XML 101 R68.htm IDEA: XBRL DOCUMENT
v3.22.4

Loans and Leases - Schedule Of Troubled Debt Restructurings Occurring During The Year (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) loan | Dec. 31, 2021 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 367 | 196
Pre-Modification Outstanding Recorded Investment | $ 91 | $ 66
Post-Modification Outstanding Recorded Investment | $ 85 | $ 61
Consumer | Credit card and other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 81 | 51
Pre-Modification Outstanding Recorded Investment | $ 12 | $ 0
Post-Modification Outstanding Recorded Investment | $ 12 | $ 0
C&I | Commercial | C&I |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 6 | 32
Pre-Modification Outstanding Recorded Investment | $ 30 | $ 37
Post-Modification Outstanding Recorded Investment | $ 24 | $ 34
CRE | Commercial | Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 1 | 1
Pre-Modification Outstanding Recorded Investment | $ 1 | $ 12
Post-Modification Outstanding Recorded Investment | $ 1 | $ 10
HELOC | Consumer | Consumer real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 98 | 25
Pre-Modification Outstanding Recorded Investment | $ 7 | $ 3
Post-Modification Outstanding Recorded Investment | $ 7 | $ 3
Real estate installment loans | Consumer | Consumer real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 181 | 87
Pre-Modification Outstanding Recorded Investment | $ 41 | $ 14
Post-Modification Outstanding Recorded Investment | $ 41 | $ 14

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fhn_CreditCardAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fhn_SubClassofFinancingReceivableAxis=fhn_GeneralCIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fhn_CommercialFinancialAndIndustrialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fhn_SubClassofFinancingReceivableAxis=fhn_CommercialRealEstate1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fhn_SubClassofFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fhn_ConsumerRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fhn_SubClassofFinancingReceivableAxis=fhn_REInstallmentLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |