				$	6,185

(a) Effective January 1, 2018, reported as an adjustment to interest expense. Prior to 2018, reported as other revenues from operations.  

(b) Reported as trading account and foreign exchange gains.

	Carrying Amount of the Hedged Item				Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount of the Hedged Item
	(In thousands)
	June 30,		December 31,		June 30,			December 31,
	2018		2017		2018			2017
Location in the Consolidated Balance Sheet of    the Hedged Items in Fair Value Hedges
Long-term debt	$	4,598,712	$	4,504,029	$	(96,387	)	$	(40,133	)

The amount of gain (loss) resulting from hedge ineffectiveness recognized in the consolidated statement of income associated with derivatives designated as cash flow hedges was not material during the three and six months ended June 30, 2018 and 2017.

The Company also has commitments to sell and commitments to originate residential and commercial real estate loans that are considered derivatives.  The Company designates certain of the commitments to sell real estate loans as fair value hedges of real estate loans held for sale.  The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in the fair value of certain commitments to originate real estate loans for sale.  As a result of these activities, net unrealized pre-tax gains related to hedged loans held for sale, commitments to originate loans for sale and commitments to sell loans were approximately $26 million and $16 million at June 30, 2018 and December 31, 2017, respectively.  Changes in unrealized gains and losses are included in mortgage banking revenues and, in general, are realized in subsequent periods as the related loans are sold and commitments satisfied.

The Company does not offset derivative asset and liability positions in its consolidated financial statements.  The Company’s exposure to credit risk by entering into derivative contracts is mitigated through master netting agreements and collateral posting or settlement requirements.  Master netting agreements covering interest rate and foreign exchange contracts with the same party include a right to set-off that becomes enforceable in the event of default, early termination or under other specific conditions.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

9. Derivative financial instruments, continued

The aggregate fair value of derivative financial instruments in a liability position and the net liability positions with counterparties, which are subject to enforceable master netting arrangements, was $5 million and $13 million at June 30, 2018 and December 31, 2017, respectively.  The Company was required to post collateral relating to those positions of $4 million and $12 million at June 30, 2018 and December 31, 2017, respectively.   Certain of the Company’s derivative financial instruments contain provisions that require the Company to maintain specific credit ratings from credit rating agencies to avoid higher collateral posting requirements.  If the Company’s debt rating were to fall below specified ratings, the counterparties of the derivative financial instruments could demand immediate incremental collateralization on those instruments in a net liability position.  The aggregate fair value of all derivative financial instruments with such credit risk-related contingent features in a net liability position on June 30, 2018 was not significant.  If the credit risk-related contingent features had been triggered on June 30, 2018, the Company would not have been required to post any additional collateral to counterparties.

The aggregate fair value of derivative financial instruments in an asset position and the net asset positions with counterparties, which are subject to enforceable master netting arrangements, was $36 million and $13 million at June 30, 2018 and December 31, 2017, respectively.   Counterparties posted collateral relating to those positions of $37 million and $12 million at June 30, 2018 and December 31, 2017, respectively.  Trading account interest rate swap agreements entered into with customers are subject to the Company’s credit risk standards and often contain collateral provisions.

In addition to the derivative contracts noted above, the Company clears certain derivative transactions through a clearinghouse, rather than directly with counterparties. Those transactions cleared through a clearinghouse require initial margin collateral and variation margin payments depending on the contracts being in a net asset or liability position. The amount of initial margin collateral posted by the Company was $54 million and $52 million at June 30, 2018 and December 31, 2017, respectively. The fair value asset and liability amounts of derivative contracts at June 30, 2018 have been reduced by variation margin payments treated as settlements of $272 million and $134 million, respectively.  Variation margin on derivative contracts not treated as settlements continues to represent collateral posted or received by the Company.

10. Variable interest entities and asset securitizations

The Company’s securitization activity has consisted of securitizing loans originated for sale into government issued or guaranteed mortgage-backed securities. The amounts of those securitizations during the six-month periods ended June 30, 2018 and June 30, 2017 are presented in the Company’s consolidated statement of cash flows. The Company has not recognized any losses as a result of having securitized assets.

As described in note 4, M&T has issued junior subordinated debentures payable to various trusts that have issued Capital Securities. M&T owns the common securities of those trust entities. The Company is not considered to be the primary beneficiary of those entities and, accordingly, the trusts are not included in the Company’s consolidated financial statements. At each of June 30, 2018 and December 31, 2017, the Company included the junior subordinated debentures as “long-term borrowings” in its consolidated balance sheet and recognized $23 million, in other assets for its “investment” in the common securities of the trusts that will be concomitantly repaid to M&T by the respective trust from the proceeds of M&T’s repayment of the junior subordinated debentures associated with preferred capital securities described in note 4.

The Company has invested as a limited partner in various partnerships that collectively had total assets of approximately $1.0 billion at each of June 30, 2018 and December 31, 2017. Those partnerships generally construct or acquire properties for which the investing partners are eligible to receive certain federal income tax credits in accordance with government guidelines. Such investments may also provide tax deductible losses to the partners. The partnership investments also assist the Company in achieving its community reinvestment initiatives. As a limited partner, there is no recourse to the Company by creditors of the partnerships. However, the tax credits

- 30 -

NOTES TO FINANCIAL STATEMENTS, CONTINUED

10. Variable interest entities and asset securitizations, continued

that result from the Company’s investments in such partnerships are generally subject to recapture should a partnership fail to comply with the respective government regulations. The Company’s maximum exposure to loss of its investments in such partnerships was $461 million, including $229 million of unfunded commitments, at June, 2018 and $420 million, including $201 million of unfunded commitments, at December 31, 2017.  Contingent commitments to provide additional capital contributions to these partnerships were not material at June 30, 2018. The Company has not provided financial or other support to the partnerships that was not contractually required.  Management currently estimates that no material losses are probable as a result of the Company’s involvement with such entities.  The Company, in its position as limited partner, does not direct the activities that most significantly impact the economic performance of the partnerships and, therefore, in accordance with the accounting provisions for variable interest entities, the partnership entities are not included in the Company’s consolidated financial statements.  The Company’s investment cost is amortized to income taxes in the consolidated statement of income as tax credits and other tax benefits resulting from deductible losses associated with the projects are received.  The Company amortized $13 million and $26 million of its investments in qualified affordable housing projects to income tax expense during the three-month and six-month periods ended June 30, 2018, respectively, and recognized $16 million and $32 million of tax credits and other tax benefits during each of those respective periods. Similarly, for the three-month and six-month periods ended June 30, 2017, the Company amortized $11 million and $24 million, respectively, of its investments in qualified affordable housing projects to income tax expense and recognized $15 million and $31 million of tax credits and other tax benefits during those respective periods.  

The Company serves as investment advisor for certain registered money-market funds.  The Company has no explicit arrangement to provide support to those funds, but may waive portions of its allowable management fees as a result of market conditions.

11. Fair value measurements

GAAP permits an entity to choose to measure eligible financial instruments and other items at fair value.  The Company has not made any fair value elections at June 30, 2018.

Pursuant to GAAP, fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A three-level hierarchy exists in GAAP for fair value measurements based upon the inputs to the valuation of an asset or liability.

• Level 1 — Valuation is based on quoted prices in active markets for identical assets and liabilities.

• Level 2 — Valuation is determined from quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar instruments in markets that are not active or by model-based techniques in which all significant inputs are observable in the market.

• Level 3 — Valuation is derived from model-based and other techniques in which at least one significant input is unobservable and which may be based on the Company's own estimates about the assumptions that market participants would use to value the asset or liability.

When available, the Company attempts to use quoted market prices in active markets to determine fair value and classifies such items as Level 1 or Level 2. If quoted market prices in active markets are not available, fair value is often determined using model-based techniques incorporating various assumptions including interest rates, prepayment speeds and credit losses. Assets and liabilities valued using model-based techniques are classified as either Level 2 or Level 3, depending on the lowest level classification of an input that is considered significant to the overall valuation. The following is a description of the valuation methodologies used for the Company's assets and liabilities that are measured on a recurring basis at estimated fair value.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

11. Fair value measurements, continued

Trading account assets and liabilities

Trading account assets and liabilities consist primarily of interest rate contracts and foreign exchange contracts with customers who require such services with offsetting positions with third parties to minimize the Company's risk with respect to such transactions. The Company generally determines the fair value of its derivative trading account assets and liabilities using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2.  Mutual funds held in connection with deferred compensation and other arrangements have been classified as Level 1 valuations. Valuations of investments in municipal and other bonds can generally be obtained through reference to quoted prices in less active markets for the same or similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2.

Investment securities available for sale and equity securities

The majority of the Company's available-for-sale investment securities have been valued by reference to prices for similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2. Certain investments in mutual funds and equity securities are actively traded and, therefore, have been classified as Level 1 valuations.

Real estate loans held for sale

The Company utilizes commitments to sell real estate loans to hedge the exposure to changes in fair value of real estate loans held for sale. The carrying value of hedged real estate loans held for sale includes changes in estimated fair value during the hedge period.  Typically, the Company attempts to hedge real estate loans held for sale from the date of close through the sale date.  The fair value of hedged real estate loans held for sale is generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans with similar characteristics and, accordingly, such loans have been classified as a Level 2 valuation.

Commitments to originate real estate loans for sale and commitments to sell real estate loans

The Company enters into various commitments to originate real estate loans for sale and commitments to sell real estate loans. Such commitments are considered to be derivative financial instruments and, therefore, are carried at estimated fair value on the consolidated balance sheet. The estimated fair values of such commitments were generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans to certain government-sponsored entities and other parties. The fair valuations of commitments to sell real estate loans generally result in a Level 2 classification. The estimated fair value of commitments to originate real estate loans for sale are adjusted to reflect the Company's anticipated commitment expirations. The estimated commitment expirations are considered significant unobservable inputs contributing to the Level 3 classification of commitments to originate real estate loans for sale.  Significant unobservable inputs used in the determination of estimated fair value of commitments to originate real estate loans for sale are included in the accompanying table of significant unobservable inputs to Level 3 measurements.

Interest rate swap agreements used for interest rate risk management

The Company utilizes interest rate swap agreements as part of the management of interest rate risk to modify the repricing characteristics of certain portions of its portfolios of earning assets and interest-bearing liabilities. The Company generally determines the fair value of its interest rate swap agreements using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2. The Company has considered counterparty credit risk in the valuation of its interest rate swap agreement assets and has considered its own credit risk in the valuation of its interest rate swap agreement liabilities.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

11. Fair value measurements, continued

The following tables present assets and liabilities at June 30, 2018 and December 31, 2017 measured at estimated fair value on a recurring basis:

	Fair Value Measurements		Level 1 (a)		Level 2 (a)		Level 3
	(In thousands)
June 30, 2018
Trading account assets	$	148,303	$	46,502	$	101,801	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		1,707,821		—		1,707,821		—
Obligations of states and political subdivisions		1,925		—		1,925		—
Mortgage-backed securities:
Government issued or guaranteed		7,817,299		—		7,817,299		—
Privately issued		24		—		—		24
Other debt securities		131,777		—		131,777		—
		9,658,846		—		9,658,822		24
Equity securities		86,482		65,748		20,734		—
Real estate loans held for sale		1,151,090		—		1,151,090		—
Other assets (b)		19,987		—		8,186		11,801
Total assets	$	11,064,708	$	112,250	$	10,940,633	$	11,825
Trading account liabilities	$	281,538	$	—	$	281,538	$	—
Other liabilities (b)		8,483		—		7,433		1,050
Total liabilities	$	290,021	$	—	$	288,971	$	1,050
December 31, 2017
Trading account assets	$	132,909	$	47,873	$	85,036	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		1,947,487		—		1,947,487		—
Obligations of states and political subdivisions		2,589		—		2,589		—
Mortgage-backed securities:
Government issued or guaranteed		8,716,392		—		8,716,392		—
Privately issued		28		—		—		28
Other debt securities		128,832		—		128,832		—
Equity securities		100,956		73,232		27,724		—
		10,896,284		73,232		10,823,024		28
Real estate loans held for sale		378,047		—		378,047		—
Other assets (b)		12,696		—		3,899		8,797
Total assets	$	11,419,936	$	121,105	$	11,290,006	$	8,825
Trading account liabilities	$	137,390	$	—	$	137,390	$	—
Other liabilities (b)		1,796		—		1,302		494
Total liabilities	$	139,186	$	—	$	138,692	$	494

(a) There were no significant transfers between Level 1 and Level 2 of the fair value hierarchy during the six months ended June 30, 2018 and the year ended December 31, 2017.                                        

(b) Comprised predominantly of interest rate swap agreements used for interest rate risk management (Level 2), commitments to sell real estate loans (Level 2) and commitments to originate real estate loans to be held for sale (Level 3).

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

11. Fair value measurements, continued

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2018 were as follows:

	Investment Securities Available for Sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance - March 31, 2018	$	27			8,760
Total gains (losses) realized/unrealized:
Included in earnings		—			20,277		(b)
Settlements		(3	)		—
Transfers out of Level 3 (a)		—			(18,286	)	(c)
Balance — June 30, 2018	$	24			10,751
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2018	$	—			10,686		(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2017 were as follows:

	Investment Securities Available for Sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance - March 31, 2017	$	41			16,202
Total gains (losses) realized/unrealized:
Included in earnings		—			19,571		(b)
Settlements		(6	)		—
Transfers out of Level 3 (a)		—			(23,348	)	(c)
Balance — June 30, 2017	$	35			12,425
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2017	$	—			10,892		(b)

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

11. Fair value measurements, continued

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2018 were as follows:

	Investment securities available for sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance — January 1, 2018	$	28			8,303
Total gains (losses) realized/unrealized:
Included in earnings		—			28,407		(b)
Settlements		(4	)		—
Transfers out of Level 3 (a)		—			(25,959	)	(c)
Balance — June 30, 2018	$	24			10,751
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2018	$	—			10,686		(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2017 were as follows:

	Investment securities available for sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance — January 1, 2017	$	44			7,325
Total gains (losses) realized/unrealized:
Included in earnings		—			43,511		(b)
Settlements		(9	)		—
Transfers out of Level 3 (a)		—			(38,411	)	(c)
Balance — June 30, 2017	$	35			12,425
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2017	$	—			12,372		(b)

(a) The Company’s policy for transfers between fair value levels is to recognize the transfer as of the actual date of the event or change in circumstances that caused the transfer.

(b) Reported as mortgage banking revenues in the consolidated statement of income and includes the fair value of commitment issuances and expirations.

(c) Transfers out of Level 3 consist of interest rate locks transferred to closed loans.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

11. Fair value measurements, continued

The Company is required, on a nonrecurring basis, to adjust the carrying value of certain assets or provide valuation allowances related to certain assets using fair value measurements.  The more significant of those assets follow.

Loans

Loans are generally not recorded at fair value on a recurring basis. Periodically, the Company records nonrecurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectible portions of those loans. Nonrecurring adjustments also include certain impairment amounts for collateral-dependent loans when establishing the allowance for credit losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated valuation amount does not necessarily represent the fair value of the loan. Real estate collateral is typically valued using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace and the related nonrecurring fair value measurement adjustments have generally been classified as Level 2, unless significant adjustments have been made to the valuation that are not readily observable by market participants. Non-real estate collateral supporting commercial loans generally consists of business assets such as receivables, inventory and equipment.  Fair value estimations are typically determined by discounting recorded values of those assets to reflect estimated net realizable value considering specific borrower facts and circumstances and the experience of credit personnel in their dealings with similar borrower collateral liquidations.  Such discounts were generally in the range of 15% to 90% at June 30, 2018.  As these discounts are not readily observable and are considered significant, the valuations have been classified as Level 3.  Automobile collateral is typically valued by reference to independent pricing sources based on recent sales transactions of similar vehicles, and the related nonrecurring fair value measurement adjustments have been classified as Level 2.  Collateral values for other consumer installment loans are generally estimated based on historical recovery rates for similar types of loans.  As these recovery rates are not readily observable by market participants, such valuation adjustments have been classified as Level 3.  Loans subject to nonrecurring fair value measurement were $206 million at June 30, 2018 ($119 million and $87 million of which were classified as Level 2 and Level 3, respectively), $210 million at December 31, 2017 ($145 million and $65 million of which were classified as Level 2 and Level 3, respectively) and $200 million at June 30, 2017 ($118 million and $82 million of which were classified as Level 2 and Level 3, respectively).  Changes in fair value recognized for partial charge-offs of loans and loan impairment reserves on loans held by the Company on June 30, 2018 were decreases of $21 million and $45 million for the three-month and six-month periods ended June 30, 2018, respectively. Changes in fair value recognized for partial charge-offs of loans and loan impairment reserves on loans held by the Company on June 30, 2017 were decreases of $21 million and $43 million for the three-month and six-month periods ended June 30, 2017, respectively.

Assets taken in foreclosure of defaulted loans

Assets taken in foreclosure of defaulted loans are primarily comprised of commercial and residential real property and are generally measured at the lower of cost or fair value less costs to sell.  The fair value of the real property is generally determined using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace, and the related nonrecurring fair value measurement adjustments have generally been classified as Level 2.  Assets taken in foreclosure of defaulted loans subject to nonrecurring fair value measurement were $30 million and $37 million at June 30, 2018 and 2017, respectively.  Changes in fair value recognized for those foreclosed assets held by the Company were not material during the three-month and six-month periods ended June 30, 2018 and 2017.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

11. Fair value measurements, continued

Significant unobservable inputs to Level 3 measurements

The following tables present quantitative information about significant unobservable inputs used in the fair value measurements for certain Level 3 assets and liabilities at June 30, 2018 and December 31, 2017:

	Fair Value		Valuation Technique	Unobservable Inputs/Assumptions		Range (Weighted- Average)
	(In thousands)
June 30, 2018
Recurring fair value measurements
Privately issued mortgage-backed    securities	$	24	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		10,751	Discounted cash flow	Commitment expirations		0%-90% (20%)
December 31, 2017
Recurring fair value measurements
Privately issued mortgage-backed    securities	$	28	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		8,303	Discounted cash flow	Commitment expirations		0%-78% (22%)

(a) Other Level 3 assets (liabilities) consist of commitments to originate real estate loans.

Sensitivity of fair value measurements to changes in unobservable inputs

An increase (decrease) in the estimate of expirations for commitments to originate real estate loans would generally result in a lower (higher) fair value measurement.  Estimated commitment expirations are derived considering loan type, changes in interest rates and remaining length of time until closing.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

11. Fair value measurements, continued

Disclosures of fair value of financial instruments

The carrying amounts and estimated fair value for financial instrument assets (liabilities) are presented in the following table:

	June 30, 2018
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
	(In thousands)
Financial assets:
Cash and cash equivalents	$	1,369,094			1,369,094			1,258,614		110,480			—
Interest-bearing deposits at banks		6,669,985			6,669,985			—		6,669,985			—
Trading account assets		148,303			148,303			46,502		101,801			—
Investment securities		13,283,002			13,204,236			65,748		13,027,717			110,771
Loans and leases:
Commercial loans and leases		21,894,857			21,465,594			—		—			21,465,594
Commercial real estate loans		34,137,937			33,579,305			—		868,392			32,710,913
Residential real estate loans		18,310,712			18,110,823			—		4,128,794			13,982,029
Consumer loans		13,453,944			13,257,759			—		—			13,257,759
Allowance for credit losses		(1,019,248	)		—			—		—			—
Loans and leases, net		86,778,202			86,413,481			—		4,997,186			81,416,295
Accrued interest receivable		333,549			333,549			—		333,549			—
Financial liabilities:
Noninterest-bearing deposits	$	(32,086,191	)		(32,086,191	)		—		(32,086,191	)		—
Savings and interest-checking deposits		(51,107,290	)		(51,107,290	)		—		(51,107,290	)		—
Time deposits		(5,817,680	)		(5,865,067	)		—		(5,865,067	)		—
Deposits at Cayman Islands office		(261,427	)		(261,427	)		—		(261,427	)		—
Short-term borrowings		(3,239,416	)		(3,239,416	)		—		(3,239,416	)		—
Long-term borrowings		(8,382,316	)		(8,392,684	)		—		(8,392,684	)		—
Accrued interest payable		(87,779	)		(87,779	)		—		(87,779	)		—
Trading account liabilities		(281,538	)		(281,538	)		—		(281,538	)		—
Other financial instruments:
Commitments to originate real estate loans for sale	$	10,751			10,751			—		—			10,751
Commitments to sell real estate loans		882			882			—		882			—
Other credit-related commitments		(127,898	)		(127,898	)		—		—			(127,898	)
Interest rate swap agreements used for interest    rate risk management		(129	)		(129	)		—		(129	)		—

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

11. Fair value measurements, continued

	December 31, 2017
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
				(In thousands)
Financial assets:
Cash and cash equivalents	$	1,420,888			1,420,888			1,352,035		68,853		—
Interest-bearing deposits at banks		5,078,903			5,078,903			—		5,078,903		—
Trading account assets		132,909			132,909			47,873		85,036		—
Investment securities		14,664,525			14,653,074			73,232		14,469,127			110,715
Loans and leases:
Commercial loans and leases		21,742,651			21,321,282		—		—				21,321,282
Commercial real estate loans		33,366,373			32,950,724		—			22,130			32,928,594
Residential real estate loans		19,613,344			19,596,826		—			4,440,645			15,156,181
Consumer loans		13,266,615			13,161,517		—			—			13,161,517
Allowance for credit losses		(1,017,198	)		—		—			—			—
Loans and leases, net		86,971,785			87,030,349		—			4,462,775			82,567,574
Accrued interest receivable		327,170			327,170		—			327,170			—
Financial liabilities:
Noninterest-bearing deposits	$	(33,975,180	)		(33,975,180	)	—			(33,975,180	)	—
Savings and interest-checking deposits		(51,698,008	)		(51,698,008	)	—			(51,698,008	)	—
Time deposits		(6,580,962	)		(6,635,048	)	—			(6,635,048	)	—
Deposits at Cayman Islands office		(177,996	)		(177,996	)	—			(177,996	)	—
Short-term borrowings		(175,099	)		(175,099	)	—			(175,099	)	—
Long-term borrowings		(8,141,430	)		(8,193,783	)	—			(8,193,783	)	—
Accrued interest payable		(75,641	)		(75,641	)	—			(75,641	)	—
Trading account liabilities		(137,390	)		(137,390	)	—			(137,390	)	—
Other financial instruments:
Commitments to originate real estate loans for sale	$	8,303			8,303		—			—			8,303
Commitments to sell real estate loans		1,958			1,958		—			1,958		—
Other credit-related commitments		(125,281	)		(125,281	)	—			—			(125,281	)
Interest rate swap agreements used for interest    rate risk management		639			639		—			639		—

With the exception of marketable securities, certain off-balance sheet financial instruments and mortgage loans originated for sale, the Company’s financial instruments are not readily marketable and market prices do not exist. The Company, in attempting to comply with the provisions of GAAP that require disclosures of fair value of financial instruments, has not attempted to market its financial instruments to potential buyers, if any exist. Since negotiated prices in illiquid markets depend greatly upon the then present motivations of the buyer and seller, it is reasonable to assume that actual sales prices could vary widely from any estimate of fair value made without the benefit of negotiations. Additionally, changes in market interest rates can dramatically impact the value of financial instruments in a short period of time.

The Company does not believe that the estimated information presented herein is representative of the earnings power or value of the Company. The preceding analysis, which is inherently limited in depicting fair value, also does not consider any value associated with existing customer relationships nor the ability of the Company to create value through loan origination, deposit gathering or fee generating activities. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable between financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Furthermore, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Commitments and contingencies

In the normal course of business, various commitments and contingent liabilities are outstanding.  The following table presents the Company's significant commitments.  Certain of these commitments are not included in the Company's consolidated balance sheet.

	June 30,		December 31,
	2018		2017
	(In thousands)
Commitments to extend credit
Home equity lines of credit	$	5,474,798		5,482,622
Commercial real estate loans to be sold		323,750		194,763
Other commercial real estate		5,855,075		6,050,569
Residential real estate loans to be sold		361,034		347,113
Other residential real estate		240,020		201,426
Commercial and other		13,247,615		12,733,815
Standby letters of credit		2,410,569		2,497,844
Commercial letters of credit		55,655		46,739
Financial guarantees and indemnification contracts		3,458,625		3,434,381
Commitments to sell real estate loans		1,725,093		812,217

Commitments to extend credit are agreements to lend to customers, generally having fixed expiration dates or other termination clauses that may require payment of a fee.  Standby and commercial letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party.   Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party, whereas commercial letters of credit are issued to facilitate commerce and typically result in the commitment being funded when the underlying transaction is consummated between the customer and a third party.  The credit risk associated with commitments to extend credit and standby and commercial letters of credit is essentially the same as that involved with extending loans to customers and is subject to normal credit policies.  Collateral may be obtained based on management's assessment of the customer's creditworthiness.

Financial guarantees and indemnification contracts are oftentimes similar to standby letters of credit and include mandatory purchase agreements issued to ensure that customer obligations are fulfilled, recourse obligations associated with sold loans, and other guarantees of customer performance or compliance with designated rules and regulations.  Included in financial guarantees and indemnification contracts are loan principal amounts sold with recourse in conjunction with the Company's involvement in the Fannie Mae Delegated Underwriting and Servicing program.  The Company's maximum credit risk for recourse associated with loans sold under this program totaled approximately $3.3 billion at each of June 30, 2018 and December 31, 2017.

Since many loan commitments, standby letters of credit, and guarantees and indemnification contracts expire without being funded in whole or in part, the contract amounts are not necessarily indicative of future cash flows.

The Company utilizes commitments to sell real estate loans to hedge exposure to changes in the fair value of real estate loans held for sale.  Such commitments are considered derivatives and along with commitments to originate real estate loans to be held for sale are generally recorded in the consolidated balance sheet at estimated fair market value.

The Company also has commitments under long-term operating leases.

The Company is contractually obligated to repurchase previously sold residential real estate loans that do not ultimately meet investor sale criteria related to underwriting procedures or loan documentation.  When required to do so, the Company may reimburse loan purchasers for losses incurred or may repurchase certain loans.  The Company reduces residential mortgage banking revenues by an estimate for losses related to its obligations to loan purchasers.  

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

12. Commitments and contingencies, continued

The amount of those charges is based on the volume of loans sold, the level of reimbursement requests received from loan purchasers and estimates of losses that may be associated with previously sold loans. At June 30, 2018 the Company believes that its obligation to loan purchasers was not material to the Company’s consolidated financial position.

As previously disclosed, Wilmington Trust Corporation (“WTC”), a wholly-owned subsidiary of M&T, is the subject of a class action lawsuit alleging that WTC’s financial reporting and securities filings prior to its acquisition by M&T in 2011 were in violation of securities laws.  In April 2018, the parties reached an agreement in principle and a formal settlement agreement was executed and filed with the court later in the second quarter of 2018.  The proposed settlement was preliminarily approved by the court in July 2018.  The final settlement hearing is scheduled to occur in the fourth quarter of 2018.  In the first quarter of 2018, the Company increased its reserve for litigation matters by $135 million in anticipation of the settlement.  

M&T and its subsidiaries are subject in the normal course of business to various other pending and threatened legal proceedings and matters in which claims for monetary damages are asserted.  On an on-going basis management, after consultation with legal counsel, assesses the Company’s liabilities and contingencies in connection with such proceedings.  For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements.  To the extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not currently estimable.  Although not considered probable, the range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, was between $0 and $50 million.  Although the Company does not believe that the outcome of pending litigations will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

13. Segment information

Reportable segments have been determined based upon the Company's internal profitability reporting system, which is organized by strategic business unit.  Certain strategic business units have been combined for segment information reporting purposes where the nature of the products and services, the type of customer and the distribution of those products and services are similar.  The reportable segments are Business Banking, Commercial Banking, Commercial Real Estate, Discretionary Portfolio, Residential Mortgage Banking and Retail Banking.

The financial information of the Company's segments was compiled utilizing the accounting policies described in note 22 of Notes to Financial Statements in the 2017 Annual Report.  The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to GAAP.  As a result, the financial information of the reported segments is not necessarily comparable with similar information reported by other financial institutions.  Furthermore, changes in management structure or allocation methodologies and procedures may result in changes in reported segment financial data.  

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

13. Segment information, continued

Information about the Company's segments is presented in the following table:

	Three Months Ended June 30
	2018							2017
	Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)		Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)
	(In thousands)
Business Banking	$	136,029		912			43,007	$	124,982		1,006			28,750
Commercial Banking		269,499		928			126,391		277,116		843			105,627
Commercial Real Estate		205,541		385			112,691		197,298		357			87,271
Discretionary Portfolio		58,976		(10,554	)		29,113		72,044		(12,397	)		29,740
ResidentialMortgageBanking		82,167		16,047			15,402		88,700		18,144			13,742
Retail Banking		420,540		2,707			143,089		383,904		3,045			100,094
All Other		293,449		(10,425	)		23,467		254,972		(10,998	)		15,829
Total	$	1,466,201		—			493,160	$	1,399,016		—			381,053

	Six Months Ended June 30
	2018								2017
	Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)			Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)
	(In thousands)
Business Banking	$	263,913		1,830			80,725		$	245,315		1,917			53,738
Commercial Banking		535,895		1,778			251,856			551,024		1,763			218,414
Commercial Real Estate		408,148		725			220,994			392,423		764			171,818
Discretionary Portfolio		109,014		(21,386	)		48,852			150,990		(25,324	)		63,685
Residential Mortgage Banking		164,625		31,468			30,348			174,102		36,355			23,660
Retail Banking		814,016		5,572			266,469			752,422		6,092			186,285
All Other		604,803		(19,987	)		(53,474	)		493,845		(21,567	)		12,380
Total	$	2,900,414		—			845,770		$	2,760,121		—			729,980

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

13. Segment information, continued

	Average Total Assets
	Six Months Ended June 30				Year Ended December 31
	2018		2017		2017
	(In millions)
Business Banking	$	5,656		5,595		5,602
Commercial Banking		26,542		26,802		26,573
Commercial Real Estate		22,848		22,875		22,741
Discretionary Portfolio		33,277		38,341		37,203
Residential Mortgage Banking		2,186		2,341		2,355
Retail Banking		13,403		12,337		12,702
All Other		13,109		13,574		13,684
Total	$	117,021		121,865		120,860

(a) Total revenues are comprised of net interest income and other income.  Net interest income is the difference between taxable-equivalent interest earned on assets and interest paid on liabilities owed by a segment and a funding charge (credit) based on the Company's internal funds transfer and allocation methodology.  Segments are charged a cost to fund any assets (e.g. loans) and are paid a funding credit for any funds provided (e.g. deposits).  The taxable-equivalent adjustment aggregated $5,397,000 and $8,736,000 for the three-month periods ended June 30, 2018 and 2017, respectively, and $10,206,000 and $16,735,000 for the six-month periods ended June 30, 2018 and 2017, respectively, and is eliminated in "All Other" total revenues.  Intersegment revenues are included in total revenues of the reportable segments.  The elimination of intersegment revenues is included in the determination of "All Other" total revenues.

14. Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

M&T holds a 20% minority interest in Bayview Lending Group LLC ("BLG"), a privately-held commercial mortgage company. M&T recognizes income or loss from BLG using the equity method of accounting.  That investment had no remaining carrying value at June 30, 2018 as a result of cumulative losses recognized and cash distributions received.  Income recognized by M&T is included in other revenues from operations and was not significant during the three-month periods ended June 30, 2018 and 2017 or the six-month period ended June 30, 2017. Income recognized during the six months ended June 30, 2018 totaled $23 million.

Bayview Financial Holdings, L.P. (together with its affiliates, "Bayview Financial"), a privately-held specialty mortgage finance company, is BLG's majority investor.  In addition to their common investment in BLG, the Company and Bayview Financial conduct other business activities with each other.  The Company has obtained loan servicing rights for mortgage loans from BLG and Bayview Financial having outstanding principal balances of $2.8 billion and $3.0 billion at June 30, 2018 and December 31, 2017, respectively. Revenues from those servicing rights were $4 million for each of the three-month periods ended June 30, 2018 and 2017, and $7 million and $9 million for the six-month periods ended June 30, 2018 and 2017, respectively. The Company sub-services residential mortgage loans for Bayview Financial having outstanding principal balances of $53.5 billion and $56.6 billion at June 30, 2018 and December 31, 2017, respectively.  Revenues earned for sub-servicing loans for Bayview Financial were $28 million and $25 million for the three-month periods ended June 30, 2018 and 2017, respectively, and $58 million and $48 million for the six-month periods ended June 30, 2018 and 2017, respectively. In addition, the Company held $123 million and $136 million of mortgage-backed securities in its held-to-maturity portfolio at June 30, 2018 and December 31, 2017, respectively, that were securitized by Bayview Financial. At June 30, 2018, the Company held $90 million of Bayview Financial’s $750 million syndicated loan facility.  

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

15. Revenue from contracts with customers

Effective January 1, 2018 the Company adopted amended accounting and disclosure guidance for revenue from contracts with customers under the modified retrospective approach.  A significant amount of the Company’s revenues are derived from net interest income on financial assets and liabilities, mortgage banking revenues, trading account and foreign exchange gains, investment securities gains, loan and letter of credit fees, operating lease income, income from bank-owned life insurance, and certain other revenues that are generally excluded from the scope of the amended guidance.  As of result of the adoption, the Company began reporting credit card interchange revenue net of $3 million and $6 million of rewards in other revenue from operations for the three-month and six-month periods ended June 30, 2018, respectively.  For the three-month and six-month periods ended June 30, 2017, credit card rewards expense of $3 million and $5 million, respectively, was included in other costs of operations.  The adjustment to beginning retained earnings as well as the impact of any changes in timing of revenue recognition of noninterest income items within the scope of the guidance was not material to the Company’s consolidated financial position at December 31, 2017 or its consolidated results of operations for the six months ended June 30, 2018.  

For noninterest income revenue streams within the scope of the amended guidance, the Company recognizes the expected amount of consideration as revenue when the performance obligations related to the services under the terms of a contract are satisfied. The Company’s contracts generally do not contain terms that necessitate significant judgment to determine the amount of revenue to recognize.

The Company generally charges customer accounts or otherwise bills customers upon completion of its services.  Typically the Company’s contracts with customers have a duration of one year or less and payment for services is received at least annually, but oftentimes more frequently as services are provided.  At June 30, 2018, the Company had $53 million of uncollected amounts receivable related to recognized revenue from the sources in the table below.  Such amount is classified in accrued interest and other assets in the Company’s consolidated balance sheet.  In certain situations the Company is paid in advance of providing services and defers the recognition of revenue until its service obligation is satisfied.  At June 30, 2018, the Company had deferred revenue of $46 million related to the sources in the table below recorded in accrued interest and other liabilities on its consolidated balance sheet.  The following tables summarize sources of M&T’s noninterest income during 2018 that are subject to the amended guidance.

	Three Months Ended June 30, 2018
	Business Banking		Commercial Banking		Commercial Real Estate		Discretionary Portfolio		Residential Mortgage Banking		Retail Banking		All Other		Total
	(In thousands)
Classification in consolidated statement of    income
Service charges on deposit accounts	$	15,611		24,270		2,451		—		3		63,015		1,434	$	106,784
Trust income		—		—		—		—		—		—		137,641		137,641
Brokerage services income		—		—		—		—		—		—		12,629		12,629
Other revenues from operations:
Merchant discount and credit card fees		8,334		12,542		428		—		—		4,140		618		26,062
Other		—		3,646		2,215		413		927		9,613		7,598		24,412
	$	23,945		40,458		5,094		413		930		76,768		159,920	$	307,528

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

15. Revenue from contracts with customers, continued

	Six Months Ended June 30, 2018
	Business Banking		Commercial Banking		Commercial Real Estate		Discretionary Portfolio		Residential Mortgage Banking		Retail Banking		All Other		Total
	(In thousands)
Classification in consolidated statement of    income
Service charges on deposit accounts	$	31,015		48,924		5,215		—		6		123,616		3,123	$	211,899
Trust income		—		—		—		—		—		—		269,016		269,016
Brokerage services income		—		—		—		—		—		—		26,021		26,021
Other revenues from operations:
Merchant discount and credit card fees		15,837		25,254		982		—		—		7,528		1,233		50,834
Other		—		5,209		3,074		865		1,970		19,478		16,706		47,302
	$	46,852		79,387		9,271		865		1,976		150,622		316,099	$	605,072

Service charges on deposit accounts are generally deducted directly from customer account balances and include account maintenance charges as well as fees for insufficient funds, debit card usage, and other transactional services.  Account maintenance charges are generally recognized as revenue on a monthly basis, whereas transactional fees are recognized after M&T provides the respective service.

Trust income includes fees related to the Institutional Client Services (“ICS”) business and the Wealth Advisory Services (“WAS”) business.  Revenues from the ICS business are largely derived from a variety of trustee, agency,

investment, cash management and administrative services, whereas revenues from the WAS business are mainly derived from asset management, fiduciary services, and family office services.  Trust fees may be billed in arrears or in advance and are recognized as revenues as M&T’s performance obligations are satisfied.  Certain fees are based on a percentage of assets invested or under management and are recognized as the service is performed and constraints regarding the uncertainty of the amount of fees are resolved.

Brokerage service income includes revenues from the sale of mutual funds and annuities and securities brokerage fees.  Such revenues are generally recognized at the time of transaction execution.  Mutual fund and other distribution fees are recognized upon initial placement of customer funds as well as in future periods as such customers continue to hold amounts in those mutual funds.  

Other revenues from operations include merchant discount and credit card fees such as interchange fees and merchant discount fees that are generally recognized when the cardholder’s transaction is approved and settled.  Beginning in 2018, credit card rewards accrued to cardholders are recognized as a reduction of interchange revenue.  Also included in other revenues from operations are insurance commissions, ATM surcharge fees, and advisory fees.  Insurance commissions are recognized at the time the insurance policy is executed with the customer.  Insurance renewal commissions are recognized upon subsequent renewal of the policy.  ATM surcharge fees are included in revenue at the time of the respective ATM transaction.  Advisory fees are generally recognized at the conclusion of the advisory engagement when the Company has satisfied its service obligation.

16. Recent accounting developments

The following table provides a description of accounting standards that were adopted by the company in 2018 as well as standards that are not effective that could have an impact to M&T’s consolidated financial statements upon adoption.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

16. Recent accounting developments, continued

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Adopted in 2018
Revenue from Contracts with Customers	The core principle of the accounting guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.	January 1, 2018	As described in note 15 the Company adopted the revenue recognition guidance effective January 1, 2018 and applied the modified retrospective approach for reporting purposes.  The adjustment to beginning retained earnings as well as the impact of any changes in the timing of revenue recognition of noninterest income items within the scope of this guidance did not have a material effect on the Company’s financial position or results of operations.
Recognition and Measurement of Financial Assets and Financial Liabilities	The amended guidance requires equity investments (excluding those accounted for under the equity method of accounting or those that result in consolidation of the investee) be measured at fair value with changes in fair value recognized in net income, public entities to use the exit price when measuring the fair value of financial instruments for disclosure purposes, and an entity to present separately in other comprehensive income a change in the instrument-specific credit risk when the entity has elected to measure a liability at fair value in accordance with the fair value option.	January 1, 2018	At January 1, 2018 the Company reclassified marketable equity securities from investment securities available for sale.  Upon adoption $17 million of fair value changes in those equity securities, net of tax were reclassified from accumulated other comprehensive income to retained earnings.  See note 2 for information on amounts recognized in gain (loss) on bank investment securities in the consolidated statement of income.
Improvements to Accounting for  Hedging Activities	The amended guidance expands and clarifies hedge accounting for nonfinancial and financial risk components, aligns the recognition and presentation of the effects of the hedging instrument and hedged item in the financial statements, and simplifies the requirements for assessing effectiveness in a hedging relationship.	January 1, 2019 Early adoption permitted	The Company early adopted the amended guidance on January 1, 2018 and such adoption did not have a material impact on its consolidated financial statements.
Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	The amended guidance requires the service cost component of the net periodic pension cost and net periodic postretirement benefit cost to be reported in the same line item in the income statement as other compensation costs arising from services rendered by the pertinent employees during the period.  The amendments also require that the other components of net benefit costs be presented separately from the service cost component.	January 1, 2018	The Company adopted the new reporting requirements effective January 1, 2018.  The Company previously reported all of its net periodic pension and postretirement benefit costs in salaries and employee benefits within the consolidated statement of income.  Information about net periodic pension and postretirement benefit costs that were not service cost-related is included in note 6.  The impact of adopting the amended guidance was not material.
Scope of Modification Accounting for Share-Based Payment Awards	The amended guidance addresses which changes to the terms and conditions of a share-based payment award require an entity to apply modification accounting.	January 1, 2018	The Company adopted the amended guidance on January 1, 2018.  The guidance is being applied on a prospective basis for awards modified on or after the adoption date.
Restricted Cash	The amended guidance requires that restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows.  In addition, when cash, cash equivalents, and restricted cash or restricted cash equivalents are presented in more than one line item within the statement of financial position, the line items and amounts must be presented on the face of the statement of cash flows or disclosed in the notes to the financial statements.  Information about the nature of restrictions on an entity’s cash and cash equivalents must also be disclosed.	January 1, 2018	The guidance was adopted on January 1, 2018 and did not have a material impact on the Company’s consolidated financial statements.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

16. Recent accounting developments, continued

	Standard	Description	Required date of adoption	Effect on consolidated financial statements
	Standards Adopted in 2018
	Classification of Certain Cash Receipts and Cash Payments	This amendment provides clarifying guidance for classifying cash inflows or outflows on the statement of cash flows where current guidance is unclear or silent.	January 1, 2018	The guidance was applied for  2018 reporting and did not have a material impact on the Company’s consolidated statement of cash flows.
	Clarifying the Definition of a Business	The amended guidance clarifies the definition of a business for purposes of evaluating whether transactions would be accounted for as acquisitions (or disposals) of assets or businesses.	January 1, 2018	The guidance was adopted January 1, 2018 and will be applied to future transactions. The Company does not expect the guidance to have a material impact on its consolidated financial statements.
Standards Not Yet Adopted as of June 30, 2018
	Leases	The new guidance requires lessees to record a right-of-use asset and a lease liability for all leases with a term greater than 12 months.  While the guidance requires all leases to be recognized in the balance sheet, there continues to be a differentiation between finance leases and operating leases for purposes of income statement recognition and cash flow statement presentation.  For finance leases, interest on the lease liability and amortization of the right-of-use asset will be recognized separately in the statement of income.  Repayments of principal on those lease liabilities will be classified within financing activities and payments of interest on the lease liability will be classified within operating activities in the statement of cash flows.  For operating leases, a single lease cost is recognized in the statement of income and allocated over the lease term, generally on a straight-line basis.  All cash payments are presented within operating activities in the statement of cash flows. The accounting applied by lessors is largely unchanged from existing GAAP, however, the guidance eliminates the accounting model for leveraged leases for leases that commence after the effective date of the guidance.	January 1, 2019 Early adoption permitted	The Company occupies certain banking offices and uses certain equipment under noncancelable operating lease agreements which currently are not reflected in its consolidated balance sheet.  Upon adoption of the guidance, the Company expects to report increased assets and increased liabilities as a result of recognizing right-of-use assets and lease liabilities on its consolidated balance sheet. The Company was committed to $429 million of minimum lease payments under noncancelable operating lease agreements at December 31, 2017.  The Company does not expect the new guidance will have a material impact to its consolidated statement of income.
	Premium Amortization on Purchased Callable Debt Securities	The amended guidance requires the premium on callable debt securities to be amortized to the earliest call date.  The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity.	January 1, 2019 Early adoption permitted	The amendments should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company does not expect the guidance to have a material impact on its consolidated financial statements.

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NOTES TO FINANCIAL STATEMENTS, CONTINUED

16. Recent accounting developments, continued

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Not Yet Adopted as of June 30, 2018
Measurement of Credit Losses on Financial Instruments	The amended guidance replaces the current incurred loss model for determining the allowance for credit losses. The guidance requires financial assets measured at amortized cost to be presented at the net amount expected to be collected.  The allowance for credit losses will represent a valuation account that is deducted from the amortized cost basis of the financial assets to present their net carrying value at the amount expected to be collected. The income statement will reflect the measurement of credit losses for newly recognized financial assets as well as expected increases or decreases of expected credit losses that have taken place during the period. When determining the allowance, expected credit losses over the contractual term of the financial asset(s) (taking into account prepayments) will be estimated considering relevant information about past events, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount.  The amended guidance also requires recording an allowance for credit losses for purchased financial assets with a more-than-insignificant amount of credit deterioration since origination.  The initial allowance for these assets will be added to the purchase price at acquisition rather than being reported as an expense.  Subsequent changes in the allowance will be recorded through the income statement as an expense adjustment.  In addition, the amended guidance requires credit losses relating to available-for-sale debt securities to be recorded through an allowance for credit losses. The calculation of credit losses for available-for-sale securities will be similar to how it is determined under existing guidance.	January 1, 2020 Early adoption permitted as of January 1, 2019	The Company is developing its approach for determining expected credit losses under the new guidance.  The Company expects that the new guidance will result in an increase in its allowance for credit losses as a result of considering credit losses over the expected life of its loan portfolios.  Increases in the level of allowances will reflect new requirements to include the nonaccretable principal difference on purchased credit impaired loans and estimated credit losses on investment securities classified as held-to-maturity, if any.  The expected increase to the allowance for credit losses and the impact to the Company’s financial statements are still being determined.
Simplifying the Test for Goodwill Impairment	The amended guidance eliminates step 2 from the goodwill impairment test.	January 1, 2020 Early adoption permitted	The amendments should be applied using a prospective transition method. The Company does not expect the guidance will have a material impact on its consolidated financial statements, unless at some point in the future one of its reporting units were to fail step 1 of the goodwill impairment test.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Overview

M&T Bank Corporation (“M&T”) recorded net income in the second quarter of 2018 of $493 million or $3.26 of diluted earnings per common share, compared with $381 million or $2.35 of diluted earnings per common share in the year-earlier quarter.  During the first quarter of 2018, net income and diluted earnings per common share were $353 million and $2.23, respectively.  Basic earnings per common share were $3.26 in the recent quarter, compared with $2.36 in the second quarter of 2017 and $2.24 in the initial 2018 quarter.  Net income totaled $846 million or $5.48 of diluted earnings per common share for the six months ended June 30, 2018, compared with $730 million or $4.47 of diluted earnings per common share in the first six months of 2017.  Basic earnings per common share were $5.49 in the first half of 2018, up from $4.49 in the similar 2017 period.

The annualized rate of return on average total assets for M&T and its consolidated subsidiaries (“the Company”) in the second quarter of 2018 was 1.70%, compared with 1.27% in the year-earlier quarter and 1.22% in the first quarter of 2018.  The annualized rate of return on average common shareholders’ equity was 13.32% in the recent quarter, compared with 9.67% in the corresponding 2017 quarter and 9.15% in the initial quarter of 2018.  During the six-month period ended June 30, 2018, the annualized rates of return on average assets and average common shareholders’ equity were 1.46% and 11.21%, respectively, compared with 1.21% and 9.28%, respectively, in the first six months of 2017.

As of March 31, 2018, the Company increased its reserve for litigation matters by $135 million in anticipation of the settlement of a Wilmington Trust Corporation civil litigation matter that was preliminarily approved by the court in July 2018.  The increase, on an after-tax basis, reduced net income by $102 million in that quarter, or $.68 of diluted earnings per common share.  Additional information about litigation matters is included in note 12 of Notes to Financial Statements and Part II, Item 1 of this Form 10-Q.  In addition, income tax expense in the first two quarters of 2018 reflects the reduction of the corporate Federal income tax rate from 35% to 21% by the Tax Cuts and Jobs Act (‘the Tax Act”) that was enacted on December 22, 2017.  Finally, the Company adopted amended accounting guidance in the first quarter of 2018 to separately report equity securities at fair value on the consolidated balance sheet (which were previously reported as investment securities available for sale) with changes in fair value recognized in the consolidated statement of income rather than through other comprehensive income.  Net unrealized gains on investments in equity securities in the second quarter of 2018 were $2 million, compared with net unrealized losses of $9 million in the initial 2018 quarter.

On June 28, 2018, M&T announced that the Federal Reserve did not object to M&T’s revised 2018 Capital Plan.  That capital plan includes the repurchase of up to $1.8 billion of common shares during the four-quarter period starting on July 1, 2018 and an increase in the quarterly common stock dividend in the third quarter of 2018 of up to $.20 per share to $1.00 per share.  M&T may continue to pay dividends and interest on equity and debt instruments included in regulatory capital, including preferred stock, trust preferred securities and subordinated debt that were outstanding at December 31, 2017, consistent with the contractual terms of those instruments.  Dividends are subject to declaration by M&T’s Board of Directors.  In July 2018, M&T’s Board of Directors authorized a new stock repurchase program to repurchase up to $1.8 billion of shares of M&T’s common stock subject to all applicable regulatory limitations, including those set forth in M&T’s revised 2018 Capital Plan.  During the second quarter of 2018, M&T repurchased 2,608,376 shares of its common stock at a total cost of $475 million and increased the quarterly common stock dividend from $.75 to $.80 per share.  In the first quarter of 2018, M&T repurchased 3,783,282 shares of its common stock at a total cost of $721 million.  During the first and second quarters of 2017 M&T repurchased 3,233,196 and 1,409,807 shares of its common stock, respectively, at a total cost of $532 million and $225 million, respectively.

Supplemental Reporting of Non-GAAP Results of Operations

M&T consistently provides supplemental reporting of its results on a “net operating” or “tangible” basis, from which M&T excludes the after-tax effect of amortization of core deposit and other intangible assets (and the related

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goodwill, core deposit intangible and other intangible asset balances, net of applicable deferred tax amounts) and expenses associated with merging acquired operations into the Company, since such items are considered by management to be “nonoperating” in nature.  Although “net operating income” as defined by M&T is not a GAAP measure, M&T’s management believes that this information helps investors understand the effect of acquisition activity in reported results.

Net operating income totaled $498 million in the second quarter of 2018, compared with $386 in the similar quarter of 2017 and $357 million in the initial quarter of 2018.  Diluted net operating earnings per common share for the recent quarter were $3.29, compared with $2.38 in the second quarter of 2017 and $2.26 in the first quarter of 2018. For the first six months of 2018, net operating income and diluted net operating earnings per common share were $855 million and $5.54, respectively, compared with $740 million and $4.53, respectively, for the first half of 2017.

Net operating income in the recent quarter expressed as an annualized rate of return on average tangible assets was 1.79%, compared with 1.33% in the second quarter of 2017 and 1.28% in the initial 2018 quarter. Net operating income represented an annualized return on average tangible common equity of 19.91% in the second quarter of 2018, compared with 14.18% and 13.51% for the quarters ended June 30, 2017 and March 31, 2018, respectively.  For the first six months of 2018, net operating income represented an annualized return on average tangible assets and average tangible common shareholders’ equity of 1.53% and 16.65%, respectively, compared with 1.27% and 13.61%, respectively, in the year-earlier period.

Reconciliations of GAAP amounts with corresponding non-GAAP amounts are provided in table 2.

Taxable-equivalent Net Interest Income

Net interest income expressed on a taxable-equivalent basis was $1.01 billion in the second quarter of 2018, up $67 million or 7% from $947 million in the corresponding quarter of 2017.  That growth resulted predominantly from a widening of the net interest margin, or taxable-equivalent net interest income expressed as an annualized percentage of average earning assets, to 3.83% in the recent quarter from 3.45% in the second quarter of 2017.  The rise in taxable-equivalent net interest income was largely the result of the higher interest rate environment due to actions initiated by the Federal Reserve in March, June and December 2017 and in March and June 2018 to raise its target Federal funds rate by .25% in each of those months.  The expansion of the net interest margin was partially offset by a decline in average earning assets of $3.8 billion, including decreases in average loan and lease balances of $1.9 billion and investment securities of $2.1 billion. Taxable-equivalent net interest income in the recent quarter increased $34 million or 3% from the first quarter of 2018.  A 12 basis point (hundredths of one percent) widening of the net interest margin from 3.71% in the first quarter of 2018 was partially offset by lower average earning assets of $1.0 billion, resulting from decreases in average balances of investment securities of $611 million and loans of $360 million.  The widening of the net interest margin largely reflected the impact of the three most recent interest rate actions initiated by the Federal Reserve.

For the first six months of 2018, taxable-equivalent net interest income was $1.99 billion, up 7% from $1.87 billion in the similar period of 2017.  That increase was primarily attributable to a 37 basis point widening of the net interest margin to 3.77% in the 2018 period from 3.40% in the comparable period of 2017 offset, in part, by lower average loans and investment securities.

Average loans and leases were $87.4 billion in the recent quarter, 2% lower than $89.3 billion in the second quarter of 2017.  Commercial loans and leases averaged $21.7 billion in the second 2018 quarter, $640 million or 3% lower than $22.3 billion in the year-earlier quarter.  Average commercial real estate loans aggregated $33.7 billion in the recent quarter, up $473 million, or 1%, from $33.2 billion in the second quarter of 2017.  Included in average commercial real estate loans in the second quarters of 2018 and 2017 were loans held for sale of $222 million and $109 million, respectively.  Reflecting ongoing repayments of loans obtained in the 2015 acquisition of Hudson City Bancorp, Inc. (“Hudson City”), average residential real estate loans declined $2.7 billion or 13% to $18.6 billion in the second quarter of 2018 from $21.3 billion in the year-earlier quarter.  Included in that portfolio were loans held

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for sale, which averaged $285 million in the recent quarter and $291 million in the second quarter of 2017.  Consumer loans averaged $13.4 billion in the second 2018 quarter, up $980 million, or 8%, from $12.4 billion in the similar quarter of 2017, predominantly due to growth in average recreational vehicle and automobile loans that was partially offset by declines in outstanding balances of home equity loans and lines of credit.

Average loan and lease balances in the second quarter of 2018 decreased $360 million, or less than 1%, from $87.8 billion in the first quarter of 2018.  Average commercial loan and lease balances in the second quarter of 2018 increased $163 million, or 1%, from $21.5 billion in the first quarter of 2018.  Average commercial real estate loans were little changed in the recent quarter as compared with the intial 2018 quarter.  Commercial real estate loans held for sale averaged $120 million in the first quarter of 2018.  Average balances of residential real estate loans in the second quarter of 2018 declined $630 million, or 3%, from $19.3 billion in the first quarter of 2018, reflecting the continued pay down of loans obtained in the acquisition of Hudson City.  Average consumer loans in the recent quarter increased $72 million, or 1%, from $13.3 billion in 2018’s initial quarter.  The accompanying table summarizes quarterly changes in the major components of the loan and lease portfolio.

AVERAGE LOANS AND LEASES

(net of unearned discount)

			Percent Increase
			(Decrease) from
	2nd Qtr.		2ndQtr.				1st Qtr.
	2018		2017				2018
	(In millions)
Commercial, financial, etc.	$	21,709		(3	)	%		1		%
Real estate – commercial		33,687		1				—
Real estate – consumer		18,644		(13	)			(3	)
Consumer
Automobile		3,540		11				(1	)
Home equity lines and loans		5,092		(7	)			(2	)
Other		4,734		27				5
Total consumer		13,366		8				1
Total	$	87,406		(2	)	%		—		%

For the first six months of 2018, average loans and leases totaled $87.6 billion, down $1.9 billion, or 2%, from $89.5 billion in the first half of 2017.  Contributing to that decrease were declines in residential real estate loans of $2.8 billion, or 13%, and commercial loans and leases of $691 million, or 3%, partially offset by a rise in consumer loans of $1.1 billion, or 9%, and commercial real estate loans of $475 million, or 1%.  The lower average balances of residential real estate loans reflect the pay down of loans obtained in the Hudson City acquisition, while the decreased commercial loan and lease balances reflect pay downs of outstanding balances.  The rise in average consumer loans resulted from higher recreational vehicle and automobile loans, partially offset by lower outstanding balances of home equity lines of credit.

The investment securities portfolio averaged $13.9 billion in the second quarter of 2018, down $2.0 billion, or 13%, from $15.9 billion in the year-earlier quarter and $611 million lower than the $14.5 billion averaged in the first quarter of 2018.  For the first six months of 2018 and 2017, investment securities averaged $14.2 billion and $16.0 billion, respectively.  The lower average balances in the recent periods reflect maturities and pay downs of mortgage-backed securities.  There were no significant purchases or sales of investment securities in the first half of 2018.  Given the shape of the long-term portion of the yield curve, the Company has not re-invested those proceeds in longer-term mortgage-backed and other securities.  During the second quarter of 2017, the Company purchased $658 million of mortgage-backed securities, predominantly Ginnie Mae securities, and $214 million of U.S. Treasury notes.  Also during that quarter, the Company sold $512 million of available-for-sale Fannie Mae and Freddie Mac mortgage-backed securities largely due to the limitations on the amount of Fannie Mae and Freddie Mac mortgage-

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backed securities that are permitted to be included in the highest tier of “high quality liquid assets” for the Liquidity Coverage Ratio (“LCR”) calculation.  The Company purchased mortgage-backed securities and U.S. Treasury notes totaling $536 million during the initial 2017 quarter.

As noted earlier, effective January 1, 2018 amended accounting guidance was adopted that requires that fair value changes in equity securities with readily determinable fair values be recognized in the consolidated statement of income as opposed to accumulated other comprehensive income where they had been recognized under previous accounting guidance.  Net unrealized gains on such equity securities during the second quarter of 2018 were $2 million, compared with net unrealized losses of $9 million during the initial 2018 quarter.  Those gains and losses were predominantly related to the Company’s holdings of Fannie Mae and Freddie Mac preferred stock.

The investment securities portfolio is largely comprised of residential mortgage-backed securities and shorter-term U.S. Treasury and federal agency notes.  When purchasing investment securities, the Company considers its liquidity position and its overall interest-rate risk profile as well as the adequacy of expected returns relative to risks assumed, including prepayments.  The Company manages its investment securities portfolio, in part, to satisfy the LCR requirements established by regulators.  The LCR is intended to ensure that banks hold a sufficient amount of “high quality liquid assets” to cover the anticipated net cash outflows during a hypothetical acute 30-day stress scenario. For additional information concerning the LCR rules, refer to Part I, Item 1 of M&T’s Form 10-K for the year ended December 31, 2017 under the heading “Liquidity.”

The Company may occasionally sell investment securities as a result of changes in interest rates and spreads, actual or anticipated prepayments, credit risk associated with a particular security, or as a result of restructuring its investment securities portfolio in connection with a business combination.  The Company regularly reviews its investment securities for declines in value below amortized cost that might be characterized as “other than temporary.” There were no other-than-temporary impairment charges recognized in either of the six-month periods ended June 30, 2018 or 2017. Additional information about the investment securities portfolio is included in notes 2 and 11 of Notes to Financial Statements.

Other earning assets include interest-bearing deposits at the Federal Reserve Bank of New York and other banks, trading account assets and federal funds sold.  Those other earning assets in the aggregate averaged $4.9 billion in the recently completed quarter, compared with $4.8 billion and $5.0 billion in the second quarter of 2017 and the first quarter of 2018, respectively.  Interest-bearing deposits at banks averaged $4.9 billion during each of the three-month periods ended June 30, 2018 and March 31, 2018, compared with $4.7 billion in the three-month period ended June 30, 2017.  For the six-month periods ended June 30, 2018 and 2017, average balances of interest-bearing deposits at banks were $4.9 billion and $5.4 billion, respectively. The amounts of investment securities and other earning assets held by the Company are influenced by such factors as demand for loans, which generally yield more than investment securities and other earning assets, ongoing repayments, the levels of deposits, and management of liquidity (including the LCR) and balance sheet size and resulting capital ratios.  The amounts of interest-bearing deposits at banks at the respective dates were predominantly comprised of deposits held at the Federal Reserve Bank of New York.  The levels of those deposits often fluctuate due to changes in deposits of business and trust-related customers or short-term borrowings to manage the Company’s liquidity.

As a result of the changes described herein, average earning assets aggregated $106.2 billion in the most recent quarter, compared with $110.0 billion in the year-earlier quarter and $107.2 billion in the first quarter of 2018.  Average earning assets totaled $106.7 billion and $111.0 billion during the first six months of 2018 and 2017, respectively.

The most significant source of funding for the Company is core deposits.  The Company considers noninterest-bearing deposits, interest-bearing transaction accounts, savings deposits and time deposits of $250,000 or less as core deposits.  The Company’s branch network is its principal source of core deposits, which generally carry lower interest rates than wholesale funds of comparable maturities.  Average core deposits totaled $87.7 billion in the

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second quarter of 2018, compared with $92.0 billion in the corresponding 2017 quarter and $88.9 billion in the first quarter of 2018.  The decline in average core deposits in the second quarter of 2018 from the year-earlier quarter reflected a $2.3 billion, or 30%, decline in average balances of time deposits of $250,000 or less, predominantly related to maturities of relatively high-rate time deposits, and lower balances of savings and interest-checking deposits associated with commercial escrow deposits.  As compared with the first quarter of 2018, factors contributing to the lower average core deposits in the recent quarter included declines in commercial savings deposits, including escrow deposits, time deposits of $250,000 or less and noninterest-bearing deposits, reflecting declines in deposits associated with trust customers.  The following table provides an analysis of quarterly changes in the components of average core deposits.

AVERAGE CORE DEPOSITS

			Percent Increase
			(Decrease) from
	2nd Qtr.		1st Qtr.				1st Qtr.
	2018		2017				2018
	(In millions)
Savings and interest-checking deposits	$	50,871		(3	)	%		(1	)	%
Time deposits		5,356		(30	)			(5	)
Noninterest-bearing deposits		31,426		(1	)			(2	)
Total	$	87,653		(5	)	%		(1	)	%

The Company also receives funding from other deposit sources, including branch-related time deposits over $250,000, deposits associated with the Company’s Cayman Islands office and brokered deposits.  Time deposits over $250,000, excluding brokered deposits, averaged $609 million in the recent quarter, compared with $808 million in the corresponding 2017 quarter and $605 million in the first quarter of 2018.  The declines in such deposits since the second quarter of 2017 were predominantly the result of maturities of higher-rate time deposits.  Cayman Islands office deposits averaged $225 million, $163 million and $248 million for the quarters ended June 30, 2018, June 30, 2017 and March 31, 2018, respectively.  Brokered time deposits averaged $32 million for the quarter ended June 30, 2018 and $59 million in each of the quarters ended June 30, 2017 and March 31, 2018. The Company also had brokered savings and interest-bearing transaction accounts, which in the aggregate averaged $1.7 billion, $1.1 billion and $1.3 billion in the quarters ended June 30, 2018, June 30, 2017 and March 31, 2018, respectively.  Additional amounts of Cayman Islands office deposits or brokered deposits may be added in the future depending on market conditions, including demand by customers and other investors for those deposits, and the cost of funds available from alternative sources at the time.

The Company also uses borrowings from banks, securities dealers, various Federal Home Loan Banks, the Federal Reserve Bank of New York and others as sources of funding.  Short-term borrowings represent borrowing arrangements that at the time they were entered into had a contractual maturity of one year or less.  Average short-term borrowings totaled $353 million in the second quarter of 2018, compared with $212 million in the year-earlier quarter and $280 million in the first quarter of 2018.  Included in short-term borrowings were unsecured federalfunds borrowings, which generally mature on the next business day, that averaged $232 million in the second quarter of 2018 and $141 million in each of the quarters ended June 30, 2017 and March 31, 2018, respectively.

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Long-term borrowings averaged $8.5 billion in the recent quarter, compared with $8.3 billion in the year-earlier quarter and $8.6 billion in the initial 2018 quarter.  M&T Bank, M&T’s principal banking subsidiary, has a Bank Note Program whereby M&T Bank may offer unsecured senior and subordinated notes.   Average balances of outstanding senior unsecured notes issued under that program were $5.5 billion during each of the three-month periods ended June 30, 2018 and March 31, 2018 and $4.8 billion during the second quarter of 2017.  During January 2018, M&T Bank issued $650 million of fixed rate and $350 million of variable rate senior notes that mature in 2021.  Also included in average long-term borrowings were amounts borrowed from the Federal Home Loan Banks of New York, Atlanta and Pittsburgh of $577 million in each of the two most recent quarters and $977 million during the second quarter of 2017. Subordinated capital notes included in long-term borrowings averaged $1.4 billion, $1.5 billion and $1.6 billion for the three-month periods ended June 30, 2018, June 30, 2017 and March 31, 2018, respectively.  Junior subordinated debentures associated with trust preferred securities that were included in average long-term borrowings were $520 million in each of the three-months periods ended June 30, 2018 and March 31, 2018 and $518 million in the three-month period ended June 30, 2017. Additional information regarding junior subordinated debentures is provided in note 4 of Notes to Financial Statements.  Long-term borrowings also included agreements to repurchase securities, which averaged $417 million in the second quarter of 2018, $430 million in the year-earlier quarter and $420 million in the first quarter of 2018.  The repurchase agreements held at June 30, 2018 totaled $416 million and have various repurchase dates through 2020, however, the contractual maturities of the underlying securities extend beyond such repurchase dates.  The Company has utilized interest rate swap agreements to modify the repricing characteristics of certain components of long-term debt.  As of June 30, 2018, interest rate swap agreements were used to hedge approximately $4.7 billion of outstanding fixed rate long-term borrowings.  Further information on interest rate swap agreements is provided in note 9 of Notes to Financial Statements.  In July 2018, M&T issued $750 million of senior notes that mature in July 2023, of which $500 million have a 3.55% fixed interest rate and $250 million have a variable rate paid quarterly at rates that are indexed to the three-month LIBOR.

Net interest income can be impacted by changes in the composition of the Company’s earning assets and interest-bearing liabilities, as discussed herein, as well as changes in interest rates and spreads.  Net interest spread, or the difference between the taxable-equivalent yield on earning assets and the rate paid on interest-bearing liabilities, was 3.57% in the second quarter of 2018, compared with 3.27% in the year-earlier quarter.  The yield on earning assets during the recent quarter was 4.28%, up 49 basis points from 3.79% in the corresponding 2017 quarter, while the rate paid on interest-bearing liabilities increased 19 basis points to .71% in the recent quarter from .52% in the year-earlier period.  In the first quarter of 2018, the net interest spread was 3.47%, the yield on earning assets was 4.11% and the rate paid on interest-bearing liabilities was .64%.  For the first six months of 2018, the net interest spread was 3.52%, up 31 basis points from the year-earlier period.  The yield on earning assets and the rate paid on interest-bearing liabilities for the first half of 2018 were 4.20% and .68%, respectively, compared with 3.73% and .52%, respectively, in the similar 2017 period. The widening of the net interest spread in each comparison was largely due to the effect of increases in short-term interest rates initiated by the Federal Reserve in March, June and December of 2017 and in March  and June of 2018 that contributed to higher yields on loans and leases.

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Net interest-free funds consist largely of noninterest-bearing demand deposits and shareholders’ equity, partially offset by bank owned life insurance and non-earning assets, including goodwill and core deposit and other intangible assets.  Net interest-free funds averaged $38.6 billion in the second quarter of 2018, compared with $39.1 billion and $39.3 billion in the second quarter of 2017 and first quarter of 2018, respectively.  The decrease in average net interest-free funds in the most recent quarter as compared with the second quarter of 2017 and first quarter of 2018 reflects lower average balances of noninterest-bearing deposits.  Those deposits averaged $31.4 billion, $31.9 billion and $32.0 billion in the quarters ended June 30, 2018, June 30, 2017 and March 31, 2018, respectively.  During the first half of 2018 and 2017, average net interest-free funds aggregated $38.9 billion and $39.8 billion, respectively.  Shareholders’ equity averaged $15.5 billion during the three-month period ended June 30, 2018, compared with $16.3 billion and $16.1 billion during the three-month periods ended June 30, 2017 and March 31, 2018, respectively.  Goodwill and core deposit and other intangible assets averaged $4.7 billion in each of those three quarters. The cash surrender value of bank owned life insurance averaged $1.8 billion in each of the three-month periods ended June 30, 2018, June 30, 2017 and March 31, 2018.  Increases in the cash surrender value of bank owned life insurance and benefits received are not included in interest income, but rather are recorded in “other revenues from operations.”  The contribution of net interest-free funds to net interest margin was .26% in the second quarter of 2018, compared with .18% and .24% in the second quarter of 2017 and first quarter of 2018, respectively.  That contribution for the first half of 2018 and 2017 was .25% and .19%, respectively.

Reflecting the changes to the net interest spread and the contribution of interest-free funds as described herein, the Company’s net interest margin was 3.83% in the recent quarter, compared with 3.45% in the year-earlier quarter and 3.71% in the initial quarter of 2018. During the first six months of 2018 and 2017, the net interest margin was 3.77% and 3.40%, respectively.  Future changes in market interest rates or spreads, as well as changes in the composition of the Company’s portfolios of earning assets and interest-bearing liabilities that result in reductions in spreads, could adversely impact the Company’s net interest income and net interest margin.

Management assesses the potential impact of future changes in interest rates and spreads by projecting net interest income under several interest rate scenarios.  In managing interest rate risk, the Company has utilized interest rate swap agreements to modify the repricing characteristics of certain portions of its earning assets and interest-bearing liabilities.  Periodic settlement amounts arising from these agreements are reflected in either the yields on earning assets or the rates paid on interest-bearing liabilities.  The notional amount of interest rate swap agreements entered into for interest rate risk management purposes was $7.6 billion (excluding $4.9 billion of forward-starting swap agreements) at June 30, 2018, compared with $5.7 billion at June 30, 2017 and $7.4 billion (excluding $2.0 billion of forward-starting swap agreements) at December 31, 2017. Under the terms of those interest rate swap agreements, the Company received payments based on the outstanding notional amount at fixed rates and made payments at variable rates.

In a fair value hedge, the fair value of the derivative (the interest rate swap agreement) and changes in the fair value of the hedged item are recorded in the Company’s consolidated balance sheet with the corresponding gain or loss recognized in current earnings.  The difference between changes in the fair value of the interest rate swap agreements and the hedged items represents hedge ineffectiveness and coincident with the Company’s adoption of amended hedge accounting guidance on January 1, 2018 is recorded as an adjustment to the interest income or interest expense of the respective hedged item.  Prior to 2018, hedge ineffectiveness was recorded in “other revenues from operations” in the Company’s consolidated statement of income.  In a cash flow hedge, the effective portion of the derivative’s gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings when the forecasted transaction affects earnings.  The ineffective portion of the derivative’s gain or loss on cash flow hedges is accounted for similar to that associated with fair value hedges.  The amounts of hedge ineffectiveness recognized during each of the quarters ended June 30, 2018, June 30, 2017 and March 31, 2018 were not material to the Company’s consolidated results of operations.  Information regarding the fair value of interest rate swap agreements and hedge ineffectiveness is presented in note 9 of Notes to Financial Statements.  The changes in the fair values of the interest rate swap agreements and the hedged items primarily result from the effects of changing interest rates and spreads.  

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The weighted-average rates to be received and paid under interest rate swap agreements currently in effect were 2.07% and 2.44%, respectively, at June 30, 2018.  The average notional amounts of interest rate swap agreements entered into for interest rate risk management purposes, the related effect on net interest income and margin, and the weighted-average interest rates paid or received on those swap agreements are presented in the accompanying table.  Additional information about the Company’s use of interest rate swap agreements and other derivatives is included in note 9 of Notes to Financial Statements.

INTEREST RATE SWAP AGREEMENTS

	Three Months Ended June 30
.	2018							2017
	Amount			Rate(a)				Amount			Rate(a)
	(Dollars in thousands)
Increase (decrease) in:
Interest income	$	(2,889	)		(.01	)	%	$	1,094			—		%
Interest expense		2,332			.01				(5,904	)		(.03	)
Net interest income/margin	$	(5,221	)		(.02	)	%	$	6,998			.02		%
Average notional amount	$	7,550,000						$	4,109,890
Rate received (b)					2.06		%					2.31		%
Rate paid (b)					2.33		%					1.61		%

	Six Months Ended June 30
	2018							2017
	Amount			Rate(a)				Amount			Rate(a)
Increase (decrease) in:
Interest income	$	(3,469	)		(.01	)	%	$	1,094			—		%
Interest expense		803			—				(9,552	)		(.03	)
Net interest income/margin	$	(4,272	)		(.01	)	%	$	10,646			.02		%
Average notional amount	$	7,590,608						$	2,513,812
Rate received (b)					2.05		%					2.56		%
Rate paid (b)					2.16		%					1.70		%

(a) Computed as an annualized percentage of average earning assets or interest-bearing liabilities.

(b) Weighted-average rate paid or received on interest rate swap agreements in effect during the period.

In addition to interest rate swap agreements, the Company has entered into interest rate floor agreements that are accounted for in the trading account rather than as hedging instruments but, nevertheless, provide the Company with protection against the possibility of future declines in interest rates on earning assets.  At June 30, 2018 and December 31, 2017, outstanding notional amounts of such agreements totaled $15.6 billion and $6.3 billion, respectively.

As a financial intermediary, the Company is exposed to various risks, including liquidity and market risk.  Liquidity refers to the Company’s ability to ensure that sufficient cash flow and liquid assets are available to satisfy current and future obligations, including demands for loans and deposit withdrawals, funding operating costs, and other corporate purposes.  Liquidity risk arises whenever the maturities of financial instruments included in assets and liabilities differ.  M&T’s bank subsidiaries have access to additional funding sources through borrowings from the FHLB of New York, lines of credit with the Federal Reserve Bank of New York, the previously noted Bank Note Program, and other available borrowing facilities.  The Company has, from time to time, issued subordinated capital notes and junior subordinated debentures associated with trust preferred securities to provide liquidity and enhance regulatory capital ratios.  However, pursuant to the Dodd-Frank Act, the Company’s junior subordinated debentures associated with trust preferred securities have been phased-out of the definition of Tier 1 capital but, similar to other subordinated capital notes, are considered Tier 2 capital and are includable in total regulatory capital.

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The Company has informal and sometimes reciprocal sources of funding available through various arrangements for unsecured short-term borrowings from a wide group of banks and other financial institutions.  Short-term federal funds borrowings were $2.6 billion, $140 million and $125 million at June 30, 2018, June 30, 2017 and December 31, 2017, respectively.  In general, those borrowings were unsecured and matured on the next business day.  The increase at the recent quarter-end as compared with June 30 and December 31, 2017 represented borrowings associated with the Company’s management of its liquidity position, including compliance with LCR requirements.  Included in short-term borrowings at June 30, 2018 were overnight borrowings from the Federal Home Loan Bank of New York totaling $585 million which were also entered into by the Company to manage its liquidity position.  In addition to satisfying customer demand, Cayman Islands office deposits may be used by the Company as an alternative to short-term borrowings.  Cayman Islands office deposits totaled $261 million at June 30, 2018, $196 million at June 30, 2017 and $178 million at December 31, 2017.  The Company has also benefited from the placement of brokered deposits.  The Company had brokered savings and interest-bearing checking deposit accounts which aggregated approximately $2.1 billion at June 30, 2018, $1.1 billion at June 30, 2017 and $1.3 billion at December 31, 2017.  Brokered time deposits were not a significant source of funding as of those dates.

The Company’s ability to obtain funding from these other sources could be negatively impacted should the Company experience a substantial deterioration in its financial condition or its debt ratings, or should the availability of short-term funding become restricted due to a disruption in the financial markets.  The Company attempts to quantify such credit-event risk by modeling scenarios that estimate the liquidity impact resulting from a short-term ratings downgrade over various grading levels.  Such impact is estimated by attempting to measure the effect on available unsecured lines of credit, available capacity from secured borrowing sources and securitizable assets.  In addition to deposits and borrowings, other sources of liquidity include maturities of investment securities and other earning assets, repayments of loans and investment securities, and cash generated from operations, such as fees collected for services.

Certain customers of the Company obtain financing through the issuance of variable rate demand bonds (“VRDBs”).  The VRDBs are generally enhanced by letters of credit provided by M&T Bank.  M&T Bank oftentimes acts as remarketing agent for the VRDBs and, at its discretion, may from time-to-time own some of the VRDBs while such instruments are remarketed.  When this occurs, the VRDBs are classified as trading account assets in the Company’s consolidated balance sheet.  Nevertheless, M&T Bank is not contractually obligated to purchase the VRDBs.  The value of VRDBs in the Company’s trading account was not material at June 30, 2018 or December 31, 2017.  The total amounts of VRDBs outstanding backed by M&T Bank letters of credit were $903 million at June 30, 2018, compared with $1.2 billion at June 30, 2017 and $1.0 billion at December 31, 2017.  M&T Bank also serves as remarketing agent for most of those bonds.

The Company enters into contractual obligations in the normal course of business that require future cash payments.  Such obligations include, among others, payments related to deposits, borrowings, leases and other contractual commitments.  Off-balance sheet commitments to customers may impact liquidity, including commitments to extend credit, standby letters of credit, commercial letters of credit, financial guarantees and indemnification contracts, and commitments to sell real estate loans.  Because many of these commitments or contracts expire without being funded in whole or in part, the contract amounts are not necessarily indicative of future cash flows.  Further discussion of these commitments is provided in note 12 of Notes to Financial Statements.

M&T’s primary source of funds to pay for operating expenses, shareholder dividends and treasury stock repurchases has historically been the receipt of dividends from its bank subsidiaries, which are subject to various regulatory limitations.  Dividends from any bank subsidiary to M&T are limited by the amount of earnings of the subsidiary in the current year and the two preceding years.  For purposes of that test, at June 30, 2018 approximately $568 million was available for payment of dividends to M&T from bank subsidiaries. Information regarding the long-term debt obligations of M&T is included in note 4 of Notes to Financial Statements.

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Management closely monitors the Company’s liquidity position on an ongoing basis for compliance with internal policies and believes that available sources of liquidity are adequate to meet funding needs anticipated in the normal course of business.  Management does not anticipate engaging in any activities, either currently or in the long-term, for which adequate funding would not be available and would therefore result in a significant strain on liquidity at either M&T or its subsidiary banks. Banking regulators have enacted the LCR rules requiring a banking company to maintain a minimum amount of liquid assets to withstand a standardized supervisory liquidity stress scenario. The Company is in compliance with the requirements of those rules.

Market risk is the risk of loss from adverse changes in the market prices and/or interest rates of the Company’s financial instruments.  The primary market risk the Company is exposed to is interest rate risk.  Interest rate risk arises from the Company’s core banking activities of lending and deposit-taking, because assets and liabilities reprice at different times and by different amounts as interest rates change.  As a result, net interest income earned by the Company is subject to the effects of changing interest rates.  The Company measures interest rate risk by calculating the variability of net interest income in future periods under various interest rate scenarios using projected balances for earning assets, interest-bearing liabilities and derivatives used to hedge interest rate risk.  Management’s philosophy toward interest rate risk management is to limit the variability of net interest income.  The balances of financial instruments used in the projections are based on expected growth from forecasted business opportunities, anticipated prepayments of loans and investment securities, and expected maturities of investment securities, loans and deposits.  Management uses a “value of equity” model to supplement the modeling technique described above.  Those supplemental analyses are based on discounted cash flows associated with on- and off-balance sheet financial instruments.  Such analyses are modeled to reflect changes in interest rates and provide management with a long-term interest rate risk metric.  The Company has entered into interest rate swap agreements to help manage exposure to interest rate risk.  At June 30, 2018, the aggregate notional amount of interest rate swap agreements entered into for risk management purposes that were currently in effect was $7.6 billion.  In addition, the Company has entered into $4.9 billion of forward-starting interest rate swap agreements that will become effective as a like amount of swap agreements mature.

The Company’s Asset-Liability Committee, which includes members of senior management, monitors the sensitivity of the Company’s net interest income to changes in interest rates with the aid of a computer model that forecasts net interest income under different interest rate scenarios.  In modeling changing interest rates, the Company considers different yield curve shapes that consider both parallel (that is, simultaneous changes in interest rates at each point on the yield curve) and non-parallel (that is, allowing interest rates at points on the yield curve to vary by different amounts) shifts in the yield curve.  In utilizing the model, market-implied forward interest rates over the subsequent twelve months are generally used to determine a base interest rate scenario for the net interest income simulation.  That calculated base net interest income is then compared to the income calculated under the varying interest rate scenarios.  The model considers the impact of ongoing lending and deposit-gathering activities, as well as interrelationships in the magnitude and timing of the repricing of financial instruments, including the effect of changing interest rates on expected prepayments and maturities.  When deemed prudent, management has taken actions to mitigate exposure to interest rate risk through the use of on- or off-balance sheet financial instruments and intends to do so in the future.  Possible actions include, but are not limited to, changes in the pricing of loan and deposit products, modifying the composition of earning assets and interest-bearing liabilities, and adding to, modifying or terminating existing interest rate swap agreements or other financial instruments used for interest rate risk management purposes.

The accompanying table as of June 30, 2018 and December 31, 2017 displays the estimated impact on net interest income in the base scenario described above resulting from parallel changes in interest rates across repricing categories during the first modeling year.

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SENSITIVITY OF NET INTEREST INCOME

TO CHANGES IN INTEREST RATES

	Calculated Increase (Decrease) in Projected Net Interest Income
Changes in interest rates	June 30, 2018			December 31, 2017
	(In thousands)
+200 basis points	$	72,864			81,570
+100 basis points		56,589			64,434
-100 basis points		(122,181	)		(94,014	)

The Company utilized many assumptions to calculate the impact that changes in interest rates may have on net interest income.  The more significant of those assumptions included the rate of prepayments of mortgage-related assets, cash flows from derivative and other financial instruments held for non-trading purposes, loan and deposit volumes and pricing, and deposit maturities.  In the scenarios presented, the Company also assumed gradual changes in interest rates during a twelve-month period as compared with the base scenario.  In the declining rate scenario, the rate changes may be limited to lesser amounts such that interest rates remain positive on all points of the yield curve.  The assumptions used in interest rate sensitivity modeling are inherently uncertain and, as a result, the Company cannot precisely predict the impact of changes in interest rates on net interest income.  Actual results may differ significantly from those presented due to the timing, magnitude and frequency of changes in interest rates and changes in market conditions and interest rate differentials (spreads) between maturity/repricing categories, as well as any actions, such as those previously described, which management may take to counter such changes. As noted herein, the Company has used interest rate swap agreements designated as hedging instruments to mitigate the Company’s exposure to volatility in future net interest income.  The Company has also entered into interest rate floor agreements that are included in the trading account.  Such floor agreements provide the Company with protection against the possibility of future declines in interest rates on its earning assets.  In light of the uncertainties and assumptions associated with the process, the amounts presented in the table are not considered significant to the Company’s past or projected net interest income.

Changes in fair value of the Company’s financial instruments can also result from a lack of trading activity for similar instruments in the financial markets.  That impact is most notable on the values assigned to some of the Company’s investment securities.  Information about the fair valuation of investment securities is presented herein under the heading “Capital” and in notes 2 and 11 of Notes to Financial Statements.

The Company engages in limited trading account activities to meet the financial needs of customers and to fund the Company’s obligations under certain deferred compensation plans.  Financial instruments utilized in trading account activities consist predominantly of interest rate contracts, such as interest rate swap agreements, and forward and futures contracts related to foreign currencies.  The Company generally mitigates the foreign currency and interest rate risk associated with trading account activities by entering into offsetting trading positions that are also included in the trading account.  The fair values of trading account positions associated with interest rate contracts and foreign currency and other option and futures contracts are presented in note 9 of Notes to Financial Statements.  The amounts of gross and net trading account positions, as well as the type of trading account activities conducted by the Company, are subject to a well-defined series of potential loss exposure limits established by management and approved by M&T’s Board of Directors.  However, as with any non-government guaranteed financial instrument, the Company is exposed to credit risk associated with counterparties to the Company’s trading account activities.

The notional amounts of interest rate contracts entered into for trading account purposes totaled $40.3 billion at June 30, 2018, $22.8 billion at June 30, 2017 and $29.9 billion at December 31, 2017.  The notional amounts of foreign currency and other option and futures contracts entered into for trading account purposes were $647 million at June 30, 2018, compared with $530 million at each of June 30, 2017 and December 31, 2017.  Although the notional amounts of these contracts are not recorded in the consolidated balance sheet, the unsettled fair values of all financial instruments used for trading account activities are recorded in the consolidated balance sheet.  The fair

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values of all trading account assets and liabilities recognized were $148 million and $282 million, respectively, at June 30, 2018 and $133 million and $137 million, respectively, at December 31, 2017.  The fair value asset and liability amounts at June 30, 2018 have been reduced by contractual settlements of $272 million and $4 million, respectively.  Included in trading account assets were assets related to deferred compensation plans aggregating $21 million at June 30, 2018 and $23 million at each of June 30, 2017 and December 31, 2017.  Changes in the fair values of such assets are recorded as “trading account and foreign exchange gains” in the consolidated statement of income.  Included in “other liabilities” in the consolidated balance sheet at each of June 30, 2018 and June 30, 2017 were $26 million of liabilities related to deferred compensation plans, compared with $27 million at December 31, 2017.  Changes in the balances of such liabilities due to the valuation of allocated investment options to which the liabilities are indexed are recorded in “other costs of operations” in the consolidated statement of income.  Also included in trading account assets were investments in mutual funds and other assets that the Company was required to hold under terms of certain non-qualified supplemental retirement and other benefit plans that were assumed by the Company in various acquisitions.  Those assets totaled $25 million at June 30, 2018 and $24 million at each of June 30, 2017 and December 31, 2017.

Given the Company’s policies, limits and positions, management believes that the potential loss exposure to the Company resulting from market risk associated with trading account activities was not material, however, as previously noted, the Company is exposed to credit risk associated with counterparties to transactions related to the Company’s trading account activities.  Additional information about the Company’s use of derivative financial instruments in its trading account activities is included in note 9 of Notes to Financial Statements.

Provision for Credit Losses

The Company maintains an allowance for credit losses that in management’s judgment appropriately reflects losses inherent in the loan and lease portfolio.  A provision for credit losses is recorded to adjust the level of the allowance as deemed necessary by management.  The provision for credit losses in the second quarter of 2018 was $35 million, compared with $52 million in the year-earlier quarter and $43 million in the first quarter of 2018. For the six-month periods ended June 30, 2018 and 2017, the provision for credit losses was $78 million and $107 million, respectively. Net charge-offs of loans were $35 million in the recent quarter, compared with $45 million and $41 million in the second quarter of 2017 and the first quarter of 2018, respectively.  Net charge-offs as an annualized percentage of average loans and leases were .16% in the second quarter of 2018, .20% in the corresponding quarter of 2017 and .19% in the initial 2018 quarter. Net charge-offs for the six-month periods ended June 30 totaled $76 million in 2018 and $88 million in 2017. A summary of net charge-offs by loan type is presented in the table that follows.

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NET CHARGE-OFFS (RECOVERIES)

BY LOAN/LEASE TYPE

	2018
	First Quarter		Second Quarter		Year- to-date
	(In thousands)
Commercial, financial, leasing, etc.	$	9,758		8,491		18,249
Real estate:
Commercial		1,143		3,111		4,254
Residential		2,844		2,166		5,010
Consumer		26,782		21,655		48,437
	$	40,527		35,423		75,950

	2017
	First Quarter		Second Quarter		Year- to-date
	(In thousands)
Commercial, financial, leasing, etc.	$	11,896		21,814		33,710
Real estate:
Commercial		3,971		1,419		5,390
Residential		4,752		3,169		7,921
Consumer		21,948		18,803		40,751
	$	42,567		45,205		87,772

Included in net charge-offs of consumer loans were net charge-offs of: automobile loans of $8 million in the second quarter of 2018, $7 million in the second quarter of 2017 and $10 million in the first quarter of 2018; recreational vehicle loans of $3 million in the second quarter of 2018, $2 million in the year-earlier quarter and $5 million in the first quarter of 2018; and home equity loans and lines of credit secured by one-to-four family residential properties of $3 million in each of the recent quarter and the second quarter of 2017 and $2 million in the first quarter of 2018.

Loans acquired in connection with acquisition transactions subsequent to 2008 were recorded at fair value with no carry-over of any previously recorded allowance for credit losses.  Determining the fair value of the acquired loans required estimating cash flows expected to be collected on the loans and discounting those cash flows at then-current interest rates.  For acquired loans where fair value was less than outstanding principal as of the acquisition date and the resulting discount was due, at least in part, to credit deterioration, the excess of expected cash flows over the carrying value of the loans is recognized as interest income over the lives of loans.  The difference between contractually required payments and the cash flows expected to be collected is referred to as the nonaccretable balance and is not recorded on the consolidated balance sheet.  The nonaccretable balance reflects estimated future credit losses and other contractually required payments that the Company does not expect to collect.  The Company regularly evaluates the reasonableness of its cash flow projections associated with such loans, including its estimates of lifetime principal losses. Any decreases to the expected cash flows require the Company to evaluate the need for an additional allowance for credit losses and could lead to charge-offs of loan balances.  Any significant increases in expected cash flows result in additional interest income to be recognized over the then-remaining lives of the loans.  The carrying amount of loans acquired at a discount subsequent to 2008 and accounted for based on expected cash flows was $864 million, $1.4 billion and $1.0 billion at June 30, 2018, June 30, 2017 and December 31, 2017, respectively.  The nonaccretable balance related to remaining principal losses associated with loans acquired at a discount as of June 30, 2018 and December 31, 2017 is presented in the accompanying table.

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NONACCRETABLE BALANCE - PRINCIPAL

	Remaining balance
	June 30, 2018		December 31, 2017
	(In thousands)
Commercial, financial, leasing, etc.	$	3,003		3,586
Commercial real estate		24,339		28,783
Residential real estate		29,362		33,880
Consumer		7,223		7,482
Total	$	63,927		73,731

For acquired loans where the fair value exceeded the outstanding principal balance, the resulting premium is recognized as a reduction of interest income over the lives of the loans. Immediately following the acquisition date and thereafter, an allowance for credit losses is recorded for incurred losses inherent in the portfolio, consistent with the accounting for originated loans and leases. The carrying amount of Hudson City loans acquired in 2015 at a premium was $10.0 billion and $11.5 billion at June 30, 2018 and December 31, 2017, respectively. GAAP does not allow the credit loss component of the net premium associated with those loans to be bifurcated and accounted for as a nonaccreting balance as is the case with purchased impaired loans and other loans acquired at a discount.  Rather, subsequent to the acquisition date, incurred losses associated with those loans are evaluated using methods consistent with those applied to originated loans and such losses are considered by management in evaluating the Company’s allowance for credit losses.

Nonaccrual loans aggregated $820 million or .93% of total loans and leases outstanding at June 30, 2018, compared with $872 million or .98% a year earlier, $883 million or 1.00% at December 31, 2017 and $865 million or .99% at March 31, 2018. The lower level of nonaccrual loans at the recent quarter-end as compared with the prior dates reflects the effect of borrower repayment performance and charge-offs.

Accruing loans past due 90 days or more (excluding loans acquired at a discount) were $223 million, or .25% of total loans and leases at June 30, 2018, compared with $265 million or .30% at June 30, 2017, $244 million or .28% at December 31, 2017 and $235 million or .27% at March 31, 2018.  Those amounts included loans guaranteed by government-related entities of $202 million at June 30, 2018, $235 million at each of the quarters ended June 30, 2017 and December 31, 2017 and $224 million at March 31, 2018. Guaranteed loans included one-to-four family residential mortgage loans serviced by the Company that were repurchased to reduce associated servicing costs, including a requirement to advance principal and interest payments that had not been received from individual mortgagors.  Despite the loans being purchased by the Company, the insurance or guarantee by the applicable government-related entity remains in force.  The outstanding principal balances of the repurchased loans that are guaranteed by government-related entities totaled $175 million at June 30, 2018, $185 million at June 30, 2017, $207 million at December 31, 2017 and $194 million at March 31, 2018.  The remaining accruing loans past due 90 days or more not guaranteed by government-related entities were loans considered to be with creditworthy borrowers that were in the process of collection or renewal.  

Purchased impaired loans are loans obtained in acquisition transactions subsequent to 2008 that as of the acquisition date were specifically identified as displaying signs of credit deterioration and for which the Company did not expect to collect all contractually required principal and interest payments.  Those loans were impaired at the date of acquisition, were recorded at estimated fair value and were generally delinquent in payments, but, in accordance with GAAP, the Company continues to accrue interest income on such loans based on the estimated expected cash flows associated with the loans.  The carrying amount of such loans was $352 million at June 30, 2018, or .4% of total loans. Of that amount, $332 million was associated with the acquisition of Hudson City. Purchased impaired loans totaled $512 million and $410 million at June 30, 2017 and December 31, 2017, respectively.

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The Company modified the terms of select loans in an effort to assist borrowers.  If the borrower was experiencing financial difficulty and a concession was granted, the Company considered such modifications as troubled debt restructurings.  Loan modifications included such actions as the extension of loan maturity dates and the lowering of interest rates and monthly payments.  The objective of the modifications was to increase loan repayments by customers and thereby reduce net charge-offs. In accordance with GAAP, the modified loans are included in impaired loans for purposes of determining the level of the allowance for credit losses.  Information about modifications of loans that are considered troubled debt restructurings is included in note 3 of Notes to Financial Statements.

Residential real estate loans modified under specified loss mitigation programs prescribed by government guarantors have not been included in renegotiated loans because the loan guarantee remains in full force and, accordingly, the Company has not granted a concession with respect to the ultimate collection of the original loan balance.  Such loans aggregated $179 million, $180 million, and $189 million at June 30, 2018, June 30, 2017 and December 31, 2017, respectively.

Nonaccrual commercial loans and leases totaled $245 million, $201 million, $241 million and $263 million at June 30, 2018, June 30, 2017, December 31, 2017 and March 31, 2018, respectively. Commercial real estate loans in nonaccrual status aggregated $166 million, $225 million, $202 million and $167 million at June 30, 2018, June 30, 2017, December 31, 2017 and March 31, 2018, respectively.  Nonaccrual commercial real estate loans included construction-related loans of $13 million, $23 million, $17 million and $14 million at June 30, 2018, June 30, 2017, December 31, 2017 and March 31, 2018, respectively.  Those nonaccrual construction loans included loans to residential builders and developers of $5 million, $7 million, $6 million and $5 million at June 30, 2018, June 30, 2017, December 31, 2017 and March 31, 2018, respectively.

Nonaccrual residential real estate loans totaled $313 million at June 30, 2018, compared with $343 million at June 30, 2017, $332 million at December 31, 2017 and $333 million at March 31, 2018.  Reflected in residential real estate loans classified as nonaccrual were previously performing loans obtained in the acquisition of Hudson City that became more than 90 days delinquent.  Such nonaccrual residential real estate loans aggregated $220 million at June 30, 2018, $211 million at June 30, 2017, $215 million at December 31, 2017 and $223 million at March 31, 2018. Those loans could not be identified as purchased impaired loans at the acquisition date because the borrowers were making loan payments at the time and the loans were not recorded at a discount. Included in residential real estate loans classified as nonaccrual were limited documentation first mortgage loans of $97 million at June 30, 2018 (including $76 million obtained in the acquisition of Hudson City), $106 million at June 30, 2017, $96 million at December 31, 2017 and $99 million at March 31, 2018.  Limited documentation first mortgage loans represent loans secured by residential real estate that at origination typically included some form of limited borrower documentation requirements as compared with more traditional loans. Such loans in the Company’s portfolio prior to the Hudson City transaction were originated by the Company before 2008. Hudson City discontinued its limited documentation loan program in January 2014.  Residential real estate loans past due 90 days or more and accruing interest (excluding loans acquired at a discount) aggregated $200 million at June 30, 2018, compared with $233 million at each of June 30, 2017 and December 31, 2017 and $222 million at March 31, 2018.  A substantial portion of such amounts related to guaranteed loans repurchased from government-related entities. Information about the location of nonaccrual and charged-off residential real estate loans as of and for the quarter ended June 30, 2018 is presented in the accompanying table.

Nonaccrual consumer loans were $96 million at June 30, 2018, compared with $103 million at June 30, 2017, $108 million at December 31, 2017 and $102 million at March 31, 2018.  Included in nonaccrual consumer loans at June 30, 2018, June 30, 2017, December 31, 2017 and March 31, 2018 were: automobile loans of $20 million, $17 million, $24 million and $21 million, respectively; recreational vehicle loans of $7 million, $5 million, $6 million and $5 million, respectively; and outstanding balances of home equity loans and lines of credit of $67 million, $77 million, $75 million and $73 million, respectively.  Information about the location of nonaccrual and charged-off home equity loans and lines of credit as of and for the quarter ended June 30, 2018 is presented in the accompanying table.

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Information about past due and nonaccrual loans as of June 30, 2018 and December 31, 2017 is also included in note 3 of Notes to Financial Statements.

SELECTED RESIDENTIAL REAL ESTATE-RELATED LOAN DATA

								Quarter Ended
	June 30, 2018							June 30, 2018
			Nonaccrual					Net Charge-offs (Recoveries)
											Annualized Percent of
					Percent of						Average
	Outstanding				Outstanding						Outstanding
	Balances		Balances		Balances			Balances			Balances
	(Dollars in thousands)
Residential mortgages:
New York	$	5,272,588	$	67,780		1.29	%	$	1,744			.13	%
Pennsylvania		1,311,000		13,200		1.01			414			.12
Maryland		1,092,534		11,552		1.06			(243	)		(.09	)
New Jersey		3,951,018		58,211		1.47			587			.06
Other Mid-Atlantic (a)		978,446		9,113		.93			(206	)		(.08	)
Other		2,917,159		55,657		1.91			(324	)		(.04	)
Total	$	15,522,745	$	215,513		1.39	%	$	1,972			.05	%
Residential construction loans:
New York	$	8,905	$	—		—	%	$	—			—	%
Pennsylvania		3,242		314		9.68			49			5.15
Maryland		3,141		—		—			—			—
New Jersey		2,507		—		—			—			—
Other Mid-Atlantic (a)		5,299		—		—			—			—
Other		5,128		23		.45			(37	)		(2.95	)
Total	$	28,222	$	337		1.19	%	$	12			.19	%
Limited documentation first mortgages:
New York	$	1,202,134	$	41,271		3.43	%	$	124			.04	%
Pennsylvania		56,707		6,555		11.56			8			.05
Maryland		34,047		2,418		7.10			23			.26
New Jersey		1,055,101		24,820		2.35			175			.07
Other Mid-Atlantic (a)		26,857		1,270		4.73			(59	)		(.85	)
Other		384,899		20,474		5.32			(89	)		(.09	)
Total	$	2,759,745	$	96,808		3.51	%	$	182			.03	%
First lien home equity loans and lines of credit:
New York	$	1,201,524	$	13,587		1.13	%	$	308			.10	%
Pennsylvania		746,944		6,961		.93			402			.21
Maryland		608,806		6,002		.99			427			.28
New Jersey		62,935		155		.25			(1	)		(.01	)
Other Mid-Atlantic (a)		199,137		1,939		.97			118			.24
Other		23,404		737		3.15			12			.19
Total	$	2,842,750	$	29,381		1.03	%	$	1,266			.18	%
Junior lien home equity loans and lines of credit:
New York	$	809,392	$	17,511		2.16	%	$	226			.11	%
Pennsylvania		305,569		3,456		1.13			311			.41
Maryland		648,622		9,876		1.52			597			.36
New Jersey		100,441		1,436		1.43			12			.05
Other Mid-Atlantic (a)		275,088		3,390		1.23			272			.39
Other		45,701		1,440		3.15			114			1.01
Total	$	2,184,813	$	37,109		1.70	%	$	1,532			.28	%
Limited documentation junior lien:
New York	$	692	$	—		—	%	$	(1	)		(.55	%)
Pennsylvania		284		—		—			—			—
Maryland		1,259		52		4.13			49			15.36
New Jersey		381		—		—			—			—
Other Mid-Atlantic (a)		596		—		—			—			—
Other		3,740		148		3.96			—			—
Total	$	6,952	$	200		2.88	%	$	48			2.74	%

(a) Includes Delaware, Virginia, West Virginia and the District of Columbia.

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Real estate and other foreclosed assets totaled $98 million at June 30, 2018, compared with $104 million at June 30, 2017, $112 million at December 31, 2017 and $102 million at March 31, 2018.  Net gains or losses associated with real estate and other foreclosed assets were not material during the three-month periods ended June 30, 2018, June 30, 2017 or March 31, 2018.  At June 30, 2018, the Company’s holding of residential real estate-related properties comprised approximately 98% of foreclosed assets.

A comparative summary of nonperforming assets and certain past due, renegotiated and impaired loan data and credit quality ratios is presented in the accompanying table.

NONPERFORMING ASSET AND PAST DUE, RENOGIATED AND IMPAIRED LOAN DATA

	2018 Quarters						2017 Quarters
	Second			First			Fourth			Third			Second
	(Dollars in thousands)
Nonaccrual loans	$	819,984			864,671			882,598			869,362			872,374
Real estate and other foreclosed assets		98,062			101,514			111,910			110,515			104,424
Total nonperforming assets	$	918,046			966,185			994,508			979,877			976,798
Accruing loans past due 90 days or more(a)	$	223,026			235,325			244,405			261,288			265,461
Government guaranteed loans included in totals above:
Nonaccrual loans	$	34,870			36,618			35,677			34,687			39,296
Accruing loans past due 90 days or more		202,394			223,611			235,489			252,072			235,227
Renegotiated loans	$	242,528			226,829			221,513			226,672			221,892
Acquired accruing loans past due 90 days or more(b)	$	47,405			49,349			47,418			56,225			57,498
Purchased impaired loans(c):
Outstanding customer balance	$	606,683			643,124			688,091			779,340			838,476
Carrying amount		352,465			378,000			410,015			466,943			512,393
Nonaccrual loans to total loans and leases, net of unearned discount		.93	%		.99	%		1.00	%		.99	%		.98	%
Nonperforming assets to total net loans and leases and real estate    and other foreclosed assets		1.04	%		1.10	%		1.13	%		1.11	%		1.10	%
Accruing loans past due 90 days or more (a) to total loans and    leases, net of unearned discount		.25	%		.27	%		.28	%		.30	%		.30	%

(a)     Excludes loans acquired at a discount.  Predominantly residential real estate loans.

(b) Loans acquired at a discount that were recorded at fair value at acquisition date. This category does not include purchased impaired loans that are presented separately.

(c)     Accruing loans acquired at a discount that were impaired at acquisition date and recorded at fair value.

Management determined the allowance for credit losses by performing ongoing evaluations of the loan and lease portfolio, including such factors as the differing economic risks associated with each loan category, the financial condition of specific borrowers, the economic environment in which borrowers operate, the level of delinquent loans, the value of any collateral and, where applicable, the existence of any guarantees or indemnifications.  Management evaluated the impact of changes in interest rates and overall economic conditions on the ability of borrowers to meet repayment obligations when quantifying the Company’s exposure to credit losses and the allowance for such losses as of each reporting date.  Factors also considered by management when performing its assessment, in addition to general economic conditions and the other factors described above, included, but were not limited to: (i) the impact of real estate values on the Company’s portfolio of loans secured by commercial and residential real estate; (ii) the concentrations of commercial real estate loans in the Company’s loan portfolio; (iii) the amount of commercial and industrial loans to businesses in areas of New York State outside of the New York City metropolitan area and in central Pennsylvania that have historically experienced less economic growth and vitality than the vast majority of other regions of the country; (iv) the expected repayment performance

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associated with the Company’s first and second lien loans secured by residential real estate; and (v) the size of the Company’s portfolio of loans to individual consumers, which historically have experienced higher net charge-offs as a percentage of loans outstanding than other loan types.  The level of the allowance is adjusted based on the results of management’s analysis.

Management cautiously and conservatively evaluated the allowance for credit losses as of June 30, 2018 in light of:  (i) residential real estate values and the level of delinquencies of loans secured by residential real estate; (ii) economic conditions in the markets served by the Company; (iii) slower growth in private sector employment in upstate New York and central Pennsylvania than in other regions served by the Company and nationally; (iv) the significant subjectivity involved in commercial real estate valuations; and (v) the amount of loan growth experienced by the Company.  While there has been general improvement in economic conditions, concerns continue to exist about the strength and sustainability of such improvements; the volatile nature of global commodity and export markets, including the impact international economic conditions could have on the U.S. economy; Federal Reserve positioning of monetary policy; and continued stagnant population growth in the upstate New York and central Pennsylvania regions (approximately 54% of the Company’s loans and leases are to customers in New York State and Pennsylvania).

As described in note 3 of Notes to Financial Statements, the Company utilizes a loan grading system to differentiate risk amongst its commercial loans and commercial real estate loans.  Loans with a lower expectation of default are assigned one of ten possible “pass” loan grades and are generally ascribed lower loss factors when determining the allowance for credit losses. Loans with an elevated level of credit risk are classified as “criticized” and are ascribed a higher loss factor when determining the allowance for credit losses. Criticized loans may be classified as “nonaccrual” if the Company no longer expects to collect all amounts according to the contractual terms of the loan agreement or the loan is delinquent 90 days or more.  Criticized commercial loans and commercial real estate loans totaled $2.2 billion at June 30, 2018, compared with $2.3 billion at each of June 30, 2017 and March 31, 2018 and $2.5 billion at December 31, 2017.  Given payment performance, amount of supporting collateral, and, in certain instances, the existence of loan guarantees, the Company still expects to collect the full outstanding principal balance on most of those loans.

Loan officers in different geographic locations with the support of the Company’s credit department personnel continuously review and reassign loan grades based on their detailed knowledge of individual borrowers and their judgment of the impact on such borrowers resulting from changing conditions in their respective regions. At least annually, updated financial information is obtained from commercial borrowers associated with pass grade loans and additional analysis is performed.  On a quarterly basis, the Company’s centralized credit department reviews all criticized commercial loans and commercial real estate loans greater than $1 million to determine the appropriateness of the assigned loan grade, including whether the loan should be reported as accruing or nonaccruing.  For criticized nonaccrual loans, additional meetings are held with loan officers and their managers, workout specialists and senior management to discuss each of the relationships. In analyzing criticized loans, borrower-specific information is reviewed, including operating results, future cash flows, recent developments and the borrower’s outlook, and other pertinent data. The timing and extent of potential losses, considering collateral valuation and other factors, and the Company’s potential courses of action are contemplated. To the extent that these loans are collateral-dependent, they are evaluated based on the fair value of the loan’s collateral as estimated at or near the financial statement date. As the quality of a loan deteriorates to the point of classifying the loan as “criticized,” the process of obtaining updated collateral valuation information is usually initiated, unless it is not considered warranted given factors such as the relative size of the loan, the characteristics of the collateral or the age of the last valuation. In those cases where current appraisals may not yet be available, prior appraisals are utilized with adjustments, as deemed necessary, for estimates of subsequent declines in value as determined by line of business and/or loan workout personnel in the respective geographic regions. Those adjustments are reviewed and assessed for reasonableness by the Company’s credit department. Accordingly, for real estate collateral securing larger commercial loans and commercial real estate loans, estimated collateral values are based on current appraisals and estimates of value. For non-real estate loans, collateral is assigned a discounted estimated liquidation value and,

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depending on the nature of the collateral, is verified through field exams or other procedures. In assessing collateral, real estate and non-real estate values are reduced by an estimate of selling costs.

With regard to residential real estate loans, the Company’s loss identification and estimation techniques make reference to loan performance and house price data in specific areas of the country where collateral securing the Company’s residential real estate loans is located. For residential real estate-related loans, including home equity loans and lines of credit, the excess of the loan balance over the net realizable value of the property collateralizing the loan is charged-off when the loan becomes 150 days delinquent.  That charge-off is based on recent indications of value from external parties that are generally obtained shortly after a loan becomes nonaccrual. Loans to consumers that file for bankruptcy are generally charged off to estimated net collateral value shortly after the Company is notified of such filings. At June 30, 2018, approximately 56% of the Company’s home equity portfolio consisted of first lien loans and lines of credit.  Of the remaining junior lien loans in the portfolio, approximately 68% (or approximately 30% of the aggregate home equity portfolio)consisted of junior lien loans that were behind a first lien mortgage loan that was not owned or serviced by the Company.  To the extent known by the Company, if a senior lien loan would be on nonaccrual status because of payment delinquency, even if such senior lien loan was not owned by the Company, the junior lien loan or line that is owned by the Company is placed on nonaccrual status.  At June 30, 2018, the balance of junior lien loans and lines that were in nonaccrual status solely as a result of first lien loan performance was $8 million, compared with $11 million at June 30, 2017, $10 million at December 31, 2017 and $13 million at March 31, 2018.  In monitoring the credit quality of its home equity portfolio for purposes of determining the allowance for credit losses, the Company reviews delinquency and nonaccrual information and considers recent charge-off experience. When evaluating individual home equity loans and lines of credit for charge-off and for purposes of estimating incurred losses in determining the allowance for credit losses, the Company gives consideration to the required repayment of any first lien positions related to collateral property.  Home equity line of credit terms vary but such lines are generally originated with an open draw period of ten years followed by an amortization period of up to twenty years. At June 30, 2018, approximately 81% of all outstanding balances of home equity lines of credit related to lines that were still in the draw period, the weighted-average remaining draw periods were approximately five years, and approximately 21% were making contractually allowed payments that do not include any repayment of principal.

Factors that influence the Company’s credit loss experience include overall economic conditions affecting businesses and consumers, generally, but also residential and commercial real estate valuations, in particular, given the size of the Company’s real estate loan portfolios.  Commercial real estate valuations can be highly subjective, as they are based upon many assumptions.  Such valuations can be significantly affected over relatively short periods of time by changes in business climate, economic conditions, interest rates and, in many cases, the results of operations of businesses and other occupants of the real property.  Similarly, residential real estate valuations can be impacted by housing trends, the availability of financing at reasonable interest rates, and general economic conditions affecting consumers.

In determining the allowance for credit losses, the Company estimates losses attributable to specific troubled credits identified through both normal and targeted credit review processes and also estimates losses inherent in other loans and leases. In quantifying incurred losses, the Company considers the factors and uses the techniques described herein and in note 3 of Notes to Financial Statements. For purposes of determining the level of the allowance for credit losses, the Company segments its loan and lease portfolio by loan type. The amount of specific loss components in the Company’s loan and lease portfolios is determined through a loan-by-loan analysis of commercial loans and commercial real estate loans in nonaccrual status. Measurement of the specific loss components is typically based on expected future cash flows, collateral values or other factors that may impact the borrower’s ability to pay. Losses associated with residential real estate loans and consumer loans are generally determined by reference to recent charge-off history and are evaluated (and adjusted if deemed appropriate) through consideration of other factors including near-term forecasted loss estimates developed by the Company’s credit department. These forecasts give consideration to overall borrower repayment performance and current geographic region changes in collateral values using third party published historical price indices or automated valuation methodologies. With regard to collateral values, the realizability of such values by the Company contemplates

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repayment of any first lien position prior to recovering amounts on a junior lien position. Approximately 44% of the Company’s home equity portfolio consists of junior lien loans and lines of credit. Except for consumer loans and residential real estate loans that are considered smaller balance homogeneous loans and are evaluated collectively and loans obtained at a discount in acquisition transactions, the Company considers a loan to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts according to the contractual terms of the loan agreement or the loan is delinquent 90 days or more and has been placed in nonaccrual status. Those impaired loans are evaluated for specific loss components.  Modified loans, including smaller balance homogenous loans, that are considered to be troubled debt restructurings are evaluated for impairment giving consideration to the impact of the modified loan terms on the present value of the loan’s expected cash flows. Loans less than 90 days delinquent are deemed to have a minimal delay in payment and are generally not considered to be impaired. For loans acquired at a discount, the impact of estimated future credit losses represents the predominant difference between contractually required payments and the cash flows expected to be collected. Subsequent decreases to those expected cash flows require the Company to evaluate the need for an additional allowance for credit losses and could lead to charge-offs of acquired loan balances. Additional information regarding the Company’s process for determining the allowance for credit losses is included in note 3 of Notes to Financial Statements.

Management believes that the allowance for credit losses at June 30, 2018 appropriately reflected credit losses inherent in the portfolio as of that date.  The allowance for credit losses was $1.02 billion, or 1.16% of total loans and leases at each of June 30, 2018 and December 31, 2017 and $1.01 billion, or 1.13%, at June 30, 2017.  The level of the allowance reflects management’s evaluation of the loan and lease portfolio using the methodology and considering the factors as described herein.  Should the various credit factors considered by management in establishing the allowance for credit losses change and should management’s assessment of losses inherent in the loan portfolio also change, the level of the allowance as a percentage of loans could increase or decrease in future periods.  The ratio of the allowance for credit losses to nonaccrual loans was 124% at June 30, 2018, compared with 116% at June 30, 2017 and 115% at December 31, 2017.  Given the Company’s general position as a secured lender and its practice of charging-off loan balances when collection is deemed doubtful, that ratio and changes in that ratio are generally not an indicative measure of the adequacy of the Company’s allowance for credit losses, nor does management rely upon that ratio in assessing the adequacy of the Company’s allowance for credit losses. The level of the allowance reflects management’s evaluation of the loan and lease portfolio as of each respective date.

Other Income

Other income totaled $457 million in the second quarter of 2018, compared with $461 million in the year-earlier quarter and $459 million in the first quarter of 2018.  As compared with the second quarter of 2017, improved trust income and mortgage banking revenues in the recent quarter were offset by declines in credit-related fees and income from bank-owned life insurance and brokerage services.  As compared with the first quarter of 2018, higher trust income, mortgage banking revenues and gains on investment securities in the recent quarter (compared with losses in the preceding quarter) were offset by $23 million of income from Bayview Lending Group LLC (“BLG”) during the first quarter.

Mortgage banking revenues were $92 million in the recent quarter, compared with $86 million in the second quarter of 2017 and $87 million in the initial quarter of 2018.  Mortgage banking revenues are comprised of both residential and commercial mortgage banking activities.  The Company’s involvement in commercial mortgage banking activities includes the origination, sales and servicing of loans under the multi-family loan programs of Fannie Mae, Freddie Mac and the U.S. Department of Housing and Urban Development.

Residential mortgage banking revenues, consisting of realized gains from sales of residential real estate loans and loan servicing rights, unrealized gains and losses on residential real estate loans held for sale and related commitments, residential real estate loan servicing fees, and other residential real estate loan-related fees and income, were $61 million in each of the second quarters of 2018 and 2017 and $62 million in the first quarter of 2018.

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New commitments to originate residential real estate loans to be sold were approximately $644 million in the second quarter of 2018, compared with $773 million in the year-earlier quarter and $625 million in the first quarter of 2018. Realized gains from sales of residential real estate loans and loan servicing rights and recognized net unrealized gains or losses attributable to residential real estate loans held for sale, commitments to originate loans for sale and commitments to sell loans totaled to gains of $12 million in each of the first two quarters of 2018 and $17 million in the second quarter of 2017.

Loans held for sale that were secured by residential real estate aggregated $283 million at June 30, 2018, $340 million at June 30, 2017 and $356 million at December 31, 2017.  Commitments to sell residential real estate loans and commitments to originate residential real estate loans for sale at pre-determined rates totaled $532 million and $361 million, respectively, at June 30, 2018, compared with $692 million and $525 million, respectively, at June 30, 2017 and $595 million and $347 million, respectively, at December 31, 2017.  Net recognized unrealized gains on residential real estate loans held for sale, commitments to sell loans, and commitments to originate loans for sale were $11 million and $17 million at June 30, 2018 and June 30, 2017, respectively, and $10 million at December 31, 2017.  Changes in such net unrealized gains or losses are recorded in mortgage banking revenues and resulted in net increases in revenues of $3 million in the second quarter of 2018 and $4 million in the second quarter of 2017, compared with net decreases in revenues of $2 million in the first quarter of 2018.

Revenues from servicing residential real estate loans for others were $49 million in the recent quarter,  compared with $44 million and $50 million during the quarters ended June 30, 2017 and March 31, 2018, respectively.  Residential real estate loans serviced for others totaled $76.0 billion at June 30, 2018, $72.6 billion at June 30, 2017, $79.2 billion at December 31, 2017 and $78.3 billion at March 31, 2018.  Reflected in residential real estate loans serviced for others were loans sub-serviced for others of $53.5 billion, $49.9 billion, $56.6 billion and $55.8 billion at June 30, 2018, June 30, 2017, December 31, 2017 and March 31, 2018, respectively.  Revenues earned for sub-servicing loans totaled $28 million for the quarter ended June 30, 2018, $25 million for the quarter ended June 30, 2017 and $30 million in the first quarter of 2018. The contractual servicing rights associated with loans sub-serviced by the Company were predominantly held by affiliates of BLG. Information about the Company’s relationship with BLG and its affiliates is included in note 14 of Notes to Financial Statements.

Capitalized servicing rights consist largely of servicing associated with loans sold by the Company.  Capitalized residential mortgage servicing assets aggregated $118 million at June 30, 2018, $117 million at June 30, 2017 and $115 million at December 31, 2017.

Commercial mortgage banking revenues totaled $31 million in the recent quarter, compared with $25 million in each of the second quarter of 2017 and the first quarter of 2018.  Included in such amounts were revenues from loan origination and sales activities of $17 million in the second quarter of 2018, $11 million in the year-earlier quarter and $12 million in the initial quarter of 2018. Commercial real estate loans originated for sale to other investors were approximately $1.3 billion in the recent quarter, compared with $510 million and $518 million in the second quarter of 2017 and the first quarter of 2018, respectively. Loan servicing revenues totaled $14 million in each of the second quarters of 2018 and 2017 and $13 million in the first quarter of 2018.  Capitalized commercial mortgage servicing assets were $110 million and $105 million at June 30, 2018 and June 30, 2017, respectively, and $114 million at December 31, 2017.  Commercial real estate loans serviced for other investors totaled $16.5 billion at June 30, 2018, $15.1 billion a year earlier and $16.2 billion at December 31, 2017 and included $3.3 billion, $3.0 billion and $3.3 billion, respectively, of loan balances for which investors had recourse to the Company if such balances are ultimately uncollectible.  Commitments to sell commercial real estate loans and commitments to originate commercial real estate loans for sale were $1.2 billion and $324 million, respectively, at June 30, 2018, $400 million and $192 million, respectively, at June 30, 2017 and $217 million and $195 million, respectively, at December 31, 2017.  Commercial real estate loans held for sale at June 30, 2018, June 30, 2017 and December 31, 2017 were $868 million, $208 million and $22 million, respectively.   The higher balance at June 30, 2018 reflected loans originated later in 2018’s second quarter that will be delivered to investors in the third quarter.

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Service charges on deposit accounts were $107 million in the recent quarter, compared with $106 million in the year-earlier quarter and $105 million in the first quarter of 2018.  Brokerage services income, which includes revenues from the sale of mutual funds and annuities and securities brokerage fees, aggregated $13 million in each of the first two quarters of 2018 and $17 million in the second quarter of 2017.  Trading account and foreign exchange activity resulted in gains of $5 million during each of the quarters ended June 30, 2018 and March 31, 2018, compared with gains of $8 million in the second quarter of 2017.  The lower gains in the two most recent quarters as compared with the second quarter of 2017 were due largely to valuation changes on interest rate floor agreements that are not accounted for as hedging instruments but, nevertheless, provide the Company with protection against the possibility of future declines in interest rates on its earnings assets.  Information about the notional amount of interest rate, foreign exchange and other contracts entered into by the Company for trading account purposes is included in note 9 of Notes to Financial Statements and herein under the heading “Taxable-equivalent Net Interest Income.”

Trust income includes fees related to two significant businesses.  The Institutional Client Services (“ICS”) business provides a variety of trustee, agency, investment management and administrative services for corporations and institutions, investment bankers, corporate tax, finance and legal executives, and other institutional clients who: (i) use capital markets financing structures; (ii) use independent trustees to hold retirement plan and other assets; and (iii) need investment and cash management services.  The Wealth Advisory Services (“WAS”) business helps high net worth clients grow their wealth, protect it, and transfer it to their heirs.  A comprehensive array of wealth management services are offered, including asset management, fiduciary services and family office services.  Trust income aggregated $138 million in the second quarter of 2018, compared with $127 million in the year-earlier quarter and $131 million in the first quarter of 2018.  Revenues associated with the ICS business were approximately $70 million, $63 million and $67 million during the quarters ended June 30, 2018, June 30, 2017 and March 31, 2018, respectively. The higher revenues in the two most recent quarters as compared with the second quarter of 2017 reflect stronger sales activities and higher retirement services income from growth in collective fund balances. Revenues attributable to WAS totaled approximately $62 million, $60 million and $61 million for the three-month periods ended June 30, 2018, June 30, 2017 and March 31, 2018, respectively.  Trust assets under management were $83.4 billion, $73.3 billion and $82.5 billion at June 30, 2018, June 30, 2017 and December 31, 2017, respectively.  Trust assets under management include the Company’s proprietary mutual funds assets of $9.9 billion, $10.4 billion and $11.2 billion at June 30, 2018, June 30, 2017 and December 31, 2017, respectively.  Additional trust income from investment management activities was $6 million in the recent quarter, compared with $4 million in each of the second quarter of 2017 and the first quarter of 2018.  That income largely relates to fees earned from retail customer investment accounts and from an affiliated investment manager.  Assets managed by that affiliated manager were $6.0 billion at June 30, 2018, $6.9 billion at June 30, 2017 and $6.7 billion at December 31, 2017.  The Company’s trust income from that affiliate was not material during any of the quarters then-ended.

The Company recognized net gains on investment securities of $2 million in the recent quarter, compared with net losses of $9 million in the first quarter of 2018. The gains and losses represented unrealized gains and losses on investments in equity securities, largely Fannie Mae and Freddie Mac preferred stock.  There were no significant gains or losses on investment securities in the second quarter of 2017.

Other revenues from operations were $100 million in the second quarter of 2018, compared with $117 million in the corresponding quarter of 2017 and $126 million in the first quarter of 2018.  The most significant contributor to the recent quarter’s decline as compared with the second quarter of 2017 was lower letters of credit and other credit-related fees. As compared with the first quarter of 2018, the predominant factor for the recent quarter’s decline was $23 million of income from BLG in 2018’s initial quarter.  Information about the Company’s relationship with BLG and its affiliates is included in note 14 of Notes to Financial Statements.  Included in other revenues from operations were the following significant components.  Letter of credit and other credit-related fees aggregated $25 million in the most recent quarter, compared with $35 million in the year-earlier quarter and $29 million in the initial quarter of 2018.  Tax-exempt income from bank owned life insurance, which includes increases in the cash surrender value of life insurance policies and benefits received, totaled $12 million in the second quarter of 2018, compared with $14 million in the second quarter of 2017 and $11 million in the first quarter of 2018.  Revenues from merchant

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discount and credit card fees were $29 million in each of the second quarters of 2018 and 2017, compared with $28 million in the first quarter of 2018.  Insurance-related sales commissions and other revenues totaled $11 million in each of the quarters ended June 30, 2018 and 2017, compared with $13 million in the initial 2018 quarter.

Other income aggregated $916 million during the first six months of 2018, compared with $908 million in the similar 2017 period.  That increase was largely attributable to higher trust income, mortgage banking revenues and income from BLG, partially offset by lower letter of credit and other credit-related fees, trading account and foreign exchange gains, and brokerage services income.

Mortgage banking revenues totaled $180 million during the first half of 2018, compared with $171 million during the first six months of 2017.  Residential mortgage banking revenues aggregated $123 million and $120 million in the six-month periods ended June 30, 2018 and 2017, respectively.  New commitments to originate residential real estate loans to be sold aggregated $1.3 billion and $1.5 billion in the first six months of 2018 and 2017, respectively.  Realized gains from sales of residential real estate loans and loan servicing rights and recognized unrealized gains and losses on residential real estate loans held for sale, commitments to originate loans for sale and commitments to sell loans aggregated to gains of $24 million and $31 million in the six-month periods ended June 30, 2018 and 2017, respectively.  Revenues from servicing residential mortgage loans for others were $99 million in the first half of 2018 and $89 million in the corresponding 2017 period.  Included in servicing revenues were sub-servicing revenues aggregating $58 million and $48 million in the first six months  of 2018 and 2017, respectively.  For the six months ended June 30, commercial mortgage banking revenues were $57 million and $51 million in 2018 and 2017, respectively.  The increase in 2018 as compared with 2017 resulted predominantly from revenues associated with loan origination activities. Commercial real estate loans originated for sale to other investors totaled $1.8 billion and $818 million during the six-month periods ended June 30, 2018 and 2017, respectively.

Service charges on deposit accounts aggregated $212 million during the first half of 2018, compared with $210 million in the year-earlier period.  Trust income totaled $269 million and $247 million during the first six months of 2018 and 2017, respectively.  The increase in trust income in 2018 as compared with 2017 was largely due to higher revenues from the ICS business, reflecting stronger sales activities and higher retirement services income from growth in collective fund balances, and from the WAS business, resulting from improved equity market performance and stronger sales activities.  Brokerage services income declined to $26 million in the first half of 2018 from $34 million in the six-month period ended June 30, 2017, largely due to lower income from sales of annuities and mutual funds.  Trading account and foreign exchange activity resulted in gains of $10 million and $18 million in the first half of 2018 and 2017, respectively.  The lower gains in the 2018 period were predominantly due to valuation changes on interest rate floor agreements.

Other revenues from operations totaled $227 million in the first six months of 2018, compared with $228 million in the year-earlier period.  Other revenues from operations include the following significant components.  Letter of credit and other credit-related fees aggregated $54 million and $69 million in 2018 and 2017, respectively.  The lower revenues in the 2018 period were largely attributable to a decline in fees for providing loan syndication services.  Reflecting lower benefits proceeds, income from bank owned life insurance totaled $23 million in the first six months of 2018, compared with $29 million in the similar 2017 period.  Merchant discount and credit card fees were $57 million and $56 million in the first six months of 2018 and 2017, respectively.  Insurance-related commissions and other revenues aggregated $25 million and $23 million in 2018 and 2017, respectively. M&T’s investment in BLG resulted in income of $23 million in the first six months of 2018 and losses of $1 million in the first half of 2017.

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Other Expense

Other expense totaled $777 million in the second quarter of 2018, compared with $751 million in the year-earlier quarter and $933 million in the first quarter of 2018. Included in those amounts are expenses considered to be “nonoperating” in nature consisting of amortization of core deposit and other intangible assets of $6 million in the recent quarter, $8 million in the second quarter of 2017 and $7 million in the initial 2018 quarter. Exclusive of those nonoperating expenses, noninterest operating expenses were $770 million in the second quarter of 2018, compared with $743 million in the corresponding 2017 quarter and $927 million in the first quarter of 2018.  Higher costs for salaries and employee benefits were the most significant factor associated with the rise in noninterest operating expenses in the recent quarter as compared with the year-earlier quarter. The higher noninterest operating expenses in the first quarter of 2018 reflected a $135 million addition to the reserve for litigation matters and seasonally higher stock-based compensation and employee benefits expenses.  Table 2 provides a reconciliation of other expense to noninterest operating expense.

Other expense for the first half of 2018 totaled $1.71 billion, compared with $1.54 billion in the similar period  of 2017. Included in those amounts are expenses considered to be “nonoperating” in nature consisting of amortization of core deposit and other intangible assets of $13 million and $17 million in the six-month periods ended June 30, 2018 and 2017, respectively. Exclusive of those nonoperating expenses, noninterest operating expenses for the first half of 2018 increased 11% to $1.70 billion from $1.52 billion in the first six months of 2017.  That $175 million increase was largely due to the $135 million increase to the reserve for litigation matters in 2018’s initial quarter and to higher salaries and employee benefits expense.

Salaries and employee benefits expense aggregated $419 million in 2018’s second quarter, compared with $398 million in the year-earlier quarter and $463 million in the first quarter of 2018. During the first half of 2018 and 2017, salaries and employee benefits expense totaled $882 million and $848 million, respectively. The higher salaries and employee benefits expenses in the 2018 periods as compared with the corresponding periods in 2017 largely reflect the impact of annual merit increases for employees and higher incentive-based compensation. The lower level of expenses in the recent quarter as compared with the first quarter of 2018 was attributable to seasonally higher stock-based compensation, medical plan costs, payroll-related taxes, unemployment insurance and the Company’s contributions for retirement savings plan benefits related to annual incentive compensation payments in the initial quarter of 2018.  The Company, in accordance with GAAP, has accelerated the recognition of compensation costs for stock-based awards granted to retirement-eligible employees and employees who will become retirement-eligible prior to full vesting of the award. As a result, stock-based compensation expense during the first quarter of 2018 included $23 million that would have been recognized over the normal vesting period if not for the accelerated expense recognition provisions of GAAP. That acceleration had no effect on the value of stock-based compensation awarded to employees. Salaries and employee benefits expense included stock-based compensation of $11 million and $10 million in the three-month periods ended June 30, 2018 and June 30, 2017, respectively, $35 million in the three-month period ended March 31, 2018, and $45 million and $43 million during the six-month periods ended June 30, 2018 and 2017, respectively. The number of full-time equivalent employees was 16,760 at June 30, 2018, compared with 16,526 at June 30, 2017, 16,456 at December 31, 2017 and 16,531 at March 31, 2017.

Excluding the nonoperating expense items described earlier from each quarter, nonpersonnel operating expenses were $352 million and $344 million in the quarters ended June 30, 2018 and June 30, 2017, respectively, and $463 million in the first quarter of 2018.  On that same basis, such expenses were $815 million and $674 million in the six-month periods ended June 30, 2018 and 2017, respectively.  The decline in nonpersonnel operating expenses in the recent quarter as compared with the initial 2018 quarter was predominantly attributable to the $135 million addition to the reserve for litigation matters in 2018’s first quarter offset, in part, by higher costs for professional services in the recent quarter.  The higher level of nonpersonnel operating expenses in the first six months of 2018 as compared with the corresponding 2017 period resulted primarily from the 2018 increase to the reserve for litigation matters and higher professional services expenses.

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The efficiency ratio measures the relationship of noninterest operating expenses to revenues.  The Company’s efficiency ratio was 52.4% during the recent quarter, compared with 52.7% and 64.0% in the second quarter of 2017 and first quarter of 2018, respectively. The efficiency ratios for the six-month periods ended June 30, 2018 and 2017 were 58.2% and 54.8%, respectively.  The calculation of the efficiency ratio is presented in Table 2.

Income Taxes

The provision for income taxes was $161 million in the second quarter of 2018, compared with $215 million in the year-earlier quarter and $105 million in the initial 2018 quarter.  For the six-month periods ended June 30, 2018 and 2017, the provision for income taxes were $267 million and $385 million, respectively.  The effective tax rates were 24.7%, 36.1% and 23.0% for the quarters ended June 30, 2018, June 30, 2017 and March 31, 2018, respectively, and 24.0% and 34.5% for the six-month periods ended June 30, 2018 and 2017, respectively. The enactment of the Tax Act that was signed into law on December 22, 2017 impacted the effective tax rates in the two most recent quarters. The Tax Act reduced the corporate Federal income tax rate from 35% to 21% effective January 1, 2018 and made other changes to U.S. corporate income tax laws. In addition to the impact of the Tax Act, GAAP requires that excess tax benefits and tax deficiencies associated with share-based compensation be recognized as a discreet component of income tax expense in the income statement. As a result, the Company recognized a reduction of income tax expense of $9 million and $18 million in the initial quarter of 2018 and 2017, respectively.  The impact of that requirement in the second quarters of 2018 and 2017 was not significant.

The effective tax rate is affected by the level of income earned that is exempt from tax relative to the overall level of pre-tax income, the level of income allocated to the various state and local jurisdictions where the Company operates, because tax rates differ among such jurisdictions, and the impact of any large but infrequently occurring items.  The Company’s effective tax rate in future periods will also be affected by the results of operations allocated to the various tax jurisdictions within which the Company operates, any change in income tax laws or regulations within those jurisdictions, and interpretations of income tax regulations that differ from the Company’s interpretations by any of various tax authorities that may examine tax returns filed by M&T or any of its subsidiaries.

Capital

Shareholders’ equity was $15.6 billion at June 30, 2018, representing 13.15% of total assets, compared with $16.3 billion or 13.47% a year earlier and $16.3 billion or 13.70% at December 31, 2017.

Included in shareholders’ equity was preferred stock with financial statement carrying values of $1.2 billion at each of June 30, 2018, June 30, 2017 and December 31, 2017.  Reflecting the impact of repurchases of M&T’s common stock, common shareholders’ equity was $14.3 billion, or $99.43 per share, at June 30, 2018, compared with $15.1 billion, or $98.66 per share, a year earlier and $15.0 billion, or $100.03 per share, at December 31, 2017.  Tangible equity per common share, which excludes goodwill and core deposit and other intangible assets and applicable deferred tax balances, was $67.29 at the end of the recent quarter, compared with $68.20 at June 30, 2017 and $69.08 at December 31, 2017.  The Company’s ratio of tangible common equity to tangible assets was 8.53% at June 30, 2018, compared with 8.95% a year earlier and 9.10% at December 31, 2017.  Reconciliations of total common shareholders’ equity and tangible common equity and total assets and tangible assets as of each of those respective dates are presented in table 2.

Shareholders’ equity reflects accumulated other comprehensive income or loss, which includes the net after-tax impact of unrealized gains or losses on investment securities classified as available for sale, unrealized losses on held-to-maturity securities for which an other-than-temporary impairment charge has been recognized, gains or losses associated with interest rate swap agreements designated as cash flow hedges, foreign currency translation adjustments and adjustments to reflect the funded status of defined benefit pension and other postretirement plans.  Net unrealized losses on investment securities reflected in shareholders’ equity, net of applicable tax effect, were $198 million, or $1.38 per common share, at June 30, 2018, compared with net unrealized losses of $743,000, or $.01 per common share, at June 30, 2017 and $44 million, or $.29 per common share, at December 31, 2017.  Changes in unrealized gains and losses on investment securities are predominantly reflective of the impact of

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changes in interest rates on the values of such securities.  Information about unrealized gains and losses as of June 30, 2018 and December 31, 2017 is included in note 2 of Notes to Financial Statements.

Reflected in the carrying amount of available-for-sale investment securities at June 30, 2018 were pre-tax effect unrealized gains of $18 million on securities with an amortized cost of $1.1 billion and pre-tax effect unrealized losses of $271 million on securities with an amortized cost of $8.8 billion.  Further information concerning the Company’s valuations of available-for-sale investment securities is provided in note 11 of Notes to Financial Statements.

Each reporting period the Company reviews its investment securities for other-than-temporary impairment. For debt securities, the Company analyzes the creditworthiness of the issuer or reviews the credit performance of the underlying collateral supporting the bond. For debt securities backed by pools of loans, such as privately issued mortgage-backed securities, the Company estimates the cash flows of the underlying loan collateral using forward-looking assumptions for default rates, loss severities and prepayment speeds. Estimated collateral cash flows are then utilized to estimate bond-specific cash flows to determine the ultimate collectibility of the bond. If the present value of the cash flows indicates that the Company should not expect to recover the entire amortized cost basis of a bond or if the Company intends to sell the bond or it more likely than not will be required to sell the bond before recovery of its amortized cost basis, an other-than-temporary impairment loss is recognized. If an other-than-temporary impairment loss is deemed to have occurred, the investment security’s cost basis is adjusted, as appropriate for the circumstances.

As of June 30, 2018, based on a review of each of the securities in the investment securities portfolio, the Company concluded that the declines in the values of any securities containing an unrealized loss were temporary and that any other-than-temporary impairment charges were not appropriate.  As of June 30, 2018, the Company did not intend to sell nor is it anticipated that it would be required to sell any of its impaired securities, that is, where fair value is less than the cost basis of the security. The Company intends to continue to closely monitor the performance of its securities because changes in their underlying credit performance or other events could cause the cost basis of those securities to become other-than-temporarily impaired. However, because the unrealized losses on available-for-sale investment securities have generally already been reflected in the financial statement values for investment securities and shareholders’ equity, any recognition of an other-than-temporary decline in value of those investment securities would not have a material effect on the Company’s consolidated financial condition. Any other-than-temporary impairment charge related to held-to-maturity securities would result in reductions in the financial statement values for investment securities and shareholders’ equity. Additional information concerning fair value measurements and the Company’s approach to the classification of such measurements is included in note 11 of the Notes to Financial Statements.

The Company assessed impairment losses on privately issued mortgage-backed securities in the held-to-maturity portfolio by performing internal modeling to estimate bond-specific cash flows considering recent performance of the mortgage loan collateral and utilizing assumptions about future defaults and loss severity. These bond-specific cash flows also reflect the placement of the bond in the overall securitization structure and the remaining subordination levels.  In total, at June 30, 2018 and December 31, 2017, the Company had in its held-to-maturity portfolio privately issued mortgage-backed securities with an amortized cost basis of $123 million and $136 million, respectively, and a fair value of $111 million at each of those dates.  At June 30, 2018, 84% of the mortgage-backed securities were in the most senior tranche of the securitization structure with 19% being independently rated as investment grade.  The mortgage-backed securities are generally collateralized by residential and small-balance commercial real estate loans originated between 2004 and 2008 and had a weighted-average credit enhancement of 18% at June 30, 2018, calculated by dividing the remaining unpaid principal balance of bonds subordinate to the bonds owned by the Company plus any overcollateralization remaining in the securitization structure by the remaining unpaid principal balance of all bonds in the securitization structure. The weighted-average default percentage and loss severity assumptions utilized in the Company’s internal modeling were 33% and 72% respectively. Given the securitization structure, some of the bonds held by the Company may defer interest payments in certain circumstances, but after considering the repayment structure and estimated future collateral cash flows of

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each individual senior and subordinate tranche bond, the Company has concluded that as of June 30, 2018, those privately issued mortgage-backed securities were not other-than-temporarily impaired.  Nevertheless, it is possible that adverse changes in the estimated future performance of mortgage loan collateral underlying such securities could impact the Company’s conclusions.

Adjustments to reflect the funded status of defined benefit pension and other postretirement plans, net of applicable tax effect, reduced accumulated other comprehensive income by $290 million, or $2.01 per common share, at June 30, 2018, $265 million, or $1.73 per common share, at June 30, 2017 and $305 million, or $2.03 per common share, at December 31, 2017.

On February 5, 2018, M&T received notice of non-objection from the Federal Reserve to repurchase an additional $745 million of shares of its common stock by June 30, 2018.  This amount was in addition to the previously announced $900 million of common stock authorized for repurchase, which was filed with the Federal Reserve in the 2017 Capital Plan.  The additional repurchases of up to $745 million have been made under the terms of a stock repurchase program approved by M&T’s Board of Directors on February 21, 2018.  M&T repurchased 2,608,376 shares of its common stock at a total cost of $475 million during the second quarter of 2018 and 6,391,658 for $1.2 billion during the first half of 2018.  In accordance with the revised 2016 Capital Plan, M&T repurchased 1,409,807 common shares for $225 million in the second quarter of 2017 and 4,643,003 common shares for $757 million during the first six months of 2017.

Also in accordance with the 2017 Capital Plan, during the second quarter of 2018, M&T’s Board of Directors authorized an increase in the quarterly common stock dividend to $.80 per common share in that quarter from the previous rate of $.75 per common share.  Cash dividends declared on M&T’s common stock aggregated $116 million in the recent quarter, compared with $115 million and $112 million in the quarters ended June 30, 2017 and March 31, 2018, respectively.  Common stock dividends during the six-month periods ended June 30, 2018 and 2017 were $228 million and $231 million, respectively.  Cash dividends declared on preferred stock aggregated $18 million in each of the second quarters of 2018 and 2017 and the first quarter of 2018.

On June 28, 2018, M&T announced that the Federal Reserve did not object to M&T’s revised 2018 Capital Plan.  The plan includes the repurchase of up to $1.8 billion of common shares during the four-quarter period beginning on July 1, 2018 and an increase in the quarterly common stock dividend in the third quarter of 2018 of up to $.20 per share to $1.00 per share.  M&T may also continue to pay dividends and interest on other equity and debt instruments included in regulatory capital, including preferred stock, trust preferred securities and subordinated debt that were outstanding at December 31, 2017, consistent with the contractual terms of those instruments.  Dividends are subject to declaration by M&T’s Board of Directors.  Furthermore, on July 17, 2018, M&T’s Board of Directors authorized a new stock repurchase program to repurchase up to $1.8 billion of common shares subject to all applicable regulatory reporting limitations, including those set forth in M&T’s revised 2018 Capital Plan.  During July 2018, M&T repurchased 450,000 common shares for $78 million in accordance with that program.

M&T and its subsidiary banks are required to comply with applicable capital adequacy standards established by the federal banking agencies. Pursuant to those regulations, the minimum capital ratios are as follows:

• 4.5% Common Equity Tier 1 (“CET1”) to risk-weighted assets (each as defined in the capital regulations);

• 6.0% Tier 1 capital (that is, CET1 plus Additional Tier 1 capital) to risk-weighted assets (each as defined in the capital regulations);

• 8.0% Total capital (that is, Tier 1 capital plus Tier 2 capital) to risk-weighted assets (each as defined in the capital regulations); and

• 4.0% Tier 1 capital to average consolidated assets as reported on consolidated financial statements (known as the “leverage ratio”), as defined in the capital regulations.

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In addition, capital regulations provide for the phase-in of a “capital conservation buffer” composed entirely of CET1 on top of these minimum risk-weighted asset ratios. When fully phased-in on January 1, 2019 the capital conservation buffer will be 2.5%. For 2018, the phase-in transition portion of that buffer is 1.875%.

The regulatory capital ratios of the Company and its bank subsidiaries, M&T Bank and Wilmington Trust, N.A., as of June 30, 2018 are presented in the accompanying table.

REGULATORY CAPITAL RATIOS

June 30, 2018

	M&T		M&T		Wilmington
	(Consolidated)		Bank		Trust, N.A.
Common equity Tier 1		10.52%		10.95%		63.39%
Tier 1 capital		11.79%		10.95%		63.39%
Total capital		14.28%		13.06%		63.85%
Tier 1 leverage		10.18%		9.47%		14.34%

The Company is subject to the comprehensive regulatory framework applicable to bank and financial holding companies and their subsidiaries, which includes regular examinations by a number of regulators. Regulation of financial institutions such as M&T and its subsidiaries is intended primarily for the protection of depositors, the Deposit Insurance Fund of the FDIC and the banking and financial system as a whole, and generally is not intended for the protection of shareholders, investors or creditors other than insureddepositors. Changes in laws, regulations and regulatory policies applicable to the Company’s operations can increase or decrease the cost of doing business, limit or expand permissible activities or affect the competitive environment in which the Company operates, all of which could have a material effect on the business, financial condition or results of operations of the Company and in M&T’s ability to pay dividends. For additional information concerning this comprehensive regulatory framework, refer to Part I, Item 1 of M&T’s Form 10-K for the year ended December 31, 2017.

Segment Information

The Company's reportable segments have been determined based upon its internal profitability reporting system, which is organized by strategic business unit. Financial information about the Company's segments is presented in note 13 of Notes to Financial Statements.  Each reportable segment benefited from a lower corporate Federal income tax rate in the first two quarters of 2018 due to the enactment of the Tax Act, as compared with the 2017 periods.

The Business Banking segment earned net income of $43 million in the second quarter of 2018, compared with $29 million in the second quarter of 2017 and $38 million in the first quarter of 2018.  As compared with the year-earlier quarter, the 50% rise in net income in the recent quarter primarily reflected an $11 million increase in net interest income, reflecting a widening of the net interest margin on deposits of 42 basis points, and the impact of the lower income tax rate. The recent quarter’s 14% increase in net income as compared with the first quarter of 2018 was largely due to a $7 million increase in net interest income, mainly due to a 23 basis point widening of the net interest margin on deposits. Net income recorded by the Business Banking segment totaled $81 million in the first six months of 2018, compared with $54 million in the year-earlier period.  That 50% year-over-year increase was predominantly driven by an $18 million increase in net interest income, a $7 million decline in the provision for credit losses, due to lower net charge-offs, and the lower income tax rate in 2018. The improvement in net interest income reflected a 34 basis point expansion of the net interest margin on deposits.  

The Commercial Banking segment recorded net income of $126 million during the quarter ended June 30, 2018, up from $106 million in the year-earlier quarter and $125 million in the first quarter of 2018.  The 20% increase in net income as compared with the second quarter of 2017 reflected the lower income tax rate in 2018 and a $5 million decline in the provision for credit losses, due to lower net charge-offs. Those favorable factors were

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offset, in part, by lower letter of credit and credit-related fees of $8 million, largely due to a decrease in loan syndication fees, and higher centrally-allocated operating expenses of $5 million associated with data processing, risk management and other support services provided to the Commercial Banking segment. The modest increase in the recent quarter’s net income as compared with the immediately preceding quarter was due to a $4 million increase in net interest income, reflecting a widening of the net interest margin on deposits of 28 basis points and one more day in the recent quarter offset, in part, by a $1.2 billion decrease in average outstanding deposit balances. Partially offsetting the higher net interest income were lower letter of credit and credit-related fees. Net income earned by the Commercial Banking segment totaled $252 million for the first half of 2018, up 15% from $218 million earned in the similar 2017 period. The increase was primarily the result of the reduction in the income tax rate, partially offset by a $13 million decline in letter of credit and credit-related fees, predominantly due to lower loan syndication fees, and higher allocated operating costs of $11 million.  

The Commercial Real Estate segment recorded net income of $113 million in the second quarter of 2018, compared with $87 million in the year-earlier period and $108 million in the initial 2018 quarter. Contributing to the 29% improvement in the recent quarter’s net income as compared with the year-earlier quarter were the lower income tax rate and higher mortgage banking revenues of $7 million, resulting from increased loan origination activities, and a $3 million decline in the provision for credit losses, predominantly due to lower net charge-offs. The rise in net income as compared with the first quarter of 2018 reflects a $4 million decrease in the provision for credit losses, mainly due to lower net charge-offs, and a $4 million increase in mortgage banking revenues. Partially offsetting those favorable factors was a decline in net interest income of $3 million reflecting a narrowing of the net interest margin on loans of 14 basis points. Net income for the Commercial Real Estate segment totaled $221 million and $172 million during the six-month periods ended June 30, 2018 and 2017, respectively. Contributing to that increase were the following favorable factors: the lower income tax rate in 2018; a rise in net interest income of $9 million, primarily due to a widening of the net interest margin on deposits of 51 basis points; higher mortgage banking revenues of $7 million, due predominantly to increased origination activities; and $6 million declines in each of FDIC assessments and the provision for credit losses. Those favorable factors were offset, in part, by $4 million of higher centrally-allocated expenses associated with data processing, risk management and other support services provided to the Commercial Real Estate segment and a $3 million increase in personnel-related expenses.

The Discretionary Portfolio segment contributed net income of $29 million during the three-month period ended June 30, 2018, little changed from $30 million in the year-earlier period, but up from $20 million in the first quarter of 2018.  The slight recent quarter decline as compared with the second quarter of 2017 was largely driven by a $10 million decrease in net interest income, reflecting a $2.7 billion decrease in average loan balances, and a $4 million decrease in the valuation of interest rate floor contracts in the recent quarter. Those unfavorable factors were offset by the impact of the lower income tax rate, a $4 million decrease in centrally-allocated costs associated with data processing, risk management and other support services provided to the Discretionary Portfolio segment and a $3 million decline in the provision for credit losses. The improvement in the recent quarter’s net income as compared with the first quarter of 2018 was primarily due to unrealized gains on equity securities in the recent quarter of $2 million, due predominantly to increased fair values of Fannie Mae and Freddie Mac preferred stock, compared with similar unrealized losses of $9 million in the initial 2018 quarter. Year-to-date net income for this segment totaled $49 million in 2018 and $64 million in 2017.  The factors contributing to the year-over-year decline in net income included a $26 million decrease in net interest income, reflecting lower average loan balances of $2.8 billion and a narrowing of the net interest margin on investment securities of 7 basis points, unrealized losses on equity securities of $7 million, an $8 million decline in the valuation of interest rate floor contracts and a $4 million decrease in bank owned life insurance revenues. Those unfavorable factors were partially offset by the impact of the lower income tax rate in 2018, an $8 million decline in centrally-allocated operating expenses and a $5 million decrease in costs associated with other residential real estate owned properties.

Net income from the Residential Mortgage Banking segment was $15 million in each of the two most recent quarters, compared with $14 million in the second quarter of 2017. The modest increase in the recent quarter as compared with the second 2017 quarter was mainly driven by the lower income tax rate and a decline in servicing-related costs of $4 million, partially offset by a $4 million decrease in net interest income. The Residential Mortgage

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Banking segment contributed $30 million in the first six months of 2018, up from $24 million in the corresponding 2017 period.  That improvement was driven by lower servicing-related costs (including intersegment costs) of $8 million, higher servicing revenues (including intersegment revenues) of $7 million and the lower income tax rate in 2018. Those favorable factors were offset, in part, by decreases of $8 million in each of revenues associated with mortgage origination and sales activities (including intersegment revenues) and net interest income. The decline in net interest income reflected a narrowing of the net interest margin on loans of 50 basis points.

Net income earned by the Retail Banking segment totaled $143 million in the second quarter of 2018, compared with $100 million in the year-earlier quarter and $123 million in the initial 2018 quarter. A $38 million rise in net interest income, predominantly due to the impact of a widening of the net interest margin on deposits of 52 basis points, and the lower income tax rate in 2018 were partially offset by higher centrally-allocated operating expenses of $7 million associated with data processing, risk management and other support services provided to the Retail Banking segment and increases of $2 million in each of the provision for credit losses and personnel-related expenses. The recent quarter’s 16% improvement in net income as compared with the first quarter of 2018 reflected a $24 million increase in net interest income mainly driven by a 23 basis point widening of the interest margin on deposits offset, in part, by higher advertising and promotional expenses of $2 million. Net income recorded by the Retail Banking segment totaled $266 million in the first half of 2018 and $186 million in 2017. Factors contributing to that 43% year-over-year improvement were an increase in net interest income of $64 million, reflecting a widening of the net interest margin on deposits of 45 basis points that was partially offset by a $3.3 billion decline in average outstanding deposit balances, and the impact of the lower income tax rate in 2018. Those favorable factors were partially offset by higher centrally-allocated costs of $13 million and a $6 million increase in credit card and merchant expenses.

The “All Other” category reflects other activities of the Company that are not directly attributable to the reported segments. Reflected in this category are the amortization of core deposit and other intangible assets resulting from the acquisitions of financial institutions, M&T’s share of the operating results and distributions associated with BLG, merger-related expenses resulting from acquisitions and the net impact of the Company’s allocation methodologies for internal transfers for funding charges and credits associated with the earning assets and interest-bearing liabilities of the Company’s reportable segments and the provision for credit losses. The “All Other” category also includes trust income of the Company that reflects the ICS and WAS business activities.  The various components of the “All Other” category resulted in net income totaling $23 million and $16 million for the quarters ended June 30, 2018 and 2017, respectively, compared with a net loss of $77 million in the first quarter of 2018. As compared with the year-earlier quarter, the higher recent quarter net income reflected a rise in trust income of $11 million, lower centrally-allocated costs of $13 million, and the favorable impact from the Company’s allocation methodologies for internal transfers for funding charges and credits associated with earning assets and interest-bearing liabilities of the Company’s reportable segments and the provision for credit losses. Those favorable factors were partially offset by a $16 million increase in professional and other outside services expenses and higher personnel-related expenses of $12 million. The improvement in the recent quarter as compared with the first quarter of 2018 was primarily due to a prior quarter increase of $135 million in the reserve for litigation matters to reflect the status of pre-existing litigation and a $45 million seasonal decrease in personnel-related expenses, partially offset by $23 million of income from BLG in the first quarter of 2018. The “All Other” category had a net loss of $53 million for the six months ended June 30, 2018, compared with net income of $12 million recorded in the corresponding period of 2017. The unfavorable performance in 2018 as compared with 2017 was predominantly driven by: the $135 million addition to the litigation reserve in 2018; higher professional and other outside services costs of $28 million; $19 million of increased personnel-related costs; and $11 million of higher software licensing and maintenance costs and data processing expenses. Partially offsetting those unfavorable factors were: $23 million of income from BLG in 2018; higher trust income of $22 million; lower centrally-allocated costs of $24 million; and the favorable impact from the Company’s allocation methodologies.

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Recent Accounting Developments

A discussion of recent accounting developments is included in note 16 of Notes to Financial Statements.

Forward-Looking Statements

Management’s Discussion and Analysis of Financial Condition and Results of Operations and other sections of this quarterly report contain forward-looking statements that are based on current expectations, estimates and projections about the Company’s business, management’s beliefs and assumptions made by management. Forward-looking statements are typically identified by words such as “believe,” “expect,” “anticipate,” “intend,” “target,” “estimate,” “continue,” “positions,” “prospects” or “potential,” by future conditional verbs such as “will,” “would,” “should,” “could,” or “may,” or by variations of such words or by similar expressions. These statements are not guarantees of future performance and involve certain risks, uncertainties and assumptions (“Future Factors”) which are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or forecasted in such forward-looking statements. Forward-looking statements speak only as of the date they are made and the Company assumes no duty to update forward-looking statements.

Future Factors include changes in interest rates, spreads on earning assets and interest-bearing liabilities, and interest rate sensitivity; prepayment speeds, loan originations, credit losses and market values of loans, collateral securing loans and other assets; sources of liquidity; common shares outstanding; common stock price volatility; fair value of and number of stock-based compensation awards to be issued in future periods; the impact of changes in market values on trust-related revenues; legislation and/or regulation affecting the financial services industry as a whole, and M&T and its subsidiaries individually or collectively, including tax legislation or regulation; regulatory supervision and oversight, including monetary policy and capital requirements; changes in accounting policies or procedures as may be required by the FASB or regulatory agencies; increasing price and product/service competition by competitors, including new entrants; rapid technological developments and changes; the ability to continue to introduce competitive new products and services on a timely, cost-effective basis; the mix of products/services; containing costs and expenses; governmental and public policy changes; protection and validity of intellectual property rights; reliance on large customers; technological, implementation and cost/financial risks in large, multi-year contracts; the outcome of pending and future litigation and governmental proceedings, including tax-related examinations and other matters; continued availability of financing; financial resources in the amounts, at the times and on the terms required to support M&T and its subsidiaries’ future businesses; and material differences in the actual financial results of merger, acquisition and investment activities compared with M&T’s initial expectations, including the full realization of anticipated cost savings and revenue enhancements.

These are representative of the Future Factors that could affect the outcome of the forward-looking statements. In addition, such statements could be affected by general industry and market conditions and growth rates, general economic and political conditions, either nationally or in the states in which M&T and its subsidiaries do business, including interest rate and currency exchange rate fluctuations, changes and trends in the securities markets, and other Future Factors.

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M&T BANK CORPORATION AND SUBSIDIARIES

Table 1

QUARTERLY TRENDS

	2018 Quarters						2017 Quarters
	Second			First			Fourth			Third			Second			First
Earnings and dividends
Amounts in thousands, except per share
Interest income (taxable-equivalent basis)	$	1,134,302			1,086,959			1,083,146			1,066,038			1,039,149			1,014,032
Interest expense		120,118			106,633			102,689			100,076			92,213			91,773
Net interest income		1,014,184			980,326			980,457			965,962			946,936			922,259
Less: provision for credit losses		35,000			43,000			31,000			30,000			52,000			55,000
Other income		457,414			458,696			484,053			459,429			460,816			446,845
Less: other expense		776,577			933,344			795,813			806,025			750,635			787,852
Income before income taxes		660,021			462,678			637,697			589,366			605,117			526,252
Applicable income taxes		161,464			105,259			306,287			224,615			215,328			169,326
Taxable-equivalent adjustment		5,397			4,809			9,007			8,828			8,736			7,999
Net income	$	493,160			352,610			322,403			355,923			381,053			348,927
Net income available to common shareholders-diluted	$	472,600			332,749			302,486			335,804			360,662			328,567
Per common share data
Basic earnings	$	3.26			2.24			2.01			2.22			2.36			2.13
Diluted earnings		3.26			2.23			2.01			2.21			2.35			2.12
Cash dividends	$	.80			.75			.75			.75			.75			.75
Average common shares outstanding
Basic		144,825			148,688			150,063			151,347			152,857			154,427
Diluted		144,998			148,905			150,348			151,691			153,276			154,949
Performance ratios, annualized
Return on
Average assets		1.70	%		1.22	%		1.06	%		1.18	%		1.27	%		1.15	%
Average common shareholders’ equity		13.32	%		9.15	%		8.03	%		8.89	%		9.67	%		8.89	%
Net interest margin on average earning assets (taxable-      equivalent basis)		3.83	%		3.71	%		3.56	%		3.53	%		3.45	%		3.34	%
Nonaccrual loans to total loans and leases, net of     unearned discount		.93	%		.99	%		1.00	%		.99	%		.98	%		1.04	%
Net operating (tangible) results (a)
Net operating income (in thousands)	$	497,869			357,498			326,664			360,658			385,974			354,035
Diluted net operating income per common share	$	3.29			2.26			2.04			2.24			2.38			2.15
Annualized return on
Average tangible assets		1.79	%		1.28	%		1.12	%		1.25	%		1.33	%		1.21	%
Average tangible common shareholders’ equity		19.91	%		13.51	%		11.77	%		13.03	%		14.18	%		13.05	%
Efficiency ratio (b)		52.42	%		63.98	%		54.65	%		56.00	%		52.74	%		56.93	%
Balance sheet data
In millions, except per share
Average balances
Total assets (c)	$	116,413			117,684			120,226			119,515			120,765			122,978
Total tangible assets (c)		111,775			113,041			115,584			114,872			116,117			118,326
Earning assets		106,210			107,231			109,412			108,642			109,987			112,008
Investment securities		13,856			14,467			14,808			15,443			15,913			15,999
Loans and leases, net of unearned discount		87,406			87,766			87,837			88,386			89,268			89,797
Deposits		90,195			91,119			93,469			93,134			94,201			96,300
Common shareholders’ equity (c)		14,301			14,827			15,039			15,069			15,053			15,091
Tangible common shareholders’ equity (c)		9,663			10,184			10,397			10,426			10,405			10,439
At end of quarter
Total assets (c)	$	118,426			118,623			118,593			120,402			120,897			123,223
Total tangible assets (c)		113,790			113,982			113,947			115,761			116,251			118,573
Earning assets		107,819			107,976			107,786			109,365			109,976			112,287
Investment securities		13,283			14,067			14,665			15,074			15,816			15,968
Loans and leases, net of unearned discount		87,797			87,711			87,989			87,925			89,081			89,313
Deposits		89,273			90,947			92,432			93,513			93,541			97,043
Common shareholders’ equity, net of undeclared      cumulative preferred dividends (c)		14,343			14,475			15,016			15,083			15,049			14,978
Tangible common shareholders’ equity (c)		9,707			9,834			10,370			10,442			10,403			10,328
Equity per common share	$	99.43			98.60			100.03			99.70			98.66			97.40
Tangible equity per common share	$	67.29			66.99			69.08			69.02			68.20			67.16
Market price per common share
High	$	188.80			197.37			176.62			166.85			164.03			173.72
Low		167.32			170.00			155.77			141.12			147.55			149.51
Closing		170.15			184.36			170.99			161.04			161.95			154.73

(a) Excludes amortization and balances related to goodwill and core deposit and other intangible assets and merger-related expenses which, except in the calculation of the efficiency ratio, are net of applicable income tax effects. A reconciliation of net income and net operating income appears in Table 2.

(b) Excludes impact of merger-related expenses and net securities transactions.

(c) The difference between total assets and total tangible assets, and common shareholders’ equity and tangible common shareholders’ equity, represents goodwill, core deposit and other intangible assets, net of applicable deferred tax balances. A reconciliation of such balances appears in Table 2.

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M&T BANK CORPORATION AND SUBSIDIARIES

Table 2

RECONCILIATION OF QUARTERLY GAAP TO NON-GAAP MEASURES

	2018 Quarters						2017 Quarters
	Second			First			Fourth			Third			Second			First
Income statement data (in thousands, except per share)
Net income
Net income	$	493,160			352,610			322,403			355,923			381,053			348,927
Amortization of core deposit and other intangible assets (a)		4,709			4,888			4,261			4,735			4,921			5,108
Net operating income	$	497,869			357,498			326,664			360,658			385,974			354,035
Earnings per common share
Diluted earnings per common share	$	3.26			2.23			2.01			2.21			2.35			2.12
Amortization of core deposit and other intangible assets (a)		.03			.03			.03			.03			.03			.03
Diluted net operating earnings per common share	$	3.29			2.26			2.04			2.24			2.38			2.15
Other expense
Other expense	$	776,577			933,344			795,813			806,025			750,635			787,852
Amortization of core deposit and other intangible assets		(6,388	)		(6,632	)		(7,025	)		(7,808	)		(8,113	)		(8,420	)
Noninterest operating expense	$	770,189			926,712			788,788			798,217			742,522			779,432
Efficiency ratio
Noninterest operating expense (numerator)	$	770,189			926,712			788,788			798,217			742,522			779,432
Taxable-equivalent net interest income		1,014,184			980,326			980,457			965,962			946,936			922,259
Other income		457,414			458,696			484,053			459,429			460,816			446,845
Less: Gain (loss) on bank investment securities		2,326			(9,431	)		21,296			—			(17	)		—
Denominator	$	1,469,272			1,448,453			1,443,214			1,425,391			1,407,769			1,369,104
Efficiency ratio		52.42	%		63.98	%		54.65	%		56.00	%		52.74	%		56.93	%
Balance sheet data (in millions)
Average assets
Average assets	$	116,413			117,684			120,226			119,515			120,765			122,978
Goodwill		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)
Core deposit and other intangible assets		(62	)		(68	)		(75	)		(82	)		(90	)		(98	)
Deferred taxes		17			18			26			32			35			39
Average tangible assets	$	111,775			113,041			115,584			114,872			116,117			118,326
Average common equity
Average total equity	$	15,533			16,059			16,271			16,301			16,285			16,323
Preferred stock		(1,232	)		(1,232	)		(1,232	)		(1,232	)		(1,232	)		(1,232	)
Average common equity		14,301			14,827			15,039			15,069			15,053			15,091
Goodwill		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)
Core deposit and other intangible assets		(62	)		(68	)		(75	)		(82	)		(90	)		(98	)
Deferred taxes		17			18			26			32			35			39
Average tangible common equity	$	9,663			10,184			10,397			10,426			10,405			10,439
At end of quarter
Total assets
Total assets		118,426			118,623			118,593			120,402			120,897			123,223
Goodwill		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)
Core deposit and other intangible assets		(59	)		(65	)		(72	)		(79	)		(86	)		(95	)
Deferred taxes		16			17			19			31			33			38
Total tangible assets	$	113,790			113,982			113,947			115,761			116,251			118,573
Total common equity
Total equity	$	15,578			15,710			16,251			16,318			16,284			16,213
Preferred stock		(1,232	)		(1,232	)		(1,232	)		(1,232	)		(1,232	)		(1,232	)
Undeclared dividends - cumulative preferred stock		(3	)		(3	)		(3	)		(3	)		(3	)		(3	)
Common equity, net of undeclared cumulative preferred dividends		14,343			14,475			15,016			15,083			15,049			14,978
Goodwill		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)		(4,593	)
Core deposit and other intangible assets		(59	)		(65	)		(72	)		(79	)		(86	)		(95	)
Deferred taxes		16			17			19			31			33			38
Total tangible common equity	$	9,707			9,834			10,370			10,442			10,403			10,328

(a) After any related tax effect.

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M&T BANK CORPORATION AND SUBSIDIARIES

Table 3

AVERAGE BALANCE SHEETS AND ANNUALIZED TAXABLE-EQUIVALENT RATES

	2018 Second Quarter								2018 First Quarter								2017 Fourth Quarter
	Average Balance			Interest		Average Rate			Average Balance			Interest		Average Rate			Average Balance			Interest		Average Rate
Average balance in millions; interest in thousands
Assets
Earning assets
Loans and leases, net of unearned     discount*
Commercial, financial, etc.	$	21,709		$	243,081		4.49	%		21,547			227,296		4.28	%		21,562			220,470		4.06	%
Real estate – commercial		33,687			421,705		4.95			33,652			397,713		4.73			33,138			390,752		4.61
Real estate – consumer		18,644			193,547		4.15			19,274			195,701		4.06			19,974			201,151		4.03
Consumer		13,366			171,441		5.14			13,293			163,991		5.00			13,163			162,765		4.91
Total loans and leases, net		87,406			1,029,774		4.73			87,766			984,701		4.55			87,837			975,138		4.40
Interest-bearing deposits at banks		4,890			21,869		1.79			4,941			18,677		1.53			6,680			21,981		1.31
Federal funds sold		1			4		2.23			3			17		1.85			—			2		1.78
Trading account		57			416		2.92			54			404		3.00			87			283		1.31
Investment securities**
U.S. Treasury and federal agencies		13,066			76,704		2.35			13,689			78,017		2.31			14,012			78,995		2.24
Obligations of states and political    subdivisions		20			217		4.45			24			271		4.67			30			378		5.00
Other		770			5,318		2.77			754			4,872		2.62			766			6,369		3.30
Total investment securities		13,856			82,239		2.38			14,467			83,160		2.33			14,808			85,742		2.30
Total earning assets		106,210			1,134,302		4.28			107,231			1,086,959		4.11			109,412			1,083,146		3.93
Allowance for credit losses		(1,018	)							(1,020	)							(1,019	)
Cash and due from banks		1,277								1,336								1,340
Other assets		9,944								10,137								10,493
Total assets	$	116,413								117,684								120,226
Liabilities and shareholders’ equity
Interest-bearing liabilities
Interest-bearing deposits
Savings and interest-checking    deposits	$	52,547			48,738		.37			52,504			40,527		.31			53,436			39,286		.29
Time deposits		5,997			11,362		.76			6,320			10,936		.70			6,888			12,212		.70
Deposits at Cayman Islands office		225			542		.97			248			381		.62			215			330		.61
Total interest-bearing deposits		58,769			60,642		.41			59,072			51,844		.36			60,539			51,828		.34
Short-term borrowings		353			1,383		1.57			280			883		1.28			178			363		.81
Long-term borrowings		8,480			58,093		2.75			8,606			53,906		2.54			8,464			50,498		2.37
Total interest-bearing liabilities		67,602			120,118		.71			67,958			106,633		.64			69,181			102,689		.59
Noninterest-bearing deposits		31,426								32,047								32,930
Other liabilities		1,852								1,620								1,844
Total liabilities		100,880								101,625								103,955
Shareholders’ equity		15,533								16,059								16,271
Total liabilities and shareholders’ equity	$	116,413								117,684								120,226
Net interest spread							3.57								3.47								3.34
Contribution of interest-free funds							.26								.24								.22
Net interest income/margin on     earning assets				$	1,014,184		3.83	%					980,326		3.71	%					980,457		3.56	%

* Includes nonaccrual loans.

** Includes available-for-sale securities at amortized cost.

(continued)

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M&T BANK CORPORATION AND SUBSIDIARIES

Table 3 (continued)

AVERAGE BALANCE SHEETS AND ANNUALIZED TAXABLE-EQUIVALENT RATES (continued)

	2017 Third Quarter								2017 Second Quarter
	Average Balance			Interest		Average Rate			Average Balance			Interest		Average Rate
Average balance in millions; interest in thousands
Assets
Earning assets
Loans and leases, net of unearned     discount*
Commercial, financial, etc.	$	21,734		$	217,953		3.98	%		22,350			213,840		3.84	%
Real estate – commercial		33,257			382,352		4.50			33,214			361,313		4.30
Real estate – consumer		20,609			204,008		3.96			21,318			210,152		3.94
Consumer		12,786			157,721		4.89			12,386			147,597		4.78
Total loans and leases, net		88,386			962,034		4.32			89,268			932,902		4.19
Interest-bearing deposits at banks		4,740			14,970		1.25			4,741			12,213		1.03
Federal funds sold		—			1		1.58			1			3		1.44
Trading account		73			351		1.92			64			240		1.50
Investment securities**
U.S. Treasury and federal agencies		14,632			81,707		2.22			15,060			87,171		2.32
Obligations of states and political subdivisions		37			442		4.69			46			553		4.86
Other		774			6,533		3.35			807			6,067		3.02
Total investment securities		15,443			88,682		2.28			15,913			93,791		2.36
Total earning assets		108,642			1,066,038		3.89			109,987			1,039,149		3.79
Allowance for credit losses		(1,014	)							(1,011	)
Cash and due from banks		1,297								1,257
Other assets		10,590								10,532
Total assets	$	119,515								120,765
Liabilities and shareholders’ equity
Interest-bearing liabilities
Interest-bearing deposits
Savings and interest-checking deposits	$	53,287			37,714		.28			53,611			30,543		.23
Time deposits		7,673			13,992		.72			8,559			16,303		.76
Deposits at Cayman Islands office		169			310		.73			163			281		.69
Total interest-bearing deposits		61,129			52,016		.34			62,333			47,127		.30
Short-term borrowings		244			554		.90			212			378		.71
Long-term borrowings		8,033			47,506		2.35			8,292			44,708		2.16
Total interest-bearing liabilities		69,406			100,076		.57			70,837			92,213		.52
Noninterest-bearing deposits		32,005								31,868
Other liabilities		1,803								1,775
Total liabilities		103,214								104,480
Shareholders’ equity		16,301								16,285
Total liabilities and shareholders’ equity	$	119,515								120,765
Net interest spread							3.32								3.27
Contribution of interest-free funds							.21								.18
Net interest income/margin on earning assets				$	965,962		3.53	%					946,936		3.45	%

* Includes nonaccrual loans.

** Includes available-for-sale securities at amortized cost.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Incorporated by reference to the discussion contained under the caption “Taxable-equivalent Net Interest Income” in Part I, Item 2, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Item 4. Controls and Procedures.

(a) Evaluation of disclosure controls and procedures. Based upon their evaluation of the effectiveness of M&T’s disclosure controls and procedures (as defined in Exchange Act rules 13a-15(e) and 15d-15(e)), René F. Jones, Chairman of the Board and Chief Executive Officer, and Darren J. King, Executive Vice President and Chief Financial Officer, concluded that M&T’s disclosure controls and procedures were effective as of June 30, 2018.

(b) Changes in internal control over financial reporting. M&T regularly assesses the adequacy of its internal control over financial reporting and enhances its controls in response to internal control assessments and internal and external audit and regulatory recommendations. No changes in internal control over financial reporting have been identified in connection with the evaluation of disclosure controls and procedures during the quarter ended June 30, 2018 that have materially affected, or are reasonably likely to materially affect, M&T’s internal control over financial reporting.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings.

M&T and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings and other matters in which claims for monetary damages are asserted. On an on-going basis management, after consultation with legal counsel, assesses the Company’s liabilities and contingencies in connection with such proceedings. For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not currently estimable. Although not considered probable, the range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, was between $0 and $50 million. Although the Company does not believe that the outcome of pending litigations will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

Wilmington Trust Corporation Investigative and Litigation Matters

M&T’s Wilmington Trust Corporation subsidiary is the subject of certain litigation arising from actions undertaken by Wilmington Trust Corporation prior to M&T’s acquisition of Wilmington Trust Corporation and its subsidiaries, as set forth below.

 In Re Wilmington Trust Securities Litigation (U.S. District Court, District of Delaware, Case No. 10-CV-0990-SLR): Beginning on November 18, 2010, a series of parties, purporting to be class representatives, commenced a putative class action lawsuit against Wilmington Trust Corporation, alleging that Wilmington Trust Corporation’s financial reporting and securities filings were in violation of securities laws. The cases were consolidated. Wilmington Trust Corporation moved to dismiss. The Court issued an order denying Wilmington Trust Corporation’s motion to dismiss on March 20, 2014. Plaintiffs’ motion for class certification was granted on September 3, 2015.  Fact discovery was stayed by Court order during extended periods of this litigation. On December 19, 2016, the Court issued an order lifting the existing stay in its entirety.  Fact discovery was completed on or about August 15, 2017. On December 12, 2017, the Court issued an order extending certain pre-trial deadlines, pushing all dates off until after the completion of the criminal trial involving certain individual witnesses. Expert

- 84 -

discovery was ordered to be completed by July 31, 2018 and summary judgment motions briefed by October 31, 2018.

In April 2018, the parties reached an agreement in principle and a settlement agreement was executed and filed with the court for approval during the second quarter of 2018.  The proposed settlement was preliminarily approved by the court in July 2018.  The final settlement hearing is scheduled to occur in the fourth quarter of 2018.  The settlement amount of $200 million is within the Company’s reserve for litigation matters as of June 30, 2018.

Due to their complex nature, it is difficult to estimate when litigation or investigatory matters may be resolved. As set forth in the introductory paragraph to this Item 1 — Legal Proceedings, losses from current litigation and regulatory matters which the Company is subject to that are not currently considered probable are within a range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, and are included in the range of reasonably possible losses set forth above.

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Item 1A. Risk Factors.

There have been no material changes in risk factors relating to M&T to those disclosed in response to Item 1A. to Part I of Form 10-K for the year ended December 31, 2017.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

(a) – (b) Not applicable.

(c)

	Issuer Purchases of Equity Securities
Period	(a)Total Number of Shares (or Units) Purchased (1)		(b)Average Price Paid per Share (or Unit)		(c)Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs		(d)Maximum Number (or Approximate Dollar Value) of Shares (or Units) that may yet be Purchased Under the Plans or Programs (2)
April 1 - April 30, 2018		1,595,144	$	182.48		1,595,000	$	184,041,000
May 1 - May 31, 2018		1,013,768		181.61		1,013,376		—
June 1 - June 30, 2018		—		—		—		—
Total		2,608,912	$	182.14		2,608,376

(1) The total number of shares purchased during the periods indicated includes shares purchased as part of publicly announced programs and shares deemed to have been received from employees who exercised stock options by attesting to previously acquired common shares in satisfaction of the exercise price or shares received from employees upon the vesting of restricted stock awards in satisfaction of applicable tax withholding obligations, as is permitted under M&T’s stock-based compensation plans.

(2) On July 17, 2018, M&T announced a program to purchase up to $1.8 billion of its common stock through June 30, 2019.

On June 28, 2018, M&T announced that it had received a non-objection from the Federal Reserve to M&T’s 2018 revised Capital Plan and its proposed capital actions for the four-quarter periods starting on July 1, 2018, which includes the repurchase of up to $1.8 billion of common shares.  On July 17, 2018, M&T’s Board of Dirctors authorized a new stock repurchase program to repurchase up to $1.8 billion of shares of its common stock following all applicable regulatory limitations including those set forth in M&T’s 2018 Capital Plan.  

Item 3. Defaults Upon Senior Securities.

(Not applicable.)

Item 4. Mine Safety Disclosures.

(None.)

Item 5. Other Information.

(None.)

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Item 6. Exhibits.

The following exhibits are filed as a part of this report.

Exhibit No.
31.1	Certification of Chief Executive Officer under Section 302 of the Sarbanes-Oxley Act of 2002. Filed herewith.
31.2	Certification of Chief Financial Officer under Section 302 of the Sarbanes-Oxley Act of 2002. Filed herewith.
32.1	Certification of Chief Executive Officer under 18 U.S.C. §1350 pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Filed herewith.
32.2	Certification of Chief Financial Officer under 18 U.S.C. §1350 pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Filed herewith.
101.INS	XBRL Instance Document. Filed herewith.
101.SCH	XBRL Taxonomy Extension Schema. Filed herewith.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase. Filed herewith.
101.LAB	XBRL Taxonomy Extension Label Linkbase. Filed herewith.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase. Filed herewith.
101.DEF	XBRL Taxonomy Definition Linkbase. Filed herewith.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	M&T BANK CORPORATION
Date: August 2, 2018	By:	/s/ Darren J. King
		Darren J. King
		Executive Vice President and Chief Financial Officer

- 87 -

EX-31.1

EXHIBIT 31.1

CERTIFICATIONS

I, René F. Jones, certify that:

1. I have reviewed this quarterly report on Form 10-Q of M&T Bank Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 2, 2018

By:	/s/ René F. Jones
	René F. Jones
	Chairman of the Board and
	Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATIONS

I, Darren J. King, certify that:

1. I have reviewed this quarterly report on Form 10-Q of M&T Bank Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 2, 2018

By:	/s/ Darren J. King
	Darren J. King
	Executive Vice President
	and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER UNDER 18 U.S.C. §1350

I, René F. Jones, Chairman of the Board and Chief Executive Officer of M&T Bank Corporation, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1) the Quarterly Report on Form 10-Q of M&T Bank Corporation for the quarterly period ended June 30, 2018 (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of M&T Bank Corporation.

The foregoing certification is being furnished solely pursuant to 18 U.S.C. §1350 and is not being filed as part of the Report or as a separate disclosure document.

/s/ René F. Jones  

René F. Jones

August 2, 2018

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to M&T Bank Corporation and will be retained by M&T Bank Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER UNDER 18 U.S.C. §1350

I, Darren J. King, Executive Vice President and Chief Financial Officer of M&T Bank Corporation, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1) the Quarterly Report on Form 10-Q of M&T Bank Corporation for the quarterly period ended June 30, 2018 (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of M&T Bank Corporation.

The foregoing certification is being furnished solely pursuant to 18 U.S.C. §1350 and is not being filed as part of the Report or as a separate disclosure document.

/s/ Darren J. King

Darren J. King

August 2, 2018

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to M&T Bank Corporation and will be retained by M&T Bank Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 27, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Trading Symbol	MTB
Entity Registrant Name	M&T BANK CORP
Entity Central Index Key	0000036270
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		143,790,862

XML

Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 1,367,594	$ 1,420,888
Interest-bearing deposits at banks	6,669,985	5,078,903
Federal funds sold	1,500
Trading account	148,303	132,909
Investment securities (includes pledged securities that can be sold or repledged of $473,505 at June 30, 2018; $487,151 at December 31, 2017)
Available for sale (cost: $9,912,160 at June 30, 2018; $10,938,796 at December 31, 2017)	9,658,846	10,896,284
Held to maturity (fair value: $3,022,329 at June 30, 2018; $3,341,762 at December 31, 2017)	3,101,095	3,353,213
Equity and other securities (cost: $507,389 at June 30, 2018; $415,028 at December 31, 2017)	523,061	415,028
Total investment securities	13,283,002	14,664,525
Loans and leases	88,059,392	88,242,886
Unearned discount	(261,942)	(253,903)
Loans and leases, net of unearned discount	87,797,450	87,988,983
Allowance for credit losses	(1,019,248)	(1,017,198)
Loans and leases, net	86,778,202	86,971,785
Premises and equipment	637,809	646,451
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	58,569	71,589
Accrued interest and other assets	4,887,977	5,013,325
Total assets	118,426,053	118,593,487
Liabilities
Noninterest-bearing deposits	32,086,191	33,975,180
Savings and interest-checking deposits	51,107,290	51,698,008
Time deposits	5,817,680	6,580,962
Deposits at Cayman Islands office	261,427	177,996
Total deposits	89,272,588	92,432,146
Short-term borrowings	3,239,416	175,099
Accrued interest and other liabilities	1,953,848	1,593,993
Long-term borrowings	8,382,316	8,141,430
Total liabilities	102,848,168	102,342,668
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 731,500 shares at June 30, 2018 and December 31, 2017; Liquidation preference of $10,000 per share: 50,000 shares at June 30, 2018 and December 31, 2017	1,231,500	1,231,500
Common stock, $.50 par, 250,000,000 shares authorized, 159,767,147 shares issued at June 30, 2018; 159,817,518 shares issued at December 31, 2017	79,884	79,909
Common stock issuable, 24,447 shares at June 30, 2018; 27,138 shares at December 31, 2017	1,691	1,847
Additional paid-in capital	6,579,395	6,590,855
Retained earnings	10,763,638	10,164,804
Accumulated other comprehensive income (loss), net	(517,941)	(363,814)
Treasury stock — common, at cost — 15,530,445 shares at June 30, 2018; 9,733,115 shares at December 31, 2017	(2,560,282)	(1,454,282)
Total shareholders’ equity	15,577,885	16,250,819
Total liabilities and shareholders’ equity	$ 118,426,053	$ 118,593,487

XML

Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Pledged securities that can be sold or repledged	$ 473,505	$ 487,151
Investment securities, available for sale, amortized cost	9,912,160	10,938,796
Investment securities, held to maturity, fair value	3,022,329	3,341,762
Equity and other securities, cost	$ 507,389	$ 415,028
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	1,000,000	1,000,000
Common stock, par value	$ 0.50	$ 0.50
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	159,767,147	159,817,518
Common stock issuable, shares	24,447	27,138
Treasury stock, common shares	15,530,445	9,733,115
Series A And Series C [Member]
Preferred stock, shares issued	731,500	731,500
Preferred stock, shares outstanding	731,500	731,500
Preferred stock, liquidation preference per share	$ 1,000	$ 1,000
Series D Preferred Stock [Member]
Preferred stock, shares issued	50,000	50,000
Preferred stock, shares outstanding	50,000	50,000
Preferred stock, liquidation preference per share	$ 10,000	$ 10,000

XML

Consolidated Statement of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest income
Loans and leases, including fees	$ 1,024,471	$ 924,640	$ 2,004,440	$ 1,822,678
Investment securities
Fully taxable	82,019	92,996	164,871	188,120
Exempt from federal taxes	172	379	420	809
Deposits at banks	21,869	12,213	40,546	24,375
Other	374	185	778	464
Total interest income	1,128,905	1,030,413	2,211,055	2,036,446
Interest expense
Savings and interest-checking deposits	48,738	30,543	89,265	56,177
Time deposits	11,362	16,303	22,298	35,301
Deposits at Cayman Islands office	542	281	923	546
Short-term borrowings	1,383	378	2,266	594
Long-term borrowings	58,093	44,708	111,999	91,368
Total interest expense	120,118	92,213	226,751	183,986
Net interest income	1,008,787	938,200	1,984,304	1,852,460
Provision for credit losses	35,000	52,000	78,000	107,000
Net interest income after provision for credit losses	973,787	886,200	1,906,304	1,745,460
Other income
Brokerage services income	12,629	16,617	26,021	34,001
Trading account and foreign exchange gains	5,255	8,084	9,892	17,775
Gain (loss) on bank investment securities	2,326	(17)	(7,105)	(17)
Other revenues from operations	100,280	117,115	226,582	228,002
Total other income	457,414	460,816	916,110	907,661
Other expense
Salaries and employee benefits	418,537	398,054	881,965	847,795
Equipment and net occupancy	73,031	73,797	147,828	148,163
Outside data processing and software	49,712	44,575	98,141	88,876
FDIC assessments	19,560	25,353	39,840	54,180
Advertising and marketing	21,768	16,324	38,016	32,434
Printing, postage and supplies	8,719	8,957	18,038	18,665
Amortization of core deposit and other intangible assets	6,388	8,113	13,020	16,533
Other costs of operations	178,862	175,462	473,073	331,841
Total other expense	776,577	750,635	1,709,921	1,538,487
Income before taxes	654,624	596,381	1,112,493	1,114,634
Income taxes	161,464	215,328	266,723	384,654
Net income	493,160	381,053	845,770	729,980
Net income available to common shareholders
Basic	472,598	360,658	805,338	689,208
Diluted	$ 472,600	$ 360,662	$ 805,342	$ 689,217
Net income per common share
Basic	$ 3.26	$ 2.36	$ 5.49	$ 4.49
Diluted	3.26	2.35	5.48	4.47
Cash dividends per common share	$ 0.80	$ 0.75	$ 1.55	$ 1.50
Average common shares outstanding
Basic	144,825	152,857	146,746	153,638
Diluted	144,998	153,276	146,941	154,108
Mortgage Banking Revenues [Member]
Other income
Revenue from contract with customer	$ 92,499	$ 86,163	$ 179,805	$ 170,855
Service Charges on Deposit Accounts [Member]
Other income
Revenue from contract with customer	106,784	106,057	211,899	210,233
Trust Income [Member]
Other income
Revenue from contract with customer	$ 137,641	$ 126,797	$ 269,016	$ 246,812

XML

Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement Of Partners Capital [Abstract]
Net income	$ 493,160	$ 381,053	$ 845,770	$ 729,980
Other comprehensive income, net of tax and reclassification adjustments:
Net unrealized gains (losses) on investment securities	(36,733)	16,932	(137,417)	15,576
Cash flow hedges adjustments	(2,569)	(955)	(13,011)	(978)
Foreign currency translation adjustment	(2,434)	1,150	(1,144)	1,626
Defined benefit plans liability adjustments	7,038	4,359	14,298	8,331
Total other comprehensive income (loss)	(34,698)	21,486	(137,274)	24,555
Total comprehensive income	$ 458,462	$ 402,539	$ 708,496	$ 754,535

XML

Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income	$ 845,770	$ 729,980
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	78,000	107,000
Depreciation and amortization of premises and equipment	54,092	54,901
Amortization of capitalized servicing rights	24,207	27,984
Amortization of core deposit and other intangible assets	13,020	16,533
Provision for deferred income taxes	(123,980)	17,136
Asset write-downs	5,237	8,797
Net gain on sales of assets	(8,738)	(21,272)
Net change in accrued interest receivable, payable	5,759	(6,350)
Net change in other accrued income and expense	255,124	50,660
Net change in loans originated for sale	(756,003)	545,864
Net change in trading account assets and liabilities	128,754	92,054
Net cash provided by operating activities	521,242	1,623,287
Cash flows from investing activities
Proceeds from sales of investment securities Available for sale	418	512,129
Proceeds from sales of investment securities equity and other	505,841	31,016
Proceeds from maturities of investment securities Available for sale	950,071	1,151,982
Proceeds from maturities of investment securities Held to maturity	247,385	245,105
Purchases of investment securities Available for sale	(5,799)	(244,449)
Purchases of investment securities Held to maturity		(1,175,608)
Purchases of investment securities equity and other	(520,040)	(68,825)
Net decrease (increase) in loans and leases	859,071	1,134,470
Net increase in interest-bearing deposits at banks	(1,591,082)	(23,191)
Capital expenditures, net	(37,116)	(49,862)
Net decrease in loan servicing advances	262,947	104,289
Other, net	(8,708)	47,742
Net cash provided by investing activities	662,988	1,664,798
Net decrease in deposits	(3,157,898)	(1,949,877)
Net increase in short-term borrowings	3,064,317	1,532,011
Proceeds from long-term borrowings	999,594	898,200
Payments on long-term borrowings	(706,370)	(2,728,059)
Purchases of treasury stock	(1,196,062)	(756,967)
Dividends paid - common	(227,565)	(230,652)
Dividends paid - preferred	(36,260)	(36,474)
Other, net	24,220	8,662
Net cash used by financing activities	(1,236,024)	(3,263,156)
Net increase (decrease) in cash, cash equivalents and restricted cash	(51,794)	24,929
Cash, cash equivalents and restricted cash at beginning of period	1,420,888	1,320,549
Cash, cash equivalents and restricted cash at end of period	1,369,094	1,345,478
Supplemental disclosure of cash flow information
Interest received during the period	2,210,063	2,038,009
Interest paid during the period	218,731	199,621
Income taxes paid during the period	175,619	321,106
Supplemental schedule of noncash investing and financing activities
Real estate acquired in settlement of loans	36,418	57,202
Securitization of residential mortgage loans allocated to Available-for-sale investment securities	10,303	10,025
Securitization of residential mortgage loans allocated to capitalized servicing rights	$ 150	$ 106

XML

Consolidated Statement of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Common Stock Issuable [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Series A Warrants [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss), Net [Member]	Treasury Stock [Member]	Treasury Stock [Member] Series A Warrants [Member]
Beginning balance at Dec. 31, 2016	$ 16,486,622	$ 1,231,500	$ 79,973	$ 2,145	$ 6,676,948		$ 9,222,488	$ (294,636)	$ (431,796)
Total comprehensive income	754,535						729,980	24,555
Preferred stock cash dividends	(36,474)						(36,474)
Exercise of stock warrants into common stock						$ (10,443)				$ 10,443
Purchases of treasury stock	(756,967)								(756,967)
Stock-based compensation plans:
Compensation expense, net	(2,521)		(62)		(58,749)				56,290
Exercises of stock options, net	57,074				(5,354)				62,428
Stock purchase plan	10,831				2,563				8,268
Directors’ stock plan	965				173				792
Deferred compensation plans, net, including dividend equivalents	(55)			(205)	(208)		(43)		401
Common stock cash dividends	(230,473)						(230,473)
Ending balance at Jun. 30, 2017	16,283,537	1,231,500	79,911	1,940	6,604,930		9,685,478	(270,081)	(1,050,141)
Beginning balance at Dec. 31, 2017	16,250,819	1,231,500	79,909	1,847	6,590,855		10,164,804	(363,814)	(1,454,282)
Cumulative effect of change in accounting principles- equity securities	(16,853)						16,853	(16,853)
Total comprehensive income	708,496						845,770	(137,274)
Preferred stock cash dividends	(36,260)						(36,260)
Exercise of stock warrants into common stock						$ (5,123)				$ 5,123
Purchases of treasury stock	(1,196,062)								(1,196,062)
Stock-based compensation plans:
Compensation expense, net	15,446		(25)		(6,194)				21,665
Exercises of stock options, net	50,671				(2,402)				53,073
Stock purchase plan	11,124				2,358				8,766
Directors’ stock plan	1,192				149				1,043
Deferred compensation plans, net, including dividend equivalents	(49)			(156)	(248)		(37)		392
Common stock cash dividends	(227,492)						(227,492)
Ending balance at Jun. 30, 2018	$ 15,577,885	$ 1,231,500	$ 79,884	$ 1,691	$ 6,579,395		$ 10,763,638	$ (517,941)	$ (2,560,282)

XML

Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares shares in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Common stock per share dividend amount	$ 1.55	$ 1.50
Retained Earnings [Member]
Common stock per share dividend amount	$ 1.55	$ 1.50
Series A Warrants [Member] | Treasury Stock [Member]
Exercise of warrants into shares of common stock	54,226	146,157
Exercise of warrants into shares of common stock	32,668	79,470

XML

Significant accounting policies

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Significant accounting policies

1. Significant accounting policies

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.

XML

Investment securities

6 Months Ended

Jun. 30, 2018

Investments Debt And Equity Securities [Abstract]

Investment securities

2. Investment securities

On January 1, 2018, the Company adopted amended guidance requiring equity investments with readily determinable fair values to be measured at fair value with changes in fair value recognized in the consolidated statement of income.  This amended guidance excludes equity method investments, investments in consolidated subsidiaries, exchange membership ownership interests, and Federal Home Loan Bank of New York and Federal Reserve Bank of New York capital stock.  Upon adoption the Company reclassified $17 million, after-tax effect, from accumulated other comprehensive income to retained earnings, representing the difference between fair value and the cost basis of equity investments with readily determinable fair values at January 1, 2018. Net unrealized gains recorded as gain (loss) on bank investment securities in the consolidated statement of income during the three months ended June 30, 2018 were $2 million and net unrealized losses during the six months ended June 30, 2018 were $7 million. The amortized cost and estimated fair value of investment securities were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
June 30, 2018
Investment securities available for sale:
U.S. Treasury and federal agencies	$	1,726,242		4		18,425	$	1,707,821
Obligations of states and political subdivisions		1,914		12		1		1,925
Mortgage-backed securities:
Government issued or guaranteed		8,046,603		15,521		244,825		7,817,299
Privately issued		26		—		2		24
Other debt securities		137,375		2,225		7,823		131,777
		9,912,160		17,762		271,076		9,658,846
Investment securities held to maturity:
Obligations of states and political subdivisions		13,547		57		20		13,584
Mortgage-backed securities:
Government issued or guaranteed		2,960,045		4,539		71,183		2,893,401
Privately issued		122,906		11,451		23,610		110,747
Other debt securities		4,597		—		—		4,597
		3,101,095		16,047		94,813		3,022,329
Total debt securities	$	13,013,255		33,809		365,889	$	12,681,175
Equity and other securities:
Readily marketable equity — at fair value		70,810		16,527		855		86,482
Other — at cost		436,579		—		—		436,579
Total equity and other securities	$	507,389		16,527		855	$	523,061

 2. Investment securities, continued

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
December 31, 2017
Investment securities available for sale:
U.S. Treasury and federal agencies	$	1,965,665		—		18,178	$	1,947,487
Obligations of states and political subdivisions		2,555		36		2		2,589
Mortgage-backed securities:
Government issued or guaranteed		8,755,482		59,497		98,587		8,716,392
Privately issued		28		—		—		28
Other debt securities		136,905		2,402		10,475		128,832
Equity securities		78,161		23,219		424		100,956
		10,938,796		85,154		127,666		10,896,284
Investment securities held to maturity:
Obligations of states and political subdivisions		24,562		109		49		24,622
Mortgage-backed securities:
Government issued or guaranteed		3,187,953		27,236		13,746		3,201,443
Privately issued		135,688		2,574		27,575		110,687
Other debt securities		5,010		—		—		5,010
		3,353,213		29,919		41,370		3,341,762
Other securities — at cost		415,028		—		—		415,028
Total	$	14,707,037		115,073		169,036	$	14,653,074

There were no significant gross realized gains or losses from sales of investment securities for the three-month and six-month periods ended June 30, 2018 and 2017, respectively.

At June 30, 2018, the amortized cost and estimated fair value of debt securities by contractual maturity were as follows:

	Amortized Cost		Estimated Fair Value
	(In thousands)
Debt securities available for sale:
Due in one year or less	$	1,297,040		1,286,504
Due after one year through five years		436,548		428,617
Due after five years through ten years		96,521		95,992
Due after ten years		35,422		30,410
		1,865,531		1,841,523
Mortgage-backed securities available for sale		8,046,629		7,817,323
	$	9,912,160		9,658,846
Debt securities held to maturity:
Due in one year or less	$	7,630		7,633
Due after one year through five years		5,917		5,951
Due after ten years		4,597		4,597
		18,144		18,181
Mortgage-backed securities held to maturity		3,082,951		3,004,148
	$	3,101,095		3,022,329

2. Investment securities, continued

A summary of investment securities that as of June 30, 2018 and December 31, 2017 had been in a continuous unrealized loss position for less than twelve months and those that had been in a continuous unrealized loss position for twelve months or longer follows:

	Less Than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
June 30, 2018
Investment securities available for sale:
U.S. Treasury and federal agencies	$	164,931		(1,622	)		1,539,796		(16,803	)
Obligations of states and political subdivisions		—		—			375		(1	)
Mortgage-backed securities:
Government issued or guaranteed		3,872,321		(91,083	)		2,907,972		(153,742	)
Privately issued		8		(2	)		—		—
Other debt securities		4,323		(94	)		63,902		(7,729	)
		4,041,583		(92,801	)		4,512,045		(178,275	)
Investment securities held to maturity:
Obligations of states and political subdivisions		—		—			4,218		(20	)
Mortgage-backed securities:
Government issued or guaranteed		2,252,672		(58,405	)		250,341		(12,778	)
Privately issued		—		—			53,579		(23,610	)
		2,252,672		(58,405	)		308,138		(36,408	)
Total	$	6,294,255		(151,206	)		4,820,183		(214,683	)
December 31, 2017
Investment securities available for sale:
U.S. Treasury and federal agencies	$	278,132		(1,761	)		1,669,355		(16,417	)
Obligations of states and political subdivisions		—		—			474		(2	)
Mortgage-backed securities:
Government issued or guaranteed		2,106,142		(13,695	)		3,138,841		(84,892	)
Other debt securities		3,067		(26	)		61,159		(10,449	)
Equity securities (a)		—		—			18,162		(424	)
		2,387,341		(15,482	)		4,887,991		(112,184	)
Investment securities held to maturity:
Obligations of states and political subdivisions		2,954		(4	)		6,110		(45	)
Mortgage-backed securities:
Government issued or guaranteed		1,331,759		(7,036	)		265,695		(6,710	)
Privately issued		5,061		(1,216	)		55,255		(26,359	)
		1,339,774		(8,256	)		327,060		(33,114	)
Total	$	3,727,115		(23,738	)		5,215,051		(145,298	)

(a) Beginning January 1, 2018, equity securities with readily determinable fair values are required to be measured at fair value with changes in fair value recognized in the consolidated statement of income. As a result, subsequent to December 31, 2017 disclosing the time period for which these equity securities had been in a continuous unrealized loss position is no longer relevant.

2. Investment securities, continued

The Company owned 1,487 individual debt securities with aggregate gross unrealized losses of $366 million at June 30, 2018. Based on a review of each of the securities in the investment securities portfolio at June 30, 2018, the Company concluded that it expected to recover the amortized cost basis of its investment.  As of June 30, 2018, the Company does not intend to sell nor is it anticipated that it would be required to sell any of its impaired investment securities at a loss.  At June 30, 2018, the Company has not identified events or changes in circumstances which may have a significant adverse effect on the fair value of the $437 million of cost method equity securities.

XML

Loans and leases and the allowance for credit losses

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Loans and leases and the allowance for credit losses

3. Loans and leases and the allowance for credit losses

A summary of current, past due and nonaccrual loans as of June 30, 2018 and December 31, 2017 follows:

	Current		30-89 Days Past Due		Accruing LoansPast Due 90 Days or More (a)		Accruing Loans Acquiredat a Discount Past Due 90 days or More (b)		Purchased Impaired (c)		Nonaccrual		Total
	(In thousands)
June 30, 2018
Commercial, financial, leasing, etc.	$	21,615,676		29,906		4,210		31		3		245,031	$	21,894,857
Real estate:
Commercial		25,352,075		212,480		10,621		4,330		10,579		153,552		25,743,637
Residential builder and developer		1,628,793		8,668		—		—		547		5,212		1,643,220
Other commercial construction		6,597,814		140,490		4,000		—		1,053		7,723		6,751,080
Residential		14,456,180		425,894		200,159		8,019		244,865		215,850		15,550,967
Residential — limited documentation		2,488,340		79,179		—		—		95,418		96,808		2,759,745
Consumer:
Home equity lines and loans		4,931,331		29,589		49		6,856		—		66,690		5,034,515
Automobile		3,450,113		69,398		—		—		—		19,564		3,539,075
Other		4,807,912		30,732		3,987		28,169		—		9,554		4,880,354
Total	$	85,328,234		1,026,336		223,026		47,405		352,465		819,984	$	87,797,450
December 31, 2017
Commercial, financial, leasing, etc.	$	21,332,234		167,756		1,322		327		21		240,991	$	21,742,651
Real estate:
Commercial		24,910,381		166,305		4,444		6,016		16,815		184,982		25,288,943
Residential builder and developer		1,618,973		5,159		—		—		1,135		6,451		1,631,718
Other commercial construction		6,407,451		23,467		—		—		4,706		10,088		6,445,712
Residential		15,376,759		474,372		233,437		7,582		282,102		235,834		16,610,086
Residential — limited documentation		2,718,019		83,898		—		—		105,236		96,105		3,003,258
Consumer:
Home equity lines and loans		5,171,345		38,546		—		9,391		—		74,500		5,293,782
Automobile		3,441,371		78,511		—		—		—		23,781		3,543,663
Other		4,349,071		40,929		5,202		24,102		—		9,866		4,429,170
Total	$	85,325,604		1,078,943		244,405		47,418		410,015		882,598	$	87,988,983

(a) Excludes loans acquired at a discount.

(b) Loans acquired at a discount that were recorded at fair value at acquisition date.  This category does not include purchased impaired loans that are presented separately.

(c) Accruing loans acquired at a discount that were impaired at acquisition date and recorded at fair value.

3. Loans and leases and the allowance for credit losses, continued

One-to-four family residential mortgage loans held for sale were $283 million and $356 million at June 30, 2018 and December 31, 2017, respectively.  Commercial real estate loans held for sale were $868 million at June 30, 2018 and $22 million at December 31, 2017.

The outstanding principal balance and the carrying amount of loans acquired at a discount that were recorded at fair value at the acquisition date and included in the consolidated balance sheet were as follows:

	June 30,		December 31,
	2018		2017
	(In thousands)
Outstanding principal balance	$	1,213,758		1,394,188
Carrying amount:
Commercial, financial, leasing, etc.		27,726		31,105
Commercial real estate		183,126		228,054
Residential real estate		545,438		620,827
Consumer		107,492		123,413
	$	863,782		1,003,399

Purchased impaired loans included in the table above totaled $352 million at June 30, 2018 and $410 million at December 31, 2017, representing less than 1% of the Company’s assets as of each date.  A summary of changes in the accretable yield for loans acquired at a discount for the three months and six months ended June 30, 2018 and 2017 follows:

	Three Months Ended June 30,
	2018						2017
	Purchased			Other			Purchased			Other
	Impaired			Acquired			Impaired			Acquired
	(In thousands)
Balance at beginning of period	$	149,007			118,184		$	143,454		$	181,310
Interest income		(7,969	)		(15,394	)		(10,806	)		(20,923	)
Reclassifications from nonaccretable balance		8,350			10,998			884			1,852
Other (a)		—			3,927			—			860
Balance at end of period	$	149,388			117,715		$	133,532		$	163,099

	Six Months Ended June 30,
	2018						2017
	Purchased			Other			Purchased			Other
	Impaired			Acquired			Impaired			Acquired
	(In thousands)
Balance at beginning of period	$	157,918		$	133,162		$	154,233			201,153
Interest income		(17,788	)		(30,506	)		(21,731	)		(46,441	)
Reclassifications from nonaccretable balance		9,258			11,205			1,030			5,035
Other (a)		—			3,854			—			3,352
Balance at end of period	$	149,388		$	117,715		$	133,532			163,099

(a) Other changes in expected cash flows including changes in interest rates and prepayment assumptions.

3. Loans and leases and the allowance for credit losses, continued

Changes in the allowance for credit losses for the three months ended June 30, 2018 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	326,071			367,717			73,047			173,841			78,995		$	1,019,671
Provision for credit losses		11,250			(10,845	)		5,242			30,801			(1,448	)		35,000
Net charge-offs
Charge-offs		(14,900	)		(4,548	)		(3,966	)		(34,033	)		—			(57,447	)
Recoveries		6,409			1,437			1,800			12,378			—			22,024
Net charge-offs		(8,491	)		(3,111	)		(2,166	)		(21,655	)		—			(35,423	)
Ending balance	$	328,830			353,761			76,123			182,987			77,547		$	1,019,248

Changes in the allowance for credit losses for the three months ended June 30, 2017 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	347,760			360,010			62,012			153,172			78,476		$	1,001,430
Provision for credit losses		13,368			7,638			7,163			24,190			(359	)		52,000
Net charge-offs
Charge-offs		(25,247	)		(1,853	)		(5,899	)		(28,683	)		—			(61,682	)
Recoveries		3,433			434			2,730			9,880			—			16,477
Net charge-offs		(21,814	)		(1,419	)		(3,169	)		(18,803	)		—			(45,205	)
Ending balance	$	339,314			366,229			66,006			158,559			78,117		$	1,008,225

Changes in the allowance for credit losses for the six months ended June 30, 2018 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	328,599			374,085			65,405			170,809			78,300		$	1,017,198
Provision for credit losses		18,480			(16,070	)		15,728			60,615			(753	)		78,000
Net charge-offs
Charge-offs		(29,481	)		(5,914	)		(8,320	)		(70,484	)		—			(114,199	)
Recoveries		11,232			1,660			3,310			22,047			—			38,249
Net charge-offs		(18,249	)		(4,254	)		(5,010	)		(48,437	)		—			(75,950	)
Ending balance	$	328,830			353,761			76,123			182,987			77,547		$	1,019,248

3. Loans and leases and the allowance for credit losses, continued

Changes in the allowance for credit losses for the six months ended June 30, 2017 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(In thousands)
Beginning balance	$	330,833			362,719			61,127			156,288			78,030	$	988,997
Provision for credit losses		42,191			8,900			12,800			43,022			87		107,000
Net charge-offs
Charge-offs		(41,604	)		(7,298	)		(12,158	)		(63,186	)		—		(124,246	)
Recoveries		7,894			1,908			4,237			22,435			—		36,474
Net charge-offs		(33,710	)		(5,390	)		(7,921	)		(40,751	)		—		(87,772	)
Ending balance	$	339,314			366,229			66,006			158,559			78,117	$	1,008,225

Despite the allocation in the preceding tables, the allowance for credit losses is general in nature and is available to absorb losses from any loan or lease type.

In establishing the allowance for credit losses, the Company estimates losses attributable to specific troubled credits identified through both normal and targeted credit review processes and also estimates losses inherent in other loans and leases on a collective basis. For purposes of determining the level of the allowance for credit losses, the Company evaluates its loan and lease portfolio by loan type. The amounts of loss components in the Company’s loan and lease portfolios are determined through a loan-by-loan analysis of larger balance commercial loans and commercial real estate loans that are in nonaccrual status and by applying loss factors to groups of loan balances based on loan type and management’s classification of such loans under the Company’s loan grading system. Measurement of the specific loss components is typically based on expected future cash flows, collateral values and other factors that may impact the borrower’s ability to pay. In determining the allowance for credit losses, the Company utilizes a loan grading system which is applied to commercial and commercial real estate credits on an individual loan basis. Loan grades are assigned loss component factors that reflect the Company’s loss estimate for each group of loans and leases. Factors considered in assigning loan grades and loss component factors include borrower-specific information related to expected future cash flows and operating results, collateral values, geographic location, financial condition and performance, payment status, and other information; levels of and trends in portfolio charge-offs and recoveries; levels of and trends in portfolio delinquencies and impaired loans; changes in the risk profile of specific portfolios; trends in volume and terms of loans; effects of changes in credit concentrations; and observed trends and practices in the banking industry.

3. Loans and leases and the allowance for credit losses, continued

Information with respect to loans and leases that were considered impaired as of June 30, 2018 and December 31, 2017 and for the three-month and six-month periods ended June 30, 2018 and 2017 follows.

	June 30, 2018						December 31, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
	(In thousands)
With an allowance recorded:
Commercial, financial, leasing, etc.	$	157,228		180,016		37,589		177,250		194,257		45,488
Real estate:
Commercial		85,588		96,221		9,316		67,199		75,084		9,140
Residential builder and developer		6,085		6,465		211		5,320		5,641		308
Other commercial construction		1,829		17,670		345		4,817		20,357		647
Residential		117,111		139,966		4,068		101,724		122,602		4,000
Residential — limited documentation		76,040		91,851		4,000		77,277		92,439		3,900
Consumer:
Home equity lines and loans		48,436		53,538		8,757		48,847		53,914		8,812
Automobile		12,467		15,396		2,595		13,498		15,737		2,811
Other		3,011		6,036		614		3,220		5,872		656
		507,795		607,159		67,495		499,152		585,903		75,762
With no related allowance recorded:
Commercial, financial, leasing, etc.		112,604		139,843		—		89,126		115,327		—
Real estate:
Commercial		89,024		99,658		—		138,356		149,716		—
Residential builder and developer		4,353		4,471		—		5,057		5,296		—
Other commercial construction		6,021		9,726		—		5,456		9,130		—
Residential		12,665		17,161		—		13,574		18,980		—
Residential — limited documentation		6,831		11,853		—		9,588		16,138		—
		231,498		282,712		—		261,157		314,587		—
Total:
Commercial, financial, leasing, etc.		269,832		319,859		37,589		266,376		309,584		45,488
Real estate:
Commercial		174,612		195,879		9,316		205,555		224,800		9,140
Residential builder and developer		10,438		10,936		211		10,377		10,937		308
Other commercial construction		7,850		27,396		345		10,273		29,487		647
Residential		129,776		157,127		4,068		115,298		141,582		4,000
Residential — limited documentation		82,871		103,704		4,000		86,865		108,577		3,900
Consumer:
Home equity lines and loans		48,436		53,538		8,757		48,847		53,914		8,812
Automobile		12,467		15,396		2,595		13,498		15,737		2,811
Other		3,011		6,036		614		3,220		5,872		656
Total	$	739,293		889,871		67,495		760,309		900,490		75,762

3. Loans and leases and the allowance for credit losses, continued

	Three Months Ended June 30, 2018						Three Months Ended June 30, 2017
			Interest Income Recognized						Interest Income Recognized
	Average Recorded Investment		Total		Cash Basis		Average Recorded Investment		Total		Cash Basis
	(In thousands)
Commercial, financial, leasing, etc.	$	271,413		1,333		1,333		230,767		805		805
Real estate:
Commercial		168,224		3,811		3,811		200,005		813		813
Residential builder and developer		8,494		—		—		15,577		467		467
Other commercial construction		7,443		53		53		14,213		86		86
Residential		126,185		2,329		937		108,036		1,465		606
Residential — limited documentation		83,776		1,428		317		95,208		1,449		339
Consumer:
Home equity lines and loans		48,644		433		72		46,872		422		91
Automobile		12,636		225		14		15,506		262		21
Other		3,066		88		3		3,468		75		3
Total	$	729,881		9,700		6,540		729,652		5,844		3,231

	Six Months Ended June 30, 2018						Six Months Ended June 30, 2017
			Interest Income Recognized						Interest Income Recognized
	Average Recorded Investment		Total		Cash Basis		Average Recorded Investment		Total		Cash Basis
	(In thousands)
Commercial, financial, leasing, etc.	$	271,793		2,116		2,116		251,352		1,283		1,283
Real estate:
Commercial		175,035		6,958		6,958		191,935		1,788		1,788
Residential builder and developer		9,167		1,682		1,682		17,552		896		896
Other commercial construction		8,773		59		59		14,922		933		933
Residential		123,697		4,231		1,839		106,166		3,101		1,380
Residential — limited documentation		84,686		3,156		1,013		96,033		2,949		723
Consumer:
Home equity lines and loans		48,721		847		158		46,327		821		191
Automobile		12,881		449		29		15,931		537		40
Other		3,092		173		6		3,510		147		6
Total	$	737,845		19,671		13,860		743,728		12,455		7,240

Commercial loans and commercial real estate loans with a lower expectation of default are assigned one of ten possible “pass” loan grades and are generally ascribed lower loss factors when determining the allowance for credit losses. Loans with an elevated level of credit risk are classified as “criticized” and are ascribed a higher loss factor when determining the allowance for credit losses. Criticized loans may be classified as “nonaccrual” if the Company no longer expects to collect all amounts according to the contractual terms of the loan agreement or the loan is delinquent 90 days or more. Furthermore, criticized nonaccrual commercial loans and commercial real estate loans are considered impaired and, as a result, specific loss allowances on such loans are established within the allowance for credit losses to the extent appropriate in each individual instance.

3. Loans and leases and the allowance for credit losses, continued

The following table summarizes the loan grades applied to the various classes of the Company’s commercial loans and commercial real estate loans.

			Real Estate
	Commercial,				Residential		Other
	Financial,				Builder and		Commercial
	Leasing, etc.		Commercial		Developer		Construction
	(In thousands)
June 30, 2018
Pass	$	20,769,679		24,954,015		1,503,766		6,594,613
Criticized accrual		880,147		636,070		134,242		148,744
Criticized nonaccrual		245,031		153,552		5,212		7,723
Total	$	21,894,857		25,743,637		1,643,220		6,751,080
December 31, 2017
Pass	$	20,490,486		24,380,184		1,485,148		6,270,812
Criticized accrual		1,011,174		723,777		140,119		164,812
Criticized nonaccrual		240,991		184,982		6,451		10,088
Total	$	21,742,651		25,288,943		1,631,718		6,445,712

In determining the allowance for credit losses, residential real estate loans and consumer loans are generally evaluated collectively after considering such factors as payment performance and recent loss experience and trends, which are mainly driven by current collateral values in the market place as well as the amount of loan defaults. Loss rates on such loans are determined by reference to recent charge-off history and are evaluated (and adjusted if deemed appropriate) through consideration of other factors including near-term forecasted loss estimates developed by the Company’s credit department. In arriving at such forecasts, the Company considers the current estimated fair value of its collateral based on geographical adjustments for home price depreciation/appreciation and overall borrower repayment performance. With regard to collateral values, the realizability of such values by the Company contemplates repayment of any first lien position prior to recovering amounts on a second lien position. However, residential real estate loans and outstanding balances of home equity loans and lines of credit that are more than 150 days past due are generally evaluated for collectibility on a loan-by-loan basis giving consideration to estimated collateral values. The carrying value of residential real estate loans and home equity loans and lines of credit for which a partial charge-off has been recognized totaled $32 million and $25 million, respectively, at June 30, 2018 and $34 million and $25 million, respectively, at December 31, 2017. Residential real estate loans and home equity loans and lines of credit that were more than 150 days past due but did not require a partial charge-off because the net realizable value of the collateral exceeded the outstanding customer balance were $15 million and $30 million, respectively, at June 30, 2018 and $20 million and $32 million, respectively, at December 31, 2017.

The Company also measures additional losses for purchased impaired loans when it is probable that the Company will be unable to collect all cash flows expected at acquisition plus additional cash flows expected to be collected arising from changes in estimates after acquisition.  The determination of the allocated portion of the allowance for credit losses is very subjective.  Given that inherent subjectivity and potential imprecision involved in determining the allocated portion of the allowance for credit losses, the Company also provides an inherent unallocated portion of the allowance.  The unallocated portion of the allowance is intended to recognize probable losses that are not otherwise identifiable and includes management’s subjective determination of amounts necessary to provide for the possible use of imprecise estimates in determining the allocated portion of the allowance.  Therefore, the level of the unallocated portion of the allowance is primarily reflective of the inherent imprecision in the various calculations used in determining the allocated portion of the allowance for credit losses.  Other factors that could also lead to changes in the unallocated portion include the effects of expansion into new markets for which the Company does not have the same degree of familiarity and experience regarding portfolio performance in

3. Loans and leases and the allowance for credit losses, continued

changing market conditions, the introduction of new loan and lease product types, and other risks associated with the Company’s loan portfolio that may not be specifically identifiable.

The allocation of the allowance for credit losses summarized on the basis of the Company’s impairment methodology was as follows:

	Commercial, Financial,		Real Estate
	Leasing, etc.		Commercial		Residential		Consumer		Total
	(In thousands)
June 30, 2018
Individually evaluated for impairment	$	37,589		9,872		8,068		11,966	$	67,495
Collectively evaluated for impairment		291,241		343,889		54,999		171,021		861,150
Purchased impaired		—		—		13,056		—		13,056
Allocated	$	328,830		353,761		76,123		182,987		941,701
Unallocated										77,547
Total									$	1,019,248
December 31, 2017
Individually evaluated for impairment	$	45,488		10,095		7,900		12,279	$	75,762
Collectively evaluated for impairment		283,111		363,990		47,645		158,530		853,276
Purchased impaired		—		—		9,860		—		9,860
Allocated	$	328,599		374,085		65,405		170,809		938,898
Unallocated										78,300
Total									$	1,017,198

The recorded investment in loans and leases summarized on the basis of the Company’s impairment methodology was as follows:

	Commercial, Financial,		Real Estate
	Leasing, etc.		Commercial		Residential		Consumer		Total
	(In thousands)
June 30, 2018
Individually evaluated for impairment	$	269,832		192,900		212,647		63,914	$	739,293
Collectively evaluated  for impairment		21,625,022		33,932,858		17,757,782		13,390,030		86,705,692
Purchased impaired		3		12,179		340,283		—		352,465
Total	$	21,894,857		34,137,937		18,310,712		13,453,944	$	87,797,450
December 31, 2017
Individually evaluated for impairment	$	266,376		226,205		202,163		65,565	$	760,309
Collectively evaluated for impairment		21,476,254		33,117,512		19,023,843		13,201,050		86,818,659
Purchased impaired		21		22,656		387,338		—		410,015
Total	$	21,742,651		33,366,373		19,613,344		13,266,615	$	87,988,983

During the normal course of business, the Company modifies loans to maximize recovery efforts.  If the borrower is experiencing financial difficulty and a concession is granted, the Company considers such modifications as troubled debt restructurings and classifies those loans as either nonaccrual loans or renegotiated loans.  The types of concessions that the Company grants typically include principal deferrals and interest rate concessions, but may also include other types of concessions.

3. Loans and leases and the allowance for credit losses, continued

The table that follows summarizes the Company’s loan modification activities that were considered troubled debt restructurings for the three-month and six-month periods ended June 30, 2018 and 2017:

					Post-modification (a)
	Number		Pre- modification Recorded Investment		Principal Deferral		Interest Rate Reduction		Other		Combination of Concession Types		Total
Three Months Ended June 30, 2018	(Dollars in thousands)
Commercial, financial, leasing, etc.	47		$	41,390	$	9,673	$	29	$	6,111	$	25,021	$	40,834
Real estate:
Commercial		28		7,200		7,376		175		394		—		7,945
Residential		30		7,951		2,814		—		—		5,766		8,580
Residential — limited documentation		3		584		200		—		—		458		658
Consumer:
Home equity lines and loans		10		555		—		—		—		559		559
Automobile		19		333		321		—		—		12		333
Total		137	$	58,013	$	20,384	$	204	$	6,505	$	31,816	$	58,909
Three Months Ended June 30, 2017
Commercial, financial, leasing, etc.		63	$	65,613	$	8,172	$	—	$	5,556	$	35,232	$	48,960
Real estate:
Commercial		30		26,045		11,782		—		—		14,276		26,058
Other commercial construction		1		66		66		—		—		—		66
Residential		30		7,956		2,982		—		—		5,486		8,468
Residential — limited documentation		7		1,831		235		—		—		1,660		1,895
Consumer:
Home equity lines and loans		35		3,229		416		—		—		2,818		3,234
Automobile		22		428		380		—		—		48		428
Other		3		54		54		—		—		—		54
Total		191	$	105,222	$	24,087	$	—	$	5,556	$	59,520	$	89,163

3. Loans and leases and the allowance for credit losses, continued

					Post-modification (a)
Six Months Ended June 30, 2018	Number		Pre- modification Recorded Investment		Principal Deferral		Interest Rate Reduction		Other		Combination of Concession Types		Total
	(Dollars in thousands)
Commercial, financial, leasing, etc.		103	$	89,384	$	45,346	$	653	$	6,111	$	38,068	$	90,178
Real estate:
Commercial		48		13,980		13,200		175		394		927		14,696
Other commercial construction		1		752		746		—		—		—		746
Residential		77		20,587		9,759		—		—		12,668		22,427
Residential — limited documentation		5		879		467		—		—		576		1,043
Consumer:
Home equity lines and loans		24		1,903		4		—		—		1,907		1,911
Automobile		27		481		469		—		—		12		481
Other		2		49		49		—		—		—		49
Total		287	$	128,015	$	70,040	$	828	$	6,505	$	54,158	$	131,531
Six Months Ended June 30, 2017
Commercial, financial, leasing, etc.		113	$	77,534	$	12,561	$	—	$	6,362	$	37,960	$	56,883
Real estate:
Commercial		50		32,747		14,773		—		—		17,882		32,655
Residential builder and developer		3		12,291		—		—		—		10,879		10,879
Other commercial construction		2		168		168		—		—		—		168
Residential		71		17,336		8,575		—		—		9,841		18,416
Residential — limited documentation		13		3,209		235		—		—		3,185		3,420
Consumer:
Home equity lines and loans		60		5,731		579		—		491		4,666		5,736
Automobile		42		818		763		—		—		55		818
Other		5		80		80		—		—		—		80
Total		359	$	149,914	$	37,734	$	—	$	6,853	$	84,468	$	129,055

(a) Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.  The present value of interest rate concessions, discounted at the effective rate of the original loan, was not material.

Troubled debt restructurings are considered to be impaired loans and for purposes of establishing the allowance for credit losses are evaluated for impairment giving consideration to the impact of the modified loan terms on the present value of the loan’s expected cash flows.  Impairment of troubled debt restructurings that have subsequently defaulted may also be measured based on the loan’s observable market price or the fair value of collateral if the loan is collateral-dependent.  Charge-offs may also be recognized on troubled debt restructurings that have subsequently defaulted.  Loans that were modified as troubled debt restructurings during the twelve months ended June 30, 2018 and 2017 and for which there was a subsequent payment default during the six-month periods ended June 30, 2018 and 2017, respectively, were not material.

The amount of foreclosed residential real estate property held by the Company was $97 million and $108 million at June 30, 2018 and December 31, 2017, respectively.  There were $433 million and $497 million at June 30, 2018 and December 31, 2017, respectively, in loans secured by residential real estate that were in the process of foreclosure. Of all loans in the process of foreclosure at June 30, 2018, approximately 41% were classified as purchased impaired and 21% were government guaranteed.

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Borrowings

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Borrowings

4. Borrowings

During January 2018, M&T Bank, the principal subsidiary of M&T, issued $1.0 billion of senior notes that mature in January 2021 pursuant to a Bank Note Program, of which $650 million have a 2.625% fixed interest rate and $350 million have a variable rate paid quarterly at rates that are indexed to the three-month London Interbank Offered Rate (“LIBOR”).  In July 2018, M&T issued $750 million of senior notes that mature in July 2023, of which $500 million have a 3.55% fixed interest rate and $250 million have a variable rate paid quarterly at rates that are indexed to the three-month LIBOR.  

M&T had $521 million of fixed and variable rate junior subordinated deferrable interest debentures ("Junior Subordinated Debentures") outstanding at June 30, 2018 that are held by various trusts that were issued in connection with the issuance by those trusts of preferred capital securities ("Capital Securities") and common securities ("Common Securities").  The proceeds from the issuances of the Capital Securities and the Common Securities were used by the trusts to purchase the Junior Subordinated Debentures.  The Common Securities of each of those trusts are wholly owned by M&T and are the only class of each trust's securities possessing general voting powers.  The Capital Securities represent preferred undivided interests in the assets of the corresponding trust. Under the Federal Reserve Board’s risk-based capital guidelines, the securities are includable in M&T’s Tier 2 regulatory capital.

Holders of the Capital Securities receive preferential cumulative cash distributions unless M&T exercises its right to extend the payment of interest on the Junior Subordinated Debentures as allowed by the terms of each such debenture, in which case payment of distributions on the respective Capital Securities will be deferred for comparable periods. During an extended interest period, M&T may not pay dividends or distributions on, or repurchase, redeem or acquire any shares of its capital stock.  In general, the agreements governing the Capital Securities, in the aggregate, provide a full, irrevocable and unconditional guarantee by M&T of the payment of distributions on, the redemption of, and any liquidation distribution with respect to the Capital Securities. The obligations under such guarantee and the Capital Securities are subordinate and junior in right of payment to all senior indebtedness of M&T.

The Capital Securities will remain outstanding until the Junior Subordinated Debentures are repaid at maturity, are redeemed prior to maturity or are distributed in liquidation to the trusts. The Capital Securities are mandatorily redeemable in whole, but not in part, upon repayment at the stated maturity dates (ranging from 2027 to 2033) of the Junior Subordinated Debentures or the earlier redemption of the Junior Subordinated Debentures in whole upon the occurrence of one or more events set forth in the indentures relating to the Capital Securities, and in whole or in part at any time after an optional redemption prior to contractual maturity contemporaneously with the optional redemption of the related Junior Subordinated Debentures in whole or in part, subject to possible regulatory approval.

Also included in long-term borrowings are agreements to repurchase securities of $416 million and $422 million at June 30, 2018 and December 31, 2017, respectively.  The agreements reflect various repurchase dates through 2020, however, the contractual maturities of the underlying investment securities extend beyond such repurchase dates.  The agreements are subject to legally enforceable master netting arrangements, however, the Company has not offset any amounts related to these agreements in its consolidated financial statements.  The Company posted collateral consisting primarily of government guaranteed mortgage-backed securities of $433 million and $442 million at June 30, 2018 and December 31, 2017, respectively.

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Shareholders' equity

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Shareholders' equity

5. Shareholders' equity

M&T is authorized to issue 1,000,000 shares of preferred stock with a $1.00 par value per share.  Preferred shares outstanding rank senior to common shares both as to dividends and liquidation preference, but have no general voting rights.

Issued and outstanding preferred stock of M&T as of June 30, 2018 and December 31, 2017 is presented below:

	Shares Issued and Outstanding		Carrying Value
	(Dollars in thousands)
Series A (a)
Fixed Rate Cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		230,000	$	230,000
Series C (a)
Fixed Rate Cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		151,500	$	151,500
Series E (b)
Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		350,000	$	350,000
Series F (c)
Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock,     $10,000 liquidation preference per share		50,000	$	500,000

(a) Dividends, if declared, are paid at 6.375%.  Warrants to purchase M&T common stock at $73.71 per share issued in connection with the Series A preferred stock expire on December 23, 2018 and totaled 202,782 at June 30, 2018.

(b) Dividends, if declared, are paid semi-annually at a rate of 6.45% through February 14, 2024 and thereafter will be paid quarterly at a rate of the three-month LIBOR plus 361 basis points.  The shares are redeemable in whole or in part on or after February 15, 2024.  Notwithstanding M&T’s option to redeem the shares, if an event occurs such that the shares no longer qualify as Tier 1 capital, M&T may redeem all of the shares within 90 days following that occurrence.

(c) Dividends, if declared, are paid semi-annually at a rate of 5.125% through October 31, 2026 and thereafter will be paid quarterly at a rate of the three-month LIBOR plus 352 basis points.  The shares are redeemable in whole or in part on or after November 1, 2026.  Notwithstanding M&T’s option to redeem the shares, if an event occurs such that the shares no longer qualify as Tier 1 capital, M&T may redeem all of the shares within 90 days following that occurrence.

In addition to the Series A warrants mentioned in (a) above, a warrant to purchase 95,580 shares of M&T common stock at $517.89 per share was outstanding at June 30, 2018.  The obligation under that warrant was assumed by M&T in an acquisition and expires on December 12, 2018.

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Pension plans and other postretirement benefits

6 Months Ended

Jun. 30, 2018

Compensation And Retirement Disclosure [Abstract]

Pension plans and other postretirement benefits

6. Pension plans and other postretirement benefits

The Company provides defined benefit pension and other postretirement benefits (including health care and life insurance benefits) to qualified retired employees.  Net periodic defined benefit cost for defined benefit plans consisted of the following:

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended June 30
	2018			2017			2018			2017
	(In thousands)
Service cost	$	5,069			5,189			243		202
Interest cost on projected benefit obligation		18,548			19,943			589			778
Expected return on plan assets		(30,688	)		(27,062	)		—			—
Amortization of prior service cost (credit)		153			154			(1,189	)		(329	)
Amortization of net actuarial loss (gain)		10,796			7,831			(213	)		(469	)
Net periodic benefit cost	$	3,878			6,055			(570	)		182

	Pension Benefits						Other Postretirement Benefits
	Six Months Ended June 30
	2018			2017			2018			2017
	(In thousands)
Service cost	$	10,172			10,097			469			585
Interest cost on projected benefit obligation		37,353			39,634			1,146			1,858
Expected return on plan assets		(61,563	)		(54,262	)		—			—
Amortization of prior service cost (credit)		278			279			(2,364	)		(679	)
Amortization of net actuarial loss (gain)		21,896			14,631			(413	)		(494	)
Net periodic benefit cost	$	8,136			10,379			(1,162	)		1,270

Service cost is reflected in salaries and employee benefits expense. The other components of net periodic benefit cost are reflected in other costs of operations. Expenses incurred in connection with the Company's defined contribution pension and retirement savings plans totaled $17,194,000 and $17,623,000 for the three months ended June 30, 2018 and 2017, respectively, and $38,468,000 and $37,042,000 for the six months ended June 30, 2018 and 2017, respectively, and are included in salaries and employee benefits expense.

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Earnings per common share

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Earnings per common share

7. Earnings per common share

The computations of basic earnings per common share follow:

	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	493,160			381,053			845,770			729,980
Less: Preferred stock dividends (a)		(18,130	)		(18,237	)		(36,260	)		(36,474	)
Net income available to common equity		475,030			362,816			809,510			693,506
Less: Income attributable to unvested stock-based    compensation awards		(2,432	)		(2,158	)		(4,172	)		(4,298	)
Net income available to common shareholders	$	472,598			360,658			805,338			689,208
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation awards		145,571			153,770			147,510			154,612
Less: Unvested stock-based compensation awards		(746	)		(913	)		(764	)		(974	)
Weighted-average shares outstanding		144,825			152,857			146,746			153,638
Basic earnings per common share	$	3.26			2.36			5.49			4.49

 (a)Including impact of not as yet declared cumulative dividends.

The computations of diluted earnings per common share follow:

	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
	(In thousands, except per share)
Net income available to common equity	$	475,030			362,816			809,510			693,506
Less: Income attributable to unvested stock-based    compensation awards		(2,430	)		(2,154	)		(4,168	)		(4,289	)
Net income available to common shareholders	$	472,600			360,662			805,342			689,217
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards		145,571			153,770			147,510			154,612
Less: Unvested stock-based compensation awards		(746	)		(913	)		(764	)		(974	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		173			419			195			470
Adjusted weighted-average shares outstanding		144,998			153,276			146,941			154,108
Diluted earnings per common share	$	3.26			2.35			5.48			4.47

GAAP defines unvested share-based awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) as participating securities that shall be included in the computation of earnings per common share pursuant to the two-class method.  The Company has issued stock-based compensation awards in the form of restricted stock and restricted stock units which, in accordance with GAAP, are considered participating securities.

Stock-based compensation awards and warrants to purchase common stock of M&T representing 212,244 and 412,826 common shares during the three-month periods ended June 30, 2018 and 2017, respectively, and 224,844 and 402,367 common shares during the six-month periods ended June 30, 2018 and 2017, respectively, were not included in the computations of diluted earnings per common share because the effect on those periods would have been antidilutive.

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Comprehensive income

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Comprehensive income

8. Comprehensive income

The following tables display the components of other comprehensive income (loss) and amounts reclassified from accumulated other comprehensive income (loss) to net income:

				Investment			Defined Benefit						Total Amount				Income
				Securities (a)			Plans			Other			Before Tax				Tax			Net
				(In thousands)
Balance — January 1, 2018				$	(59,957	)		(413,168	)		(20,165	)	$	(493,290	)			129,476		$	(363,814	)
Cumulative effect of change in accounting principle — equity     securities					(22,795	)		—			—			(22,795	)			5,942			(16,853	)
Other comprehensive income before reclassifications:
Unrealized holding gains (losses), net					(187,989	)		—			—			(187,989	)			49,414			(138,575	)
Foreign currency translation adjustment					—			—			(1,448	)		(1,448	)			304			(1,144	)
Unrealized losses on cash flow hedges					—			—			(21,065	)		(21,065	)			5,538			(15,527	)
Total other comprehensive income (loss) before    reclassifications					(187,989	)		—			(22,513	)		(210,502	)			55,256			(155,246	)
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease    net income:
Amortization of unrealized holding losses on    held-to-maturity (“HTM”) securities					1,590			—			—			1,590		(c)		(418	)		1,172
Gains realized in net income					(18	)		—			—			(18	)	(d)		4			(14	)
Accretion of net gain on terminated cash    flow hedges					—			—			(56	)		(56	)	(e)		15			(41	)
Net yield adjustment from cash flow    hedges currently in effect					—			—			3,469			3,469		(e)		(912	)		2,557
Amortization of prior service credit					—			(2,086	)		—			(2,086	)	(f)		549			(1,537	)
Amortization of actuarial losses					—			21,483			—			21,483		(f)		(5,648	)		15,835
Total other comprehensive income (loss)					(186,417	)		19,397			(19,100	)		(186,120	)			48,846			(137,274	)
Balance — June 30, 2018				$	(269,169	)		(393,771	)		(39,265	)	$	(702,205	)			184,264		$	(517,941	)
	Investment Securities						Defined Benefit						Total Amount				Income
	With OTTI (b)			All Other			Plans			Other			Before Tax				Tax			Net
	(In thousands)
Balance — January 1, 2017	$	46,725			(73,785	)		(449,917	)		(8,268	)	$	(485,245	)			190,609		$	(294,636	)
Other comprehensive income before reclassifications:
Unrealized holding gains (losses), net		(13,802	)		37,728			—			—			23,926				(9,404	)		14,522
Foreign currency translation adjustment		—			—			—			2,502			2,502				(876	)		1,626
Unrealized losses on cash flow hedges		—			—			—			(441	)		(441	)			174			(267	)
Total other comprehensive income (loss) before    reclassifications		(13,802	)		37,728			—			2,061			25,987				(10,106	)		15,881
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease    net income:
Amortization of unrealized holding losses on    HTM securities		—			1,721			—			—			1,721		(c)		(677	)		1,044
(Gains) losses realized in net income		(50	)		67			—			—			17		(d)		(7	)		10
Accretion of net gain on terminated cash    flow hedges		—			—			—			(78	)		(78	)	(e)		31			(47	)
Net yield adjustment from cash flow    hedges currently in effect		—			—			—			(1,094	)		(1,094	)	(e)		430			(664	)
Amortization of prior service credit		—			—			(400	)		—			(400	)	(f)		157			(243	)
Amortization of actuarial losses		—			—			14,137			—			14,137		(f)		(5,563	)		8,574
Total other comprehensive income (loss)		(13,852	)		39,516			13,737			889			40,290				(15,735	)		24,555
Balance — June 30, 2017	$	32,873			(34,269	)		(436,180	)		(7,379	)	$	(444,955	)			174,874		$	(270,081	)

(a) Beginning January 1, 2018, equity securities with readily determinable fair values are required to be measured at fair value with changes in fair value recognized in the income statement. All investment securities with an other-than-temporary impairment charge are within scope of the adopted accounting guidance and no longer require separate presentation.

(b) Other-than-temporary impairment

(c) Included in interest income

(d) Included in gain (loss) on bank investment securities

(e) Included in interest expense

(f) Included in other costs of operations

8. Comprehensive income, continued

Accumulated other comprehensive income (loss), net consisted of the following:

	Investment			Defined Benefit
	Securities			Plans			Other			Total
	(In thousands)
Balance — December 31, 2017	$	(44,150	)		(304,546	)		(15,118	)	$	(363,814	)
Cumulative effect of change in accounting principle — equity securities		(16,853	)		—			—			(16,853	)
Net gain (loss) during period		(137,417	)		14,298			(14,155	)		(137,274	)
Balance — June 30, 2018	$	(198,420	)		(290,248	)		(29,273	)	$	(517,941	)

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Derivative financial instruments

6 Months Ended

Jun. 30, 2018

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative financial instruments

9. Derivative financial instruments

As part of managing interest rate risk, the Company enters into interest rate swap agreements to modify the repricing characteristics of certain portions of the Company’s portfolios of earning assets and interest-bearing liabilities.  The Company designates interest rate swap agreements utilized in the management of interest rate risk as either fair value hedges or cash flow hedges.  Interest rate swap agreements are generally entered into with counterparties that meet established credit standards and most contain master netting, collateral and/or settlement provisions protecting the at-risk party. Based on adherence to the Company’s credit standards and the presence of the netting, collateral or settlement provisions, the Company believes that the credit risk inherent in these contracts was not significant as of June 30, 2018.

The net effect of interest rate swap agreements was to decrease net interest income by $5 million and $4 million for the three-month and six-month  periods ended June 30, 2018, respectively, compared with increases of $7 million and $11 million for the three-month and six-month periods ended June 30, 2017, respectively.

9. Derivative financial instruments, continued

Information about interest rate swap agreements entered into for interest rate risk management purposes summarized by type of financial instrument the swap agreements were intended to hedge follows:

	Notional		Average		Weighted- Average Rate						Estimated Fair
	Amount		Maturity		Fixed			Variable			ValueGain(Loss)(a)
	(In thousands)		(In years)								(In thousands)
June 30, 2018
Fair value hedges:
Fixed rate long-term borrowings (b)	$	4,700,000		2.7		2.41	%		2.72	%	$	(185	)
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(c)		7,700,000		1.4		1.52	%		1.98	%		56
Total	$	12,400,000		1.9							$	(129	)
December 31, 2017
Fair value hedges:
Fixed rate long-term borrowings (b)	$	4,550,000		2.9		2.27	%		2.09	%	$	573
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(d)		4,850,000		2.0		1.52	%		1.36	%		66
Total	$	9,400,000		2.5							$	639

(a) Certain clearinghouse exchanges consider payments by counterparties for variation margin on derivative instruments to be settlements of those positions. The impact of such treatment at June 30, 2018 and December 31, 2017 was a reduction of the estimated fair value losses on interest rate swap agreements designated as fair value hedges of $96.1 million and $41.1 million, respectively, and on interest rate swap agreements designated as cash flow hedges of $33.9 million and $16.3 million, respectively.

(b) Under the terms of these agreements, the Company receives settlement amounts at a fixed rate and pays at a variable rate.

(c) Includes notional amount and terms of $4.85 billion of forward-starting interest rate swap agreements that will become effective in 2019 and 2020 upon maturity of a like amount of other swap agreements.

(d) Includes notional amount and terms of $2.0 billion of forward-starting interest rate swap agreements that will become effective in 2019 upon maturity of a like amount of other swap agreements.

The Company utilizes commitments to sell residential and commercial real estate loans to hedge the exposure to changes in the fair value of real estate loans held for sale.  Such commitments have generally been designated as fair value hedges. The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in fair value of certain commitments to originate real estate loans for sale.

Derivative financial instruments used for trading account purposes included interest rate contracts, foreign exchange and other option contracts, foreign exchange forward and spot contracts, and financial futures. Interest rate contracts entered into for trading account purposes had notional values of $40.3 billion and $29.9 billion at June 30, 2018 and December 31, 2017, respectively.  The notional amounts of foreign currency and other option and futures contracts entered into for trading account purposes aggregated $647 million and $530 million at June 30, 2018 and December 31, 2017, respectively.

9. Derivative financial instruments, continued

Information about the fair values of derivative instruments in the Company’s consolidated balance sheet and consolidated statement of income follows:

	Asset Derivatives				Liability Derivatives
	Fair Value				Fair Value
	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
	(In thousands)
Derivatives designated and qualifying as hedging instruments
Interest rate swap agreements (a)	$	397	$	639	$	526	$	—
Commitments to sell real estate loans (a)		3,872		734		4,696		283
		4,269		1,373		5,222		283
Derivatives not designated and qualifying as hedging instruments
Mortgage-related commitments to originate real estate loans for sale (a)		11,801		8,797		1,050		494
Commitments to sell real estate loans (a)		3,917		2,526		2,211		1,019
Trading:
Interest rate contracts (b)		72,973		74,164		274,959		132,104
Foreign exchange and other option and futures contracts (b)		8,514		5,657		6,579		5,286
		97,205		91,144		284,799		138,903
Total derivatives	$	101,474	$	92,517	$	290,021	$	139,186

(a) Asset derivatives are reported in other assets and liability derivatives are reported in other liabilities.

(b) Asset derivatives are reported in trading account assets and liability derivatives are reported in other liabilities.  The impact of variation margin payments at June 30, 2018 and December 31, 2017 was a reduction of the estimated fair value of interest rate contracts in the trading account in an asset position of $272.2 million and $136.2 million, respectively, and in a liability position of $4.0 million and $12.2 million, respectively.

	Amount of Gain (Loss) Recognized
	Three Months Ended June 30, 2018					Three Months Ended June 30, 2017
	Derivative			Hedged Item		Derivative			Hedged Item
	(In thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	(13,357	)		13,884	$	(5,795	)		5,011
Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	(2,686	)			$	831
Foreign exchange and other option and futures contracts (b)		2,365					1,568
Total	$	(321	)			$	2,399

9. Derivative financial instruments, continued

	Amount of Gain (Loss) Recognized
	Six Months Ended June 30, 2018					Six Months Ended June 30, 2017
	Derivative			Hedged item		Derivative			Hedged item
	(In thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	(55,747	)		56,254	$	(9,914	)		9,023
Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	(4,291	)			$	2,781
Foreign exchange and other option and futures contracts (b)		4,996					3,404
Total	$	705				$	6,185

(a) Effective January 1, 2018, reported as an adjustment to interest expense. Prior to 2018, reported as other revenues from operations.  

(b) Reported as trading account and foreign exchange gains.  

	Carrying Amount of the Hedged Item				Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount of the Hedged Item
	(In thousands)
	June 30,		December 31,		June 30,			December 31,
	2018		2017		2018			2017
Location in the Consolidated Balance Sheet of    the Hedged Items in Fair Value Hedges
Long-term debt	$	4,598,712	$	4,504,029	$	(96,387	)	$	(40,133	)

The amount of gain (loss) resulting from hedge ineffectiveness recognized in the consolidated statement of income associated with derivatives designated as cash flow hedges was not material during the three and six months ended June 30, 2018 and 2017.

The Company also has commitments to sell and commitments to originate residential and commercial real estate loans that are considered derivatives.  The Company designates certain of the commitments to sell real estate loans as fair value hedges of real estate loans held for sale.  The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in the fair value of certain commitments to originate real estate loans for sale.  As a result of these activities, net unrealized pre-tax gains related to hedged loans held for sale, commitments to originate loans for sale and commitments to sell loans were approximately $26 million and $16 million at June 30, 2018 and December 31, 2017, respectively.  Changes in unrealized gains and losses are included in mortgage banking revenues and, in general, are realized in subsequent periods as the related loans are sold and commitments satisfied.

The Company does not offset derivative asset and liability positions in its consolidated financial statements.  The Company’s exposure to credit risk by entering into derivative contracts is mitigated through master netting agreements and collateral posting or settlement requirements.  Master netting agreements covering interest rate and foreign exchange contracts with the same party include a right to set-off that becomes enforceable in the event of default, early termination or under other specific conditions.

9. Derivative financial instruments, continued

The aggregate fair value of derivative financial instruments in a liability position and the net liability positions with counterparties, which are subject to enforceable master netting arrangements, was $5 million and $13 million at June 30, 2018 and December 31, 2017, respectively.  The Company was required to post collateral relating to those positions of $4 million and $12 million at June 30, 2018 and December 31, 2017, respectively.   Certain of the Company’s derivative financial instruments contain provisions that require the Company to maintain specific credit ratings from credit rating agencies to avoid higher collateral posting requirements.  If the Company’s debt rating were to fall below specified ratings, the counterparties of the derivative financial instruments could demand immediate incremental collateralization on those instruments in a net liability position.  The aggregate fair value of all derivative financial instruments with such credit risk-related contingent features in a net liability position on June 30, 2018 was not significant.  If the credit risk-related contingent features had been triggered on June 30, 2018, the Company would not have been required to post any additional collateral to counterparties.

The aggregate fair value of derivative financial instruments in an asset position and the net asset positions with counterparties, which are subject to enforceable master netting arrangements, was $36 million and $13 million at June 30, 2018 and December 31, 2017, respectively.   Counterparties posted collateral relating to those positions of $37 million and $12 million at June 30, 2018 and December 31, 2017, respectively.  Trading account interest rate swap agreements entered into with customers are subject to the Company’s credit risk standards and often contain collateral provisions.

In addition to the derivative contracts noted above, the Company clears certain derivative transactions through a clearinghouse, rather than directly with counterparties. Those transactions cleared through a clearinghouse require initial margin collateral and variation margin payments depending on the contracts being in a net asset or liability position. The amount of initial margin collateral posted by the Company was $54 million and $52 million at June 30, 2018 and December 31, 2017, respectively. The fair value asset and liability amounts of derivative contracts at June 30, 2018 have been reduced by variation margin payments treated as settlements of $272 million and $134 million, respectively.  Variation margin on derivative contracts not treated as settlements continues to represent collateral posted or received by the Company.

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Variable interest entities and asset securitizations

6 Months Ended

Jun. 30, 2018

Text Block [Abstract]

Variable interest entities and asset securitizations

10. Variable interest entities and asset securitizations

The Company’s securitization activity has consisted of securitizing loans originated for sale into government issued or guaranteed mortgage-backed securities. The amounts of those securitizations during the six-month periods ended June 30, 2018 and June 30, 2017 are presented in the Company’s consolidated statement of cash flows. The Company has not recognized any losses as a result of having securitized assets.

As described in note 4, M&T has issued junior subordinated debentures payable to various trusts that have issued Capital Securities. M&T owns the common securities of those trust entities. The Company is not considered to be the primary beneficiary of those entities and, accordingly, the trusts are not included in the Company’s consolidated financial statements. At each of June 30, 2018 and December 31, 2017, the Company included the junior subordinated debentures as “long-term borrowings” in its consolidated balance sheet and recognized $23 million, in other assets for its “investment” in the common securities of the trusts that will be concomitantly repaid to M&T by the respective trust from the proceeds of M&T’s repayment of the junior subordinated debentures associated with preferred capital securities described in note 4.

The Company has invested as a limited partner in various partnerships that collectively had total assets of approximately $1.0 billion at each of June 30, 2018 and December 31, 2017. Those partnerships generally construct or acquire properties for which the investing partners are eligible to receive certain federal income tax credits in accordance with government guidelines. Such investments may also provide tax deductible losses to the partners. The partnership investments also assist the Company in achieving its community reinvestment initiatives. As a limited partner, there is no recourse to the Company by creditors of the partnerships. However, the tax credits

10. Variable interest entities and asset securitizations, continued

that result from the Company’s investments in such partnerships are generally subject to recapture should a partnership fail to comply with the respective government regulations. The Company’s maximum exposure to loss of its investments in such partnerships was $461 million, including $229 million of unfunded commitments, at June, 2018 and $420 million, including $201 million of unfunded commitments, at December 31, 2017.  Contingent commitments to provide additional capital contributions to these partnerships were not material at June 30, 2018. The Company has not provided financial or other support to the partnerships that was not contractually required.  Management currently estimates that no material losses are probable as a result of the Company’s involvement with such entities.  The Company, in its position as limited partner, does not direct the activities that most significantly impact the economic performance of the partnerships and, therefore, in accordance with the accounting provisions for variable interest entities, the partnership entities are not included in the Company’s consolidated financial statements.  The Company’s investment cost is amortized to income taxes in the consolidated statement of income as tax credits and other tax benefits resulting from deductible losses associated with the projects are received.  The Company amortized $13 million and $26 million of its investments in qualified affordable housing projects to income tax expense during the three-month and six-month periods ended June 30, 2018, respectively, and recognized $16 million and $32 million of tax credits and other tax benefits during each of those respective periods. Similarly, for the three-month and six-month periods ended June 30, 2017, the Company amortized $11 million and $24 million, respectively, of its investments in qualified affordable housing projects to income tax expense and recognized $15 million and $31 million of tax credits and other tax benefits during those respective periods.  

The Company serves as investment advisor for certain registered money-market funds.  The Company has no explicit arrangement to provide support to those funds, but may waive portions of its allowable management fees as a result of market conditions.

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Fair value measurements

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair value measurements

11. Fair value measurements

GAAP permits an entity to choose to measure eligible financial instruments and other items at fair value.  The Company has not made any fair value elections at June 30, 2018.

Pursuant to GAAP, fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A three-level hierarchy exists in GAAP for fair value measurements based upon the inputs to the valuation of an asset or liability.

• Level 1 — Valuation is based on quoted prices in active markets for identical assets and liabilities.

• Level 2 — Valuation is determined from quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar instruments in markets that are not active or by model-based techniques in which all significant inputs are observable in the market.

• Level 3 — Valuation is derived from model-based and other techniques in which at least one significant input is unobservable and which may be based on the Company's own estimates about the assumptions that market participants would use to value the asset or liability.

When available, the Company attempts to use quoted market prices in active markets to determine fair value and classifies such items as Level 1 or Level 2. If quoted market prices in active markets are not available, fair value is often determined using model-based techniques incorporating various assumptions including interest rates, prepayment speeds and credit losses. Assets and liabilities valued using model-based techniques are classified as either Level 2 or Level 3, depending on the lowest level classification of an input that is considered significant to the overall valuation. The following is a description of the valuation methodologies used for the Company's assets and liabilities that are measured on a recurring basis at estimated fair value.

11. Fair value measurements, continued

Trading account assets and liabilities

Trading account assets and liabilities consist primarily of interest rate contracts and foreign exchange contracts with customers who require such services with offsetting positions with third parties to minimize the Company's risk with respect to such transactions. The Company generally determines the fair value of its derivative trading account assets and liabilities using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2.  Mutual funds held in connection with deferred compensation and other arrangements have been classified as Level 1 valuations. Valuations of investments in municipal and other bonds can generally be obtained through reference to quoted prices in less active markets for the same or similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2.

Investment securities available for sale and equity securities

The majority of the Company's available-for-sale investment securities have been valued by reference to prices for similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2. Certain investments in mutual funds and equity securities are actively traded and, therefore, have been classified as Level 1 valuations.

Real estate loans held for sale

The Company utilizes commitments to sell real estate loans to hedge the exposure to changes in fair value of real estate loans held for sale. The carrying value of hedged real estate loans held for sale includes changes in estimated fair value during the hedge period.  Typically, the Company attempts to hedge real estate loans held for sale from the date of close through the sale date.  The fair value of hedged real estate loans held for sale is generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans with similar characteristics and, accordingly, such loans have been classified as a Level 2 valuation.

Commitments to originate real estate loans for sale and commitments to sell real estate loans

The Company enters into various commitments to originate real estate loans for sale and commitments to sell real estate loans. Such commitments are considered to be derivative financial instruments and, therefore, are carried at estimated fair value on the consolidated balance sheet. The estimated fair values of such commitments were generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans to certain government-sponsored entities and other parties. The fair valuations of commitments to sell real estate loans generally result in a Level 2 classification. The estimated fair value of commitments to originate real estate loans for sale are adjusted to reflect the Company's anticipated commitment expirations. The estimated commitment expirations are considered significant unobservable inputs contributing to the Level 3 classification of commitments to originate real estate loans for sale.  Significant unobservable inputs used in the determination of estimated fair value of commitments to originate real estate loans for sale are included in the accompanying table of significant unobservable inputs to Level 3 measurements.

Interest rate swap agreements used for interest rate risk management

The Company utilizes interest rate swap agreements as part of the management of interest rate risk to modify the repricing characteristics of certain portions of its portfolios of earning assets and interest-bearing liabilities. The Company generally determines the fair value of its interest rate swap agreements using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2. The Company has considered counterparty credit risk in the valuation of its interest rate swap agreement assets and has considered its own credit risk in the valuation of its interest rate swap agreement liabilities.

11. Fair value measurements, continued

The following tables present assets and liabilities at June 30, 2018 and December 31, 2017 measured at estimated fair value on a recurring basis:

	Fair Value Measurements		Level 1 (a)		Level 2 (a)		Level 3
	(In thousands)
June 30, 2018
Trading account assets	$	148,303	$	46,502	$	101,801	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		1,707,821		—		1,707,821		—
Obligations of states and political subdivisions		1,925		—		1,925		—
Mortgage-backed securities:
Government issued or guaranteed		7,817,299		—		7,817,299		—
Privately issued		24		—		—		24
Other debt securities		131,777		—		131,777		—
		9,658,846		—		9,658,822		24
Equity securities		86,482		65,748		20,734		—
Real estate loans held for sale		1,151,090		—		1,151,090		—
Other assets (b)		19,987		—		8,186		11,801
Total assets	$	11,064,708	$	112,250	$	10,940,633	$	11,825
Trading account liabilities	$	281,538	$	—	$	281,538	$	—
Other liabilities (b)		8,483		—		7,433		1,050
Total liabilities	$	290,021	$	—	$	288,971	$	1,050
December 31, 2017
Trading account assets	$	132,909	$	47,873	$	85,036	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		1,947,487		—		1,947,487		—
Obligations of states and political subdivisions		2,589		—		2,589		—
Mortgage-backed securities:
Government issued or guaranteed		8,716,392		—		8,716,392		—
Privately issued		28		—		—		28
Other debt securities		128,832		—		128,832		—
Equity securities		100,956		73,232		27,724		—
		10,896,284		73,232		10,823,024		28
Real estate loans held for sale		378,047		—		378,047		—
Other assets (b)		12,696		—		3,899		8,797
Total assets	$	11,419,936	$	121,105	$	11,290,006	$	8,825
Trading account liabilities	$	137,390	$	—	$	137,390	$	—
Other liabilities (b)		1,796		—		1,302		494
Total liabilities	$	139,186	$	—	$	138,692	$	494

(a) There were no significant transfers between Level 1 and Level 2 of the fair value hierarchy during the six months ended June 30, 2018 and the year ended December 31, 2017.                                        

(b) Comprised predominantly of interest rate swap agreements used for interest rate risk management (Level 2), commitments to sell real estate loans (Level 2) and commitments to originate real estate loans to be held for sale (Level 3).

11. Fair value measurements, continued

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2018 were as follows:

	Investment Securities Available for Sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance - March 31, 2018	$	27			8,760
Total gains (losses) realized/unrealized:
Included in earnings		—			20,277		(b)
Settlements		(3	)		—
Transfers out of Level 3 (a)		—			(18,286	)	(c)
Balance — June 30, 2018	$	24			10,751
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2018	$	—			10,686		(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2017 were as follows:

	Investment Securities Available for Sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance - March 31, 2017	$	41			16,202
Total gains (losses) realized/unrealized:
Included in earnings		—			19,571		(b)
Settlements		(6	)		—
Transfers out of Level 3 (a)		—			(23,348	)	(c)
Balance — June 30, 2017	$	35			12,425
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2017	$	—			10,892		(b)

11. Fair value measurements, continued

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2018 were as follows:

	Investment securities available for sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance — January 1, 2018	$	28			8,303
Total gains (losses) realized/unrealized:
Included in earnings		—			28,407		(b)
Settlements		(4	)		—
Transfers out of Level 3 (a)		—			(25,959	)	(c)
Balance — June 30, 2018	$	24			10,751
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2018	$	—			10,686		(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2017 were as follows:

	Investment securities available for sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance — January 1, 2017	$	44			7,325
Total gains (losses) realized/unrealized:
Included in earnings		—			43,511		(b)
Settlements		(9	)		—
Transfers out of Level 3 (a)		—			(38,411	)	(c)
Balance — June 30, 2017	$	35			12,425
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2017	$	—			12,372		(b)

(a) The Company’s policy for transfers between fair value levels is to recognize the transfer as of the actual date of the event or change in circumstances that caused the transfer.

(b) Reported as mortgage banking revenues in the consolidated statement of income and includes the fair value of commitment issuances and expirations.

(c) Transfers out of Level 3 consist of interest rate locks transferred to closed loans.

11. Fair value measurements, continued

The Company is required, on a nonrecurring basis, to adjust the carrying value of certain assets or provide valuation allowances related to certain assets using fair value measurements.  The more significant of those assets follow.

Loans

Loans are generally not recorded at fair value on a recurring basis. Periodically, the Company records nonrecurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectible portions of those loans. Nonrecurring adjustments also include certain impairment amounts for collateral-dependent loans when establishing the allowance for credit losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated valuation amount does not necessarily represent the fair value of the loan. Real estate collateral is typically valued using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace and the related nonrecurring fair value measurement adjustments have generally been classified as Level 2, unless significant adjustments have been made to the valuation that are not readily observable by market participants. Non-real estate collateral supporting commercial loans generally consists of business assets such as receivables, inventory and equipment.  Fair value estimations are typically determined by discounting recorded values of those assets to reflect estimated net realizable value considering specific borrower facts and circumstances and the experience of credit personnel in their dealings with similar borrower collateral liquidations.  Such discounts were generally in the range of 15% to 90% at June 30, 2018.  As these discounts are not readily observable and are considered significant, the valuations have been classified as Level 3.  Automobile collateral is typically valued by reference to independent pricing sources based on recent sales transactions of similar vehicles, and the related nonrecurring fair value measurement adjustments have been classified as Level 2.  Collateral values for other consumer installment loans are generally estimated based on historical recovery rates for similar types of loans.  As these recovery rates are not readily observable by market participants, such valuation adjustments have been classified as Level 3.  Loans subject to nonrecurring fair value measurement were $206 million at June 30, 2018 ($119 million and $87 million of which were classified as Level 2 and Level 3, respectively), $210 million at December 31, 2017 ($145 million and $65 million of which were classified as Level 2 and Level 3, respectively) and $200 million at June 30, 2017 ($118 million and $82 million of which were classified as Level 2 and Level 3, respectively).  Changes in fair value recognized for partial charge-offs of loans and loan impairment reserves on loans held by the Company on June 30, 2018 were decreases of $21 million and $45 million for the three-month and six-month periods ended June 30, 2018, respectively. Changes in fair value recognized for partial charge-offs of loans and loan impairment reserves on loans held by the Company on June 30, 2017 were decreases of $21 million and $43 million for the three-month and six-month periods ended June 30, 2017, respectively.

Assets taken in foreclosure of defaulted loans

Assets taken in foreclosure of defaulted loans are primarily comprised of commercial and residential real property and are generally measured at the lower of cost or fair value less costs to sell.  The fair value of the real property is generally determined using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace, and the related nonrecurring fair value measurement adjustments have generally been classified as Level 2.  Assets taken in foreclosure of defaulted loans subject to nonrecurring fair value measurement were $30 million and $37 million at June 30, 2018 and 2017, respectively.  Changes in fair value recognized for those foreclosed assets held by the Company were not material during the three-month and six-month periods ended June 30, 2018 and 2017.

11. Fair value measurements, continued

Significant unobservable inputs to Level 3 measurements

The following tables present quantitative information about significant unobservable inputs used in the fair value measurements for certain Level 3 assets and liabilities at June 30, 2018 and December 31, 2017:

	Fair Value		Valuation Technique	Unobservable Inputs/Assumptions		Range (Weighted- Average)
	(In thousands)
June 30, 2018
Recurring fair value measurements
Privately issued mortgage-backed    securities	$	24	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		10,751	Discounted cash flow	Commitment expirations		0%-90% (20%)
December 31, 2017
Recurring fair value measurements
Privately issued mortgage-backed    securities	$	28	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		8,303	Discounted cash flow	Commitment expirations		0%-78% (22%)

(a) Other Level 3 assets (liabilities) consist of commitments to originate real estate loans.

Sensitivity of fair value measurements to changes in unobservable inputs

An increase (decrease) in the estimate of expirations for commitments to originate real estate loans would generally result in a lower (higher) fair value measurement.  Estimated commitment expirations are derived considering loan type, changes in interest rates and remaining length of time until closing.

11. Fair value measurements, continued

Disclosures of fair value of financial instruments

The carrying amounts and estimated fair value for financial instrument assets (liabilities) are presented in the following table:

	June 30, 2018
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
	(In thousands)
Financial assets:
Cash and cash equivalents	$	1,369,094			1,369,094			1,258,614		110,480			—
Interest-bearing deposits at banks		6,669,985			6,669,985			—		6,669,985			—
Trading account assets		148,303			148,303			46,502		101,801			—
Investment securities		13,283,002			13,204,236			65,748		13,027,717			110,771
Loans and leases:
Commercial loans and leases		21,894,857			21,465,594			—		—			21,465,594
Commercial real estate loans		34,137,937			33,579,305			—		868,392			32,710,913
Residential real estate loans		18,310,712			18,110,823			—		4,128,794			13,982,029
Consumer loans		13,453,944			13,257,759			—		—			13,257,759
Allowance for credit losses		(1,019,248	)		—			—		—			—
Loans and leases, net		86,778,202			86,413,481			—		4,997,186			81,416,295
Accrued interest receivable		333,549			333,549			—		333,549			—
Financial liabilities:
Noninterest-bearing deposits	$	(32,086,191	)		(32,086,191	)		—		(32,086,191	)		—
Savings and interest-checking deposits		(51,107,290	)		(51,107,290	)		—		(51,107,290	)		—
Time deposits		(5,817,680	)		(5,865,067	)		—		(5,865,067	)		—
Deposits at Cayman Islands office		(261,427	)		(261,427	)		—		(261,427	)		—
Short-term borrowings		(3,239,416	)		(3,239,416	)		—		(3,239,416	)		—
Long-term borrowings		(8,382,316	)		(8,392,684	)		—		(8,392,684	)		—
Accrued interest payable		(87,779	)		(87,779	)		—		(87,779	)		—
Trading account liabilities		(281,538	)		(281,538	)		—		(281,538	)		—
Other financial instruments:
Commitments to originate real estate loans for sale	$	10,751			10,751			—		—			10,751
Commitments to sell real estate loans		882			882			—		882			—
Other credit-related commitments		(127,898	)		(127,898	)		—		—			(127,898	)
Interest rate swap agreements used for interest    rate risk management		(129	)		(129	)		—		(129	)		—

11. Fair value measurements, continued

	December 31, 2017
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
				(In thousands)
Financial assets:
Cash and cash equivalents	$	1,420,888			1,420,888			1,352,035		68,853		—
Interest-bearing deposits at banks		5,078,903			5,078,903			—		5,078,903		—
Trading account assets		132,909			132,909			47,873		85,036		—
Investment securities		14,664,525			14,653,074			73,232		14,469,127			110,715
Loans and leases:
Commercial loans and leases		21,742,651			21,321,282		—		—				21,321,282
Commercial real estate loans		33,366,373			32,950,724		—			22,130			32,928,594
Residential real estate loans		19,613,344			19,596,826		—			4,440,645			15,156,181
Consumer loans		13,266,615			13,161,517		—			—			13,161,517
Allowance for credit losses		(1,017,198	)		—		—			—			—
Loans and leases, net		86,971,785			87,030,349		—			4,462,775			82,567,574
Accrued interest receivable		327,170			327,170		—			327,170			—
Financial liabilities:
Noninterest-bearing deposits	$	(33,975,180	)		(33,975,180	)	—			(33,975,180	)	—
Savings and interest-checking deposits		(51,698,008	)		(51,698,008	)	—			(51,698,008	)	—
Time deposits		(6,580,962	)		(6,635,048	)	—			(6,635,048	)	—
Deposits at Cayman Islands office		(177,996	)		(177,996	)	—			(177,996	)	—
Short-term borrowings		(175,099	)		(175,099	)	—			(175,099	)	—
Long-term borrowings		(8,141,430	)		(8,193,783	)	—			(8,193,783	)	—
Accrued interest payable		(75,641	)		(75,641	)	—			(75,641	)	—
Trading account liabilities		(137,390	)		(137,390	)	—			(137,390	)	—
Other financial instruments:
Commitments to originate real estate loans for sale	$	8,303			8,303		—			—			8,303
Commitments to sell real estate loans		1,958			1,958		—			1,958		—
Other credit-related commitments		(125,281	)		(125,281	)	—			—			(125,281	)
Interest rate swap agreements used for interest    rate risk management		639			639		—			639		—

With the exception of marketable securities, certain off-balance sheet financial instruments and mortgage loans originated for sale, the Company’s financial instruments are not readily marketable and market prices do not exist. The Company, in attempting to comply with the provisions of GAAP that require disclosures of fair value of financial instruments, has not attempted to market its financial instruments to potential buyers, if any exist. Since negotiated prices in illiquid markets depend greatly upon the then present motivations of the buyer and seller, it is reasonable to assume that actual sales prices could vary widely from any estimate of fair value made without the benefit of negotiations. Additionally, changes in market interest rates can dramatically impact the value of financial instruments in a short period of time.

The Company does not believe that the estimated information presented herein is representative of the earnings power or value of the Company. The preceding analysis, which is inherently limited in depicting fair value, also does not consider any value associated with existing customer relationships nor the ability of the Company to create value through loan origination, deposit gathering or fee generating activities. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable between financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Furthermore, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.

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Commitments and contingencies

6 Months Ended

Jun. 30, 2018

Commitments And Contingencies Disclosure [Abstract]

Commitments and contingencies

12. Commitments and contingencies

In the normal course of business, various commitments and contingent liabilities are outstanding.  The following table presents the Company's significant commitments.  Certain of these commitments are not included in the Company's consolidated balance sheet.

	June 30,		December 31,
	2018		2017
	(In thousands)
Commitments to extend credit
Home equity lines of credit	$	5,474,798		5,482,622
Commercial real estate loans to be sold		323,750		194,763
Other commercial real estate		5,855,075		6,050,569
Residential real estate loans to be sold		361,034		347,113
Other residential real estate		240,020		201,426
Commercial and other		13,247,615		12,733,815
Standby letters of credit		2,410,569		2,497,844
Commercial letters of credit		55,655		46,739
Financial guarantees and indemnification contracts		3,458,625		3,434,381
Commitments to sell real estate loans		1,725,093		812,217

Commitments to extend credit are agreements to lend to customers, generally having fixed expiration dates or other termination clauses that may require payment of a fee.  Standby and commercial letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party.   Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party, whereas commercial letters of credit are issued to facilitate commerce and typically result in the commitment being funded when the underlying transaction is consummated between the customer and a third party.  The credit risk associated with commitments to extend credit and standby and commercial letters of credit is essentially the same as that involved with extending loans to customers and is subject to normal credit policies.  Collateral may be obtained based on management's assessment of the customer's creditworthiness.

Financial guarantees and indemnification contracts are oftentimes similar to standby letters of credit and include mandatory purchase agreements issued to ensure that customer obligations are fulfilled, recourse obligations associated with sold loans, and other guarantees of customer performance or compliance with designated rules and regulations.  Included in financial guarantees and indemnification contracts are loan principal amounts sold with recourse in conjunction with the Company's involvement in the Fannie Mae Delegated Underwriting and Servicing program.  The Company's maximum credit risk for recourse associated with loans sold under this program totaled approximately $3.3 billion at each of June 30, 2018 and December 31, 2017.

Since many loan commitments, standby letters of credit, and guarantees and indemnification contracts expire without being funded in whole or in part, the contract amounts are not necessarily indicative of future cash flows.

The Company utilizes commitments to sell real estate loans to hedge exposure to changes in the fair value of real estate loans held for sale.  Such commitments are considered derivatives and along with commitments to originate real estate loans to be held for sale are generally recorded in the consolidated balance sheet at estimated fair market value.

The Company also has commitments under long-term operating leases.

The Company is contractually obligated to repurchase previously sold residential real estate loans that do not ultimately meet investor sale criteria related to underwriting procedures or loan documentation.  When required to do so, the Company may reimburse loan purchasers for losses incurred or may repurchase certain loans.  The Company reduces residential mortgage banking revenues by an estimate for losses related to its obligations to loan purchasers.  

12. Commitments and contingencies, continued

The amount of those charges is based on the volume of loans sold, the level of reimbursement requests received from loan purchasers and estimates of losses that may be associated with previously sold loans. At June 30, 2018 the Company believes that its obligation to loan purchasers was not material to the Company’s consolidated financial position.

As previously disclosed, Wilmington Trust Corporation (“WTC”), a wholly-owned subsidiary of M&T, is the subject of a class action lawsuit alleging that WTC’s financial reporting and securities filings prior to its acquisition by M&T in 2011 were in violation of securities laws.  In April 2018, the parties reached an agreement in principle and a formal settlement agreement was executed and filed with the court later in the second quarter of 2018.  The proposed settlement was preliminarily approved by the court in July 2018.  The final settlement hearing is scheduled to occur in the fourth quarter of 2018.  In the first quarter of 2018, the Company increased its reserve for litigation matters by $135 million in anticipation of the settlement.  

M&T and its subsidiaries are subject in the normal course of business to various other pending and threatened legal proceedings and matters in which claims for monetary damages are asserted.  On an on-going basis management, after consultation with legal counsel, assesses the Company’s liabilities and contingencies in connection with such proceedings.  For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements.  To the extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not currently estimable.  Although not considered probable, the range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, was between $0 and $50 million.  Although the Company does not believe that the outcome of pending litigations will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

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Segment information

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Segment information

13. Segment information

Reportable segments have been determined based upon the Company's internal profitability reporting system, which is organized by strategic business unit.  Certain strategic business units have been combined for segment information reporting purposes where the nature of the products and services, the type of customer and the distribution of those products and services are similar.  The reportable segments are Business Banking, Commercial Banking, Commercial Real Estate, Discretionary Portfolio, Residential Mortgage Banking and Retail Banking.

The financial information of the Company's segments was compiled utilizing the accounting policies described in note 22 of Notes to Financial Statements in the 2017 Annual Report.  The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to GAAP.  As a result, the financial information of the reported segments is not necessarily comparable with similar information reported by other financial institutions.  Furthermore, changes in management structure or allocation methodologies and procedures may result in changes in reported segment financial data.  

13. Segment information, continued

Information about the Company's segments is presented in the following table:

	Three Months Ended June 30
	2018							2017
	Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)		Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)
	(In thousands)
Business Banking	$	136,029		912			43,007	$	124,982		1,006			28,750
Commercial Banking		269,499		928			126,391		277,116		843			105,627
Commercial Real Estate		205,541		385			112,691		197,298		357			87,271
Discretionary Portfolio		58,976		(10,554	)		29,113		72,044		(12,397	)		29,740
ResidentialMortgageBanking		82,167		16,047			15,402		88,700		18,144			13,742
Retail Banking		420,540		2,707			143,089		383,904		3,045			100,094
All Other		293,449		(10,425	)		23,467		254,972		(10,998	)		15,829
Total	$	1,466,201		—			493,160	$	1,399,016		—			381,053

	Six Months Ended June 30
	2018								2017
	Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)			Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)
	(In thousands)
Business Banking	$	263,913		1,830			80,725		$	245,315		1,917			53,738
Commercial Banking		535,895		1,778			251,856			551,024		1,763			218,414
Commercial Real Estate		408,148		725			220,994			392,423		764			171,818
Discretionary Portfolio		109,014		(21,386	)		48,852			150,990		(25,324	)		63,685
Residential Mortgage Banking		164,625		31,468			30,348			174,102		36,355			23,660
Retail Banking		814,016		5,572			266,469			752,422		6,092			186,285
All Other		604,803		(19,987	)		(53,474	)		493,845		(21,567	)		12,380
Total	$	2,900,414		—			845,770		$	2,760,121		—			729,980

13. Segment information, continued

	Average Total Assets
	Six Months Ended June 30				Year Ended December 31
	2018		2017		2017
	(In millions)
Business Banking	$	5,656		5,595		5,602
Commercial Banking		26,542		26,802		26,573
Commercial Real Estate		22,848		22,875		22,741
Discretionary Portfolio		33,277		38,341		37,203
Residential Mortgage Banking		2,186		2,341		2,355
Retail Banking		13,403		12,337		12,702
All Other		13,109		13,574		13,684
Total	$	117,021		121,865		120,860

(a) Total revenues are comprised of net interest income and other income.  Net interest income is the difference between taxable-equivalent interest earned on assets and interest paid on liabilities owed by a segment and a funding charge (credit) based on the Company's internal funds transfer and allocation methodology.  Segments are charged a cost to fund any assets (e.g. loans) and are paid a funding credit for any funds provided (e.g. deposits).  The taxable-equivalent adjustment aggregated $5,397,000 and $8,736,000 for the three-month periods ended June 30, 2018 and 2017, respectively, and $10,206,000 and $16,735,000 for the six-month periods ended June 30, 2018 and 2017, respectively, and is eliminated in "All Other" total revenues.  Intersegment revenues are included in total revenues of the reportable segments.  The elimination of intersegment revenues is included in the determination of "All Other" total revenues.

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Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

6 Months Ended

Jun. 30, 2018

Text Block [Abstract]

Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

14. Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

M&T holds a 20% minority interest in Bayview Lending Group LLC ("BLG"), a privately-held commercial mortgage company. M&T recognizes income or loss from BLG using the equity method of accounting.  That investment had no remaining carrying value at June 30, 2018 as a result of cumulative losses recognized and cash distributions received.  Income recognized by M&T is included in other revenues from operations and was not significant during the three-month periods ended June 30, 2018 and 2017 or the six-month period ended June 30, 2017. Income recognized during the six months ended June 30, 2018 totaled $23 million.

Bayview Financial Holdings, L.P. (together with its affiliates, "Bayview Financial"), a privately-held specialty mortgage finance company, is BLG's majority investor.  In addition to their common investment in BLG, the Company and Bayview Financial conduct other business activities with each other.  The Company has obtained loan servicing rights for mortgage loans from BLG and Bayview Financial having outstanding principal balances of $2.8 billion and $3.0 billion at June 30, 2018 and December 31, 2017, respectively. Revenues from those servicing rights were $4 million for each of the three-month periods ended June 30, 2018 and 2017, and $7 million and $9 million for the six-month periods ended June 30, 2018 and 2017, respectively. The Company sub-services residential mortgage loans for Bayview Financial having outstanding principal balances of $53.5 billion and $56.6 billion at June 30, 2018 and December 31, 2017, respectively.  Revenues earned for sub-servicing loans for Bayview Financial were $28 million and $25 million for the three-month periods ended June 30, 2018 and 2017, respectively, and $58 million and $48 million for the six-month periods ended June 30, 2018 and 2017, respectively. In addition, the Company held $123 million and $136 million of mortgage-backed securities in its held-to-maturity portfolio at June 30, 2018 and December 31, 2017, respectively, that were securitized by Bayview Financial. At June 30, 2018, the Company held $90 million of Bayview Financial’s $750 million syndicated loan facility.  

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Revenue from Contracts with Customer

6 Months Ended

Jun. 30, 2018

Revenue From Contract With Customer [Abstract]

Revenue from Contracts with Customer

15. Revenue from contracts with customers

Effective January 1, 2018 the Company adopted amended accounting and disclosure guidance for revenue from contracts with customers under the modified retrospective approach.  A significant amount of the Company’s revenues are derived from net interest income on financial assets and liabilities, mortgage banking revenues, trading account and foreign exchange gains, investment securities gains, loan and letter of credit fees, operating lease income, income from bank-owned life insurance, and certain other revenues that are generally excluded from the scope of the amended guidance.  As of result of the adoption, the Company began reporting credit card interchange revenue net of $3 million and $6 million of rewards in other revenue from operations for the three-month and six-month periods ended June 30, 2018, respectively.  For the three-month and six-month periods ended June 30, 2017, credit card rewards expense of $3 million and $5 million, respectively, was included in other costs of operations.  The adjustment to beginning retained earnings as well as the impact of any changes in timing of revenue recognition of noninterest income items within the scope of the guidance was not material to the Company’s consolidated financial position at December 31, 2017 or its consolidated results of operations for the six months ended June 30, 2018.  

For noninterest income revenue streams within the scope of the amended guidance, the Company recognizes the expected amount of consideration as revenue when the performance obligations related to the services under the terms of a contract are satisfied. The Company’s contracts generally do not contain terms that necessitate significant judgment to determine the amount of revenue to recognize.

The Company generally charges customer accounts or otherwise bills customers upon completion of its services.  Typically the Company’s contracts with customers have a duration of one year or less and payment for services is received at least annually, but oftentimes more frequently as services are provided.  At June 30, 2018, the Company had $53 million of uncollected amounts receivable related to recognized revenue from the sources in the table below.  Such amount is classified in accrued interest and other assets in the Company’s consolidated balance sheet.  In certain situations the Company is paid in advance of providing services and defers the recognition of revenue until its service obligation is satisfied.  At June 30, 2018, the Company had deferred revenue of $46 million related to the sources in the table below recorded in accrued interest and other liabilities on its consolidated balance sheet.  The following tables summarize sources of M&T’s noninterest income during 2018 that are subject to the amended guidance.

	Three Months Ended June 30, 2018
	Business Banking		Commercial Banking		Commercial Real Estate		Discretionary Portfolio		Residential Mortgage Banking		Retail Banking		All Other		Total
	(In thousands)
Classification in consolidated statement of    income
Service charges on deposit accounts	$	15,611		24,270		2,451		—		3		63,015		1,434	$	106,784
Trust income		—		—		—		—		—		—		137,641		137,641
Brokerage services income		—		—		—		—		—		—		12,629		12,629
Other revenues from operations:
Merchant discount and credit card fees		8,334		12,542		428		—		—		4,140		618		26,062
Other		—		3,646		2,215		413		927		9,613		7,598		24,412
	$	23,945		40,458		5,094		413		930		76,768		159,920	$	307,528

15. Revenue from contracts with customers, continued

	Six Months Ended June 30, 2018
	Business Banking		Commercial Banking		Commercial Real Estate		Discretionary Portfolio		Residential Mortgage Banking		Retail Banking		All Other		Total
	(In thousands)
Classification in consolidated statement of    income
Service charges on deposit accounts	$	31,015		48,924		5,215		—		6		123,616		3,123	$	211,899
Trust income		—		—		—		—		—		—		269,016		269,016
Brokerage services income		—		—		—		—		—		—		26,021		26,021
Other revenues from operations:
Merchant discount and credit card fees		15,837		25,254		982		—		—		7,528		1,233		50,834
Other		—		5,209		3,074		865		1,970		19,478		16,706		47,302
	$	46,852		79,387		9,271		865		1,976		150,622		316,099	$	605,072

Service charges on deposit accounts are generally deducted directly from customer account balances and include account maintenance charges as well as fees for insufficient funds, debit card usage, and other transactional services.  Account maintenance charges are generally recognized as revenue on a monthly basis, whereas transactional fees are recognized after M&T provides the respective service.

Trust income includes fees related to the Institutional Client Services (“ICS”) business and the Wealth Advisory Services (“WAS”) business.  Revenues from the ICS business are largely derived from a variety of trustee, agency,

investment, cash management and administrative services, whereas revenues from the WAS business are mainly derived from asset management, fiduciary services, and family office services.  Trust fees may be billed in arrears or in advance and are recognized as revenues as M&T’s performance obligations are satisfied.  Certain fees are based on a percentage of assets invested or under management and are recognized as the service is performed and constraints regarding the uncertainty of the amount of fees are resolved.

Brokerage service income includes revenues from the sale of mutual funds and annuities and securities brokerage fees.  Such revenues are generally recognized at the time of transaction execution.  Mutual fund and other distribution fees are recognized upon initial placement of customer funds as well as in future periods as such customers continue to hold amounts in those mutual funds.  

Other revenues from operations include merchant discount and credit card fees such as interchange fees and merchant discount fees that are generally recognized when the cardholder’s transaction is approved and settled.  Beginning in 2018, credit card rewards accrued to cardholders are recognized as a reduction of interchange revenue.  Also included in other revenues from operations are insurance commissions, ATM surcharge fees, and advisory fees.  Insurance commissions are recognized at the time the insurance policy is executed with the customer.  Insurance renewal commissions are recognized upon subsequent renewal of the policy.  ATM surcharge fees are included in revenue at the time of the respective ATM transaction.  Advisory fees are generally recognized at the conclusion of the advisory engagement when the Company has satisfied its service obligation.

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Recent accounting developments

6 Months Ended

Jun. 30, 2018

Accounting Changes And Error Corrections [Abstract]

Recent accounting developments

16. Recent accounting developments

The following table provides a description of accounting standards that were adopted by the company in 2018 as well as standards that are not effective that could have an impact to M&T’s consolidated financial statements upon adoption.

16. Recent accounting developments, continued

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Adopted in 2018
Revenue from Contracts with Customers	The core principle of the accounting guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.	January 1, 2018	As described in note 15 the Company adopted the revenue recognition guidance effective January 1, 2018 and applied the modified retrospective approach for reporting purposes.  The adjustment to beginning retained earnings as well as the impact of any changes in the timing of revenue recognition of noninterest income items within the scope of this guidance did not have a material effect on the Company’s financial position or results of operations.
Recognition and Measurement of Financial Assets and Financial Liabilities	The amended guidance requires equity investments (excluding those accounted for under the equity method of accounting or those that result in consolidation of the investee) be measured at fair value with changes in fair value recognized in net income, public entities to use the exit price when measuring the fair value of financial instruments for disclosure purposes, and an entity to present separately in other comprehensive income a change in the instrument-specific credit risk when the entity has elected to measure a liability at fair value in accordance with the fair value option.	January 1, 2018	At January 1, 2018 the Company reclassified marketable equity securities from investment securities available for sale.  Upon adoption $17 million of fair value changes in those equity securities, net of tax were reclassified from accumulated other comprehensive income to retained earnings.  See note 2 for information on amounts recognized in gain (loss) on bank investment securities in the consolidated statement of income.
Improvements to Accounting for  Hedging Activities	The amended guidance expands and clarifies hedge accounting for nonfinancial and financial risk components, aligns the recognition and presentation of the effects of the hedging instrument and hedged item in the financial statements, and simplifies the requirements for assessing effectiveness in a hedging relationship.	January 1, 2019 Early adoption permitted	The Company early adopted the amended guidance on January 1, 2018 and such adoption did not have a material impact on its consolidated financial statements.
Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	The amended guidance requires the service cost component of the net periodic pension cost and net periodic postretirement benefit cost to be reported in the same line item in the income statement as other compensation costs arising from services rendered by the pertinent employees during the period.  The amendments also require that the other components of net benefit costs be presented separately from the service cost component.	January 1, 2018	The Company adopted the new reporting requirements effective January 1, 2018.  The Company previously reported all of its net periodic pension and postretirement benefit costs in salaries and employee benefits within the consolidated statement of income.  Information about net periodic pension and postretirement benefit costs that were not service cost-related is included in note 6.  The impact of adopting the amended guidance was not material.
Scope of Modification Accounting for Share-Based Payment Awards	The amended guidance addresses which changes to the terms and conditions of a share-based payment award require an entity to apply modification accounting.	January 1, 2018	The Company adopted the amended guidance on January 1, 2018.  The guidance is being applied on a prospective basis for awards modified on or after the adoption date.
Restricted Cash	The amended guidance requires that restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows.  In addition, when cash, cash equivalents, and restricted cash or restricted cash equivalents are presented in more than one line item within the statement of financial position, the line items and amounts must be presented on the face of the statement of cash flows or disclosed in the notes to the financial statements.  Information about the nature of restrictions on an entity’s cash and cash equivalents must also be disclosed.	January 1, 2018	The guidance was adopted on January 1, 2018 and did not have a material impact on the Company’s consolidated financial statements.

16. Recent accounting developments, continued

	Standard	Description	Required date of adoption	Effect on consolidated financial statements
	Standards Adopted in 2018
	Classification of Certain Cash Receipts and Cash Payments	This amendment provides clarifying guidance for classifying cash inflows or outflows on the statement of cash flows where current guidance is unclear or silent.	January 1, 2018	The guidance was applied for  2018 reporting and did not have a material impact on the Company’s consolidated statement of cash flows.
	Clarifying the Definition of a Business	The amended guidance clarifies the definition of a business for purposes of evaluating whether transactions would be accounted for as acquisitions (or disposals) of assets or businesses.	January 1, 2018	The guidance was adopted January 1, 2018 and will be applied to future transactions. The Company does not expect the guidance to have a material impact on its consolidated financial statements.
Standards Not Yet Adopted as of June 30, 2018
	Leases	The new guidance requires lessees to record a right-of-use asset and a lease liability for all leases with a term greater than 12 months.  While the guidance requires all leases to be recognized in the balance sheet, there continues to be a differentiation between finance leases and operating leases for purposes of income statement recognition and cash flow statement presentation.  For finance leases, interest on the lease liability and amortization of the right-of-use asset will be recognized separately in the statement of income.  Repayments of principal on those lease liabilities will be classified within financing activities and payments of interest on the lease liability will be classified within operating activities in the statement of cash flows.  For operating leases, a single lease cost is recognized in the statement of income and allocated over the lease term, generally on a straight-line basis.  All cash payments are presented within operating activities in the statement of cash flows. The accounting applied by lessors is largely unchanged from existing GAAP, however, the guidance eliminates the accounting model for leveraged leases for leases that commence after the effective date of the guidance.	January 1, 2019 Early adoption permitted	The Company occupies certain banking offices and uses certain equipment under noncancelable operating lease agreements which currently are not reflected in its consolidated balance sheet.  Upon adoption of the guidance, the Company expects to report increased assets and increased liabilities as a result of recognizing right-of-use assets and lease liabilities on its consolidated balance sheet. The Company was committed to $429 million of minimum lease payments under noncancelable operating lease agreements at December 31, 2017.  The Company does not expect the new guidance will have a material impact to its consolidated statement of income.
	Premium Amortization on Purchased Callable Debt Securities	The amended guidance requires the premium on callable debt securities to be amortized to the earliest call date.  The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity.	January 1, 2019 Early adoption permitted	The amendments should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company does not expect the guidance to have a material impact on its consolidated financial statements.

16. Recent accounting developments, continued

Standard	Description	Required date of adoption	Effect on consolidated financial statements
Standards Not Yet Adopted as of June 30, 2018
Measurement of Credit Losses on Financial Instruments	The amended guidance replaces the current incurred loss model for determining the allowance for credit losses. The guidance requires financial assets measured at amortized cost to be presented at the net amount expected to be collected.  The allowance for credit losses will represent a valuation account that is deducted from the amortized cost basis of the financial assets to present their net carrying value at the amount expected to be collected. The income statement will reflect the measurement of credit losses for newly recognized financial assets as well as expected increases or decreases of expected credit losses that have taken place during the period. When determining the allowance, expected credit losses over the contractual term of the financial asset(s) (taking into account prepayments) will be estimated considering relevant information about past events, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount.  The amended guidance also requires recording an allowance for credit losses for purchased financial assets with a more-than-insignificant amount of credit deterioration since origination.  The initial allowance for these assets will be added to the purchase price at acquisition rather than being reported as an expense.  Subsequent changes in the allowance will be recorded through the income statement as an expense adjustment.  In addition, the amended guidance requires credit losses relating to available-for-sale debt securities to be recorded through an allowance for credit losses. The calculation of credit losses for available-for-sale securities will be similar to how it is determined under existing guidance.	January 1, 2020 Early adoption permitted as of January 1, 2019	The Company is developing its approach for determining expected credit losses under the new guidance.  The Company expects that the new guidance will result in an increase in its allowance for credit losses as a result of considering credit losses over the expected life of its loan portfolios.  Increases in the level of allowances will reflect new requirements to include the nonaccretable principal difference on purchased credit impaired loans and estimated credit losses on investment securities classified as held-to-maturity, if any.  The expected increase to the allowance for credit losses and the impact to the Company’s financial statements are still being determined.
Simplifying the Test for Goodwill Impairment	The amended guidance eliminates step 2 from the goodwill impairment test.	January 1, 2020 Early adoption permitted	The amendments should be applied using a prospective transition method. The Company does not expect the guidance will have a material impact on its consolidated financial statements, unless at some point in the future one of its reporting units were to fail step 1 of the goodwill impairment test.

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Significant accounting policies (Policies)

6 Months Ended

Jun. 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.

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Investment securities (Tables)

6 Months Ended

Jun. 30, 2018

Investments Debt And Equity Securities [Abstract]

Amortized Cost and Estimated Fair Value of Investment Securities

The amortized cost and estimated fair value of investment securities were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
June 30, 2018
Investment securities available for sale:
U.S. Treasury and federal agencies	$	1,726,242		4		18,425	$	1,707,821
Obligations of states and political subdivisions		1,914		12		1		1,925
Mortgage-backed securities:
Government issued or guaranteed		8,046,603		15,521		244,825		7,817,299
Privately issued		26		—		2		24
Other debt securities		137,375		2,225		7,823		131,777
		9,912,160		17,762		271,076		9,658,846
Investment securities held to maturity:
Obligations of states and political subdivisions		13,547		57		20		13,584
Mortgage-backed securities:
Government issued or guaranteed		2,960,045		4,539		71,183		2,893,401
Privately issued		122,906		11,451		23,610		110,747
Other debt securities		4,597		—		—		4,597
		3,101,095		16,047		94,813		3,022,329
Total debt securities	$	13,013,255		33,809		365,889	$	12,681,175
Equity and other securities:
Readily marketable equity — at fair value		70,810		16,527		855		86,482
Other — at cost		436,579		—		—		436,579
Total equity and other securities	$	507,389		16,527		855	$	523,061

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
December 31, 2017
Investment securities available for sale:
U.S. Treasury and federal agencies	$	1,965,665		—		18,178	$	1,947,487
Obligations of states and political subdivisions		2,555		36		2		2,589
Mortgage-backed securities:
Government issued or guaranteed		8,755,482		59,497		98,587		8,716,392
Privately issued		28		—		—		28
Other debt securities		136,905		2,402		10,475		128,832
Equity securities		78,161		23,219		424		100,956
		10,938,796		85,154		127,666		10,896,284
Investment securities held to maturity:
Obligations of states and political subdivisions		24,562		109		49		24,622
Mortgage-backed securities:
Government issued or guaranteed		3,187,953		27,236		13,746		3,201,443
Privately issued		135,688		2,574		27,575		110,687
Other debt securities		5,010		—		—		5,010
		3,353,213		29,919		41,370		3,341,762
Other securities — at cost		415,028		—		—		415,028
Total	$	14,707,037		115,073		169,036	$	14,653,074

Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity

At June 30, 2018, the amortized cost and estimated fair value of debt securities by contractual maturity were as follows:

	Amortized Cost		Estimated Fair Value
	(In thousands)
Debt securities available for sale:
Due in one year or less	$	1,297,040		1,286,504
Due after one year through five years		436,548		428,617
Due after five years through ten years		96,521		95,992
Due after ten years		35,422		30,410
		1,865,531		1,841,523
Mortgage-backed securities available for sale		8,046,629		7,817,323
	$	9,912,160		9,658,846
Debt securities held to maturity:
Due in one year or less	$	7,630		7,633
Due after one year through five years		5,917		5,951
Due after ten years		4,597		4,597
		18,144		18,181
Mortgage-backed securities held to maturity		3,082,951		3,004,148
	$	3,101,095		3,022,329

Investment Securities in Continuous Unrealized Loss Position

A summary of investment securities that as of June 30, 2018 and December 31, 2017 had been in a continuous unrealized loss position for less than twelve months and those that had been in a continuous unrealized loss position for twelve months or longer follows:

	Less Than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
June 30, 2018
Investment securities available for sale:
U.S. Treasury and federal agencies	$	164,931		(1,622	)		1,539,796		(16,803	)
Obligations of states and political subdivisions		—		—			375		(1	)
Mortgage-backed securities:
Government issued or guaranteed		3,872,321		(91,083	)		2,907,972		(153,742	)
Privately issued		8		(2	)		—		—
Other debt securities		4,323		(94	)		63,902		(7,729	)
		4,041,583		(92,801	)		4,512,045		(178,275	)
Investment securities held to maturity:
Obligations of states and political subdivisions		—		—			4,218		(20	)
Mortgage-backed securities:
Government issued or guaranteed		2,252,672		(58,405	)		250,341		(12,778	)
Privately issued		—		—			53,579		(23,610	)
		2,252,672		(58,405	)		308,138		(36,408	)
Total	$	6,294,255		(151,206	)		4,820,183		(214,683	)
December 31, 2017
Investment securities available for sale:
U.S. Treasury and federal agencies	$	278,132		(1,761	)		1,669,355		(16,417	)
Obligations of states and political subdivisions		—		—			474		(2	)
Mortgage-backed securities:
Government issued or guaranteed		2,106,142		(13,695	)		3,138,841		(84,892	)
Other debt securities		3,067		(26	)		61,159		(10,449	)
Equity securities (a)		—		—			18,162		(424	)
		2,387,341		(15,482	)		4,887,991		(112,184	)
Investment securities held to maturity:
Obligations of states and political subdivisions		2,954		(4	)		6,110		(45	)
Mortgage-backed securities:
Government issued or guaranteed		1,331,759		(7,036	)		265,695		(6,710	)
Privately issued		5,061		(1,216	)		55,255		(26,359	)
		1,339,774		(8,256	)		327,060		(33,114	)
Total	$	3,727,115		(23,738	)		5,215,051		(145,298	)

(a) Beginning January 1, 2018, equity securities with readily determinable fair values are required to be measured at fair value with changes in fair value recognized in the consolidated statement of income. As a result, subsequent to December 31, 2017 disclosing the time period for which these equity securities had been in a continuous unrealized loss position is no longer relevant.

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Loans and leases and the allowance for credit losses (Tables)

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Summary of Current, Past Due and Nonaccrual Loans

A summary of current, past due and nonaccrual loans as of June 30, 2018 and December 31, 2017 follows:

	Current		30-89 Days Past Due		Accruing LoansPast Due 90 Days or More (a)		Accruing Loans Acquiredat a Discount Past Due 90 days or More (b)		Purchased Impaired (c)		Nonaccrual		Total
	(In thousands)
June 30, 2018
Commercial, financial, leasing, etc.	$	21,615,676		29,906		4,210		31		3		245,031	$	21,894,857
Real estate:
Commercial		25,352,075		212,480		10,621		4,330		10,579		153,552		25,743,637
Residential builder and developer		1,628,793		8,668		—		—		547		5,212		1,643,220
Other commercial construction		6,597,814		140,490		4,000		—		1,053		7,723		6,751,080
Residential		14,456,180		425,894		200,159		8,019		244,865		215,850		15,550,967
Residential — limited documentation		2,488,340		79,179		—		—		95,418		96,808		2,759,745
Consumer:
Home equity lines and loans		4,931,331		29,589		49		6,856		—		66,690		5,034,515
Automobile		3,450,113		69,398		—		—		—		19,564		3,539,075
Other		4,807,912		30,732		3,987		28,169		—		9,554		4,880,354
Total	$	85,328,234		1,026,336		223,026		47,405		352,465		819,984	$	87,797,450
December 31, 2017
Commercial, financial, leasing, etc.	$	21,332,234		167,756		1,322		327		21		240,991	$	21,742,651
Real estate:
Commercial		24,910,381		166,305		4,444		6,016		16,815		184,982		25,288,943
Residential builder and developer		1,618,973		5,159		—		—		1,135		6,451		1,631,718
Other commercial construction		6,407,451		23,467		—		—		4,706		10,088		6,445,712
Residential		15,376,759		474,372		233,437		7,582		282,102		235,834		16,610,086
Residential — limited documentation		2,718,019		83,898		—		—		105,236		96,105		3,003,258
Consumer:
Home equity lines and loans		5,171,345		38,546		—		9,391		—		74,500		5,293,782
Automobile		3,441,371		78,511		—		—		—		23,781		3,543,663
Other		4,349,071		40,929		5,202		24,102		—		9,866		4,429,170
Total	$	85,325,604		1,078,943		244,405		47,418		410,015		882,598	$	87,988,983

(a) Excludes loans acquired at a discount.

(b) Loans acquired at a discount that were recorded at fair value at acquisition date.  This category does not include purchased impaired loans that are presented separately.

(c) Accruing loans acquired at a discount that were impaired at acquisition date and recorded at fair value.

Outstanding Principal Balance and Carrying Amount of Loans and Included in Consolidated Balance Sheet

The outstanding principal balance and the carrying amount of loans acquired at a discount that were recorded at fair value at the acquisition date and included in the consolidated balance sheet were as follows:

	June 30,		December 31,
	2018		2017
	(In thousands)
Outstanding principal balance	$	1,213,758		1,394,188
Carrying amount:
Commercial, financial, leasing, etc.		27,726		31,105
Commercial real estate		183,126		228,054
Residential real estate		545,438		620,827
Consumer		107,492		123,413
	$	863,782		1,003,399

Summary of Changes in Accretable Yield for Acquired Loans

  A summary of changes in the accretable yield for loans acquired at a discount for the three months and six months ended June 30, 2018 and 2017 follows:

	Three Months Ended June 30,
	2018						2017
	Purchased			Other			Purchased			Other
	Impaired			Acquired			Impaired			Acquired
	(In thousands)
Balance at beginning of period	$	149,007			118,184		$	143,454		$	181,310
Interest income		(7,969	)		(15,394	)		(10,806	)		(20,923	)
Reclassifications from nonaccretable balance		8,350			10,998			884			1,852
Other (a)		—			3,927			—			860
Balance at end of period	$	149,388			117,715		$	133,532		$	163,099

	Six Months Ended June 30,
	2018						2017
	Purchased			Other			Purchased			Other
	Impaired			Acquired			Impaired			Acquired
	(In thousands)
Balance at beginning of period	$	157,918		$	133,162		$	154,233			201,153
Interest income		(17,788	)		(30,506	)		(21,731	)		(46,441	)
Reclassifications from nonaccretable balance		9,258			11,205			1,030			5,035
Other (a)		—			3,854			—			3,352
Balance at end of period	$	149,388		$	117,715		$	133,532			163,099

(a) Other changes in expected cash flows including changes in interest rates and prepayment assumptions.

Changes in Allowance for Credit Losses

Changes in the allowance for credit losses for the three months ended June 30, 2018 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	326,071			367,717			73,047			173,841			78,995		$	1,019,671
Provision for credit losses		11,250			(10,845	)		5,242			30,801			(1,448	)		35,000
Net charge-offs
Charge-offs		(14,900	)		(4,548	)		(3,966	)		(34,033	)		—			(57,447	)
Recoveries		6,409			1,437			1,800			12,378			—			22,024
Net charge-offs		(8,491	)		(3,111	)		(2,166	)		(21,655	)		—			(35,423	)
Ending balance	$	328,830			353,761			76,123			182,987			77,547		$	1,019,248

Changes in the allowance for credit losses for the three months ended June 30, 2017 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	347,760			360,010			62,012			153,172			78,476		$	1,001,430
Provision for credit losses		13,368			7,638			7,163			24,190			(359	)		52,000
Net charge-offs
Charge-offs		(25,247	)		(1,853	)		(5,899	)		(28,683	)		—			(61,682	)
Recoveries		3,433			434			2,730			9,880			—			16,477
Net charge-offs		(21,814	)		(1,419	)		(3,169	)		(18,803	)		—			(45,205	)
Ending balance	$	339,314			366,229			66,006			158,559			78,117		$	1,008,225

Changes in the allowance for credit losses for the six months ended June 30, 2018 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(In thousands)
Beginning balance	$	328,599			374,085			65,405			170,809			78,300		$	1,017,198
Provision for credit losses		18,480			(16,070	)		15,728			60,615			(753	)		78,000
Net charge-offs
Charge-offs		(29,481	)		(5,914	)		(8,320	)		(70,484	)		—			(114,199	)
Recoveries		11,232			1,660			3,310			22,047			—			38,249
Net charge-offs		(18,249	)		(4,254	)		(5,010	)		(48,437	)		—			(75,950	)
Ending balance	$	328,830			353,761			76,123			182,987			77,547		$	1,019,248

Changes in the allowance for credit losses for the six months ended June 30, 2017 were as follows:

	Commercial, Financial,			Real Estate
	Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(In thousands)
Beginning balance	$	330,833			362,719			61,127			156,288			78,030	$	988,997
Provision for credit losses		42,191			8,900			12,800			43,022			87		107,000
Net charge-offs
Charge-offs		(41,604	)		(7,298	)		(12,158	)		(63,186	)		—		(124,246	)
Recoveries		7,894			1,908			4,237			22,435			—		36,474
Net charge-offs		(33,710	)		(5,390	)		(7,921	)		(40,751	)		—		(87,772	)
Ending balance	$	339,314			366,229			66,006			158,559			78,117	$	1,008,225

Impaired Loans and Leases

Information with respect to loans and leases that were considered impaired as of June 30, 2018 and December 31, 2017 and for the three-month and six-month periods ended June 30, 2018 and 2017 follows.

	June 30, 2018						December 31, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
	(In thousands)
With an allowance recorded:
Commercial, financial, leasing, etc.	$	157,228		180,016		37,589		177,250		194,257		45,488
Real estate:
Commercial		85,588		96,221		9,316		67,199		75,084		9,140
Residential builder and developer		6,085		6,465		211		5,320		5,641		308
Other commercial construction		1,829		17,670		345		4,817		20,357		647
Residential		117,111		139,966		4,068		101,724		122,602		4,000
Residential — limited documentation		76,040		91,851		4,000		77,277		92,439		3,900
Consumer:
Home equity lines and loans		48,436		53,538		8,757		48,847		53,914		8,812
Automobile		12,467		15,396		2,595		13,498		15,737		2,811
Other		3,011		6,036		614		3,220		5,872		656
		507,795		607,159		67,495		499,152		585,903		75,762
With no related allowance recorded:
Commercial, financial, leasing, etc.		112,604		139,843		—		89,126		115,327		—
Real estate:
Commercial		89,024		99,658		—		138,356		149,716		—
Residential builder and developer		4,353		4,471		—		5,057		5,296		—
Other commercial construction		6,021		9,726		—		5,456		9,130		—
Residential		12,665		17,161		—		13,574		18,980		—
Residential — limited documentation		6,831		11,853		—		9,588		16,138		—
		231,498		282,712		—		261,157		314,587		—
Total:
Commercial, financial, leasing, etc.		269,832		319,859		37,589		266,376		309,584		45,488
Real estate:
Commercial		174,612		195,879		9,316		205,555		224,800		9,140
Residential builder and developer		10,438		10,936		211		10,377		10,937		308
Other commercial construction		7,850		27,396		345		10,273		29,487		647
Residential		129,776		157,127		4,068		115,298		141,582		4,000
Residential — limited documentation		82,871		103,704		4,000		86,865		108,577		3,900
Consumer:
Home equity lines and loans		48,436		53,538		8,757		48,847		53,914		8,812
Automobile		12,467		15,396		2,595		13,498		15,737		2,811
Other		3,011		6,036		614		3,220		5,872		656
Total	$	739,293		889,871		67,495		760,309		900,490		75,762

Interest Income Recognized on Impaired Loans

	Three Months Ended June 30, 2018						Three Months Ended June 30, 2017
			Interest Income Recognized						Interest Income Recognized
	Average Recorded Investment		Total		Cash Basis		Average Recorded Investment		Total		Cash Basis
	(In thousands)
Commercial, financial, leasing, etc.	$	271,413		1,333		1,333		230,767		805		805
Real estate:
Commercial		168,224		3,811		3,811		200,005		813		813
Residential builder and developer		8,494		—		—		15,577		467		467
Other commercial construction		7,443		53		53		14,213		86		86
Residential		126,185		2,329		937		108,036		1,465		606
Residential — limited documentation		83,776		1,428		317		95,208		1,449		339
Consumer:
Home equity lines and loans		48,644		433		72		46,872		422		91
Automobile		12,636		225		14		15,506		262		21
Other		3,066		88		3		3,468		75		3
Total	$	729,881		9,700		6,540		729,652		5,844		3,231

	Six Months Ended June 30, 2018						Six Months Ended June 30, 2017
			Interest Income Recognized						Interest Income Recognized
	Average Recorded Investment		Total		Cash Basis		Average Recorded Investment		Total		Cash Basis
	(In thousands)
Commercial, financial, leasing, etc.	$	271,793		2,116		2,116		251,352		1,283		1,283
Real estate:
Commercial		175,035		6,958		6,958		191,935		1,788		1,788
Residential builder and developer		9,167		1,682		1,682		17,552		896		896
Other commercial construction		8,773		59		59		14,922		933		933
Residential		123,697		4,231		1,839		106,166		3,101		1,380
Residential — limited documentation		84,686		3,156		1,013		96,033		2,949		723
Consumer:
Home equity lines and loans		48,721		847		158		46,327		821		191
Automobile		12,881		449		29		15,931		537		40
Other		3,092		173		6		3,510		147		6
Total	$	737,845		19,671		13,860		743,728		12,455		7,240

Summary of Loan Grades

The following table summarizes the loan grades applied to the various classes of the Company’s commercial loans and commercial real estate loans.

			Real Estate
	Commercial,				Residential		Other
	Financial,				Builder and		Commercial
	Leasing, etc.		Commercial		Developer		Construction
	(In thousands)
June 30, 2018
Pass	$	20,769,679		24,954,015		1,503,766		6,594,613
Criticized accrual		880,147		636,070		134,242		148,744
Criticized nonaccrual		245,031		153,552		5,212		7,723
Total	$	21,894,857		25,743,637		1,643,220		6,751,080
December 31, 2017
Pass	$	20,490,486		24,380,184		1,485,148		6,270,812
Criticized accrual		1,011,174		723,777		140,119		164,812
Criticized nonaccrual		240,991		184,982		6,451		10,088
Total	$	21,742,651		25,288,943		1,631,718		6,445,712

Allocation of Allowance for Credit Losses on Basis of Company's Impairment Methodology

The allocation of the allowance for credit losses summarized on the basis of the Company’s impairment methodology was as follows:

	Commercial, Financial,		Real Estate
	Leasing, etc.		Commercial		Residential		Consumer		Total
	(In thousands)
June 30, 2018
Individually evaluated for impairment	$	37,589		9,872		8,068		11,966	$	67,495
Collectively evaluated for impairment		291,241		343,889		54,999		171,021		861,150
Purchased impaired		—		—		13,056		—		13,056
Allocated	$	328,830		353,761		76,123		182,987		941,701
Unallocated										77,547
Total									$	1,019,248
December 31, 2017
Individually evaluated for impairment	$	45,488		10,095		7,900		12,279	$	75,762
Collectively evaluated for impairment		283,111		363,990		47,645		158,530		853,276
Purchased impaired		—		—		9,860		—		9,860
Allocated	$	328,599		374,085		65,405		170,809		938,898
Unallocated										78,300
Total									$	1,017,198

Recorded Investment in Loans and Leases on Basis of Company's Impairment Methodology

The recorded investment in loans and leases summarized on the basis of the Company’s impairment methodology was as follows:

	Commercial, Financial,		Real Estate
	Leasing, etc.		Commercial		Residential		Consumer		Total
	(In thousands)
June 30, 2018
Individually evaluated for impairment	$	269,832		192,900		212,647		63,914	$	739,293
Collectively evaluated  for impairment		21,625,022		33,932,858		17,757,782		13,390,030		86,705,692
Purchased impaired		3		12,179		340,283		—		352,465
Total	$	21,894,857		34,137,937		18,310,712		13,453,944	$	87,797,450
December 31, 2017
Individually evaluated for impairment	$	266,376		226,205		202,163		65,565	$	760,309
Collectively evaluated for impairment		21,476,254		33,117,512		19,023,843		13,201,050		86,818,659
Purchased impaired		21		22,656		387,338		—		410,015
Total	$	21,742,651		33,366,373		19,613,344		13,266,615	$	87,988,983

Loan Modification Activities that were Considered Troubled Debt Restructurings

The table that follows summarizes the Company’s loan modification activities that were considered troubled debt restructurings for the three-month and six-month periods ended June 30, 2018 and 2017:

					Post-modification (a)
	Number		Pre- modification Recorded Investment		Principal Deferral		Interest Rate Reduction		Other		Combination of Concession Types		Total
Three Months Ended June 30, 2018	(Dollars in thousands)
Commercial, financial, leasing, etc.	47		$	41,390	$	9,673	$	29	$	6,111	$	25,021	$	40,834
Real estate:
Commercial		28		7,200		7,376		175		394		—		7,945
Residential		30		7,951		2,814		—		—		5,766		8,580
Residential — limited documentation		3		584		200		—		—		458		658
Consumer:
Home equity lines and loans		10		555		—		—		—		559		559
Automobile		19		333		321		—		—		12		333
Total		137	$	58,013	$	20,384	$	204	$	6,505	$	31,816	$	58,909
Three Months Ended June 30, 2017
Commercial, financial, leasing, etc.		63	$	65,613	$	8,172	$	—	$	5,556	$	35,232	$	48,960
Real estate:
Commercial		30		26,045		11,782		—		—		14,276		26,058
Other commercial construction		1		66		66		—		—		—		66
Residential		30		7,956		2,982		—		—		5,486		8,468
Residential — limited documentation		7		1,831		235		—		—		1,660		1,895
Consumer:
Home equity lines and loans		35		3,229		416		—		—		2,818		3,234
Automobile		22		428		380		—		—		48		428
Other		3		54		54		—		—		—		54
Total		191	$	105,222	$	24,087	$	—	$	5,556	$	59,520	$	89,163

					Post-modification (a)
Six Months Ended June 30, 2018	Number		Pre- modification Recorded Investment		Principal Deferral		Interest Rate Reduction		Other		Combination of Concession Types		Total
	(Dollars in thousands)
Commercial, financial, leasing, etc.		103	$	89,384	$	45,346	$	653	$	6,111	$	38,068	$	90,178
Real estate:
Commercial		48		13,980		13,200		175		394		927		14,696
Other commercial construction		1		752		746		—		—		—		746
Residential		77		20,587		9,759		—		—		12,668		22,427
Residential — limited documentation		5		879		467		—		—		576		1,043
Consumer:
Home equity lines and loans		24		1,903		4		—		—		1,907		1,911
Automobile		27		481		469		—		—		12		481
Other		2		49		49		—		—		—		49
Total		287	$	128,015	$	70,040	$	828	$	6,505	$	54,158	$	131,531
Six Months Ended June 30, 2017
Commercial, financial, leasing, etc.		113	$	77,534	$	12,561	$	—	$	6,362	$	37,960	$	56,883
Real estate:
Commercial		50		32,747		14,773		—		—		17,882		32,655
Residential builder and developer		3		12,291		—		—		—		10,879		10,879
Other commercial construction		2		168		168		—		—		—		168
Residential		71		17,336		8,575		—		—		9,841		18,416
Residential — limited documentation		13		3,209		235		—		—		3,185		3,420
Consumer:
Home equity lines and loans		60		5,731		579		—		491		4,666		5,736
Automobile		42		818		763		—		—		55		818
Other		5		80		80		—		—		—		80
Total		359	$	149,914	$	37,734	$	—	$	6,853	$	84,468	$	129,055

(a) Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.  The present value of interest rate concessions, discounted at the effective rate of the original loan, was not material.

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Shareholders' equity (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Issued and Outstanding Preferred Stock

Issued and outstanding preferred stock of M&T as of June 30, 2018 and December 31, 2017 is presented below:

	Shares Issued and Outstanding		Carrying Value
	(Dollars in thousands)
Series A (a)
Fixed Rate Cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		230,000	$	230,000
Series C (a)
Fixed Rate Cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		151,500	$	151,500
Series E (b)
Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock,     $1,000 liquidation preference per share		350,000	$	350,000
Series F (c)
Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock,     $10,000 liquidation preference per share		50,000	$	500,000

(a) Dividends, if declared, are paid at 6.375%.  Warrants to purchase M&T common stock at $73.71 per share issued in connection with the Series A preferred stock expire on December 23, 2018 and totaled 202,782 at June 30, 2018.

(b) Dividends, if declared, are paid semi-annually at a rate of 6.45% through February 14, 2024 and thereafter will be paid quarterly at a rate of the three-month LIBOR plus 361 basis points.  The shares are redeemable in whole or in part on or after February 15, 2024.  Notwithstanding M&T’s option to redeem the shares, if an event occurs such that the shares no longer qualify as Tier 1 capital, M&T may redeem all of the shares within 90 days following that occurrence.

(c) Dividends, if declared, are paid semi-annually at a rate of 5.125% through October 31, 2026 and thereafter will be paid quarterly at a rate of the three-month LIBOR plus 352 basis points.  The shares are redeemable in whole or in part on or after November 1, 2026.  Notwithstanding M&T’s option to redeem the shares, if an event occurs such that the shares no longer qualify as Tier 1 capital, M&T may redeem all of the shares within 90 days following that occurrence.

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Pension plans and other postretirement benefits (Tables)

6 Months Ended

Jun. 30, 2018

Compensation And Retirement Disclosure [Abstract]

Net Periodic Defined Benefit Cost for Defined Benefit Plans

Net periodic defined benefit cost for defined benefit plans consisted of the following:

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended June 30
	2018			2017			2018			2017
	(In thousands)
Service cost	$	5,069			5,189			243		202
Interest cost on projected benefit obligation		18,548			19,943			589			778
Expected return on plan assets		(30,688	)		(27,062	)		—			—
Amortization of prior service cost (credit)		153			154			(1,189	)		(329	)
Amortization of net actuarial loss (gain)		10,796			7,831			(213	)		(469	)
Net periodic benefit cost	$	3,878			6,055			(570	)		182

	Pension Benefits						Other Postretirement Benefits
	Six Months Ended June 30
	2018			2017			2018			2017
	(In thousands)
Service cost	$	10,172			10,097			469			585
Interest cost on projected benefit obligation		37,353			39,634			1,146			1,858
Expected return on plan assets		(61,563	)		(54,262	)		—			—
Amortization of prior service cost (credit)		278			279			(2,364	)		(679	)
Amortization of net actuarial loss (gain)		21,896			14,631			(413	)		(494	)
Net periodic benefit cost	$	8,136			10,379			(1,162	)		1,270

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Earnings per common share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Computations of Basic Earnings Per Common Share

The computations of basic earnings per common share follow:

	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	493,160			381,053			845,770			729,980
Less: Preferred stock dividends (a)		(18,130	)		(18,237	)		(36,260	)		(36,474	)
Net income available to common equity		475,030			362,816			809,510			693,506
Less: Income attributable to unvested stock-based    compensation awards		(2,432	)		(2,158	)		(4,172	)		(4,298	)
Net income available to common shareholders	$	472,598			360,658			805,338			689,208
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation awards		145,571			153,770			147,510			154,612
Less: Unvested stock-based compensation awards		(746	)		(913	)		(764	)		(974	)
Weighted-average shares outstanding		144,825			152,857			146,746			153,638
Basic earnings per common share	$	3.26			2.36			5.49			4.49

 (a)Including impact of not as yet declared cumulative dividends.

Computations of Diluted Earnings Per Common Share

The computations of diluted earnings per common share follow:

	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
	(In thousands, except per share)
Net income available to common equity	$	475,030			362,816			809,510			693,506
Less: Income attributable to unvested stock-based    compensation awards		(2,430	)		(2,154	)		(4,168	)		(4,289	)
Net income available to common shareholders	$	472,600			360,662			805,342			689,217
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards		145,571			153,770			147,510			154,612
Less: Unvested stock-based compensation awards		(746	)		(913	)		(764	)		(974	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		173			419			195			470
Adjusted weighted-average shares outstanding		144,998			153,276			146,941			154,108
Diluted earnings per common share	$	3.26			2.35			5.48			4.47

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Comprehensive income (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Components of Other Comprehensive Income (Loss) and Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Net Income

The following tables display the components of other comprehensive income (loss) and amounts reclassified from accumulated other comprehensive income (loss) to net income:

				Investment			Defined Benefit						Total Amount				Income
				Securities (a)			Plans			Other			Before Tax				Tax			Net
				(In thousands)
Balance — January 1, 2018				$	(59,957	)		(413,168	)		(20,165	)	$	(493,290	)			129,476		$	(363,814	)
Cumulative effect of change in accounting principle — equity     securities					(22,795	)		—			—			(22,795	)			5,942			(16,853	)
Other comprehensive income before reclassifications:
Unrealized holding gains (losses), net					(187,989	)		—			—			(187,989	)			49,414			(138,575	)
Foreign currency translation adjustment					—			—			(1,448	)		(1,448	)			304			(1,144	)
Unrealized losses on cash flow hedges					—			—			(21,065	)		(21,065	)			5,538			(15,527	)
Total other comprehensive income (loss) before    reclassifications					(187,989	)		—			(22,513	)		(210,502	)			55,256			(155,246	)
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease    net income:
Amortization of unrealized holding losses on    held-to-maturity (“HTM”) securities					1,590			—			—			1,590		(c)		(418	)		1,172
Gains realized in net income					(18	)		—			—			(18	)	(d)		4			(14	)
Accretion of net gain on terminated cash    flow hedges					—			—			(56	)		(56	)	(e)		15			(41	)
Net yield adjustment from cash flow    hedges currently in effect					—			—			3,469			3,469		(e)		(912	)		2,557
Amortization of prior service credit					—			(2,086	)		—			(2,086	)	(f)		549			(1,537	)
Amortization of actuarial losses					—			21,483			—			21,483		(f)		(5,648	)		15,835
Total other comprehensive income (loss)					(186,417	)		19,397			(19,100	)		(186,120	)			48,846			(137,274	)
Balance — June 30, 2018				$	(269,169	)		(393,771	)		(39,265	)	$	(702,205	)			184,264		$	(517,941	)
	Investment Securities						Defined Benefit						Total Amount				Income
	With OTTI (b)			All Other			Plans			Other			Before Tax				Tax			Net
	(In thousands)
Balance — January 1, 2017	$	46,725			(73,785	)		(449,917	)		(8,268	)	$	(485,245	)			190,609		$	(294,636	)
Other comprehensive income before reclassifications:
Unrealized holding gains (losses), net		(13,802	)		37,728			—			—			23,926				(9,404	)		14,522
Foreign currency translation adjustment		—			—			—			2,502			2,502				(876	)		1,626
Unrealized losses on cash flow hedges		—			—			—			(441	)		(441	)			174			(267	)
Total other comprehensive income (loss) before    reclassifications		(13,802	)		37,728			—			2,061			25,987				(10,106	)		15,881
Amounts reclassified from accumulated other    comprehensive income that (increase) decrease    net income:
Amortization of unrealized holding losses on    HTM securities		—			1,721			—			—			1,721		(c)		(677	)		1,044
(Gains) losses realized in net income		(50	)		67			—			—			17		(d)		(7	)		10
Accretion of net gain on terminated cash    flow hedges		—			—			—			(78	)		(78	)	(e)		31			(47	)
Net yield adjustment from cash flow    hedges currently in effect		—			—			—			(1,094	)		(1,094	)	(e)		430			(664	)
Amortization of prior service credit		—			—			(400	)		—			(400	)	(f)		157			(243	)
Amortization of actuarial losses		—			—			14,137			—			14,137		(f)		(5,563	)		8,574
Total other comprehensive income (loss)		(13,852	)		39,516			13,737			889			40,290				(15,735	)		24,555
Balance — June 30, 2017	$	32,873			(34,269	)		(436,180	)		(7,379	)	$	(444,955	)			174,874		$	(270,081	)

(a) Beginning January 1, 2018, equity securities with readily determinable fair values are required to be measured at fair value with changes in fair value recognized in the income statement. All investment securities with an other-than-temporary impairment charge are within scope of the adopted accounting guidance and no longer require separate presentation.

(b) Other-than-temporary impairment

(c) Included in interest income

(d) Included in gain (loss) on bank investment securities

(e) Included in interest expense

(f) Included in other costs of operations

Accumulated Other Comprehensive Income (Loss), Net

Accumulated other comprehensive income (loss), net consisted of the following:

	Investment			Defined Benefit
	Securities			Plans			Other			Total
	(In thousands)
Balance — December 31, 2017	$	(44,150	)		(304,546	)		(15,118	)	$	(363,814	)
Cumulative effect of change in accounting principle — equity securities		(16,853	)		—			—			(16,853	)
Net gain (loss) during period		(137,417	)		14,298			(14,155	)		(137,274	)
Balance — June 30, 2018	$	(198,420	)		(290,248	)		(29,273	)	$	(517,941	)

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Derivative financial instruments (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Information about Interest Rate Swap Agreements

Information about interest rate swap agreements entered into for interest rate risk management purposes summarized by type of financial instrument the swap agreements were intended to hedge follows:

	Notional		Average		Weighted- Average Rate						Estimated Fair
	Amount		Maturity		Fixed			Variable			ValueGain(Loss)(a)
	(In thousands)		(In years)								(In thousands)
June 30, 2018
Fair value hedges:
Fixed rate long-term borrowings (b)	$	4,700,000		2.7		2.41	%		2.72	%	$	(185	)
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(c)		7,700,000		1.4		1.52	%		1.98	%		56
Total	$	12,400,000		1.9							$	(129	)
December 31, 2017
Fair value hedges:
Fixed rate long-term borrowings (b)	$	4,550,000		2.9		2.27	%		2.09	%	$	573
Cash flow hedges:
Interest payments on variable rate          commercial real estate loans (b)(d)		4,850,000		2.0		1.52	%		1.36	%		66
Total	$	9,400,000		2.5							$	639

(a) Certain clearinghouse exchanges consider payments by counterparties for variation margin on derivative instruments to be settlements of those positions. The impact of such treatment at June 30, 2018 and December 31, 2017 was a reduction of the estimated fair value losses on interest rate swap agreements designated as fair value hedges of $96.1 million and $41.1 million, respectively, and on interest rate swap agreements designated as cash flow hedges of $33.9 million and $16.3 million, respectively.

(b) Under the terms of these agreements, the Company receives settlement amounts at a fixed rate and pays at a variable rate.

(c) Includes notional amount and terms of $4.85 billion of forward-starting interest rate swap agreements that will become effective in 2019 and 2020 upon maturity of a like amount of other swap agreements.

(d) Includes notional amount and terms of $2.0 billion of forward-starting interest rate swap agreements that will become effective in 2019 upon maturity of a like amount of other swap agreements.

Information about Fair Values of Derivative Instruments in Consolidated Balance Sheet

Information about the fair values of derivative instruments in the Company’s consolidated balance sheet and consolidated statement of income follows:

	Asset Derivatives				Liability Derivatives
	Fair Value				Fair Value
	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
	(In thousands)
Derivatives designated and qualifying as hedging instruments
Interest rate swap agreements (a)	$	397	$	639	$	526	$	—
Commitments to sell real estate loans (a)		3,872		734		4,696		283
		4,269		1,373		5,222		283
Derivatives not designated and qualifying as hedging instruments
Mortgage-related commitments to originate real estate loans for sale (a)		11,801		8,797		1,050		494
Commitments to sell real estate loans (a)		3,917		2,526		2,211		1,019
Trading:
Interest rate contracts (b)		72,973		74,164		274,959		132,104
Foreign exchange and other option and futures contracts (b)		8,514		5,657		6,579		5,286
		97,205		91,144		284,799		138,903
Total derivatives	$	101,474	$	92,517	$	290,021	$	139,186

(a) Asset derivatives are reported in other assets and liability derivatives are reported in other liabilities.

(b) Asset derivatives are reported in trading account assets and liability derivatives are reported in other liabilities.  The impact of variation margin payments at June 30, 2018 and December 31, 2017 was a reduction of the estimated fair value of interest rate contracts in the trading account in an asset position of $272.2 million and $136.2 million, respectively, and in a liability position of $4.0 million and $12.2 million, respectively.

	Carrying Amount of the Hedged Item				Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount of the Hedged Item
	(In thousands)
	June 30,		December 31,		June 30,			December 31,
	2018		2017		2018			2017
Location in the Consolidated Balance Sheet of    the Hedged Items in Fair Value Hedges
Long-term debt	$	4,598,712	$	4,504,029	$	(96,387	)	$	(40,133	)

Information about Fair Values of Derivative Instruments in Consolidated Statement of Income

	Amount of Gain (Loss) Recognized
	Three Months Ended June 30, 2018					Three Months Ended June 30, 2017
	Derivative			Hedged Item		Derivative			Hedged Item
	(In thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	(13,357	)		13,884	$	(5,795	)		5,011
Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	(2,686	)			$	831
Foreign exchange and other option and futures contracts (b)		2,365					1,568
Total	$	(321	)			$	2,399

9. Derivative financial instruments, continued

	Amount of Gain (Loss) Recognized
	Six Months Ended June 30, 2018					Six Months Ended June 30, 2017
	Derivative			Hedged item		Derivative			Hedged item
	(In thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	(55,747	)		56,254	$	(9,914	)		9,023
Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	(4,291	)			$	2,781
Foreign exchange and other option and futures contracts (b)		4,996					3,404
Total	$	705				$	6,185

(a) Effective January 1, 2018, reported as an adjustment to interest expense. Prior to 2018, reported as other revenues from operations.  

(b) Reported as trading account and foreign exchange gains.  

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Fair value measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Estimated Fair Value on Recurring Basis

The following tables present assets and liabilities at June 30, 2018 and December 31, 2017 measured at estimated fair value on a recurring basis:

	Fair Value Measurements		Level 1 (a)		Level 2 (a)		Level 3
	(In thousands)
June 30, 2018
Trading account assets	$	148,303	$	46,502	$	101,801	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		1,707,821		—		1,707,821		—
Obligations of states and political subdivisions		1,925		—		1,925		—
Mortgage-backed securities:
Government issued or guaranteed		7,817,299		—		7,817,299		—
Privately issued		24		—		—		24
Other debt securities		131,777		—		131,777		—
		9,658,846		—		9,658,822		24
Equity securities		86,482		65,748		20,734		—
Real estate loans held for sale		1,151,090		—		1,151,090		—
Other assets (b)		19,987		—		8,186		11,801
Total assets	$	11,064,708	$	112,250	$	10,940,633	$	11,825
Trading account liabilities	$	281,538	$	—	$	281,538	$	—
Other liabilities (b)		8,483		—		7,433		1,050
Total liabilities	$	290,021	$	—	$	288,971	$	1,050
December 31, 2017
Trading account assets	$	132,909	$	47,873	$	85,036	$	—
Investment securities available for sale:
U.S. Treasury and federal agencies		1,947,487		—		1,947,487		—
Obligations of states and political subdivisions		2,589		—		2,589		—
Mortgage-backed securities:
Government issued or guaranteed		8,716,392		—		8,716,392		—
Privately issued		28		—		—		28
Other debt securities		128,832		—		128,832		—
Equity securities		100,956		73,232		27,724		—
		10,896,284		73,232		10,823,024		28
Real estate loans held for sale		378,047		—		378,047		—
Other assets (b)		12,696		—		3,899		8,797
Total assets	$	11,419,936	$	121,105	$	11,290,006	$	8,825
Trading account liabilities	$	137,390	$	—	$	137,390	$	—
Other liabilities (b)		1,796		—		1,302		494
Total liabilities	$	139,186	$	—	$	138,692	$	494

(a) There were no significant transfers between Level 1 and Level 2 of the fair value hierarchy during the six months ended June 30, 2018 and the year ended December 31, 2017.                                        

(b) Comprised predominantly of interest rate swap agreements used for interest rate risk management (Level 2), commitments to sell real estate loans (Level 2) and commitments to originate real estate loans to be held for sale (Level 3).

Changes in Level 3 Assets and Liabilities Measured at Estimated Fair Value on Recurring Basis

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2018 were as follows:

	Investment Securities Available for Sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance - March 31, 2018	$	27			8,760
Total gains (losses) realized/unrealized:
Included in earnings		—			20,277		(b)
Settlements		(3	)		—
Transfers out of Level 3 (a)		—			(18,286	)	(c)
Balance — June 30, 2018	$	24			10,751
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2018	$	—			10,686		(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2017 were as follows:

	Investment Securities Available for Sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance - March 31, 2017	$	41			16,202
Total gains (losses) realized/unrealized:
Included in earnings		—			19,571		(b)
Settlements		(6	)		—
Transfers out of Level 3 (a)		—			(23,348	)	(c)
Balance — June 30, 2017	$	35			12,425
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2017	$	—			10,892		(b)

11. Fair value measurements, continued

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2018 were as follows:

	Investment securities available for sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance — January 1, 2018	$	28			8,303
Total gains (losses) realized/unrealized:
Included in earnings		—			28,407		(b)
Settlements		(4	)		—
Transfers out of Level 3 (a)		—			(25,959	)	(c)
Balance — June 30, 2018	$	24			10,751
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2018	$	—			10,686		(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2017 were as follows:

	Investment securities available for sale
	Privately Issued Mortgage-Backed Securities			Other Assets and Other Liabilities
	(In thousands)
Balance — January 1, 2017	$	44			7,325
Total gains (losses) realized/unrealized:
Included in earnings		—			43,511		(b)
Settlements		(9	)		—
Transfers out of Level 3 (a)		—			(38,411	)	(c)
Balance — June 30, 2017	$	35			12,425
Changes in unrealized gains included in earnings    related to assets still held at June 30, 2017	$	—			12,372		(b)

(a) The Company’s policy for transfers between fair value levels is to recognize the transfer as of the actual date of the event or change in circumstances that caused the transfer.

(b) Reported as mortgage banking revenues in the consolidated statement of income and includes the fair value of commitment issuances and expirations.

(c) Transfers out of Level 3 consist of interest rate locks transferred to closed loans.

Quantitative Information Related to Significant Unobservable Inputs

The following tables present quantitative information about significant unobservable inputs used in the fair value measurements for certain Level 3 assets and liabilities at June 30, 2018 and December 31, 2017:

	Fair Value		Valuation Technique	Unobservable Inputs/Assumptions		Range (Weighted- Average)
	(In thousands)
June 30, 2018
Recurring fair value measurements
Privately issued mortgage-backed    securities	$	24	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		10,751	Discounted cash flow	Commitment expirations		0%-90% (20%)
December 31, 2017
Recurring fair value measurements
Privately issued mortgage-backed    securities	$	28	Two independent pricing quotes		—		—
Net other assets (liabilities) (a)		8,303	Discounted cash flow	Commitment expirations		0%-78% (22%)

(a) Other Level 3 assets (liabilities) consist of commitments to originate real estate loans.

Carrying Amounts and Estimated Fair Value for Financial Instrument Assets (Liabilities)

The carrying amounts and estimated fair value for financial instrument assets (liabilities) are presented in the following table:

	June 30, 2018
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
	(In thousands)
Financial assets:
Cash and cash equivalents	$	1,369,094			1,369,094			1,258,614		110,480			—
Interest-bearing deposits at banks		6,669,985			6,669,985			—		6,669,985			—
Trading account assets		148,303			148,303			46,502		101,801			—
Investment securities		13,283,002			13,204,236			65,748		13,027,717			110,771
Loans and leases:
Commercial loans and leases		21,894,857			21,465,594			—		—			21,465,594
Commercial real estate loans		34,137,937			33,579,305			—		868,392			32,710,913
Residential real estate loans		18,310,712			18,110,823			—		4,128,794			13,982,029
Consumer loans		13,453,944			13,257,759			—		—			13,257,759
Allowance for credit losses		(1,019,248	)		—			—		—			—
Loans and leases, net		86,778,202			86,413,481			—		4,997,186			81,416,295
Accrued interest receivable		333,549			333,549			—		333,549			—
Financial liabilities:
Noninterest-bearing deposits	$	(32,086,191	)		(32,086,191	)		—		(32,086,191	)		—
Savings and interest-checking deposits		(51,107,290	)		(51,107,290	)		—		(51,107,290	)		—
Time deposits		(5,817,680	)		(5,865,067	)		—		(5,865,067	)		—
Deposits at Cayman Islands office		(261,427	)		(261,427	)		—		(261,427	)		—
Short-term borrowings		(3,239,416	)		(3,239,416	)		—		(3,239,416	)		—
Long-term borrowings		(8,382,316	)		(8,392,684	)		—		(8,392,684	)		—
Accrued interest payable		(87,779	)		(87,779	)		—		(87,779	)		—
Trading account liabilities		(281,538	)		(281,538	)		—		(281,538	)		—
Other financial instruments:
Commitments to originate real estate loans for sale	$	10,751			10,751			—		—			10,751
Commitments to sell real estate loans		882			882			—		882			—
Other credit-related commitments		(127,898	)		(127,898	)		—		—			(127,898	)
Interest rate swap agreements used for interest    rate risk management		(129	)		(129	)		—		(129	)		—

	December 31, 2017
	Carrying Amount			Estimated Fair Value			Level 1		Level 2			Level 3
				(In thousands)
Financial assets:
Cash and cash equivalents	$	1,420,888			1,420,888			1,352,035		68,853		—
Interest-bearing deposits at banks		5,078,903			5,078,903			—		5,078,903		—
Trading account assets		132,909			132,909			47,873		85,036		—
Investment securities		14,664,525			14,653,074			73,232		14,469,127			110,715
Loans and leases:
Commercial loans and leases		21,742,651			21,321,282		—		—				21,321,282
Commercial real estate loans		33,366,373			32,950,724		—			22,130			32,928,594
Residential real estate loans		19,613,344			19,596,826		—			4,440,645			15,156,181
Consumer loans		13,266,615			13,161,517		—			—			13,161,517
Allowance for credit losses		(1,017,198	)		—		—			—			—
Loans and leases, net		86,971,785			87,030,349		—			4,462,775			82,567,574
Accrued interest receivable		327,170			327,170		—			327,170			—
Financial liabilities:
Noninterest-bearing deposits	$	(33,975,180	)		(33,975,180	)	—			(33,975,180	)	—
Savings and interest-checking deposits		(51,698,008	)		(51,698,008	)	—			(51,698,008	)	—
Time deposits		(6,580,962	)		(6,635,048	)	—			(6,635,048	)	—
Deposits at Cayman Islands office		(177,996	)		(177,996	)	—			(177,996	)	—
Short-term borrowings		(175,099	)		(175,099	)	—			(175,099	)	—
Long-term borrowings		(8,141,430	)		(8,193,783	)	—			(8,193,783	)	—
Accrued interest payable		(75,641	)		(75,641	)	—			(75,641	)	—
Trading account liabilities		(137,390	)		(137,390	)	—			(137,390	)	—
Other financial instruments:
Commitments to originate real estate loans for sale	$	8,303			8,303		—			—			8,303
Commitments to sell real estate loans		1,958			1,958		—			1,958		—
Other credit-related commitments		(125,281	)		(125,281	)	—			—			(125,281	)
Interest rate swap agreements used for interest    rate risk management		639			639		—			639		—

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Commitments and contingencies (Tables)

6 Months Ended

Jun. 30, 2018

Commitments And Contingencies Disclosure [Abstract]

Company's Significant Commitments

The following table presents the Company's significant commitments.  Certain of these commitments are not included in the Company's consolidated balance sheet.

	June 30,		December 31,
	2018		2017
	(In thousands)
Commitments to extend credit
Home equity lines of credit	$	5,474,798		5,482,622
Commercial real estate loans to be sold		323,750		194,763
Other commercial real estate		5,855,075		6,050,569
Residential real estate loans to be sold		361,034		347,113
Other residential real estate		240,020		201,426
Commercial and other		13,247,615		12,733,815
Standby letters of credit		2,410,569		2,497,844
Commercial letters of credit		55,655		46,739
Financial guarantees and indemnification contracts		3,458,625		3,434,381
Commitments to sell real estate loans		1,725,093		812,217

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Segment information (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Information about Company's Segments

Information about the Company's segments is presented in the following table:

	Three Months Ended June 30
	2018							2017
	Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)		Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)
	(In thousands)
Business Banking	$	136,029		912			43,007	$	124,982		1,006			28,750
Commercial Banking		269,499		928			126,391		277,116		843			105,627
Commercial Real Estate		205,541		385			112,691		197,298		357			87,271
Discretionary Portfolio		58,976		(10,554	)		29,113		72,044		(12,397	)		29,740
ResidentialMortgageBanking		82,167		16,047			15,402		88,700		18,144			13,742
Retail Banking		420,540		2,707			143,089		383,904		3,045			100,094
All Other		293,449		(10,425	)		23,467		254,972		(10,998	)		15,829
Total	$	1,466,201		—			493,160	$	1,399,016		—			381,053

	Six Months Ended June 30
	2018								2017
	Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)			Total Revenues(a)		Inter- segment Revenues			Net Income (Loss)
	(In thousands)
Business Banking	$	263,913		1,830			80,725		$	245,315		1,917			53,738
Commercial Banking		535,895		1,778			251,856			551,024		1,763			218,414
Commercial Real Estate		408,148		725			220,994			392,423		764			171,818
Discretionary Portfolio		109,014		(21,386	)		48,852			150,990		(25,324	)		63,685
Residential Mortgage Banking		164,625		31,468			30,348			174,102		36,355			23,660
Retail Banking		814,016		5,572			266,469			752,422		6,092			186,285
All Other		604,803		(19,987	)		(53,474	)		493,845		(21,567	)		12,380
Total	$	2,900,414		—			845,770		$	2,760,121		—			729,980

13. Segment information, continued

	Average Total Assets
	Six Months Ended June 30				Year Ended December 31
	2018		2017		2017
	(In millions)
Business Banking	$	5,656		5,595		5,602
Commercial Banking		26,542		26,802		26,573
Commercial Real Estate		22,848		22,875		22,741
Discretionary Portfolio		33,277		38,341		37,203
Residential Mortgage Banking		2,186		2,341		2,355
Retail Banking		13,403		12,337		12,702
All Other		13,109		13,574		13,684
Total	$	117,021		121,865		120,860

(a) Total revenues are comprised of net interest income and other income.  Net interest income is the difference between taxable-equivalent interest earned on assets and interest paid on liabilities owed by a segment and a funding charge (credit) based on the Company's internal funds transfer and allocation methodology.  Segments are charged a cost to fund any assets (e.g. loans) and are paid a funding credit for any funds provided (e.g. deposits).  The taxable-equivalent adjustment aggregated $5,397,000 and $8,736,000 for the three-month periods ended June 30, 2018 and 2017, respectively, and $10,206,000 and $16,735,000 for the six-month periods ended June 30, 2018 and 2017, respectively, and is eliminated in "All Other" total revenues.  Intersegment revenues are included in total revenues of the reportable segments.  The elimination of intersegment revenues is included in the determination of "All Other" total revenues.

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Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2018

ASU 2014-09 [Member]

Summary of Sources of M&T's Noninterest Income that are Subject to the Amended Guidance

The following tables summarize sources of M&T’s noninterest income during 2018 that are subject to the amended guidance.

	Three Months Ended June 30, 2018
	Business Banking		Commercial Banking		Commercial Real Estate		Discretionary Portfolio		Residential Mortgage Banking		Retail Banking		All Other		Total
	(In thousands)
Classification in consolidated statement of    income
Service charges on deposit accounts	$	15,611		24,270		2,451		—		3		63,015		1,434	$	106,784
Trust income		—		—		—		—		—		—		137,641		137,641
Brokerage services income		—		—		—		—		—		—		12,629		12,629
Other revenues from operations:
Merchant discount and credit card fees		8,334		12,542		428		—		—		4,140		618		26,062
Other		—		3,646		2,215		413		927		9,613		7,598		24,412
	$	23,945		40,458		5,094		413		930		76,768		159,920	$	307,528

15. Revenue from contracts with customers, continued

	Six Months Ended June 30, 2018
	Business Banking		Commercial Banking		Commercial Real Estate		Discretionary Portfolio		Residential Mortgage Banking		Retail Banking		All Other		Total
	(In thousands)
Classification in consolidated statement of    income
Service charges on deposit accounts	$	31,015		48,924		5,215		—		6		123,616		3,123	$	211,899
Trust income		—		—		—		—		—		—		269,016		269,016
Brokerage services income		—		—		—		—		—		—		26,021		26,021
Other revenues from operations:
Merchant discount and credit card fees		15,837		25,254		982		—		—		7,528		1,233		50,834
Other		—		5,209		3,074		865		1,970		19,478		16,706		47,302
	$	46,852		79,387		9,271		865		1,976		150,622		316,099	$	605,072

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Investment Securities - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) Security	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Security	Jun. 30, 2017 USD ($)
Investment Holdings [Line Items]
Gain (loss) on bank investment securities	$ 2,326,000	$ (17,000)	$ (7,105,000)	$ (17,000)
Gross realized gains(loss) on sale of investment securities	$ 0	$ 0	$ 0	$ 0
Number of debt securities with aggregate gross unrealized losses | Security	1,487		1,487
Unrealized losses on individual debt securities	$ 366,000,000		$ 366,000,000
Cost method equity securities	437,000,000		437,000,000
Retained Earnings [Member] | Adjustments for New Accounting Pronouncement [Member]
Investment Holdings [Line Items]
Reclassification from accumulated comprehensive income to retained earnings, net of tax	$ 17,000,000		$ 17,000,000

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Investment Securities - Amortized Cost and Estimated Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	$ 9,912,160	$ 10,938,796
Investment securities available for sale, gross unrealized gains	17,762	85,154
Investment securities available for sale, gross unrealized losses	271,076	127,666
Investment securities available for sale, estimated fair value	9,658,846	10,896,284
Amortized cost for held to maturity	3,101,095	3,353,213
Gross unrealized gains for held to maturity	16,047	29,919
Gross unrealized losses for held to maturity	94,813	41,370
Estimated fair value for held to maturity	3,022,329	3,341,762
Equity and other securities, Amortized Cost	507,389	415,028
Equity securities, Gross Unrealized Gains	16,527
Equity securities, Gross Unrealized Losses	855
Equity and other securities, Estimated Fair Value	523,061	415,028
Other securities, Amortized cost	436,579	415,028
Other securities, Estimated fair value	436,579	415,028
Total debt securities Amortized cost	13,013,255
Total debt securities Gross unrealized gains	33,809
Total debt securities Gross unrealized losses	365,889
Total debt securities Estimated fair value	12,681,175
Readily marketable securities Amortized cost	70,810
Readily marketable securities Gross unrealized gains	16,527
Readily marketable securities Gross unrealized losses	855
Readily marketable securities Estimated fair value	86,482
Total Amortized cost		14,707,037
Total for Gross unrealized gains		115,073
Total for Gross unrealized losses		169,036
Total for Estimated fair value		14,653,074
U.S. Treasury and Federal Agencies [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	1,726,242	1,965,665
Investment securities available for sale, gross unrealized gains	4
Investment securities available for sale, gross unrealized losses	18,425	18,178
Investment securities available for sale, estimated fair value	1,707,821	1,947,487
Obligations of States and Political Subdivisions [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	1,914	2,555
Investment securities available for sale, gross unrealized gains	12	36
Investment securities available for sale, gross unrealized losses	1	2
Investment securities available for sale, estimated fair value	1,925	2,589
Amortized cost for held to maturity	13,547	24,562
Gross unrealized gains for held to maturity	57	109
Gross unrealized losses for held to maturity	20	49
Estimated fair value for held to maturity	13,584	24,622
Government Issued or Guaranteed [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	8,046,603	8,755,482
Investment securities available for sale, gross unrealized gains	15,521	59,497
Investment securities available for sale, gross unrealized losses	244,825	98,587
Investment securities available for sale, estimated fair value	7,817,299	8,716,392
Amortized cost for held to maturity	2,960,045	3,187,953
Gross unrealized gains for held to maturity	4,539	27,236
Gross unrealized losses for held to maturity	71,183	13,746
Estimated fair value for held to maturity	2,893,401	3,201,443
Privately Issued [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	26	28
Investment securities available for sale, gross unrealized losses	2
Investment securities available for sale, estimated fair value	24	28
Amortized cost for held to maturity	122,906	135,688
Gross unrealized gains for held to maturity	11,451	2,574
Gross unrealized losses for held to maturity	23,610	27,575
Estimated fair value for held to maturity	110,747	110,687
Other Debt Securities [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost	137,375	136,905
Investment securities available for sale, gross unrealized gains	2,225	2,402
Investment securities available for sale, gross unrealized losses	7,823	10,475
Investment securities available for sale, estimated fair value	131,777	128,832
Amortized cost for held to maturity	4,597	5,010
Estimated fair value for held to maturity	$ 4,597	5,010
Equity Securities [Member]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Investment securities available for sale, amortized cost		78,161
Investment securities available for sale, gross unrealized gains		23,219
Investment securities available for sale, gross unrealized losses		424
Investment securities available for sale, estimated fair value		$ 100,956

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Investment Securities - Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt securities available for sale:
Due in one year or less	$ 1,297,040
Due after one year through five years	436,548
Due after five years through ten years	96,521
Due after ten years	35,422
Total available for sale (amortized cost)	1,865,531
Mortgage-backed securities available for sale	8,046,629
Total	9,912,160
Debt securities held to maturity:
Due in one year or less	7,630
Due after one year through five years	5,917
Due after ten years	4,597
Total available for held to maturity (amortized cost)	18,144
Mortgage-backed securities held to maturity	3,082,951
Amortized cost for held to maturity	3,101,095	$ 3,353,213
Debt securities available for sale:
Due in one year or less	1,286,504
Due after one year through five years	428,617
Due after five years through ten years	95,992
Due after ten years	30,410
Total available for sale (fair value)	1,841,523
Mortgage-backed securities available for sale	7,817,323
Total	9,658,846
Debt securities held to maturity:
Due in one year or less	7,633
Due after one year through five years	5,951
Due after ten years	4,597
Total available for held to maturity (fair value)	18,181
Mortgage-backed securities held to maturity	3,004,148
Total	$ 3,022,329	$ 3,341,762

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Investment Securities - Investment Securities in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, Less than 12 months	$ 4,041,583	$ 2,387,341
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(92,801)	(15,482)
Estimated fair value, 12 months or more	4,512,045	4,887,991
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(178,275)	(112,184)
Held to maturity, Estimated fair value, Less than 12 months	2,252,672	1,339,774
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses	(58,405)	(8,256)
Held to maturity, Estimated fair value, 12 months or more	308,138	327,060
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses	(36,408)	(33,114)
Total investment securities, fair value less than 12 months	6,294,255	3,727,115
Investment Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses	(151,206)	(23,738)
Total of investment securities, fair value, 12 Months or More	4,820,183	5,215,051
Investment Securities Continuous Unrealized Loss Position Twelve Months or Longer Aggregate Losses	(214,683)	(145,298)
U.S. Treasury and Federal Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, Less than 12 months	164,931	278,132
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(1,622)	(1,761)
Estimated fair value, 12 months or more	1,539,796	1,669,355
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(16,803)	(16,417)
Obligations of States and Political Subdivisions [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, 12 months or more	375	474
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(1)	(2)
Held to maturity, Estimated fair value, Less than 12 months		2,954
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses		(4)
Held to maturity, Estimated fair value, 12 months or more	4,218	6,110
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses	(20)	(45)
Government Issued or Guaranteed [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, Less than 12 months	3,872,321	2,106,142
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(91,083)	(13,695)
Estimated fair value, 12 months or more	2,907,972	3,138,841
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(153,742)	(84,892)
Held to maturity, Estimated fair value, Less than 12 months	2,252,672	1,331,759
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses	(58,405)	(7,036)
Held to maturity, Estimated fair value, 12 months or more	250,341	265,695
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses	(12,778)	(6,710)
Privately Issued [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, Less than 12 months	8
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(2)
Held to maturity, Estimated fair value, Less than 12 months		5,061
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses		(1,216)
Held to maturity, Estimated fair value, 12 months or more	53,579	55,255
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses	(23,610)	(26,359)
Other Debt Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, Less than 12 months	4,323	3,067
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(94)	(26)
Estimated fair value, 12 months or more	63,902	61,159
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	$ (7,729)	(10,449)
Equity Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated fair value, 12 months or more		18,162
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses		$ (424)

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Loans and Leases and the Allowance for Credit Losses - Summary of Current, Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 85,328,234	$ 85,325,604
30-89 Days Past Due	1,026,336	1,078,943
Accruing Loans Past Due 90 Days or More	223,026	244,405
Purchased Impaired	352,465	410,015
Nonaccrual	819,984	882,598
Loans and leases, net of unearned discount	87,797,450	87,988,983
Accruing Loans Acquired at Discount [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans Past Due 90 Days or More	47,405	47,418
Commercial, Financial, Leasing, etc. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	21,615,676	21,332,234
30-89 Days Past Due	29,906	167,756
Accruing Loans Past Due 90 Days or More	4,210	1,322
Purchased Impaired	3	21
Nonaccrual	245,031	240,991
Loans and leases, net of unearned discount	21,894,857	21,742,651
Commercial, Financial, Leasing, etc. [Member] | Accruing Loans Acquired at Discount [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans Past Due 90 Days or More	31	327
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	25,352,075	24,910,381
30-89 Days Past Due	212,480	166,305
Accruing Loans Past Due 90 Days or More	10,621	4,444
Purchased Impaired	10,579	16,815
Nonaccrual	153,552	184,982
Loans and leases, net of unearned discount	25,743,637	25,288,943
Commercial [Member] | Accruing Loans Acquired at Discount [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans Past Due 90 Days or More	4,330	6,016
Residential Builder and Developer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,628,793	1,618,973
30-89 Days Past Due	8,668	5,159
Purchased Impaired	547	1,135
Nonaccrual	5,212	6,451
Loans and leases, net of unearned discount	1,643,220	1,631,718
Other Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	6,597,814	6,407,451
30-89 Days Past Due	140,490	23,467
Accruing Loans Past Due 90 Days or More	4,000
Purchased Impaired	1,053	4,706
Nonaccrual	7,723	10,088
Loans and leases, net of unearned discount	6,751,080	6,445,712
Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	14,456,180	15,376,759
30-89 Days Past Due	425,894	474,372
Accruing Loans Past Due 90 Days or More	200,159	233,437
Purchased Impaired	244,865	282,102
Nonaccrual	215,850	235,834
Loans and leases, net of unearned discount	15,550,967	16,610,086
Residential [Member] | Accruing Loans Acquired at Discount [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans Past Due 90 Days or More	8,019	7,582
Residential Limited Documentation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	2,488,340	2,718,019
30-89 Days Past Due	79,179	83,898
Purchased Impaired	95,418	105,236
Nonaccrual	96,808	96,105
Loans and leases, net of unearned discount	2,759,745	3,003,258
Home Equity Lines and Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,931,331	5,171,345
30-89 Days Past Due	29,589	38,546
Accruing Loans Past Due 90 Days or More	49
Nonaccrual	66,690	74,500
Loans and leases, net of unearned discount	5,034,515	5,293,782
Home Equity Lines and Loans [Member] | Accruing Loans Acquired at Discount [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans Past Due 90 Days or More	6,856	9,391
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	3,450,113	3,441,371
30-89 Days Past Due	69,398	78,511
Nonaccrual	19,564	23,781
Loans and leases, net of unearned discount	3,539,075	3,543,663
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,807,912	4,349,071
30-89 Days Past Due	30,732	40,929
Accruing Loans Past Due 90 Days or More	3,987	5,202
Nonaccrual	9,554	9,866
Loans and leases, net of unearned discount	4,880,354	4,429,170
Other [Member] | Accruing Loans Acquired at Discount [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans Past Due 90 Days or More	$ 28,169	$ 24,102

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Loans and Leases and the Allowance for Credit Losses - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Loans And Leases Receivable [Line Items]
Commercial real estate loans held for sale	$ 868	$ 22
Contractual principal and interest payments	$ 352	410
Minimum delinquency period for loan level collectability analysis consumer mortgage	150 days
Amount of foreclosed residential real estate property held	$ 97	108
Loans secured by residential real estate that were in the process of foreclosure	$ 433	497
Percentage loans in the process of foreclosure, serviced by other entities, classified as purchased impaired	41.00%
Percentage loans in the process of foreclosure, serviced by other entities, classified as government guaranteed	21.00%
Residential Mortgage Loans [Member]
Loans And Leases Receivable [Line Items]
Mortgage loans held for sale	$ 283	356
Carrying value of loans for which partial charge-off has been recognized	32	34
Mortgage loans on real real estate not requiring charge off due to collateral carrying amount	15	20
Home Equity Loans and Lines of Credit [Member]
Loans And Leases Receivable [Line Items]
Carrying value of loans for which partial charge-off has been recognized	25	25
Mortgage loans on real real estate not requiring charge off due to collateral carrying amount	$ 30	$ 32
Maximum [Member]
Loans And Leases Receivable [Line Items]
Purchased impaired loans as a percentage of total assets	1.00%	1.00%
Minimum [Member]
Loans And Leases Receivable [Line Items]
Loan delinquent period	90 days

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Loans and Leases and the Allowance for Credit Losses - Outstanding Principal Balance and Carrying Amount of Loans and Included in Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Outstanding principal and carrying value of acquired loans recorded at fair value
Outstanding principal balance	$ 1,213,758	$ 1,394,188
Carrying amount	863,782	1,003,399
Commercial, Financial, Leasing, etc. [Member]
Outstanding principal and carrying value of acquired loans recorded at fair value
Carrying amount	27,726	31,105
Commercial Real Estate [Member]
Outstanding principal and carrying value of acquired loans recorded at fair value
Carrying amount	183,126	228,054
Residential Real Estate [Member]
Outstanding principal and carrying value of acquired loans recorded at fair value
Carrying amount	545,438	620,827
Consumer [Member]
Outstanding principal and carrying value of acquired loans recorded at fair value
Carrying amount	$ 107,492	$ 123,413

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Loans and Leases and the Allowance for Credit Losses - Summary of Changes in Accretable Yield for Acquired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Purchased Impaired [Member]
Summary of changes in Accretable Yield for acquired loans
Balance at beginning of period	$ 149,007	$ 143,454	$ 157,918	$ 154,233
Interest income	(7,969)	(10,806)	(17,788)	(21,731)
Reclassifications from nonaccretable balance	8,350	884	9,258	1,030
Balance at end of period	149,388	133,532	149,388	133,532
Other Acquired [Member]
Summary of changes in Accretable Yield for acquired loans
Balance at beginning of period	118,184	181,310	133,162	201,153
Interest income	(15,394)	(20,923)	(30,506)	(46,441)
Reclassifications from nonaccretable balance	10,998	1,852	11,205	5,035
Other	3,927	860	3,854	3,352
Balance at end of period	$ 117,715	$ 163,099	$ 117,715	$ 163,099

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Loans and Leases and the Allowance for Credit Losses - Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 1,019,671	$ 1,001,430	$ 1,017,198	$ 988,997
Provision for credit losses	35,000	52,000	78,000	107,000
Net charge-offs
Charge-offs	(57,447)	(61,682)	(114,199)	(124,246)
Recoveries	22,024	16,477	38,249	36,474
Net charge-offs	(35,423)	(45,205)	(75,950)	(87,772)
Ending balance	1,019,248	1,008,225	1,019,248	1,008,225
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	326,071	347,760	328,599	330,833
Provision for credit losses	11,250	13,368	18,480	42,191
Net charge-offs
Charge-offs	(14,900)	(25,247)	(29,481)	(41,604)
Recoveries	6,409	3,433	11,232	7,894
Net charge-offs	(8,491)	(21,814)	(18,249)	(33,710)
Ending balance	328,830	339,314	328,830	339,314
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	367,717	360,010	374,085	362,719
Provision for credit losses	(10,845)	7,638	(16,070)	8,900
Net charge-offs
Charge-offs	(4,548)	(1,853)	(5,914)	(7,298)
Recoveries	1,437	434	1,660	1,908
Net charge-offs	(3,111)	(1,419)	(4,254)	(5,390)
Ending balance	353,761	366,229	353,761	366,229
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	73,047	62,012	65,405	61,127
Provision for credit losses	5,242	7,163	15,728	12,800
Net charge-offs
Charge-offs	(3,966)	(5,899)	(8,320)	(12,158)
Recoveries	1,800	2,730	3,310	4,237
Net charge-offs	(2,166)	(3,169)	(5,010)	(7,921)
Ending balance	76,123	66,006	76,123	66,006
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	173,841	153,172	170,809	156,288
Provision for credit losses	30,801	24,190	60,615	43,022
Net charge-offs
Charge-offs	(34,033)	(28,683)	(70,484)	(63,186)
Recoveries	12,378	9,880	22,047	22,435
Net charge-offs	(21,655)	(18,803)	(48,437)	(40,751)
Ending balance	182,987	158,559	182,987	158,559
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	78,995	78,476	78,300	78,030
Provision for credit losses	(1,448)	(359)	(753)	87
Net charge-offs
Ending balance	$ 77,547	$ 78,117	$ 77,547	$ 78,117

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Loans and Leases and the Allowance for Credit Losses - Impaired Loans and Leases (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	$ 507,795	$ 499,152
Unpaid principal balance with related allowance	607,159	585,903
Related allowance	67,495	75,762
Recorded investment with no related allowance	231,498	261,157
Unpaid principal balance with no related allowance	282,712	314,587
Recorded investment	739,293	760,309
Unpaid principal balance	889,871	900,490
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	85,588	67,199
Unpaid principal balance with related allowance	96,221	75,084
Related allowance	9,316	9,140
Recorded investment with no related allowance	89,024	138,356
Unpaid principal balance with no related allowance	99,658	149,716
Recorded investment	174,612	205,555
Unpaid principal balance	195,879	224,800
Automobile [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	12,467	13,498
Unpaid principal balance with related allowance	15,396	15,737
Related allowance	2,595	2,811
Recorded investment	12,467	13,498
Unpaid principal balance	15,396	15,737
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	157,228	177,250
Unpaid principal balance with related allowance	180,016	194,257
Related allowance	37,589	45,488
Recorded investment with no related allowance	112,604	89,126
Unpaid principal balance with no related allowance	139,843	115,327
Recorded investment	269,832	266,376
Unpaid principal balance	319,859	309,584
Residential Builder and Developer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	6,085	5,320
Unpaid principal balance with related allowance	6,465	5,641
Related allowance	211	308
Recorded investment with no related allowance	4,353	5,057
Unpaid principal balance with no related allowance	4,471	5,296
Recorded investment	10,438	10,377
Unpaid principal balance	10,936	10,937
Other Commercial Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	1,829	4,817
Unpaid principal balance with related allowance	17,670	20,357
Related allowance	345	647
Recorded investment with no related allowance	6,021	5,456
Unpaid principal balance with no related allowance	9,726	9,130
Recorded investment	7,850	10,273
Unpaid principal balance	27,396	29,487
Residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	117,111	101,724
Unpaid principal balance with related allowance	139,966	122,602
Related allowance	4,068	4,000
Recorded investment with no related allowance	12,665	13,574
Unpaid principal balance with no related allowance	17,161	18,980
Recorded investment	129,776	115,298
Unpaid principal balance	157,127	141,582
Residential Limited Documentation [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	76,040	77,277
Unpaid principal balance with related allowance	91,851	92,439
Related allowance	4,000	3,900
Recorded investment with no related allowance	6,831	9,588
Unpaid principal balance with no related allowance	11,853	16,138
Recorded investment	82,871	86,865
Unpaid principal balance	103,704	108,577
Home Equity Lines and Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	48,436	48,847
Unpaid principal balance with related allowance	53,538	53,914
Related allowance	8,757	8,812
Recorded investment	48,436	48,847
Unpaid principal balance	53,538	53,914
Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with related allowance	3,011	3,220
Unpaid principal balance with related allowance	6,036	5,872
Related allowance	614	656
Recorded investment	3,011	3,220
Unpaid principal balance	$ 6,036	$ 5,872

XML

Loans and Leases and the Allowance for Credit Losses - Interest Income Recognized on Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	$ 729,881	$ 729,652	$ 737,845	$ 743,728
Interest income recognized, Total	9,700	5,844	19,671	12,455
Interest income recognized, Cash basis	6,540	3,231	13,860	7,240
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	168,224	200,005	175,035	191,935
Interest income recognized, Total	3,811	813	6,958	1,788
Interest income recognized, Cash basis	3,811	813	6,958	1,788
Commercial, Financial, Leasing, etc. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	271,413	230,767	271,793	251,352
Interest income recognized, Total	1,333	805	2,116	1,283
Interest income recognized, Cash basis	1,333	805	2,116	1,283
Residential Builder and Developer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	8,494	15,577	9,167	17,552
Interest income recognized, Total		467	1,682	896
Interest income recognized, Cash basis		467	1,682	896
Other Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	7,443	14,213	8,773	14,922
Interest income recognized, Total	53	86	59	933
Interest income recognized, Cash basis	53	86	59	933
Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	126,185	108,036	123,697	106,166
Interest income recognized, Total	2,329	1,465	4,231	3,101
Interest income recognized, Cash basis	937	606	1,839	1,380
Residential Limited Documentation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	83,776	95,208	84,686	96,033
Interest income recognized, Total	1,428	1,449	3,156	2,949
Interest income recognized, Cash basis	317	339	1,013	723
Home Equity Lines and Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	48,644	46,872	48,721	46,327
Interest income recognized, Total	433	422	847	821
Interest income recognized, Cash basis	72	91	158	191
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	12,636	15,506	12,881	15,931
Interest income recognized, Total	225	262	449	537
Interest income recognized, Cash basis	14	21	29	40
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	3,066	3,468	3,092	3,510
Interest income recognized, Total	88	75	173	147
Interest income recognized, Cash basis	$ 3	$ 3	$ 6	$ 6

XML

Loans and Leases and the Allowance for Credit Losses - Summary of Loan Grades (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	$ 87,797,450	$ 87,988,983
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	21,894,857	21,742,651
Commercial, Financial, Leasing, etc. [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	20,769,679	20,490,486
Commercial, Financial, Leasing, etc. [Member] | Criticized Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	880,147	1,011,174
Commercial, Financial, Leasing, etc. [Member] | Criticized Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	245,031	240,991
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	25,743,637	25,288,943
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	24,954,015	24,380,184
Commercial [Member] | Criticized Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	636,070	723,777
Commercial [Member] | Criticized Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	153,552	184,982
Residential Builder and Developer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,643,220	1,631,718
Residential Builder and Developer [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	1,503,766	1,485,148
Residential Builder and Developer [Member] | Criticized Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	134,242	140,119
Residential Builder and Developer [Member] | Criticized Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	5,212	6,451
Other Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	6,751,080	6,445,712
Other Commercial Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	6,594,613	6,270,812
Other Commercial Construction [Member] | Criticized Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	148,744	164,812
Other Commercial Construction [Member] | Criticized Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	$ 7,723	$ 10,088

XML

Loans and Leases and the Allowance for Credit Losses - Allocation of Allowance for Credit Losses on Basis of Company's Impairment Methodology (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	$ 67,495		$ 75,762
Allowance for credit losses	861,150		853,276
Allowance for credit losses	1,019,248	$ 1,019,671	1,017,198	$ 1,008,225	$ 1,001,430	$ 988,997
Purchased Impaired [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	13,056		9,860
Allocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	941,701		938,898
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	77,547	$ 78,995	78,300	$ 78,117	$ 78,476	$ 78,030
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	37,589		45,488
Allowance for credit losses	291,241		283,111
Commercial, Financial, Leasing, etc. [Member] | Allocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	328,830		328,599
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	9,872		10,095
Allowance for credit losses	343,889		363,990
Commercial Real Estate [Member] | Allocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	353,761		374,085
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	8,068		7,900
Allowance for credit losses	54,999		47,645
Residential Real Estate [Member] | Purchased Impaired [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	13,056		9,860
Residential Real Estate [Member] | Allocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	76,123		65,405
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	11,966		12,279
Allowance for credit losses	171,021		158,530
Consumer Loans [Member] | Allocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	$ 182,987		$ 170,809

XML

Loans and Leases and the Allowance for Credit Losses - Recorded Investment in Loans and Leases on Basis of Company's Impairment Methodology (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	$ 87,797,450	$ 87,988,983
Individually Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	739,293	760,309
Collectively Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	86,705,692	86,818,659
Purchased Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	352,465	410,015
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	21,894,857	21,742,651
Commercial, Financial, Leasing, etc. [Member] | Individually Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	269,832	266,376
Commercial, Financial, Leasing, etc. [Member] | Collectively Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	21,625,022	21,476,254
Commercial, Financial, Leasing, etc. [Member] | Purchased Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	3	21
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	34,137,937	33,366,373
Commercial Real Estate [Member] | Individually Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	192,900	226,205
Commercial Real Estate [Member] | Collectively Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	33,932,858	33,117,512
Commercial Real Estate [Member] | Purchased Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	12,179	22,656
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	18,310,712	19,613,344
Residential Real Estate [Member] | Individually Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	212,647	202,163
Residential Real Estate [Member] | Collectively Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	17,757,782	19,023,843
Residential Real Estate [Member] | Purchased Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	340,283	387,338
Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	13,453,944	13,266,615
Consumer Loans [Member] | Individually Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	63,914	65,565
Consumer Loans [Member] | Collectively Evaluated for Impairment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases, net of unearned discount	$ 13,390,030	$ 13,201,050

XML

Loans and Leases and the Allowance for Credit Losses - Loan Modification Activities that were Considered Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) Modification	Jun. 30, 2017 USD ($) Modification	Jun. 30, 2018 USD ($) Modification	Jun. 30, 2017 USD ($) Modification
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	137	191	287	359
Pre-modification Recorded Investment	$ 58,013	$ 105,222	$ 128,015	$ 149,914
Post- modification	$ 58,909	$ 89,163	$ 131,531	$ 129,055
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	28	30	48	50
Pre-modification Recorded Investment	$ 7,200	$ 26,045	$ 13,980	$ 32,747
Post- modification	7,945	26,058	14,696	32,655
Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	20,384	24,087	70,040	37,734
Principal Deferral [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	7,376	11,782	13,200	14,773
Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	204		828
Interest Rate Reduction [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	175		175
Other [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	6,505	5,556	6,505	6,853
Other [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	394		394
Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	$ 31,816	59,520	54,158	84,468
Combination of Concession Types [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Post- modification		$ 14,276	$ 927	$ 17,882
Commercial, Financial, Leasing, etc. [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	47	63	103	113
Pre-modification Recorded Investment	$ 41,390	$ 65,613	$ 89,384	$ 77,534
Post- modification	40,834	48,960	90,178	56,883
Commercial, Financial, Leasing, etc. [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	9,673	8,172	45,346	12,561
Commercial, Financial, Leasing, etc. [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	29		653
Commercial, Financial, Leasing, etc. [Member] | Other [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	6,111	5,556	6,111	6,362
Commercial, Financial, Leasing, etc. [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	$ 25,021	$ 35,232	$ 38,068	$ 37,960
Residential Builder and Developer [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification				3
Pre-modification Recorded Investment				$ 12,291
Post- modification				10,879
Residential Builder and Developer [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
Post- modification				$ 10,879
Other Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification		1	1	2
Pre-modification Recorded Investment		$ 66	$ 752	$ 168
Post- modification		66	746	168
Other Commercial Construction [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Post- modification		$ 66	$ 746	$ 168
Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	30	30	77	71
Pre-modification Recorded Investment	$ 7,951	$ 7,956	$ 20,587	$ 17,336
Post- modification	8,580	8,468	22,427	18,416
Residential [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	2,814	2,982	9,759	8,575
Residential [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	$ 5,766	$ 5,486	$ 12,668	$ 9,841
Residential Limited Documentation [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	3	7	5	13
Pre-modification Recorded Investment	$ 584	$ 1,831	$ 879	$ 3,209
Post- modification	658	1,895	1,043	3,420
Residential Limited Documentation [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	200	235	467	235
Residential Limited Documentation [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	$ 458	$ 1,660	$ 576	$ 3,185
Home Equity Lines and Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	10	35	24	60
Pre-modification Recorded Investment	$ 555	$ 3,229	$ 1,903	$ 5,731
Post- modification	559	3,234	1,911	5,736
Home Equity Lines and Loans [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Post- modification		416	4	579
Home Equity Lines and Loans [Member] | Other [Member]
Financing Receivable, Modifications [Line Items]
Post- modification				491
Home Equity Lines and Loans [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	$ 559	$ 2,818	$ 1,907	$ 4,666
Other [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification		3	2	5
Pre-modification Recorded Investment		$ 54	$ 49	$ 80
Post- modification		54	49	80
Other [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Post- modification		$ 54	$ 49	$ 80
Automobile [Member]
Financing Receivable, Modifications [Line Items]
Number of modifications | Modification	19	22	27	42
Pre-modification Recorded Investment	$ 333	$ 428	$ 481	$ 818
Post- modification	333	428	481	818
Automobile [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	321	380	469	763
Automobile [Member] | Combination of Concession Types [Member]
Financing Receivable, Modifications [Line Items]
Post- modification	$ 12	$ 48	$ 12	$ 55

XML

Borrowings - Additional Information (Detail) - USD ($) $ in Millions		1 Months Ended	6 Months Ended
	Jul. 31, 2018	Jan. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Junior subordinated debentures			$ 521
Debt Maturity, Start Year			Jan. 01, 2027
Debt Maturity, End Year			Dec. 31, 2033
Agreements to repurchase securities			$ 416	$ 422
Collateral posted			$ 433	$ 442
Bank Note Program [Member]
Debt Instrument [Line Items]
Senior notes		$ 1,000
Debt instrument maturity year		Jan. 31, 2021
Bank Note Program Fixed Interest Rate [Member]
Debt Instrument [Line Items]
Senior notes		$ 650
Fixed interest rate		2.625%
Subsequent Event [Member]
Debt Instrument [Line Items]
Senior notes	$ 750
Debt instrument maturity year	Jul. 31, 2023
Subsequent Event [Member] | Fixed Interest Rate [Member]
Debt Instrument [Line Items]
Senior notes	$ 500
Fixed interest rate	3.55%
London Interbank Offered Rate (LIBOR) [Member] | Bank Note Program Variable Interest Rate [Member]
Debt Instrument [Line Items]
Senior notes		$ 350
London Interbank Offered Rate (LIBOR) [Member] | Subsequent Event [Member] | Variable Interest Rate [Member]
Debt Instrument [Line Items]
Senior notes	$ 250

XML

Shareholders' Equity - Additional Information (Detail) - $ / shares	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, par value	$ 1.00	$ 1.00
Warrant [Member] | Assumed In Acquisition [Member]
Class of Stock [Line Items]
Exercise price of each class of warrants or rights outstanding	$ 517.89
Warrant to purchase common stock	95,580
Warrants, date of expiration	Dec. 12, 2018

XML

Shareholders' Equity - Issued and Outstanding Preferred Stock (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Carrying Value	$ 1,231,500	$ 1,231,500
Series A Fixed Rate Cumulative Perpetual Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Shares Issued	230,000	230,000
Preferred stock, Shares Outstanding	230,000	230,000
Carrying Value	$ 230,000	$ 230,000
Series C Fixed Rate Cumulative Perpetual Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Shares Issued	151,500	151,500
Preferred stock, Shares Outstanding	151,500	151,500
Carrying Value	$ 151,500	$ 151,500
Series E Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Shares Issued	350,000	350,000
Preferred stock, Shares Outstanding	350,000	350,000
Carrying Value	$ 350,000	$ 350,000
Series F Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Shares Issued	50,000	50,000
Preferred stock, Shares Outstanding	50,000	50,000
Carrying Value	$ 500,000	$ 500,000

XML

Shareholders' Equity - Issued and Outstanding Preferred Stock (Parenthetical) (Detail) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Series A Fixed Rate Cumulative Perpetual Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, liquidation preference per share	$ 1,000	$ 1,000
Preferred stock dividend rate	6.375%
Exercise price of each class of warrants or rights outstanding	$ 73.71
Warrants and rights outstanding	202,782
Warrants, date of expiration	Dec. 23, 2018
Series C Fixed Rate Cumulative Perpetual Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, liquidation preference per share	$ 1,000	1,000
Preferred stock dividend rate	6.375%
Series E Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, liquidation preference per share	$ 1,000	$ 1,000
Preferred stock dividend rate	6.45%	6.45%
Date of change in the dividend rate	Feb. 14, 2024	Feb. 14, 2024
London Interbank offered rate plus basis points	3.61%	3.61%
Preferred shares redemption date	Feb. 15, 2024	Feb. 15, 2024
Preferred Stock, Redemption Feature, Redemption Term	90 days	90 days
Series F Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, liquidation preference per share	$ 10,000	$ 10,000
Preferred stock dividend rate	5.125%	5.125%
Date of change in the dividend rate	Oct. 31, 2026	Oct. 31, 2026
London Interbank offered rate plus basis points	3.52%	3.52%
Preferred shares redemption date	Nov. 01, 2026	Nov. 01, 2026
Preferred Stock, Redemption Feature, Redemption Term	90 days	90 days

XML

Pension Plans and Other Postretirement Benefits - Net Periodic Defined Benefit Cost for Defined Benefit Plans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5,069	$ 5,189	$ 10,172	$ 10,097
Interest cost on projected benefit obligation	18,548	19,943	37,353	39,634
Expected return on plan assets	(30,688)	(27,062)	(61,563)	(54,262)
Amortization of prior service cost (credit)	153	154	278	279
Amortization of net actuarial loss (gain)	10,796	7,831	21,896	14,631
Net periodic benefit cost	3,878	6,055	8,136	10,379
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	243	202	469	585
Interest cost on projected benefit obligation	589	778	1,146	1,858
Amortization of prior service cost (credit)	(1,189)	(329)	(2,364)	(679)
Amortization of net actuarial loss (gain)	(213)	(469)	(413)	(494)
Net periodic benefit cost	$ (570)	$ 182	$ (1,162)	$ 1,270

XML

Pension Plans and Other Postretirement Benefits - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Compensation And Retirement Disclosure [Abstract]
Defined contribution pension and retirement savings plans total expense	$ 17,194,000	$ 17,623,000	$ 38,468,000	$ 37,042,000

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Earnings Per Common Share - Computations of Basic Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income available to common shareholders:
Net income	$ 493,160	$ 381,053	$ 845,770	$ 729,980
Less: Preferred stock dividends	(18,130)	(18,237)	(36,260)	(36,474)
Net income available to common equity	475,030	362,816	809,510	693,506
Less: Income attributable to unvested stock-based compensation awards	(2,432)	(2,158)	(4,172)	(4,298)
Net income available to common shareholders	$ 472,598	$ 360,658	$ 805,338	$ 689,208
Weighted-average shares outstanding:
Common shares outstanding (including common stock issuable) and unvested stock-based compensation awards	145,571	153,770	147,510	154,612
Less: Unvested stock-based compensation awards	(746)	(913)	(764)	(974)
Weighted-average shares outstanding	144,825	152,857	146,746	153,638
Basic earnings per common share	$ 3.26	$ 2.36	$ 5.49	$ 4.49

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Earnings Per Common Share - Computations of Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income available to common equity	$ 475,030	$ 362,816	$ 809,510	$ 693,506
Less: Income attributable to unvested stock-based compensation awards	(2,430)	(2,154)	(4,168)	(4,289)
Net income available to common shareholders	$ 472,600	$ 360,662	$ 805,342	$ 689,217
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards	145,571	153,770	147,510	154,612
Less: Unvested stock-based compensation awards	(746)	(913)	(764)	(974)
Plus: Incremental shares from assumed conversion of stock-based compensation awards and warrants to purchase common stock	173	419	195	470
Adjusted weighted-average shares outstanding	144,998	153,276	146,941	154,108
Diluted earnings per common share	$ 3.26	$ 2.35	$ 5.48	$ 4.47

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Earnings Per Common Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share	212,244	412,826	224,844	402,367

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Comprehensive Income - Components of Other Comprehensive Income (Loss) and Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Net Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax			$ (493,290)	$ (485,245)
Cumulative effect of change in accounting principles — equity securities, before tax			(22,795)
Unrealized holding gains (losses), before tax			(187,989)	23,926
Foreign currency translation adjustment, before tax			(1,448)	2,502
Unrealized losses on cash flow hedges, before tax			(21,065)	(441)
Total other comprehensive income (loss) before reclassifications, before tax			(210,502)	25,987
Amortization of unrealized holding losses on held-to-maturity ("HTM") securities, before tax			1,590	1,721
(Gains) losses realized in net income, before tax			(18)	17
Accretion of net gain (losses) on terminated cash flow hedges, before tax			(56)	(78)
Net yield adjustment from cash flow hedges currently in effect, before tax			3,469	(1,094)
Amortization of prior service credit, before tax			(2,086)	(400)
Amortization of actuarial losses, before tax			21,483	14,137
Total other comprehensive income (loss), before tax			(186,120)	40,290
Ending balance, before tax	$ (702,205)	$ (444,955)	(702,205)	(444,955)
Beginning balance, tax			129,476	190,609
Cumulative effect of change in accounting principles — equity securities, tax			5,942
Unrealized holding gains (losses), tax			49,414	(9,404)
Foreign currency translation adjustment, tax			304	(876)
Unrealized losses on cash flow hedges, tax			5,538	174
Total other comprehensive income (loss) before reclassifications, tax			55,256	(10,106)
Amortization of unrealized holding losses on held-to-maturity ('HTM') securities, tax			(418)	(677)
(Gains) losses realized in net income			4	(7)
Accretion of net gain (losses) on terminated cash flow hedges, tax			15	31
Net yield adjustment from cash flow hedges currently in effect, tax			(912)	430
Amortization of prior service credit, tax			549	157
Amortization of actuarial losses, tax			(5,648)	(5,563)
Total other comprehensive income (loss), tax			48,846	(15,735)
Ending balance, tax	184,264	174,874	184,264	174,874
Beginning balance, net of tax			(363,814)	(294,636)
Cumulative effect of change in accounting principles- equity securities			(16,853)
Unrealized holding gains (losses), net of tax			(138,575)	14,522
Foreign currency translation adjustment, net of tax	(2,434)	1,150	(1,144)	1,626
Unrealized losses on cash flow hedges, net of tax			(15,527)	(267)
Total other comprehensive income (loss) before reclassifications, net of tax			(155,246)	15,881
Amortization of unrealized holding losses on held-to-maturity ('HTM') securities, net of tax			1,172	1,044
(Gains) losses realized in net income, net of tax			(14)	10
Accretion of net gain on terminated cash flow hedges, net of tax			(41)	(47)
Net yield adjustment from cash flow hedges currently in effect, net of tax			2,557	(664)
Amortization of prior service credit, net of tax			(1,537)	(243)
Amortization of actuarial losses, net of tax			15,835	8,574
Total other comprehensive income (loss)	(34,698)	21,486	(137,274)	24,555
Ending balance, net of tax	(517,941)	(270,081)	(517,941)	(270,081)
Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax			(59,957)
Cumulative effect of change in accounting principles — equity securities, before tax			(22,795)
Unrealized holding gains (losses), before tax			(187,989)
Total other comprehensive income (loss) before reclassifications, before tax			(187,989)
Amortization of unrealized holding losses on held-to-maturity ("HTM") securities, before tax			1,590
(Gains) losses realized in net income, before tax			(18)
Total other comprehensive income (loss), before tax			(186,417)
Ending balance, before tax	(269,169)		(269,169)
Cumulative effect of change in accounting principles- equity securities			(16,853)
Total other comprehensive income (loss)			(137,417)
Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax			(413,168)	(449,917)
Amortization of prior service credit, before tax			(2,086)	(400)
Amortization of actuarial losses, before tax			21,483	14,137
Total other comprehensive income (loss), before tax			19,397	13,737
Ending balance, before tax	(393,771)	(436,180)	(393,771)	(436,180)
Total other comprehensive income (loss)			14,298
Other [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax			(20,165)	(8,268)
Foreign currency translation adjustment, before tax			(1,448)	2,502
Unrealized losses on cash flow hedges, before tax			(21,065)	(441)
Total other comprehensive income (loss) before reclassifications, before tax			(22,513)	2,061
Accretion of net gain (losses) on terminated cash flow hedges, before tax			(56)	(78)
Net yield adjustment from cash flow hedges currently in effect, before tax			3,469	(1,094)
Total other comprehensive income (loss), before tax			(19,100)	889
Ending balance, before tax	$ (39,265)	(7,379)	$ (39,265)	(7,379)
Investment Securities With OTTI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax				46,725
Unrealized holding gains (losses), before tax				(13,802)
Total other comprehensive income (loss) before reclassifications, before tax				(13,802)
(Gains) losses realized in net income, before tax				(50)
Total other comprehensive income (loss), before tax				(13,852)
Ending balance, before tax		32,873		32,873
Investment Securities All Other [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax				(73,785)
Unrealized holding gains (losses), before tax				37,728
Total other comprehensive income (loss) before reclassifications, before tax				37,728
Amortization of unrealized holding losses on held-to-maturity ("HTM") securities, before tax				1,721
(Gains) losses realized in net income, before tax				67
Total other comprehensive income (loss), before tax				39,516
Ending balance, before tax		$ (34,269)		$ (34,269)

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Comprehensive Income - Accumulated Other Comprehensive Income (Loss), Net (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 16,250,819	$ 16,486,622
Cumulative effect of change in accounting principle — equity securities			(16,853)
Net gain (loss) during period	$ (34,698)	$ 21,486	(137,274)	24,555
Ending balance	15,577,885	16,283,537	15,577,885	16,283,537
Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(44,150)
Cumulative effect of change in accounting principle — equity securities			(16,853)
Net gain (loss) during period			(137,417)
Ending balance	(198,420)		(198,420)
Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(304,546)
Net gain (loss) during period			14,298
Ending balance	(290,248)		(290,248)
Accumulated Other Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(15,118)
Net gain (loss) during period			(14,155)
Ending balance	(29,273)		(29,273)
Accumulated Other Comprehensive Income (Loss), Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(363,814)	(294,636)
Cumulative effect of change in accounting principle — equity securities			(16,853)
Net gain (loss) during period			(137,274)
Ending balance	$ (517,941)	$ (270,081)	$ (517,941)	$ (270,081)

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Derivative Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Derivative [Line Items]
Notional amounts of derivative contracts entered into for trading account purposes	$ 12,400,000,000		$ 12,400,000,000		$ 9,400,000,000
Net unrealized pre-tax gains related to hedged loans held for sale, commitments to originate loans for sale and commitments to sell loans	26,000,000		26,000,000		16,000,000
Aggregate fair value of derivative financial instruments in a liability position	5,000,000		5,000,000		13,000,000
Net liability positions with counterparties	5,000,000		5,000,000		13,000,000
Aggregate fair value of derivative financial instruments in asset position	36,000,000		36,000,000		13,000,000
Net fair value of derivative financial instruments in a net asset position	36,000,000		36,000,000		13,000,000
Collateral relating to net asset positions	37,000,000		37,000,000		12,000,000
Counterparties [Member]
Derivative [Line Items]
Post collateral requirements relating to positions	4,000,000		4,000,000		12,000,000
Clearinghouse Credit Facilities [Member]
Derivative [Line Items]
Amount of initial margin posted	54,000,000		54,000,000		52,000,000
Reduction in the fair value of derivative asset due to contractual settlements			(272,000,000)
Reduction in the fair value of derivative liability due to contractual settlements			(134,000,000)
Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Increase decrease in net interest income due to interest rate swap agreements	(5,000,000)	$ 7,000,000	(4,000,000)	$ 11,000,000
Interest Rate Contracts [Member]
Derivative [Line Items]
Notional amounts of derivative contracts entered into for trading account purposes	40,300,000,000		40,300,000,000		29,900,000,000
Foreign Currency and Other Option and Futures Contracts [Member]
Derivative [Line Items]
Notional amounts of derivative contracts entered into for trading account purposes	647,000,000		647,000,000		$ 530,000,000
Credit Risk Derivative [Member]
Derivative [Line Items]
Fair value of additional collateral to be posted for derivative financial instruments	$ 0		$ 0

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Derivative Financial Instruments - Information about Interest Rate Swap Agreements (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional Amount	$ 12,400,000,000	$ 9,400,000,000
Average Maturity (in years)	1 year 10 months 24 days	2 years 6 months
Estimated Fair Value Gain (Loss)	$ (129,000)	$ 639,000
Interest Payments On Variable Rate Commercial Real Estate Loans [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Notional Amount	$ 7,700,000,000	$ 4,850,000,000
Average Maturity (in years)	1 year 4 months 24 days	2 years
Weighted-Average Rate, Fixed	1.52%	1.52%
Weighted-Average Rate, Variable	1.98%	1.36%
Estimated Fair Value Gain (Loss)	$ 56,000	$ 66,000
Fixed Rate Long-Term Borrowings [Member] | Fair Value Hedges [Member]
Derivative [Line Items]
Notional Amount	$ 4,700,000,000	$ 4,550,000,000
Average Maturity (in years)	2 years 8 months 12 days	2 years 10 months 25 days
Weighted-Average Rate, Fixed	2.41%	2.27%
Weighted-Average Rate, Variable	2.72%	2.09%
Estimated Fair Value Gain (Loss)	$ (185,000)	$ 573,000

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Derivative Financial Instruments - Information about Interest Rate Swap Agreements (Parenthetical) (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional Amount	$ 12,400,000,000	$ 9,400,000,000
Forward-Starting Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Notional Amount	4,850,000,000	2,000,000,000
Fair Value Hedges [Member]
Derivative [Line Items]
Reduction of estimated fair value losses on hedging instruments	96,100,000	41,100,000
Cash Flow Hedges [Member]
Derivative [Line Items]
Reduction of estimated fair value losses on hedging instruments	$ 33,900,000	$ 16,300,000

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Derivative Financial Instruments - Information about Fair Values of Derivative Instruments in Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 101,474	$ 92,517
Liability Derivatives, Fair Value	290,021	139,186
Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	97,205	91,144
Liability Derivatives, Fair Value	284,799	138,903
Fair Value Hedges [Member] | Derivatives Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	4,269	1,373
Liability Derivatives, Fair Value	5,222	283
Interest Rate Swap Agreements [Member] | Fair Value Hedges [Member] | Derivatives Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	397	639
Liability Derivatives, Fair Value	526
Commitments to Sell Real Estate Loans [Member] | Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	3,917	2,526
Liability Derivatives, Fair Value	2,211	1,019
Commitments to Sell Real Estate Loans [Member] | Fair Value Hedges [Member] | Derivatives Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	3,872	734
Liability Derivatives, Fair Value	4,696	283
Mortgage-Related Commitments to Originate Real Estate Loans for Sale [Member] | Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	11,801	8,797
Liability Derivatives, Fair Value	1,050	494
Interest Rate Contracts [Member] | Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	72,973	74,164
Liability Derivatives, Fair Value	274,959	132,104
Foreign Exchange and Other Option and Futures Contracts [Member] | Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	8,514	5,657
Liability Derivatives, Fair Value	$ 6,579	$ 5,286

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Derivative Financial Instruments - Information about Fair Values of Derivative Instruments in Consolidated Balance Sheet (Parenthetical) (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Offsetting [Abstract]
Reduction in estimated fair value of interest rate contracts in asset position	$ 272.2	$ 136.2
Reduction in estimated fair value of interest rate contracts in liability position	$ 4.0	$ 12.2

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Derivative Financial Instruments - Information about Fair Values of Derivative Instruments in Consolidated Statement of Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging instruments, Derivatives	$ (321)	$ 2,399	$ 705	$ 6,185
Interest Rate Swap Agreements [Member] | Fixed Rate Long-Term Borrowings [Member] | Derivatives Designated and Qualifying as Hedging Instruments [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives in fair value hedging relationships, Derivatives	(13,357)	(5,795)	(55,747)	(9,914)
Derivatives in fair value hedging relationships, Hedged item	13,884	5,011	56,254	9,023
Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging instruments, Derivatives	(2,686)	831	(4,291)	2,781
Foreign Exchange and Other Option and Futures Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging instruments, Derivatives	$ 2,365	$ 1,568	$ 4,996	$ 3,404

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Derivative Financial Instruments - Information about Hedged Items Included in Consolidated Balance Sheet (Detail) - Long-term Debt [Member] - Derivatives Designated and Qualifying as Hedging Instruments [Member] - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Carrying Amount [Member]
Derivatives, Fair Value [Line Items]
Hedged Item	$ 4,598,712	$ 4,504,029
Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount [Member]
Derivatives, Fair Value [Line Items]
Hedged Item	$ (96,387)	$ (40,133)

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Variable Interest Entities and Asset Securitizations - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Variable Interest Entity Disclosure [Abstract]
Other assets for its "investment" in the common securities recognized by the company of various trusts	$ 23,000,000		$ 23,000,000		$ 23,000,000
Total assets of partnerships in which the company invested	1,000,000,000		1,000,000,000		1,000,000,000
Maximum exposure to loss of investments in real estate partnerships	461,000,000		461,000,000		420,000,000
Unfunded commitments included in company's maximum exposure to loss of investments in real estate partnerships	229,000,000		229,000,000		$ 201,000,000
Investments amortized to income tax expense	13,000,000	$ 11,000,000	26,000,000	$ 24,000,000
Federal tax credits and other federal tax benefits recognized	$ 16,000,000	$ 15,000,000	$ 32,000,000	$ 31,000,000

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Fair Value Measurements - Assets and Liabilities Measured at Estimated Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading account assets	$ 148,303	$ 132,909
Investment securities	9,658,846	10,896,284
U.S. Treasury and Federal Agencies [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	1,707,821	1,947,487
Obligations of States and Political Subdivisions [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	1,925	2,589
Government Issued or Guaranteed [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	7,817,299	8,716,392
Other Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	131,777	128,832
Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities		100,956
Fair Value Measurements, Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading account assets	148,303	132,909
Investment securities	9,658,846	10,896,284
Real estate loans held for sale	1,151,090	378,047
Other assets	19,987	12,696
Total assets	11,064,708	11,419,936
Trading account liabilities	281,538	137,390
Other liabilities	8,483	1,796
Total liabilities	290,021	139,186
Fair Value Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading account assets	46,502	47,873
Investment securities		73,232
Total assets	112,250	121,105
Fair Value Measurements, Recurring [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading account assets	101,801	85,036
Investment securities	9,658,822	10,823,024
Real estate loans held for sale	1,151,090	378,047
Other assets	8,186	3,899
Total assets	10,940,633	11,290,006
Trading account liabilities	281,538	137,390
Other liabilities	7,433	1,302
Total liabilities	288,971	138,692
Fair Value Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	24	28
Other assets	11,801	8,797
Total assets	11,825	8,825
Other liabilities	1,050	494
Total liabilities	1,050	494
Fair Value Measurements, Recurring [Member] | U.S. Treasury and Federal Agencies [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	1,707,821	1,947,487
Fair Value Measurements, Recurring [Member] | U.S. Treasury and Federal Agencies [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	1,707,821	1,947,487
Fair Value Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	1,925	2,589
Fair Value Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	1,925	2,589
Fair Value Measurements, Recurring [Member] | Government Issued or Guaranteed [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	7,817,299	8,716,392
Fair Value Measurements, Recurring [Member] | Government Issued or Guaranteed [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	7,817,299	8,716,392
Fair Value Measurements, Recurring [Member] | Privately Issued Mortgage-Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	24	28
Fair Value Measurements, Recurring [Member] | Privately Issued Mortgage-Backed Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	24	28
Fair Value Measurements, Recurring [Member] | Other Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	131,777	128,832
Fair Value Measurements, Recurring [Member] | Other Debt Securities [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	131,777	128,832
Fair Value Measurements, Recurring [Member] | Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	86,482	100,956
Fair Value Measurements, Recurring [Member] | Equity Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	65,748	73,232
Fair Value Measurements, Recurring [Member] | Equity Securities [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities	$ 20,734	$ 27,724

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Fair Value Measurements - Changes in Level 3 Assets and Liabilities Measured at Estimated Fair Value on Recurring Basis (Detail) - Fair Value Measurements, Recurring [Member] - Significant Unobservable Inputs (Level 3) [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Privately Issued Mortgage-Backed Securities [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 27	$ 41	$ 28	$ 44
Total gains (losses) realized/unrealized:
Settlements	(3)	(6)	(4)	(9)
Ending Balance	24	35	24	35
Other Assets and Other Liabilities [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	8,760	16,202	8,303	7,325
Total gains (losses) realized/unrealized:
Included in earnings	20,277	19,571	28,407	43,511
Transfers out of Level 3	(18,286)	(23,348)	(25,959)	(38,411)
Ending Balance	10,751	12,425	10,751	12,425
Changes in unrealized gains included in earnings related to assets still held at end of period	$ 10,686	$ 10,892	$ 10,686	$ 12,372

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Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Measurement Input [Extensible List]	us-gaap:MeasurementInputComparabilityAdjustmentMember		us-gaap:MeasurementInputComparabilityAdjustmentMember
Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rates for fair value estimations			15.00%
Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rates for fair value estimations			90.00%
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Change in fair value of nonrecurring fair value measured loans for charge-offs and impairment reserves	$ 21	$ 21	$ 45	$ 43
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loans measured at fair value on nonrecurring basis	206	200	206	200	$ 210
Assets taken in foreclosure of defaulted loans measured at fair value on a nonrecurring basis	30	37	30	37
Fair Value, Measurements, Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loans measured at fair value on nonrecurring basis	119	118	119	118	145
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loans measured at fair value on nonrecurring basis	$ 87	$ 82	$ 87	$ 82	$ 65

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Fair Value Measurements - Quantitative Information Related to Significant Unobservable Inputs (Detail) - Fair Value Measurements, Recurring [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Privately Issued Mortgage-Backed Securities [Member] | Two Independent Pricing Quotes [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Recurring fair value measurements for certain Level 3 Assets and Liabilities	$ 24	$ 28
Other Assets and Other Liabilities [Member] | Discounted Cash Flows [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Recurring fair value measurements for certain Level 3 Assets and Liabilities	$ 10,751	$ 8,303
Other Assets and Other Liabilities [Member] | Discounted Cash Flows [Member] | Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Commitment expirations	0.00%	0.00%
Other Assets and Other Liabilities [Member] | Discounted Cash Flows [Member] | Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Commitment expirations	90.00%	78.00%
Other Assets and Other Liabilities [Member] | Discounted Cash Flows [Member] | Weighted Average [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Commitment expirations	20.00%	22.00%

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Fair Value Measurements - Carrying Amounts and Estimated Fair Value for Financial Instrument Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Financial assets:
Interest-bearing deposits at banks	$ 6,669,985		$ 5,078,903
Trading account assets	148,303		132,909
Investment securities	13,283,002		14,664,525
Loans and leases:
Allowance for credit losses	(1,019,248)	$ (1,019,671)	(1,017,198)	$ (1,008,225)	$ (1,001,430)	$ (988,997)
Loans and leases, net	86,778,202		86,971,785
Financial liabilities:
Noninterest-bearing deposits	(32,086,191)		(33,975,180)
Savings and interest-checking deposits	(51,107,290)		(51,698,008)
Time deposits	(5,817,680)		(6,580,962)
Deposits at Cayman Islands office	(261,427)		(177,996)
Long-term borrowings	(8,382,316)		(8,141,430)
Estimate Fair Value [Member]
Financial assets:
Cash and cash equivalents	1,369,094		1,420,888
Interest-bearing deposits at banks	6,669,985		5,078,903
Trading account assets	148,303		132,909
Investment securities	13,204,236		14,653,074
Loans and leases:
Commercial loans and leases	21,465,594		21,321,282
Commercial real estate loans	33,579,305		32,950,724
Residential real estate loans	18,110,823		19,596,826
Consumer loans	13,257,759		13,161,517
Loans and leases, net	86,413,481		87,030,349
Accrued interest receivable	333,549		327,170
Financial liabilities:
Noninterest-bearing deposits	(32,086,191)		(33,975,180)
Savings and interest-checking deposits	(51,107,290)		(51,698,008)
Time deposits	(5,865,067)		(6,635,048)
Deposits at Cayman Islands office	(261,427)		(177,996)
Short-term borrowings	(3,239,416)		(175,099)
Long-term borrowings	(8,392,684)		(8,193,783)
Accrued interest payable	(87,779)		(75,641)
Trading account liabilities	(281,538)		(137,390)
Other financial instruments:
Commitments to originate real estate loans for sale	10,751		8,303
Commitments to sell real estate loans	882		1,958
Other credit-related commitments	(127,898)		(125,281)
Interest rate swap agreements used for interest rate risk management	(129)		639
Estimate Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets:
Cash and cash equivalents	1,258,614		1,352,035
Trading account assets	46,502		47,873
Investment securities	65,748		73,232
Estimate Fair Value [Member] | Significant Observable Inputs (Level 2) [Member]
Financial assets:
Cash and cash equivalents	110,480		68,853
Interest-bearing deposits at banks	6,669,985		5,078,903
Trading account assets	101,801		85,036
Investment securities	13,027,717		14,469,127
Loans and leases:
Commercial real estate loans	868,392		22,130
Residential real estate loans	4,128,794		4,440,645
Loans and leases, net	4,997,186		4,462,775
Accrued interest receivable	333,549		327,170
Financial liabilities:
Noninterest-bearing deposits	(32,086,191)		(33,975,180)
Savings and interest-checking deposits	(51,107,290)		(51,698,008)
Time deposits	(5,865,067)		(6,635,048)
Deposits at Cayman Islands office	(261,427)		(177,996)
Short-term borrowings	(3,239,416)		(175,099)
Long-term borrowings	(8,392,684)		(8,193,783)
Accrued interest payable	(87,779)		(75,641)
Trading account liabilities	(281,538)		(137,390)
Other financial instruments:
Commitments to sell real estate loans	882		1,958
Interest rate swap agreements used for interest rate risk management	(129)		639
Estimate Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets:
Investment securities	110,771		110,715
Loans and leases:
Commercial loans and leases	21,465,594		21,321,282
Commercial real estate loans	32,710,913		32,928,594
Residential real estate loans	13,982,029		15,156,181
Consumer loans	13,257,759		13,161,517
Loans and leases, net	81,416,295		82,567,574
Other financial instruments:
Commitments to originate real estate loans for sale	10,751		8,303
Other credit-related commitments	(127,898)		(125,281)
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	1,369,094		1,420,888
Interest-bearing deposits at banks	6,669,985		5,078,903
Trading account assets	148,303		132,909
Investment securities	13,283,002		14,664,525
Loans and leases:
Commercial loans and leases	21,894,857		21,742,651
Commercial real estate loans	34,137,937		33,366,373
Residential real estate loans	18,310,712		19,613,344
Consumer loans	13,453,944		13,266,615
Allowance for credit losses	(1,019,248)		(1,017,198)
Loans and leases, net	86,778,202		86,971,785
Accrued interest receivable	333,549		327,170
Financial liabilities:
Noninterest-bearing deposits	(32,086,191)		(33,975,180)
Savings and interest-checking deposits	(51,107,290)		(51,698,008)
Time deposits	(5,817,680)		(6,580,962)
Deposits at Cayman Islands office	(261,427)		(177,996)
Short-term borrowings	(3,239,416)		(175,099)
Long-term borrowings	(8,382,316)		(8,141,430)
Accrued interest payable	(87,779)		(75,641)
Trading account liabilities	(281,538)		(137,390)
Other financial instruments:
Commitments to originate real estate loans for sale	10,751		8,303
Commitments to sell real estate loans	882		1,958
Other credit-related commitments	(127,898)		(125,281)
Interest rate swap agreements used for interest rate risk management	$ (129)		$ 639

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Commitments and Contingencies - Company's Significant Commitments (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Commitments to extend credit
Home equity lines of credit	$ 5,474,798	$ 5,482,622
Commercial real estate loans to be sold	323,750	194,763
Other commercial real estate	5,855,075	6,050,569
Residential real estate loans to be sold	361,034	347,113
Other residential real estate	240,020	201,426
Commercial and other	13,247,615	12,733,815
Standby letters of credit	2,410,569	2,497,844
Commercial letters of credit	55,655	46,739
Financial guarantees and indemnification contracts	3,458,625	3,434,381
Commitments to sell real estate loans	$ 1,725,093	$ 812,217

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Commitments and Contingencies - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Maximum credit risk for recourse associated with loans sold under Federal National Mortgage Association Delegated Underwriting and Servicing program		$ 3,300,000,000	$ 3,300,000,000
Increase in litigation reserve	$ 135,000,000
Minimum [Member]
Loss Contingencies [Line Items]
Range of reasonably possible losses		0
Maximum [Member]
Loss Contingencies [Line Items]
Range of reasonably possible losses		$ 50,000,000

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Segment Information - Information about Company's Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net Income (Loss)	$ 493,160	$ 381,053	$ 845,770	$ 729,980
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	1,466,201	1,399,016	2,900,414	2,760,121
Business Banking [Member]
Segment Reporting Information [Line Items]
Net Income (Loss)	43,007	28,750	80,725	53,738
Business Banking [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	136,029	124,982	263,913	245,315
Business Banking [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	912	1,006	1,830	1,917
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net Income (Loss)	126,391	105,627	251,856	218,414
Commercial Banking [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	269,499	277,116	535,895	551,024
Commercial Banking [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	928	843	1,778	1,763
Commercial Real Estate [Member]
Segment Reporting Information [Line Items]
Net Income (Loss)	112,691	87,271	220,994	171,818
Commercial Real Estate [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	205,541	197,298	408,148	392,423
Commercial Real Estate [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	385	357	725	764
Discretionary Portfolio [Member]
Segment Reporting Information [Line Items]
Net Income (Loss)	29,113	29,740	48,852	63,685
Discretionary Portfolio [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	58,976	72,044	109,014	150,990
Discretionary Portfolio [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	(10,554)	(12,397)	(21,386)	(25,324)
Residential Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Net Income (Loss)	15,402	13,742	30,348	23,660
Residential Mortgage Banking [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	82,167	88,700	164,625	174,102
Residential Mortgage Banking [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	16,047	18,144	31,468	36,355
Retail Banking [Member]
Segment Reporting Information [Line Items]
Net Income (Loss)	143,089	100,094	266,469	186,285
Retail Banking [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	420,540	383,904	814,016	752,422
Retail Banking [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	2,707	3,045	5,572	6,092
All Other [Member]
Segment Reporting Information [Line Items]
Net Income (Loss)	23,467	15,829	(53,474)	12,380
All Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	293,449	254,972	604,803	493,845
All Other [Member] | Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Total Revenues	$ (10,425)	$ (10,998)	$ (19,987)	$ (21,567)

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Segment Information - Summary of Segment Information (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Segment Reporting Information [Line Items]
Average Total Assets	$ 117,021	$ 120,860	$ 121,865
Business Banking [Member]
Segment Reporting Information [Line Items]
Average Total Assets	5,656	5,602	5,595
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Average Total Assets	26,542	26,573	26,802
Commercial Real Estate [Member]
Segment Reporting Information [Line Items]
Average Total Assets	22,848	22,741	22,875
Discretionary Portfolio [Member]
Segment Reporting Information [Line Items]
Average Total Assets	33,277	37,203	38,341
Residential Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Average Total Assets	2,186	2,355	2,341
Retail Banking [Member]
Segment Reporting Information [Line Items]
Average Total Assets	13,403	12,702	12,337
All Other [Member]
Segment Reporting Information [Line Items]
Average Total Assets	$ 13,109	$ 13,684	$ 13,574

XML

Segment Information - Summary of Segment Information (Parenthetical) (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting [Abstract]
Taxable-equivalent adjustment	$ 5,397,000	$ 8,736,000	$ 10,206,000	$ 16,735,000

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Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P. - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Loan facility carrying amount	$ 8,382,316		$ 8,382,316		$ 8,141,430
Bayview Lending Group [Member]
Schedule of Equity Method Investments [Line Items]
Minority interest in Bayview Lending Group LLC	20.00%		20.00%
Carrying value of minority interest investment in Bayview Lending Group LLC	$ 0		$ 0
Bayview Lending Group [Member] | Other Revenues From Operations [Member]
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments			23,000
Bayview Lending Group and Bayview Financial [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding principal balances of mortgage servicing rights	2,800,000		2,800,000		3,000,000
Bayview Lending Group and Bayview Financial [Member] | Bank Servicing [Member]
Schedule of Equity Method Investments [Line Items]
Revenue from contract with customer	4,000	$ 4,000	7,000	$ 9,000
Bayview Financial [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding principal balances of residential mortgage loans from Bayview Financial	53,500,000		53,500,000		56,600,000
Revenues from sub-servicing	28,000	$ 25,000	58,000	$ 48,000
Investment securities in held-to-maturity portfolio securitized by Bayview Financial	123,000		123,000		$ 136,000
Bayview Financial [Member] | Syndicated Loan Facility [Member]
Schedule of Equity Method Investments [Line Items]
Loan facility carrying amount	750,000		750,000
Bayview Financial [Member] | Syndicated Loan Facility [Member] | M&T Bank [Member]
Schedule of Equity Method Investments [Line Items]
Loan facility carrying amount	$ 90,000		$ 90,000

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Revenue from Contracts with Customers - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation Of Revenue [Line Items]
Uncollected amounts receivable	$ 53		$ 53
Accrued interest and other liabilities [Member]
Disaggregation Of Revenue [Line Items]
Deferred revenue	$ 46		$ 46
Maximum [Member]
Disaggregation Of Revenue [Line Items]
Period of satisfaction of contract with customer	1 year		1 year
ASU 2014-09 [Member]
Disaggregation Of Revenue [Line Items]
Expense recognized on credit card rewards in other costs of operations	$ 3	$ 3	$ 6	$ 5

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Revenue from Contracts with Customers - Summary of Sources of M&T's Noninterest Income that are Subject to the Amended Guidance (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation Of Revenue [Line Items]
Brokerage services income	$ 12,629	$ 16,617	$ 26,021	$ 34,001
Other revenues from operations:
Total other income	457,414	460,816	916,110	907,661
Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	106,784	106,057	211,899	210,233
Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	137,641	$ 126,797	269,016	$ 246,812
ASU 2014-09 [Member]
Disaggregation Of Revenue [Line Items]
Brokerage services income	12,629		26,021
Other revenues from operations:
Merchant discount and credit card fees	26,062		50,834
Other	24,412		47,302
Total other income	307,528		605,072
ASU 2014-09 [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	106,784		211,899
ASU 2014-09 [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	137,641		269,016
ASU 2014-09 [Member] | Business Banking [Member]
Other revenues from operations:
Merchant discount and credit card fees	8,334		15,837
Total other income	23,945		46,852
ASU 2014-09 [Member] | Business Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	15,611		31,015
ASU 2014-09 [Member] | Commercial Banking [Member]
Other revenues from operations:
Merchant discount and credit card fees	12,542		25,254
Other	3,646		5,209
Total other income	40,458		79,387
ASU 2014-09 [Member] | Commercial Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	24,270		48,924
ASU 2014-09 [Member] | Commercial Real Estate [Member]
Other revenues from operations:
Merchant discount and credit card fees	428		982
Other	2,215		3,074
Total other income	5,094		9,271
ASU 2014-09 [Member] | Commercial Real Estate [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	2,451		5,215
ASU 2014-09 [Member] | Discretionary Portfolio [Member]
Other revenues from operations:
Other	413		865
Total other income	413		865
ASU 2014-09 [Member] | Residential Mortgage Banking [Member]
Other revenues from operations:
Other	927		1,970
Total other income	930		1,976
ASU 2014-09 [Member] | Residential Mortgage Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	3		6
ASU 2014-09 [Member] | Retail Banking [Member]
Other revenues from operations:
Merchant discount and credit card fees	4,140		7,528
Other	9,613		19,478
Total other income	76,768		150,622
ASU 2014-09 [Member] | Retail Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	63,015		123,616
ASU 2014-09 [Member] | All Other [Member]
Disaggregation Of Revenue [Line Items]
Brokerage services income	12,629		26,021
Other revenues from operations:
Merchant discount and credit card fees	618		1,233
Other	7,598		16,706
Total other income	159,920		316,099
ASU 2014-09 [Member] | All Other [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	1,434		3,123
ASU 2014-09 [Member] | All Other [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	$ 137,641		$ 269,016

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Recent Accounting Developments - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income to retained earnings	$ 17
ASU 2016-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Minimum lease payments under non cancelable operating lease		$ 429
Lessee, operating lease term		12 months