XML 69 R54.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Loans and Leases - Performance Of Loans That Have Been Modified In The Last 12 Months (Details) $ in Millions | Mar. 31, 2024 USD ($)
--- | ---
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Non-Accruing | $ 49
Current |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 123
30-89 Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 1
90+ Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 0
Commercial: | Commercial and industrial |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Non-Accruing | 18
Commercial: | Commercial and industrial | Current |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 100
Commercial: | Commercial and industrial | 30-89 Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 1
Commercial: | Commercial and industrial | 90+ Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 0
Commercial: | Commercial real estate |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Non-Accruing | 28
Commercial: | Commercial real estate | Current |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 19
Commercial: | Commercial real estate | 30-89 Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 0
Commercial: | Commercial real estate | 90+ Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 0
Consumer: | Consumer Real Estate |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Non-Accruing | 3
Consumer: | Consumer Real Estate | Current |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 4
Consumer: | Consumer Real Estate | 30-89 Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 0
Consumer: | Consumer Real Estate | 90+ Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 0
Consumer: | Credit Card and Other |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Non-Accruing | 0
Consumer: | Credit Card and Other | Current |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 0
Consumer: | Credit Card and Other | 30-89 Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | 0
Consumer: | Credit Card and Other | 90+ Days Past Due |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Loans | $ 0

X
- Definition Financing Receivable, Excluding Accrued Interest, Non-Accruing, Modified, During Past 12 Months + References No definition available. + Details
Name: | fhn_FinancingReceivableExcludingAccruedInterestNonAccruingModifiedDuringPast12Months
Namespace Prefix: | fhn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, of financing receivable 12 months after modification for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPast12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-33 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-34 + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=fhn_FinancialAsset30To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
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: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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_ConsumerRealEstatePortfolioSegmentMember
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: |