Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income
Interest and fees on loans	$ 182,625	$ 248,579	$ 599,306	$ 768,216
Interest and dividends on investment securities
Taxable	13,689	23,485	50,064	79,248
Tax-exempt	14,523	14,491	44,021	42,950
Other interest	2,238	4,865	7,774	13,086
Total interest income	213,075	291,420	701,165	903,500
Interest expense
Interest on deposits	10,033	61,585	59,877	191,408
Interest on federal funds purchased and securities sold under agreements to repurchase	34	145	454	1,058
Interest on other short-term funding	5	30	46	113
Interest on PPPLF funding	899	0	1,574	0
Interest on FHLB advances	14,375	15,896	47,471	53,194
Interest on long-term funding	5,580	7,398	16,780	22,196
Total interest expense	30,925	85,054	126,201	267,969
Net interest income	182,150	206,365	574,964	635,532
Provision for credit losses	43,009	2,000	157,009	16,000
Net interest income after provision for credit losses	139,141	204,365	417,954	619,532
Noninterest income
Noninterest Income In Scope of Topic 606	49,243	72,414	187,521	217,853
Capital markets, net	7,222	4,300	22,067	12,215
Mortgage banking, net	12,636	10,940	31,043	25,118
Bank and corporate owned life insurance	3,074	4,337	9,793	11,482
Asset gains (losses), net(b)	(339)	877	156,945	2,316
Investment securities gains (losses), net	7	3,788	9,222	5,931
Other	2,232	2,537	7,321	8,344
Total noninterest income	75,545	100,850	428,342	287,890
Noninterest expense
Personnel	108,567	123,170	334,117	366,449
Technology	19,666	20,572	61,639	59,698
Occupancy	17,854	15,164	48,386	45,466
Business development and advertising	3,626	7,991	13,007	21,284
Equipment	5,399	6,335	16,150	17,580
Legal and professional	5,591	5,724	15,809	14,342
Loan and foreclosure costs	2,118	1,638	8,842	5,599
FDIC assessment	3,900	4,000	14,650	12,250
Other intangible amortization	2,253	2,686	7,939	7,237
Loss on prepayments of FHLB advances	44,650	0	44,650	0
Other	13,745	12,021	35,537	34,479
Total noninterest expense	227,587	200,930	603,184	590,380
Income (loss) before income taxes	(12,900)	104,286	243,112	317,042
Income tax expense (benefit)	(58,114)	20,947	3,342	62,356
Net income	45,214	83,339	239,769	254,686
Preferred stock dividends	5,207	3,801	13,152	11,402
Net income available to common equity	$ 40,007	$ 79,539	$ 226,618	$ 243,285
Earnings per common share
Basic	$ 0.26	$ 0.50	$ 1.47	$ 1.49
Diluted	$ 0.26	$ 0.49	$ 1.46	$ 1.48
Average common shares outstanding
Basic	152,440	159,126	153,175	161,727
Diluted	153,194	160,382	153,914	163,061
Series C Preferred Stock
Average common shares outstanding
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.3828125	$ 0.3828125
Series D Preferred Stock
Average common shares outstanding
Preferred Stock, Dividends, Per Share, Cash Paid	0.3359375	0.3359375
Series E Preferred Stock
Average common shares outstanding
Preferred Stock, Dividends, Per Share, Cash Paid	0.3671875	$ 0.3671875
Series F Preferred Stock
Average common shares outstanding
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.3515625
Huntington National Bank
Noninterest income
Related acquisition asset losses net of asset gains		less than $1 million		less than $1 million
Wealth management fees(a)
Noninterest income
Noninterest Income In Scope of Topic 606	$ 21,152	$ 21,015	$ 62,884	$ 61,885
Service charges and deposit account fees
Noninterest income
Noninterest Income In Scope of Topic 606	14,283	16,561	40,989	47,102
Card-based fees
Noninterest income
Noninterest Income In Scope of Topic 606	10,207	10,501	28,735	29,973
Service charges and account fees	10,195	10,456	28,685	29,848
Other fee-based revenue
Noninterest income
Noninterest Income In Scope of Topic 606	3,487	3,383	9,763	9,490
Service charges and account fees	4,968	5,085	14,240	14,246
Insurance commissions and fess
Noninterest income
Noninterest Income In Scope of Topic 606	114	20,954	45,153	69,403
Risk Management and Shared Services
Noninterest expense
Loss on prepayments of FHLB advances			45,000
Risk Management and Shared Services | ABRC
Noninterest income
Asset gains (losses), net(b)			163,000
Operating Segments | Risk Management and Shared Services
Interest expense
Net interest income	16,472	21,528	54,662	65,834
Provision for credit losses	21,679	(14,879)	99,257	(35,359)
Noninterest income
Total noninterest income	5,182	7,245	176,646	15,472
Noninterest expense
Acquisition related costs(c)	218	1,629	2,457	5,995
Total noninterest expense	73,343	24,743	108,122	70,198
Income (loss) before income taxes	(89,535)	5,512	(21,407)	18,400
Income tax expense (benefit)	(72,389)	2,080	(47,135)	3,546
Net income	$ (17,146)	$ 3,432	$ 25,728	$ 14,854