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	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Trust Preferred Securities Data [Line Items]
Total investment securities, Unrealized Gross Losses	$ (78,234)	$ (92,770)
Pooled Trust Preferred [Member]
Trust Preferred Securities Data [Line Items]
Par Value	193,150	193,597
Amortized Cost	136,664	139,194
Fair Value	102,070	82,738
Total investment securities, Unrealized Gross Losses	(34,594)	$ (56,456)
Pooled Trust Preferred [Member] \| Alesco II [Member]
Trust Preferred Securities Data [Line Items]
Par Value	41,646
Amortized Cost	28,434
Fair Value	25,212
Total investment securities, Unrealized Gross Losses	$ (3,222)
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	7.00%
Excess Subordination	3.00%
Pooled Trust Preferred [Member] \| ICONS [Member]
Trust Preferred Securities Data [Line Items]
Par Value	$ 19,515
Amortized Cost	19,515
Fair Value	15,590
Total investment securities, Unrealized Gross Losses	$ (3,925)
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	$ 5,459
Amortized Cost	5,216
Fair Value	4,355
Total investment securities, Unrealized Gross Losses	$ (861)
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	6.00%
Excess Subordination	33.00%
Pooled Trust Preferred [Member] \| Pre TSL IX [Member]
Trust Preferred Securities Data [Line Items]
Par Value	$ 5,000
Amortized Cost	3,955
Fair Value	3,177
Total investment securities, Unrealized Gross Losses	$ (778)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	17.00%
Expected Defaults as Percent of Remaining Performing Collateral	9.00%
Excess Subordination	8.00%
Pooled Trust Preferred [Member] \| Pre TSL XI [Member]
Trust Preferred Securities Data [Line Items]
Par Value	$ 25,000
Amortized Cost	20,399
Fair Value	15,380
Total investment securities, Unrealized Gross Losses	$ (5,019)
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	19,999
Fair Value	16,735
Total investment securities, Unrealized Gross Losses	$ (3,264)
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	22.00%
Excess Subordination	11.00%
Pooled Trust Preferred [Member] \| Reg Diversified [Member]
Trust Preferred Securities Data [Line Items]
Par Value	$ 25,500
Amortized Cost	5,706
Fair Value	2,468
Total investment securities, Unrealized Gross Losses	$ (3,238)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	32.00%
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	618
Total investment securities, Unrealized Gross Losses	$ (1,822)
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	18,535
Total investment securities, Unrealized Gross Losses	$ (12,465)
Number of Issuers Currently Performing	0
Number of Issuers Currently Remaining	0
Actual Deferrals and Defaults as Percent of Original Collateral	20.00%
Expected Defaults as Percent of Remaining Performing Collateral	8.00%
Excess Subordination	39.00%