Huntington Bancshares Incorporated Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale and Other Securities (Trust Preferred) (Details 3)

Available-for-Sale and Other Securities (Trust Preferred) (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Trust Preferred Securities Data [Line Items]
Total investment securities, Unrealized Gross Losses	$ (77,218)	$ (92,770)
Pooled Trust Preferred [Member]
Trust Preferred Securities Data [Line Items]
Par Value	193,561	193,597
Amortized Cost	138,098	139,194
Fair Value	89,155	82,738
Total investment securities, Unrealized Gross Losses	(48,943)	(56,456)
Pooled Trust Preferred [Member] \| Alesco II [Member]
Trust Preferred Securities Data [Line Items]
Par Value	41,646
Amortized Cost	28,636
Fair Value	18,383
Total investment securities, Unrealized Gross Losses	(10,253)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	8.00%
Expected Defaults as Percent of Remaining Performing Collateral	7.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| ICONS [Member]
Trust Preferred Securities Data [Line Items]
Par Value	19,801
Amortized Cost	19,801
Fair Value	15,767
Total investment securities, Unrealized Gross Losses	(4,034)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	7.00%
Expected Defaults as Percent of Remaining Performing Collateral	16.00%
Excess Subordination	56.00%
Pooled Trust Preferred [Member] \| I-Pre TSL II [Member]
Trust Preferred Securities Data [Line Items]
Par Value	0
Amortized Cost	0
Fair Value	0
Total investment securities, Unrealized Gross Losses	0
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	0.00%
Expected Defaults as Percent of Remaining Performing Collateral	0.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| MM Comm III [Member]
Trust Preferred Securities Data [Line Items]
Par Value	5,584
Amortized Cost	5,335
Fair Value	4,369
Total investment securities, Unrealized Gross Losses	(966)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	5.00%
Expected Defaults as Percent of Remaining Performing Collateral	9.00%
Excess Subordination	28.00%
Pooled Trust Preferred [Member] \| Pre TSL IX [Member]
Trust Preferred Securities Data [Line Items]
Par Value	5,000
Amortized Cost	3,955
Fair Value	2,662
Total investment securities, Unrealized Gross Losses	(1,293)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	19.00%
Expected Defaults as Percent of Remaining Performing Collateral	9.00%
Excess Subordination	4.00%
Pooled Trust Preferred [Member] \| Pre TSL XI [Member]
Trust Preferred Securities Data [Line Items]
Par Value	25,000
Amortized Cost	20,517
Fair Value	13,595
Total investment securities, Unrealized Gross Losses	(6,922)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	16.00%
Expected Defaults as Percent of Remaining Performing Collateral	9.00%
Excess Subordination	9.00%
Pooled Trust Preferred [Member] \| Pre TSL XIII [Member]
Trust Preferred Securities Data [Line Items]
Par Value	27,530
Amortized Cost	20,127
Fair Value	13,952
Total investment securities, Unrealized Gross Losses	(6,175)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	21.00%
Expected Defaults as Percent of Remaining Performing Collateral	21.00%
Excess Subordination	6.00%
Pooled Trust Preferred [Member] \| Reg Diversified [Member]
Trust Preferred Securities Data [Line Items]
Par Value	25,500
Amortized Cost	6,287
Fair Value	1,591
Total investment securities, Unrealized Gross Losses	(4,696)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	34.00%
Expected Defaults as Percent of Remaining Performing Collateral	7.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Soloso [Member]
Trust Preferred Securities Data [Line Items]
Par Value	12,500
Amortized Cost	2,440
Fair Value	468
Total investment securities, Unrealized Gross Losses	(1,972)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	29.00%
Expected Defaults as Percent of Remaining Performing Collateral	19.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Tropic III [Member]
Trust Preferred Securities Data [Line Items]
Par Value	31,000
Amortized Cost	31,000
Fair Value	18,368
Total investment securities, Unrealized Gross Losses	$ (12,632)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	19.00%
Expected Defaults as Percent of Remaining Performing Collateral	8.00%
Excess Subordination	39.00%