Huntington Bancshares Incorporated Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- SIGNIFICANT ACCOUNTING POLICIES (Policies)
Notes Tables
Notes Details

INVESTMENT SECURITIES AND OTHER SECURITIES (Details)

v3.10.0.1

INVESTMENT SECURITIES AND OTHER SECURITIES (Details)	12 Months Ended
INVESTMENT SECURITIES AND OTHER SECURITIES (Details)	Dec. 31, 2018 USD ($)
Investments, Debt and Equity Securities [Abstract]
Held to Maturity Securities Transferred to Available for Sale Securities Upon Adoption of ASU	$ 3,000,000,000
Unrealized Net Losses Recognized In OCI At Time Of Transfer Of Held To Maturity Securities To Available For Sale Securities	26,000,000
Available for Sale Securities Transferred to Held to Maturity Securities Upon Adoption of ASU	3,000,000,000
Unrealized Net Losses Recognized In OCI At Time Of Transfer Of Available For Sale Securities Transferred To Held To Maturity Securities	56,000,000
Pledged Financial Instruments, Not Separately Reported, Securities for Other Debt Facilities	5,000,000,000
Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings	0
Other-than-temporary Impairment Loss, Equity Securities, Portion Recognized in Earnings	$ 0

- Definition

Available for Sale Securities Transferred to Held to Maturity Securities Upon Adoption of ASU

+ References

No definition available.

+ Details

Name:	hban_AvailableforSaleSecuritiesTransferredtoHeldtoMaturitySecuritiesUponAdoptionofASU
Namespace Prefix:	hban_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Held to Maturity Securities Transferred to Available for Sale Securities Upon Adoption of ASU

+ References

No definition available.

+ Details

Name:	hban_HeldtoMaturitySecuritiesTransferredtoAvailableforSaleSecuritiesUponAdoptionofASU
Namespace Prefix:	hban_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Other-than-temporary Impairment Loss, Equity Securities, Portion Recognized in Earnings

+ References

No definition available.

+ Details

Name:	hban_OtherthantemporaryImpairmentLossEquitySecuritiesPortionRecognizedinEarnings
Namespace Prefix:	hban_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Unrealized Net Losses Recognized In OCI At Time Of Transfer Of Available For Sale Securities Transferred To Held To Maturity Securities

+ References

No definition available.

+ Details

Name:	hban_UnrealizedNetLossesRecognizedInOCIAtTimeOfTransferOfAvailableForSaleSecuritiesTransferredToHeldToMaturitySecurities
Namespace Prefix:	hban_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Unrealized Net Losses Recognized In OCI At Time Of Transfer Of Held To Maturity Securities To Available For Sale Securities

+ References

No definition available.

+ Details

Name:	hban_UnrealizedNetLossesRecognizedInOCIAtTimeOfTransferOfHeldToMaturitySecuritiesToAvailableForSaleSecurities
Namespace Prefix:	hban_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of other-than-temporary impairment (OTTI) on investment in debt security, recognized in earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
-URI http://asc.fasb.org/extlink&oid=109979856&loc=SL6284422-111562

+ Details

Name:	us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for debt facilities other than FHLB loans, repurchase agreements and letter of credit arrangements, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729

+ Details

Name:	us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForOtherDebtFacilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant