0000930413-20-000605.txt : 20200228 0000930413-20-000605.hdr.sgml : 20200228 20200227194221 ACCESSION NUMBER: 0000930413-20-000605 CONFORMED SUBMISSION TYPE: 10-K PUBLIC DOCUMENT COUNT: 192 CONFORMED PERIOD OF REPORT: 20191231 FILED AS OF DATE: 20200228 DATE AS OF CHANGE: 20200227 FILER: COMPANY DATA: COMPANY CONFORMED NAME: FIRST HORIZON NATIONAL CORP CENTRAL INDEX KEY: 0000036966 STANDARD INDUSTRIAL CLASSIFICATION: NATIONAL COMMERCIAL BANKS [6021] IRS NUMBER: 620803242 STATE OF INCORPORATION: TN FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 10-K SEC ACT: 1934 Act SEC FILE NUMBER: 001-15185 FILM NUMBER: 20664949 BUSINESS ADDRESS: STREET 1: 165 MADISON AVENUE CITY: MEMPHIS STATE: TN ZIP: 38103 BUSINESS PHONE: 9018186232 MAIL ADDRESS: STREET 1: 165 MADISON AVENUE CITY: MEMPHIS STATE: TN ZIP: 38103 FORMER COMPANY: FORMER CONFORMED NAME: FIRST TENNESSEE NATIONAL CORP DATE OF NAME CHANGE: 19920703 FORMER COMPANY: FORMER CONFORMED NAME: FIRST TENNESSEE BANKS INC DATE OF NAME CHANGE: 19600201 10-K 1 c95148_10k-ixbrl.htm Document
false--12-31FY201900000369660.00070.0100P6M5800000000500000000060000000005400000000P3Y0.500.250.100.200.000.000.500.250.100.200.000.000.150.250.000.000.150.250.000.00P2Y650000.000252737000001960000097000000.6250.6254000000004000000003185734003114690560.02660.03090.02190.0950.04160.03990.04440.04470.04120.04190.04330.04170.03500.02950.02380.0950.03260.03540.03540.03570.03280.03290.03430.03320.03500.02950.120.140.110.170.160.120.03950.03870.03370.04560.04030.03440.02850.04570.03680.03870.03350.04560.04040.25480.10180.50390.1015013000003000000.250.101.000.120.660.120.020.020.500.050.500.080.090.240.140.720.120.660.120.030.030.000.000.500.080.092948000000.100.000.100.00062006200620010000010000010001000100010000.29440.25260.26450.24360.23950.2307 0000036966 2019-01-01 2019-12-31 0000036966 2020-01-31 0000036966 2019-06-30 0000036966 us-gaap:SeriesAPreferredStockMember 2019-01-01 2019-12-31 0000036966 us-gaap:CommonClassAMember 2019-01-01 2019-12-31 0000036966 us-gaap:ResidentialRealEstateMember 2019-12-31 0000036966 us-gaap:ResidentialRealEstateMember 2018-12-31 0000036966 fhn:LoansHeldForSaleResidentialRealEstateMember us-gaap:ResidentialRealEstateMember 2018-12-31 0000036966 fhn:LoansHeldForSaleResidentialRealEstateMember us-gaap:ResidentialRealEstateMember 2019-12-31 0000036966 2018-12-31 0000036966 2019-12-31 0000036966 2017-01-01 2017-12-31 0000036966 2018-01-01 2018-12-31 0000036966 fhn:FirstHorizonShareRepurchaseProgramMember 2018-01-01 2018-12-31 0000036966 fhn:FirstHorizonShareRepurchaseProgramMember 2019-01-01 2019-12-31 0000036966 us-gaap:PreferredStockIncludingAdditionalPaidInCapitalMember 2018-12-31 0000036966 us-gaap:AccountingStandardsUpdate201602Member 2018-12-31 0000036966 us-gaap:NoncontrollingInterestMember 2018-12-31 0000036966 us-gaap:CommonStockMember 2018-01-01 2018-12-31 0000036966 us-gaap:AdditionalPaidInCapitalMember 2018-01-01 2018-12-31 0000036966 us-gaap:AdditionalPaidInCapitalMember 2018-12-31 0000036966 2017-12-31 0000036966 us-gaap:AdditionalPaidInCapitalMember 2017-12-31 0000036966 us-gaap:RetainedEarningsUnappropriatedMember 2017-01-01 2017-12-31 0000036966 us-gaap:CommonStockMember 2018-12-31 0000036966 us-gaap:CommonStockMember 2019-01-01 2019-12-31 0000036966 us-gaap:NoncontrollingInterestMember 2018-01-01 2018-12-31 0000036966 us-gaap:RetainedEarningsUnappropriatedMember 2019-01-01 2019-12-31 0000036966 us-gaap:RetainedEarningsUnappropriatedMember 2017-12-31 0000036966 us-gaap:CommonStockMember 2017-12-31 0000036966 us-gaap:NoncontrollingInterestMember 2019-01-01 2019-12-31 0000036966 us-gaap:RetainedEarningsUnappropriatedMember 2016-12-31 0000036966 us-gaap:AccountingStandardsUpdate201802Member us-gaap:RetainedEarningsUnappropriatedMember 2017-12-31 0000036966 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-01-01 2017-12-31 0000036966 us-gaap:AdditionalPaidInCapitalMember 2017-01-01 2017-12-31 0000036966 us-gaap:AdditionalPaidInCapitalMember 2016-12-31 0000036966 us-gaap:NoncontrollingInterestMember 2017-01-01 2017-12-31 0000036966 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-01-01 2019-12-31 0000036966 us-gaap:PreferredStockIncludingAdditionalPaidInCapitalMember 2016-12-31 0000036966 us-gaap:NoncontrollingInterestMember 2019-12-31 0000036966 2016-12-31 0000036966 us-gaap:AdditionalPaidInCapitalMember 2019-01-01 2019-12-31 0000036966 us-gaap:AdditionalPaidInCapitalMember 2019-12-31 0000036966 us-gaap:AccountingStandardsUpdate201609Member us-gaap:RetainedEarningsUnappropriatedMember 2016-12-31 0000036966 us-gaap:AccountingStandardsUpdate201602Member us-gaap:RetainedEarningsUnappropriatedMember 2018-12-31 0000036966 fhn:AccountingStandardsUpdate201601and201712Member 2017-12-31 0000036966 us-gaap:RetainedEarningsUnappropriatedMember 2018-12-31 0000036966 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2016-12-31 0000036966 fhn:AccountingStandardsUpdate201601and201712Member us-gaap:RetainedEarningsUnappropriatedMember 2017-12-31 0000036966 fhn:AccountingStandardsUpdate201601and201712Member us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0000036966 us-gaap:CommonStockMember 2019-12-31 0000036966 us-gaap:RetainedEarningsUnappropriatedMember 2018-01-01 2018-12-31 0000036966 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-12-31 0000036966 us-gaap:PreferredStockIncludingAdditionalPaidInCapitalMember 2017-12-31 0000036966 us-gaap:CommonStockMember 2016-12-31 0000036966 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-01-01 2018-12-31 0000036966 us-gaap:NoncontrollingInterestMember 2016-12-31 0000036966 us-gaap:CommonStockMember 2017-01-01 2017-12-31 0000036966 us-gaap:NoncontrollingInterestMember 2017-12-31 0000036966 us-gaap:RetainedEarningsUnappropriatedMember 2019-12-31 0000036966 us-gaap:PreferredStockIncludingAdditionalPaidInCapitalMember 2019-12-31 0000036966 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-12-31 0000036966 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0000036966 us-gaap:AccountingStandardsUpdate201802Member us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0000036966 us-gaap:AccountingStandardsUpdate201609Member us-gaap:AdditionalPaidInCapitalMember 2016-12-31 0000036966 fhn:PortionofSubprimeAutoLoanPortfoliosMember 2018-12-31 0000036966 fhn:PortionofSubprimeAutoLoanPortfoliosMember 2018-01-01 2018-12-31 0000036966 us-gaap:AccountingStandardsUpdate201602Member 2019-01-01 0000036966 srt:MinimumMember us-gaap:BuildingMember 2019-01-01 2019-12-31 0000036966 srt:MaximumMember us-gaap:BuildingMember 2019-01-01 2019-12-31 0000036966 srt:MinimumMember us-gaap:FurnitureAndFixturesMember 2019-01-01 2019-12-31 0000036966 fhn:NonInterestincomeMember 2019-12-31 0000036966 fhn:NonAccruingMember srt:MinimumMember 2019-12-31 0000036966 fhn:DepositBasesMember 2019-01-01 2019-12-31 0000036966 us-gaap:GovernmentGuaranteedMortgageLoansUponForeclosureReceivableMember 2019-12-31 0000036966 srt:MaximumMember us-gaap:FurnitureAndFixturesMember 2019-01-01 2019-12-31 0000036966 srt:ScenarioForecastMember us-gaap:AccountingStandardsUpdate201613Member us-gaap:SubsequentEventMember 2020-01-01 2020-01-01 0000036966 fhn:FhnMember srt:ScenarioForecastMember us-gaap:AccountingStandardsUpdate201613Member us-gaap:SubsequentEventMember 2020-01-01 2020-01-01 0000036966 fhn:FhnMember srt:ScenarioForecastMember us-gaap:AccountingStandardsUpdate201613Member us-gaap:SubsequentEventMember 2020-01-01 0000036966 fhn:CapitalBankFinancialCorpMember 2017-12-01 2017-12-31 0000036966 fhn:CapitalBankFinancialCorpMember 2016-01-01 2016-12-31 0000036966 fhn:CapitalBankFinancialCorpMember 2017-01-01 2017-12-31 0000036966 fhn:IBERIABANKCorporationMember 2019-01-01 2019-12-31 0000036966 fhn:IBERIABANKCorporationMember fhn:MiscellaneousExpenseMember 2019-01-01 2019-12-31 0000036966 fhn:IBERIABANKCorporationMember fhn:EmployeeCompensationIncentivesAndBenefitsMember 2019-01-01 2019-12-31 0000036966 fhn:IBERIABANKCorporationMember fhn:ProfessionalFeesMember 2019-01-01 2019-12-31 0000036966 srt:RestatementAdjustmentMember fhn:CoastalSecuritiesIncMember 2017-04-03 0000036966 fhn:CoastalSecuritiesIncMember 2017-04-03 0000036966 fhn:CoastalSecuritiesIncMember 2017-04-03 0000036966 fhn:CoastalSecuritiesIncMember 2017-04-03 2017-04-03 0000036966 fhn:CapitalBankFinancialCorpMember fhn:EliminateAmortizationOfPremiumsAndAccretionOfDiscountsMember 2016-01-01 2016-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:AmortizationOfAcquiredIntangiblesMember 2017-01-01 2017-12-31 0000036966 fhn:CapitalBankFinancialCorpMember 2017-11-30 0000036966 fhn:ApexBankMember 2018-03-23 2018-03-23 0000036966 us-gaap:DiscontinuedOperationsHeldforsaleMember fhn:SubprimeConsumerLoansMember 2019-04-30 0000036966 fhn:CapitalBankFinancialCorpMember 2017-11-30 2017-11-30 0000036966 fhn:PortionofSubprimeAutoLoanPortfoliosMember 2018-06-30 0000036966 stpr:NC fhn:SunTrustBanksInc.BranchesMember 2019-11-08 0000036966 fhn:CapitalBankFinancialCorpMember fhn:AmortizationOfAcquiredIntangiblesMember 2016-01-01 2016-12-31 0000036966 fhn:CapitalBankFinancialCorpMember 2018-04-01 2018-06-30 0000036966 fhn:SunTrustBanksInc.BranchesMember 2019-11-08 0000036966 fhn:ApexBankMember 2018-03-23 0000036966 fhn:IBERIABANKCorporationMember 2019-11-04 2019-11-04 0000036966 fhn:CapitalBankFinancialCorpMember fhn:AmortizationOfPremiumsAndAccretionOfDiscountsMember 2017-01-01 2017-12-31 0000036966 2017-11-30 0000036966 fhn:IBERIABANKDIRECTORSMember 2019-11-04 2019-11-04 0000036966 fhn:CapitalBankFinancialCorpMember fhn:AmortizationOfPremiumsAndAccretionOfDiscountsMember 2016-01-01 2016-12-31 0000036966 fhn:IBERIABANKCorporationMember 2019-12-31 0000036966 stpr:GA fhn:SunTrustBanksInc.BranchesMember 2019-11-08 0000036966 fhn:IBERIABANKCorporationMember 2019-11-04 0000036966 fhn:CapitalBankFinancialCorpMember fhn:EliminateAmortizationOfPremiumsAndAccretionOfDiscountsMember 2017-01-01 2017-12-31 0000036966 fhn:FHNDIRECTORSMember fhn:IBERIABANKCorporationMember 2019-11-04 2019-11-04 0000036966 fhn:SunTrustBanksInc.BranchesMember 2019-11-08 2019-11-08 0000036966 fhn:IBERIABANKCorporationMember 2019-11-04 2019-11-04 0000036966 stpr:VA fhn:SunTrustBanksInc.BranchesMember 2019-11-08 0000036966 fhn:CapitalBankFinancialCorpMember fhn:MiscellaneousExpenseMember 2019-01-01 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:ProfessionalFeesMember 2017-01-01 2017-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:EmployeeCompensationIncentivesAndBenefitsMember 2019-01-01 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:MiscellaneousExpenseMember 2017-01-01 2017-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:ProfessionalFeesMember 2019-01-01 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember 2019-01-01 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:EmployeeCompensationIncentivesAndBenefitsMember 2017-01-01 2017-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:ProfessionalFeesMember 2018-01-01 2018-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:OccupancyNetMember 2018-01-01 2018-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:MiscellaneousExpenseMember 2018-01-01 2018-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:ContractEmploymentAndOutsourcingMember 2018-01-01 2018-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:AllOtherExpenseMember 2019-01-01 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember 2018-01-01 2018-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:OccupancyNetMember 2017-01-01 2017-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:ContractEmploymentAndOutsourcingMember 2017-01-01 2017-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:OccupancyNetMember 2019-01-01 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:ContractEmploymentAndOutsourcingMember 2019-01-01 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:AllOtherExpenseMember 2018-01-01 2018-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:EmployeeCompensationIncentivesAndBenefitsMember 2018-01-01 2018-12-31 0000036966 fhn:CapitalBankFinancialCorpMember fhn:AllOtherExpenseMember 2017-01-01 2017-12-31 0000036966 srt:RestatementAdjustmentMember fhn:CapitalBankFinancialCorpMember 2017-12-31 0000036966 fhn:CapitalBankFinancialCorpMember 2017-11-30 0000036966 srt:RestatementAdjustmentMember fhn:CapitalBankFinancialCorpMember 2018-12-31 0000036966 fhn:CapitalBankFinancialCorpMember 2017-11-30 2018-06-30 0000036966 us-gaap:USStatesAndPoliticalSubdivisionsMember 2019-12-31 0000036966 us-gaap:CollateralizedMortgageObligationsMember 2019-12-31 0000036966 us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember 2019-12-31 0000036966 fhn:OtherUSGovernmentAgenciesMember 2019-12-31 0000036966 us-gaap:USTreasurySecuritiesMember 2019-12-31 0000036966 fhn:AvailableforSaleSecuritiesExcludingDebtSecuritiesRecordedatFairValueThroughEarningsMember 2019-12-31 0000036966 us-gaap:CorporateDebtSecuritiesMember 2019-12-31 0000036966 fhn:CorporateAndOtherDebtMember 2019-12-31 0000036966 us-gaap:InterestOnlyStripMember 2019-12-31 0000036966 fhn:VisaClassBSharesMember 2018-01-01 2018-12-31 0000036966 us-gaap:USTreasuryAndGovernmentMember 2019-12-31 0000036966 us-gaap:USStatesAndPoliticalSubdivisionsMember 2018-12-31 0000036966 us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember 2018-12-31 0000036966 us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0000036966 us-gaap:USTreasurySecuritiesMember 2018-12-31 0000036966 fhn:AvailableforSaleSecuritiesExcludingDebtSecuritiesRecordedatFairValueThroughEarningsMember 2018-12-31 0000036966 fhn:CorporateAndOtherDebtMember 2018-12-31 0000036966 fhn:OtherUSGovernmentAgenciesMember 2018-12-31 0000036966 us-gaap:CollateralizedMortgageObligationsMember 2018-12-31 0000036966 us-gaap:InterestOnlyStripMember 2018-12-31 0000036966 us-gaap:USTreasuryAndGovernmentMember 2018-12-31 0000036966 fhn:LoansHeldForSaleResidentialRealEstateMember 2019-12-31 0000036966 srt:MaximumMember us-gaap:CommercialPortfolioSegmentMember us-gaap:PassMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-09-30 0000036966 fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:HelocAndRealEstateInstallmentClassesMember srt:MinimumMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:CreditCardClassMember srt:MaximumMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-01-01 2019-12-31 0000036966 fhn:AllowanceForTdrsToRecordedInvestmentOfTdrsMember 2018-12-31 0000036966 srt:MinimumMember fhn:LoanReassessedMember 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 srt:MaximumMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 srt:MaximumMember us-gaap:PassMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:FinanceAndInsuranceCompaniesMember 2019-12-31 0000036966 fhn:AllowanceForTdrsToRecordedInvestmentOfTdrsMember 2019-12-31 0000036966 us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember 2018-12-31 0000036966 fhn:CommercialLoanPDGradeOneMember 2019-12-31 0000036966 fhn:HelocAndRealEstateInstallmentClassesMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember 2018-01-01 2018-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:UnlikelyToBeCollectedFinancingReceivableMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:LoansToMortgageCompaniesMember 2019-12-31 0000036966 srt:RestatementAdjustmentMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-09-30 0000036966 fhn:CreditCardClassMember srt:MinimumMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-01-01 2019-12-31 0000036966 us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember 2019-01-01 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember us-gaap:ResidentialRealEstateMember 2019-01-01 2019-12-31 0000036966 us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember 2019-12-31 0000036966 fhn:LoansHeldForSaleResidentialRealEstateMember 2018-12-31 0000036966 srt:MinimumMember us-gaap:PassMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:FinanceInsuranceAndLoansToMortgageCompaniesMember 2019-12-31 0000036966 srt:MinimumMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:SubstandardMember 2019-12-31 0000036966 srt:MinimumMember us-gaap:CommercialPortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember 2017-11-30 0000036966 us-gaap:CommercialPortfolioSegmentMember us-gaap:SpecialMentionMember 2019-12-31 0000036966 srt:MinimumMember us-gaap:SpecialMentionMember 2019-12-31 0000036966 srt:MinimumMember us-gaap:CommercialPortfolioSegmentMember us-gaap:PassMember 2019-12-31 0000036966 us-gaap:DoubtfulMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 fhn:HelocAndRealEstateInstallmentClassesMember srt:MinimumMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 srt:MinimumMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 srt:MinimumMember fhn:CommercialLoanPDGradeThirteenMember 2019-12-31 0000036966 srt:MaximumMember us-gaap:CommercialPortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 srt:MaximumMember fhn:CommercialLoanLGDGradeTwelveMember 2019-12-31 0000036966 srt:MaximumMember us-gaap:UnlikelyToBeCollectedFinancingReceivableMember 2019-12-31 0000036966 us-gaap:SpecialMentionMember 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:RestrictedAndSecuredConsumerRealEstateLoansMember 2018-12-31 0000036966 fhn:HelocAndRealEstateInstallmentClassesMember srt:MaximumMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 srt:MinimumMember fhn:CommercialLoanLGDGradeOneMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2018-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2018-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2018-12-31 0000036966 us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember 2019-12-31 0000036966 fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-01-01 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-01-01 2018-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember 2019-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:AccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2019-12-31 0000036966 fhn:AccruingMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2019-12-31 0000036966 fhn:AccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2019-12-31 0000036966 fhn:AccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:NonAccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2019-12-31 0000036966 fhn:FicoscoreMember us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2018-12-31 0000036966 fhn:FicoScoreLessThan620Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:FicoScore620To659Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2019-12-31 0000036966 fhn:FicoScoreLessThan620Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2018-12-31 0000036966 fhn:FicoScore720To739Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:FicoScoreLessThan620Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2018-12-31 0000036966 fhn:FicoScore620To659Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 fhn:FicoScore660To699Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2018-12-31 0000036966 fhn:FicoScoreLessThan620Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2019-12-31 0000036966 fhn:FicoScoreLessThan620Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 fhn:FicoScore720To739Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2019-12-31 0000036966 fhn:FicoScore660To699Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2018-12-31 0000036966 fhn:FicoscoreMember us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2018-12-31 0000036966 fhn:FicoScore700To719Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2019-12-31 0000036966 fhn:FicoScore720To739Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2019-12-31 0000036966 fhn:FicoScore700To719Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2019-12-31 0000036966 fhn:FicoScore700To719Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2018-12-31 0000036966 fhn:FicoScore700To719Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 fhn:FicoScoreGreaterThanEqualTo740Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2018-12-31 0000036966 fhn:FicoScore720To739Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 fhn:FicoScoreGreaterThanEqualTo740Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2019-12-31 0000036966 fhn:FicoScore660To699Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2019-12-31 0000036966 fhn:FicoscoreMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 fhn:FicoScore620To659Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2019-12-31 0000036966 fhn:FicoScore660To699Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 fhn:FicoScoreGreaterThanEqualTo740Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 fhn:FicoScore620To659Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:FicoScore720To739Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2018-12-31 0000036966 fhn:FicoScore620To659Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2018-12-31 0000036966 fhn:FicoScoreGreaterThanEqualTo740Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2018-12-31 0000036966 fhn:FicoScore660To699Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:FicoScoreLessThan620Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2019-12-31 0000036966 fhn:FicoScore620To659Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2018-12-31 0000036966 fhn:FicoscoreMember us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2019-12-31 0000036966 fhn:FicoscoreMember us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2019-12-31 0000036966 fhn:FicoScoreGreaterThanEqualTo740Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:FicoScoreGreaterThanEqualTo740Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2019-12-31 0000036966 fhn:FicoScore700To719Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2018-12-31 0000036966 fhn:FicoScore700To719Member us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:FicoscoreMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2019-12-31 0000036966 fhn:FicoScore720To739Member us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2018-12-31 0000036966 fhn:FicoScore660To699Member us-gaap:ConsumerPortfolioSegmentMember fhn:REInstallmentLoansMember 2019-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-01-01 2018-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2019-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeSevenMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeElevenMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTwelveMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeThirteenMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeOneMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeFourteenFifteenSixteenMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFiveMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeTenMember 2019-12-31 0000036966 fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeFourMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeThreeMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeNineMember 2019-12-31 0000036966 fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2019-12-31 0000036966 fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeEightMember 2019-12-31 0000036966 fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:CommercialLoanPDGradeSixMember 2019-12-31 0000036966 fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:CommercialLoanPDGradeTwoMember 2019-12-31 0000036966 fhn:NonAccruingMember 2018-12-31 0000036966 fhn:AccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:AccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:AccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:AccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:ResidentialCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:AccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:AccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:CREPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:CreditCardClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:TRUPsMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-12-31 0000036966 fhn:AccruingMember fhn:OtherPurchasedCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:REInstallmentPurchaseCreditImpairedLoansMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:GeneralCIMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:IncomeCREMember us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember us-gaap:HomeEquityMember us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:CIPurchaseCreditImpairedLoansMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember fhn:LoansToMortgageCompaniesMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2018-12-31 0000036966 fhn:NonAccruingMember fhn:OtherConsumerLoansClassMember us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 fhn:AccruingMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember fhn:FinancingReceivables30To89DaysPastDueMember 2018-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2017-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2017-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2017-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2016-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2017-01-01 2017-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2017-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2016-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2016-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2017-01-01 2017-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:PermanentMortgagePortfolioSegmentMember 2017-01-01 2017-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:ConsumerRealEstatePortfolioSegmentMember 2017-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2016-12-31 0000036966 us-gaap:ConsumerPortfolioSegmentMember fhn:CreditCardAndOtherMember 2017-01-01 2017-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2016-12-31 0000036966 us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2017-01-01 2017-12-31 0000036966 srt:RestatementAdjustmentMember us-gaap:CommercialPortfolioSegmentMember fhn:CommercialFinancialAndIndustrialPortfolioSegmentMember 2018-09-30 0000036966 fhn:NonStrategicMember 2019-12-31 0000036966 us-gaap:LicensingAgreementsMember 2019-12-31 0000036966 fhn:FixedIncomeMember 2017-01-01 2017-12-31 0000036966 fhn:FixedIncomeMember 2019-01-01 2019-12-31 0000036966 fhn:FixedIncomeMember 2017-12-31 0000036966 fhn:FixedIncomeMember 2016-12-31 0000036966 fhn:FixedIncomeMember 2018-01-01 2018-12-31 0000036966 fhn:RegionalBankingMember 2016-12-31 0000036966 fhn:RegionalBankingMember 2018-12-31 0000036966 fhn:RegionalBankingMember 2019-12-31 0000036966 fhn:RegionalBankingMember 2017-01-01 2017-12-31 0000036966 fhn:RegionalBankingMember 2019-01-01 2019-12-31 0000036966 fhn:FixedIncomeMember 2018-12-31 0000036966 fhn:RegionalBankingMember 2017-12-31 0000036966 fhn:RegionalBankingMember 2018-01-01 2018-12-31 0000036966 fhn:FixedIncomeMember 2019-12-31 0000036966 us-gaap:CustomerRelationshipsMember 2019-12-31 0000036966 us-gaap:OtherIntangibleAssetsMember 2019-12-31 0000036966 us-gaap:CoreDepositsMember 2019-12-31 0000036966 us-gaap:OtherIntangibleAssetsMember 2018-12-31 0000036966 us-gaap:CoreDepositsMember 2018-12-31 0000036966 us-gaap:CustomerRelationshipsMember 2018-12-31 0000036966 us-gaap:LicensingAgreementsMember 2018-12-31 0000036966 fhn:NonStrategicMember 2018-12-31 0000036966 us-gaap:FederalFundsPurchasedMember 2019-01-01 2019-12-31 0000036966 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2019-01-01 2019-12-31 0000036966 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2019-12-31 0000036966 fhn:OtherShortTermBorrowingsMember 2018-01-01 2018-12-31 0000036966 us-gaap:TradingLiabilitiesMember 2017-12-31 0000036966 fhn:OtherShortTermBorrowingsMember 2017-12-31 0000036966 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2017-01-01 2017-12-31 0000036966 us-gaap:FederalFundsPurchasedMember 2017-01-01 2017-12-31 0000036966 us-gaap:TradingLiabilitiesMember 2019-01-01 2019-12-31 0000036966 us-gaap:TradingLiabilitiesMember 2017-01-01 2017-12-31 0000036966 us-gaap:TradingLiabilitiesMember 2018-12-31 0000036966 us-gaap:FederalFundsPurchasedMember 2018-12-31 0000036966 fhn:OtherShortTermBorrowingsMember 2019-01-01 2019-12-31 0000036966 fhn:OtherShortTermBorrowingsMember 2018-12-31 0000036966 fhn:OtherShortTermBorrowingsMember 2019-12-31 0000036966 fhn:OtherShortTermBorrowingsMember 2017-01-01 2017-12-31 0000036966 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2018-01-01 2018-12-31 0000036966 us-gaap:FederalFundsPurchasedMember 2017-12-31 0000036966 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2017-12-31 0000036966 us-gaap:FederalFundsPurchasedMember 2018-01-01 2018-12-31 0000036966 us-gaap:TradingLiabilitiesMember 2019-12-31 0000036966 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2018-12-31 0000036966 us-gaap:TradingLiabilitiesMember 2018-01-01 2018-12-31 0000036966 us-gaap:FederalFundsPurchasedMember 2019-12-31 0000036966 us-gaap:FixedIncomeSecuritiesMember 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember us-gaap:JuniorSubordinatedDebtMember 2017-11-30 2017-11-30 0000036966 fhn:FirstHorizonBankMember srt:MaximumMember fhn:OtherCollateralizedBorrowingsSBALoansMember fhn:CollateralizedByLoansMember 2019-01-01 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember us-gaap:JuniorSubordinatedDebtMember 2017-11-30 0000036966 fhn:FirstHorizonBankMember srt:MinimumMember fhn:OtherCollateralizedBorrowingsSBALoansMember fhn:CollateralizedByLoansMember 2019-01-01 2019-12-31 0000036966 fhn:RetailRealEstateResidentialMember 2018-12-31 0000036966 fhn:FirstHorizonBankMember fhn:OtherCollateralizedBorrowingsSBALoansMember fhn:CollateralizedByLoansMember 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember us-gaap:JuniorSubordinatedDebtMember 2018-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateDecember152035Member us-gaap:JuniorSubordinatedDebtMember 2018-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateMarch152036Member us-gaap:JuniorSubordinatedDebtMember 2019-12-31 0000036966 fhn:FirstHorizonABSTrustsMember fhn:DebtInstrumentMaturityDateOctoberTwentyFiveTwoThousandThrityFourMember fhn:CollateralizedByLoansMember 2018-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateJune152037Member us-gaap:JuniorSubordinatedDebtMember 2018-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateSeptember62037Member us-gaap:JuniorSubordinatedDebtMember 2018-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateMarch152036Member us-gaap:JuniorSubordinatedDebtMember 2018-12-31 0000036966 fhn:FTRealEstateSecuritiesCompanyInc.Member fhn:DebtInstrumentMaturityDateMarchThirtyFirstTwoThousandThrityOneInterestRateNinePointFiveZeroPercentMember us-gaap:CumulativePreferredStockMember 2019-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateJune282035Member us-gaap:JuniorSubordinatedDebtMember 2018-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateJune302036Member us-gaap:JuniorSubordinatedDebtMember 2019-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateJune282035Member us-gaap:JuniorSubordinatedDebtMember 2019-12-31 0000036966 fhn:FirstHorizonBankMember fhn:OtherCollateralizedBorrowingsMaturityDateDecember3122017Member fhn:CollateralizedByLoansMember 2018-12-31 0000036966 fhn:FirstTennesseeNewMarketCorporationInvestmentsMember fhn:DebtInstrumentMaturityDateAugustEightTwoThousandThirtySixInterestRateTwoPointThreeEightPercentMember 2018-12-31 0000036966 fhn:FirstHorizonBankMember fhn:SeniorCapitalNotesMaturityDateDecember12019Rate2.95Member us-gaap:SeniorNotesMember 2018-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateJune302036Member us-gaap:JuniorSubordinatedDebtMember 2018-12-31 0000036966 fhn:FirstTennesseeNewMarketCorporationInvestmentsMember fhn:DebtInstrumentMaturityDateAugustEightTwoThousandThirtySixInterestRateTwoPointThreeEightPercentMember 2019-12-31 0000036966 fhn:FhnMember fhn:SeniorCapitalNotesMaturityDecember152020Rate3.50Member us-gaap:SeniorNotesMember 2018-12-31 0000036966 fhn:FirstHorizonBankMember fhn:SeniorCapitalNotesMaturityDateDecember12019Rate2.95Member us-gaap:SeniorNotesMember 2019-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateMarch152036Rate4.33in2018and3.13In2017Member us-gaap:JuniorSubordinatedDebtMember 2018-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateJune152037Member us-gaap:JuniorSubordinatedDebtMember 2019-12-31 0000036966 fhn:FTRealEstateSecuritiesCompanyInc.Member fhn:DebtInstrumentMaturityDateMarchThirtyFirstTwoThousandThrityOneInterestRateNinePointFiveZeroPercentMember us-gaap:CumulativePreferredStockMember 2018-12-31 0000036966 fhn:FirstHorizonABSTrustsMember fhn:DebtInstrumentMaturityDateOctoberTwentyFiveTwoThousandThrityFourMember fhn:CollateralizedByLoansMember 2019-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateJuly72036Member us-gaap:JuniorSubordinatedDebtMember 2019-12-31 0000036966 fhn:FirstHorizonBankMember fhn:OtherCollateralizedBorrowingsSBALoansMember fhn:CollateralizedByLoansMember 2018-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateJuly72036Member us-gaap:JuniorSubordinatedDebtMember 2018-12-31 0000036966 fhn:FirstHorizonBankMember fhn:OtherCollateralizedBorrowingsMaturityDateDecember3122017Member fhn:CollateralizedByLoansMember 2019-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateDecember152035Member us-gaap:JuniorSubordinatedDebtMember 2019-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateMarch152036Rate4.33in2018and3.13In2017Member us-gaap:JuniorSubordinatedDebtMember 2019-12-31 0000036966 fhn:FhnMember fhn:SeniorCapitalNotesMaturityDecember152020Rate3.50Member us-gaap:SeniorNotesMember 2019-12-31 0000036966 fhn:FhnMember fhn:JuniorSubordinatedDebenturesMaturityDateSeptember62037Member us-gaap:JuniorSubordinatedDebtMember 2019-12-31 0000036966 fhn:FhnMember us-gaap:SeriesAPreferredStockMember 2013-01-31 0000036966 fhn:FirstHorizonBankMember us-gaap:PreferredClassAMember 2019-12-31 0000036966 fhn:FirstHorizonBankMember us-gaap:NoncumulativePreferredStockMember 2005-01-01 2005-12-31 0000036966 fhn:FTRealEstateSecuritiesCompanyInc.Member fhn:NonAffiliatesMember us-gaap:PreferredClassBMember 2000-01-01 2000-12-31 0000036966 fhn:FTRealEstateSecuritiesCompanyInc.Member us-gaap:PreferredClassBMember 2000-01-01 2000-12-31 0000036966 fhn:FirstHorizonBankMember us-gaap:NoncumulativePreferredStockMember 2005-12-31 0000036966 fhn:FhnMember us-gaap:SeriesAPreferredStockMember 2013-01-31 2013-01-31 0000036966 fhn:FTRealEstateSecuritiesCompanyInc.Member us-gaap:PreferredClassBMember 2000-12-31 0000036966 fhn:FirstHorizonBankMember us-gaap:PreferredClassAMember 2018-12-31 0000036966 fhn:FirstHorizonBankMember 2018-12-31 0000036966 fhn:FirstHorizonBankMember 2019-12-31 0000036966 fhn:FhnMember 2018-12-31 0000036966 fhn:FhnMember 2019-12-31 0000036966 fhn:FHNFinancialSecuritiesCorp.Member 2019-12-31 0000036966 fhn:FirstHorizonBankMember us-gaap:SubsequentEventMember 2020-01-01 0000036966 fhn:FirstHorizonBankMember srt:MinimumMember 2019-12-31 0000036966 fhn:FirstHorizonBankMember srt:MinimumMember 2018-12-31 0000036966 fhn:AllAffiliatesMemberMember 2019-12-31 0000036966 us-gaap:SubsequentEventMember 2020-01-01 2020-01-31 0000036966 fhn:FirstHorizonAdvisorsInc.Member 2019-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2017-01-01 2017-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2019-01-01 2019-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2018-01-01 2018-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2018-01-01 2018-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2017-01-01 2017-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember 2019-01-01 2019-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2019-01-01 2019-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-01-01 2017-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember 2018-01-01 2018-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember 2017-01-01 2017-12-31 0000036966 us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2017-01-01 2017-12-31 0000036966 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2019-12-31 0000036966 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2017-01-01 2017-12-31 0000036966 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2019-01-01 2019-12-31 0000036966 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2017-12-31 0000036966 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2016-12-31 0000036966 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2019-12-31 0000036966 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2018-12-31 0000036966 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2019-01-01 2019-12-31 0000036966 fhn:AccountingStandardsUpdate201601and201712Member us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2017-12-31 0000036966 us-gaap:AccountingStandardsUpdate201802Member us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2017-12-31 0000036966 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2018-01-01 2018-12-31 0000036966 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2018-12-31 0000036966 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-12-31 0000036966 fhn:AccountingStandardsUpdate201601and201712Member us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2017-12-31 0000036966 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2018-01-01 2018-12-31 0000036966 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2016-12-31 0000036966 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-01-01 2018-12-31 0000036966 us-gaap:AccountingStandardsUpdate201802Member us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-12-31 0000036966 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-01-01 2017-12-31 0000036966 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2019-12-31 0000036966 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2019-01-01 2019-12-31 0000036966 us-gaap:AccountingStandardsUpdate201802Member us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2017-12-31 0000036966 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2017-12-31 0000036966 fhn:AccountingStandardsUpdate201601and201712Member us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-12-31 0000036966 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2016-12-31 0000036966 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-12-31 0000036966 us-gaap:StateAndLocalJurisdictionMember fhn:Expiring20192023Member 2019-12-31 0000036966 us-gaap:StateAndLocalJurisdictionMember fhn:Expiring20242035Member 2019-12-31 0000036966 us-gaap:DomesticCountryMember fhn:Expiring20282033Member 2019-12-31 0000036966 us-gaap:StateAndLocalJurisdictionMember 2019-12-31 0000036966 us-gaap:DomesticCountryMember 2019-12-31 0000036966 us-gaap:EmployeeStockOptionMember 2018-01-01 2018-12-31 0000036966 us-gaap:EmployeeStockOptionMember 2017-01-01 2017-12-31 0000036966 fhn:OtherEquityAwardsMember 2017-01-01 2017-12-31 0000036966 fhn:OtherEquityAwardsMember 2018-01-01 2018-12-31 0000036966 fhn:OtherEquityAwardsMember 2019-01-01 2019-12-31 0000036966 us-gaap:EmployeeStockOptionMember 2019-01-01 2019-12-31 0000036966 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-01-01 2019-12-31 0000036966 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-01-01 2018-12-31 0000036966 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2017-01-01 2017-12-31 0000036966 us-gaap:PensionPlansDefinedBenefitMember 2019-01-01 2019-12-31 0000036966 us-gaap:PensionPlansDefinedBenefitMember 2017-01-01 2017-12-31 0000036966 us-gaap:PensionPlansDefinedBenefitMember 2018-01-01 2018-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CorporateMunicipalandForeignBondsMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CorporateMunicipalandForeignBondsMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:USTreasurySecuritiesMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CorporateMunicipalandForeignBondsMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CorporateMunicipalandForeignBondsMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CorporateMunicipalandForeignBondsMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CorporateMunicipalandForeignBondsMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CorporateMunicipalandForeignBondsMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CorporateMunicipalandForeignBondsMember us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FairValueInputsLevel3Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:USTreasurySecuritiesMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueInputsLevel1Member us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:PensionPlansDefinedBenefitMember 2017-12-31 0000036966 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2017-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:EquityFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:EquityFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:EquityFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:EquityFundsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:OtherNonqualifiedPensionMember 2018-01-01 2018-12-31 0000036966 us-gaap:NonqualifiedPlanMember 2017-01-01 2017-12-31 0000036966 us-gaap:QualifiedPlanMember 2018-12-31 0000036966 fhn:PostretirementBenefitPostJanuaryOneNineteenNinetyThreeMember 2018-01-01 2018-12-31 0000036966 us-gaap:QualifiedPlanMember 2017-12-31 0000036966 fhn:OtherNonqualifiedPensionMember 2019-01-01 2019-12-31 0000036966 fhn:QualifiedPensionPostRetirementBenefitsMember 2018-01-01 2018-12-31 0000036966 us-gaap:QualifiedPlanMember 2019-12-31 0000036966 fhn:PostretirementBenefitPriorToJanuaryOneNineteenNinetyThreeMember 2018-01-01 2018-12-31 0000036966 fhn:OtherNonqualifiedPensionMember 2018-12-31 0000036966 fhn:PostretirementBenefitPriorToJanuaryOneNineteenNinetyThreeMember 2019-01-01 2019-12-31 0000036966 us-gaap:QualifiedPlanMember 2019-01-01 2019-12-31 0000036966 fhn:OtherNonqualifiedPensionMember 2017-12-31 0000036966 us-gaap:NonqualifiedPlanMember 2017-12-31 0000036966 fhn:QualifiedPensionPostRetirementBenefitsMember 2017-01-01 2017-12-31 0000036966 us-gaap:QualifiedPlanMember 2017-01-01 2017-12-31 0000036966 us-gaap:NonqualifiedPlanMember 2018-01-01 2018-12-31 0000036966 us-gaap:QualifiedPlanMember 2018-01-01 2018-12-31 0000036966 us-gaap:NonqualifiedPlanMember 2019-01-01 2019-12-31 0000036966 fhn:PostretirementBenefitPriorToJanuaryOneNineteenNinetyThreeMember 2017-01-01 2017-12-31 0000036966 us-gaap:NonqualifiedPlanMember 2019-12-31 0000036966 fhn:PostretirementBenefitPostJanuaryOneNineteenNinetyThreeMember 2019-01-01 2019-12-31 0000036966 us-gaap:NonqualifiedPlanMember 2018-12-31 0000036966 fhn:OtherNonqualifiedPensionMember 2017-01-01 2017-12-31 0000036966 fhn:PostretirementBenefitPostJanuaryOneNineteenNinetyThreeMember 2017-01-01 2017-12-31 0000036966 fhn:OtherNonqualifiedPensionMember 2019-12-31 0000036966 fhn:QualifiedPensionPostRetirementBenefitsMember 2019-01-01 2019-12-31 0000036966 us-gaap:QualifiedPlanMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:CapitalBankFinancialCorpMember us-gaap:QualifiedPlanMember us-gaap:PensionPlansDefinedBenefitMember 2017-11-30 0000036966 fhn:CapitalBankFinancialCorpMember us-gaap:QualifiedPlanMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CapitalBankFinancialCorpMember us-gaap:QualifiedPlanMember us-gaap:PensionPlansDefinedBenefitMember 2019-07-01 2019-09-30 0000036966 fhn:SavingsPlanMember 2019-01-01 2019-12-31 0000036966 us-gaap:QualifiedPlanMember us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0000036966 srt:MaximumMember fhn:QualifiedPensionPostRetirementBenefitsMember 2019-01-01 2019-12-31 0000036966 fhn:FlexibleBenefitsContributionMember 2017-01-01 2017-12-31 0000036966 us-gaap:NonqualifiedPlanMember us-gaap:PensionPlansDefinedBenefitMember 2019-01-01 2019-12-31 0000036966 us-gaap:NonqualifiedPlanMember us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0000036966 fhn:QualifiedPensionPostRetirementBenefitsMember 2019-12-31 0000036966 fhn:PostretirementBenefitPriorToJanuaryOneNineteenNinetyThreeMember 2019-12-31 0000036966 fhn:FlexibleBenefitsContributionMember 2018-01-01 2018-12-31 0000036966 fhn:FlexibleBenefitsContributionMember 2019-01-01 2019-12-31 0000036966 us-gaap:QualifiedPlanMember us-gaap:PensionPlansDefinedBenefitMember 2019-01-01 2019-12-31 0000036966 fhn:PostretirementBenefitPostJanuaryOneNineteenNinetyThreeMember 2019-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:EquityFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:EquityFundsMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:EquityFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FixedIncomeFundsMember us-gaap:FairValueInputsLevel3Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 fhn:CashEquivalentsAndMoneyMarketFundsMember us-gaap:FairValueInputsLevel1Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:EquityFundsMember us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 us-gaap:FairValueInputsLevel2Member us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0000036966 srt:MinimumMember fhn:QualifiedPensionPostRetirementBenefitsMember 2019-01-01 2019-12-31 0000036966 srt:MinimumMember us-gaap:PostretirementBenefitCostsMember 2018-01-01 2018-12-31 0000036966 srt:MaximumMember us-gaap:PostretirementBenefitCostsMember 2017-01-01 2017-12-31 0000036966 srt:MinimumMember us-gaap:PostretirementBenefitCostsMember 2019-12-31 0000036966 srt:MinimumMember us-gaap:PostretirementBenefitCostsMember 2018-12-31 0000036966 srt:MinimumMember us-gaap:PostretirementBenefitCostsMember 2019-01-01 2019-12-31 0000036966 srt:MaximumMember us-gaap:PostretirementBenefitCostsMember 2019-01-01 2019-12-31 0000036966 srt:MinimumMember us-gaap:PostretirementBenefitCostsMember 2017-01-01 2017-12-31 0000036966 srt:MaximumMember us-gaap:PostretirementBenefitCostsMember 2017-12-31 0000036966 srt:MaximumMember us-gaap:PostretirementBenefitCostsMember 2018-12-31 0000036966 srt:MaximumMember us-gaap:PostretirementBenefitCostsMember 2019-12-31 0000036966 srt:MaximumMember us-gaap:PostretirementBenefitCostsMember 2018-01-01 2018-12-31 0000036966 srt:MinimumMember us-gaap:PostretirementBenefitCostsMember 2017-12-31 0000036966 fhn:NonvestedRestrictedStockPlansMember 2019-12-31 0000036966 us-gaap:StockAppreciationRightsSARSMember 2019-01-01 2019-12-31 0000036966 fhn:PerformanceConditionAwardsMember 2018-01-01 2018-12-31 0000036966 us-gaap:EmployeeStockOptionMember 2019-01-01 2019-12-31 0000036966 fhn:NonvestedRestrictedStockPlansMember 2019-01-01 2019-12-31 0000036966 us-gaap:EmployeeStockOptionMember fhn:CapitalBankFinancialCorpMember 2019-01-01 2019-12-31 0000036966 fhn:PerformanceConditionAwardsMember 2017-01-01 2017-12-31 0000036966 fhn:PsusGrantedAfterTwoThousandFourteenMember fhn:PerformanceConditionAwardsMember 2019-01-01 2019-12-31 0000036966 fhn:NonvestedRestrictedStockPlansMember 2017-01-01 2017-12-31 0000036966 fhn:EquityCompensationPlansMember 2019-12-31 0000036966 srt:MinimumMember fhn:DividendReinvestmentPlanMember 2019-01-01 2019-12-31 0000036966 fhn:NonvestedRestrictedStockPlansMember 2018-01-01 2018-12-31 0000036966 fhn:OptionsGrantedSince2008Member us-gaap:EmployeeStockOptionMember 2019-01-01 2019-12-31 0000036966 us-gaap:EmployeeStockOptionMember 2019-12-31 0000036966 srt:MaximumMember fhn:DividendReinvestmentPlanMember 2019-01-01 2019-12-31 0000036966 fhn:PsusGrantedAfterTwoThousandFourteenMember fhn:PerformanceConditionAwardsMember 2019-12-31 0000036966 srt:MinimumMember fhn:MarketConditionAwardMember 2019-01-01 2019-12-31 0000036966 us-gaap:EmployeeStockOptionMember 2017-01-01 2017-12-31 0000036966 us-gaap:EmployeeStockOptionMember 2018-01-01 2018-12-31 0000036966 fhn:PerformanceConditionAwardsMember 2019-01-01 2019-12-31 0000036966 fhn:UnitsGrantedInTwoThousandFifteenMember fhn:PerformanceConditionAwardsMember 2019-01-01 2019-12-31 0000036966 fhn:UnderwritingPortfolioAdvisoryandOtherNoninterestIncomeMember 2019-01-01 2019-12-31 0000036966 us-gaap:CorporateMember 2017-01-01 2017-12-31 0000036966 fhn:NonStrategicMember 2018-01-01 2018-12-31 0000036966 fhn:NonStrategicMember 2019-01-01 2019-12-31 0000036966 fhn:UnderwritingPortfolioAdvisoryandOtherNoninterestIncomeMember 2018-01-01 2018-12-31 0000036966 2019-01-01 2019-09-30 0000036966 fhn:NonStrategicMember 2017-01-01 2017-12-31 0000036966 us-gaap:CorporateMember 2019-01-01 2019-12-31 0000036966 us-gaap:CorporateMember 2018-01-01 2018-12-31 0000036966 us-gaap:OtherAssetsMember fhn:LowIncomeHousingPartnershipsMember 2018-12-31 0000036966 fhn:OnBalanceSheetTrustPreferredSecuritizationMember 2018-12-31 0000036966 fhn:OnBalanceSheetTrustPreferredSecuritizationMember 2019-12-31 0000036966 fhn:LowIncomeHousingPartnershipsMember 2019-12-31 0000036966 fhn:HoldingsOfAgencyMortgageBackedSecuritiesMember 2019-12-31 0000036966 us-gaap:OtherAssetsMember fhn:OtherTaxCreditInvestmentsMember 2018-12-31 0000036966 fhn:CommercialLoanTroubledDebtRestructuringsMember 2018-12-31 0000036966 fhn:HoldingsOfAgencyMortgageBackedSecuritiesMember 2018-12-31 0000036966 fhn:LowIncomeHousingPartnershipsMember 2018-12-31 0000036966 us-gaap:OtherAssetsMember fhn:LowIncomeHousingPartnershipsMember 2019-12-31 0000036966 fhn:CommercialLoanTroubledDebtRestructuringsMember 2019-12-31 0000036966 fhn:OnBalanceSheetConsumerLoanSecuritizationsMember 2019-12-31 0000036966 fhn:RabbiTrustsUsedForDeferredCompensationPlansMember 2018-12-31 0000036966 fhn:OnBalanceSheetConsumerLoanSecuritizationsMember 2018-12-31 0000036966 fhn:RabbiTrustsUsedForDeferredCompensationPlansMember 2019-12-31 0000036966 fhn:ProprietaryAgencyResidentialMortgageSecuritizationsMember 2019-12-31 0000036966 fhn:OtherTaxCreditInvestmentsMember 2019-12-31 0000036966 fhn:SaleLeasebackTransactionMember 2019-12-31 0000036966 fhn:SmallIssuerTrustPreferredHoldingsMember 2019-12-31 0000036966 fhn:ProprietaryTrustPreferredIssuancesMember 2019-12-31 0000036966 fhn:ProprietaryAgencyResidentialMortgageSecuritizationsMember 2018-12-31 0000036966 fhn:SmallIssuerTrustPreferredHoldingsMember 2018-12-31 0000036966 fhn:OtherTaxCreditInvestmentsMember 2018-12-31 0000036966 fhn:SaleLeasebackTransactionMember 2018-12-31