XML 57 R45.htm IDEA: XBRL DOCUMENT
v3.25.3

INVESTMENT SECURITIES AND OTHER SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | $ 1,222 | $ 4,726
Less than 12 Months, Gross Unrealized Losses | (13) | (74)
Over 12 Months, Fair Value | 17,370 | 18,038
Over 12 Months, Gross Unrealized Losses | (2,562) | (3,409)
Total, Fair Value | 18,592 | 22,764
Total, Gross Unrealized Losses | (2,575) | (3,483)
Held-to-maturity securities: |  |
Less than 12 Months, Fair Value | 189 | 1,843
Less than 12 Months, Gross Unrealized Losses | (1) | (25)
Over 12 Months, Fair Value | 11,371 | 11,495
Over 12 Months, Gross Unrealized Losses | (1,747) | (2,260)
Total held-to-maturity securities | 11,560 | 13,338
Total, Gross Unrealized Losses | (1,748) | (2,285)
U.S. Treasury |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 98 | 3,153
Less than 12 Months, Gross Unrealized Losses | (1) | (43)
Over 12 Months, Fair Value | 798 | 0
Over 12 Months, Gross Unrealized Losses | (2) | 0
Total, Fair Value | 896 | 3,153
Total, Gross Unrealized Losses | (3) | (43)
Held-to-maturity securities: |  |
Less than 12 Months, Fair Value | 94 | 1,581
Less than 12 Months, Gross Unrealized Losses | 0 | (22)
Over 12 Months, Fair Value | 362 | 0
Over 12 Months, Gross Unrealized Losses | (1) | 0
Total held-to-maturity securities | 456 | 1,581
Total, Gross Unrealized Losses | (1) | (22)
Total U.S. Treasury, federal agency, and other agency securities |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 360 | 3,692
Less than 12 Months, Gross Unrealized Losses | (1) | (49)
Over 12 Months, Fair Value | 14,693 | 14,299
Over 12 Months, Gross Unrealized Losses | (2,453) | (3,171)
Total, Fair Value | 15,053 | 17,991
Total, Gross Unrealized Losses | (2,454) | (3,220)
Held-to-maturity securities: |  |
Less than 12 Months, Fair Value | 189 | 1,843
Less than 12 Months, Gross Unrealized Losses | (1) | (25)
Over 12 Months, Fair Value | 11,370 | 11,494
Over 12 Months, Gross Unrealized Losses | (1,747) | (2,260)
Total held-to-maturity securities | 11,559 | 13,337
Total, Gross Unrealized Losses | (1,748) | (2,285)
Residential MBS |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 15 | 275
Less than 12 Months, Gross Unrealized Losses | 0 | (5)
Over 12 Months, Fair Value | 9,356 | 9,676
Over 12 Months, Gross Unrealized Losses | (1,461) | (1,966)
Total, Fair Value | 9,371 | 9,951
Total, Gross Unrealized Losses | (1,461) | (1,971)
Held-to-maturity securities: |  |
Less than 12 Months, Fair Value | 45 | 99
Less than 12 Months, Gross Unrealized Losses | (1) | (2)
Over 12 Months, Fair Value | 6,822 | 7,097
Over 12 Months, Gross Unrealized Losses | (1,004) | (1,334)
Total held-to-maturity securities | 6,867 | 7,196
Total, Gross Unrealized Losses | (1,005) | (1,336)
Residential CMO |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 218 | 243
Less than 12 Months, Gross Unrealized Losses | 0 | (1)
Over 12 Months, Fair Value | 2,692 | 2,802
Over 12 Months, Gross Unrealized Losses | (324) | (433)
Total, Fair Value | 2,910 | 3,045
Total, Gross Unrealized Losses | (324) | (434)
Held-to-maturity securities: |  |
Less than 12 Months, Fair Value | 50 | 163
Less than 12 Months, Gross Unrealized Losses | 0 | (1)
Over 12 Months, Fair Value | 3,019 | 3,152
Over 12 Months, Gross Unrealized Losses | (543) | (690)
Total held-to-maturity securities | 3,069 | 3,315
Total, Gross Unrealized Losses | (543) | (691)
Commercial MBS |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Gross Unrealized Losses | 0 | 0
Over 12 Months, Fair Value | 1,782 | 1,752
Over 12 Months, Gross Unrealized Losses | (663) | (767)
Total, Fair Value | 1,782 | 1,752
Total, Gross Unrealized Losses | (663) | (767)
Held-to-maturity securities: |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Gross Unrealized Losses | 0 | 0
Over 12 Months, Fair Value | 1,117 | 1,176
Over 12 Months, Gross Unrealized Losses | (196) | (231)
Total held-to-maturity securities | 1,117 | 1,176
Total, Gross Unrealized Losses | (196) | (231)
Other agencies |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 29 | 21
Less than 12 Months, Gross Unrealized Losses | 0 | 0
Over 12 Months, Fair Value | 65 | 69
Over 12 Months, Gross Unrealized Losses | (3) | (5)
Total, Fair Value | 94 | 90
Total, Gross Unrealized Losses | (3) | (5)
Held-to-maturity securities: |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Gross Unrealized Losses | 0 | 0
Over 12 Months, Fair Value | 50 | 69
Over 12 Months, Gross Unrealized Losses | (3) | (5)
Total held-to-maturity securities | 50 | 69
Total, Gross Unrealized Losses | (3) | (5)
Municipal securities |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 862 | 985
Less than 12 Months, Gross Unrealized Losses | (12) | (25)
Over 12 Months, Fair Value | 2,167 | 2,336
Over 12 Months, Gross Unrealized Losses | (75) | (107)
Total, Fair Value | 3,029 | 3,321
Total, Gross Unrealized Losses | (87) | (132)
Held-to-maturity securities: |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Gross Unrealized Losses | 0 | 0
Over 12 Months, Fair Value | 1 | 1
Over 12 Months, Gross Unrealized Losses | 0 | 0
Total held-to-maturity securities | 1 | 1
Total, Gross Unrealized Losses | 0 | 0
Corporate debt |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Gross Unrealized Losses | 0 | 0
Over 12 Months, Fair Value | 175 | 1,053
Over 12 Months, Gross Unrealized Losses | (17) | (102)
Total, Fair Value | 175 | 1,053
Total, Gross Unrealized Losses | (17) | (102)
Asset-backed securities |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 0 | 49
Less than 12 Months, Gross Unrealized Losses | 0 | 0
Over 12 Months, Fair Value | 254 | 263
Over 12 Months, Gross Unrealized Losses | (10) | (19)
Total, Fair Value | 254 | 312
Total, Gross Unrealized Losses | (10) | (19)
Private-label CMO |  |
Available-for-sale securities: |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Gross Unrealized Losses | 0 | 0
Over 12 Months, Fair Value | 81 | 87
Over 12 Months, Gross Unrealized Losses | (7) | (10)
Total, Fair Value | 81 | 87
Total, Gross Unrealized Losses | $ (7) | $ (10)

X
- References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_HeldToMaturitySecuritiesClassifiedAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for less than 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for 12 months or longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedMortgageObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=hban_OtherFederalAgenciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |