Par value of securities

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- Definition

Available-for-sale Securities Actual Deferrals and Defaults as Percent of Original Collateral

+ Details

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- Definition

Available-for-sale Securities, Excess Subordination

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Available-for-sale securities, Expected Defaults as Percent of Remaining Performing Collateral

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Lowest credit rating assigned by external agency

+ Details

Name:	hban_AvailableForSaleSecuritiesLowestCreditRating
Namespace Prefix:	hban
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	instant

- Definition

Available for Sale Securities, Number of Issuers Currently Performing

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Issuers Currently Remaining

+ Details

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Balance Type:	na
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- Details

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- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ Details

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- Definition

For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 12

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 15D

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 22

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 15C

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 13

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 320

-Section 50

-Paragraph 2

-Subparagraph (b)-(g)

-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 137

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6379932&loc=d3e22054-111558

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ Details

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Available-for-Sale and Other Securities (Details 4) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Trust Preferred Securities Data [Line Items]
Amortized Cost	$ 378,354	$ 435,835
Fair Value	231,919	284,608
Available For Sales Securities Gross Unrealized Losses	158,647	250,259	173,869
Pooled Trust Preferred [Member]
Trust Preferred Securities Data [Line Items]
Par Value	296,725
Amortized Cost	228,411
Fair Value	101,441
Available For Sales Securities Gross Unrealized Losses	(126,970)
Pooled Trust Preferred [Member] \| Alesco II [Member]
Trust Preferred Securities Data [Line Items]
Par Value	41,646
Amortized Cost	31,540
Fair Value	9,570
Available For Sales Securities Gross Unrealized Losses	(21,970)
Lowest Credit Rating	C
Number of Issuers Currently Performing	31
Number of Issuers Currently Remaining	37
Actual Deferrals and Defaults as Percent of Original Collateral	14.00%
Expected Defaults as Percent of Remaining Performing Collateral	17.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Alesco IV [Member]
Trust Preferred Securities Data [Line Items]
Par Value	20,964
Amortized Cost	8,243
Fair Value	354
Available For Sales Securities Gross Unrealized Losses	(7,889)
Lowest Credit Rating	C
Number of Issuers Currently Performing	31
Number of Issuers Currently Remaining	42
Actual Deferrals and Defaults as Percent of Original Collateral	17.00%
Expected Defaults as Percent of Remaining Performing Collateral	27.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| ICONS [Member]
Trust Preferred Securities Data [Line Items]
Par Value	20,000
Amortized Cost	20,000
Fair Value	12,530
Available For Sales Securities Gross Unrealized Losses	(7,470)
Lowest Credit Rating	BB
Number of Issuers Currently Performing	26
Number of Issuers Currently Remaining	27
Actual Deferrals and Defaults as Percent of Original Collateral	3.00%
Expected Defaults as Percent of Remaining Performing Collateral	18.00%
Excess Subordination	53.00%
Pooled Trust Preferred [Member] \| I-Pre TSL II [Member]
Trust Preferred Securities Data [Line Items]
Par Value	36,657
Amortized Cost	36,559
Fair Value	25,373
Available For Sales Securities Gross Unrealized Losses	(11,186)
Lowest Credit Rating	A
Number of Issuers Currently Performing	27
Number of Issuers Currently Remaining	28
Actual Deferrals and Defaults as Percent of Original Collateral	3.00%
Expected Defaults as Percent of Remaining Performing Collateral	11.00%
Excess Subordination	74.00%
Pooled Trust Preferred [Member] \| MM Comm II [Member]
Trust Preferred Securities Data [Line Items]
Par Value	20,970
Amortized Cost	20,041
Fair Value	19,712
Available For Sales Securities Gross Unrealized Losses	(329)
Lowest Credit Rating	BB
Number of Issuers Currently Performing	4
Number of Issuers Currently Remaining	7
Actual Deferrals and Defaults as Percent of Original Collateral	5.00%
Expected Defaults as Percent of Remaining Performing Collateral	2.00%
Excess Subordination	17.00%
Pooled Trust Preferred [Member] \| MM Comm III [Member]
Trust Preferred Securities Data [Line Items]
Par Value	11,081
Amortized Cost	10,587
Fair Value	7,597
Available For Sales Securities Gross Unrealized Losses	(2,990)
Lowest Credit Rating	CC
Number of Issuers Currently Performing	6
Number of Issuers Currently Remaining	11
Actual Deferrals and Defaults as Percent of Original Collateral	7.00%
Expected Defaults as Percent of Remaining Performing Collateral	10.00%
Excess Subordination	22.00%
Pooled Trust Preferred [Member] \| Pre TSL IX [Member]
Trust Preferred Securities Data [Line Items]
Par Value	5,000
Amortized Cost	3,955
Fair Value	1,272
Available For Sales Securities Gross Unrealized Losses	(2,683)
Lowest Credit Rating	C
Number of Issuers Currently Performing	33
Number of Issuers Currently Remaining	48
Actual Deferrals and Defaults as Percent of Original Collateral	27.00%
Expected Defaults as Percent of Remaining Performing Collateral	22.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Pre TSL X [Member]
Trust Preferred Securities Data [Line Items]
Par Value	17,774
Amortized Cost	9,915
Fair Value	3,036
Available For Sales Securities Gross Unrealized Losses	(6,879)
Lowest Credit Rating	C
Number of Issuers Currently Performing	33
Number of Issuers Currently Remaining	53
Actual Deferrals and Defaults as Percent of Original Collateral	42.00%
Expected Defaults as Percent of Remaining Performing Collateral	37.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Pre TSL XI [Member]
Trust Preferred Securities Data [Line Items]
Par Value	25,426
Amortized Cost	22,667
Fair Value	6,669
Available For Sales Securities Gross Unrealized Losses	(15,998)
Lowest Credit Rating	C
Number of Issuers Currently Performing	44
Number of Issuers Currently Remaining	64
Actual Deferrals and Defaults as Percent of Original Collateral	27.00%
Expected Defaults as Percent of Remaining Performing Collateral	21.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Pre TSL XIII [Member]
Trust Preferred Securities Data [Line Items]
Par Value	28,207
Amortized Cost	22,702
Fair Value	6,943
Available For Sales Securities Gross Unrealized Losses	(15,759)
Lowest Credit Rating	C
Number of Issuers Currently Performing	44
Number of Issuers Currently Remaining	64
Actual Deferrals and Defaults as Percent of Original Collateral	31.00%
Expected Defaults as Percent of Remaining Performing Collateral	21.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Reg Diversified [Member]
Trust Preferred Securities Data [Line Items]
Par Value	25,500
Amortized Cost	7,296
Fair Value	303
Available For Sales Securities Gross Unrealized Losses	(6,993)
Lowest Credit Rating	D
Number of Issuers Currently Performing	23
Number of Issuers Currently Remaining	44
Actual Deferrals and Defaults as Percent of Original Collateral	46.00%
Expected Defaults as Percent of Remaining Performing Collateral	28.00%
Excess Subordination	0.00%
Pooled Trust Preferred [Member] \| Soloso [Member]
Trust Preferred Securities Data [Line Items]
Par Value	12,500
Amortized Cost	3,906
Fair Value	506
Available For Sales Securities Gross Unrealized Losses	(3,400)
Lowest Credit Rating	C
Number of Issuers Currently Performing	43
Number of Issuers Currently Remaining	67
Actual Deferrals and Defaults as Percent of Original Collateral	27.00%
Expected Defaults as Percent of Remaining Performing Collateral	20.00%
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	7,576
Available For Sales Securities Gross Unrealized Losses	$ (23,424)
Lowest Credit Rating	CC
Number of Issuers Currently Performing	23
Number of Issuers Currently Remaining	44
Actual Deferrals and Defaults as Percent of Original Collateral	42.00%
Expected Defaults as Percent of Remaining Performing Collateral	36.00%
Excess Subordination	20.00%