XML 70 R59.htm IDEA: XBRL DOCUMENT
v3.25.3

LOANS AND LEASES - Schedule of Age Analysis of Past Due Loans (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | $ 34,957 | [1] | $ 33,939 | [1] | $ 33,717
90 Days Past Due and Still Accruing | 13 |  | 14 |  |
Non-accrual loans | 125 |  | 159 |  |
Non-accrual with No ACL | 34 |  | 43 |  |
30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 89 |  | 108 |  |
Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 227 |  | 281 |  |
Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 34,730 |  | 33,658 |  |
Total commercial loans and leases |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 21,140 |  | 21,164 |  |
90 Days Past Due and Still Accruing | 0 |  | 0 |  |
Non-accrual loans | 108 |  | 144 |  |
Non-accrual with No ACL | 32 |  | 43 |  |
Total commercial loans and leases | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 23 |  | 38 |  |
Total commercial loans and leases | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 131 |  | 182 |  |
Total commercial loans and leases | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 21,009 |  | 20,982 |  |
Total commercial loans and leases | Commercial real estate |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 12,568 |  | 12,705 |  |
90 Days Past Due and Still Accruing | 0 |  | 0 |  |
Non-accrual loans | 59 |  | 88 |  |
Non-accrual with No ACL | 13 |  | 24 |  |
Total commercial loans and leases | Commercial real estate | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 10 |  | 26 |  |
Total commercial loans and leases | Commercial real estate | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 69 |  | 114 |  |
Total commercial loans and leases | Commercial real estate | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 12,499 |  | 12,591 |  |
Total commercial loans and leases | Commercial and industrial |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 7,590 |  | 7,550 |  |
90 Days Past Due and Still Accruing | 0 |  | 0 |  |
Non-accrual loans | 44 |  | 52 |  |
Non-accrual with No ACL | 19 |  | 19 |  |
Total commercial loans and leases | Commercial and industrial | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 10 |  | 10 |  |
Total commercial loans and leases | Commercial and industrial | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 54 |  | 62 |  |
Total commercial loans and leases | Commercial and industrial | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 7,536 |  | 7,488 |  |
Total commercial loans and leases | Commercial leases |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 829 |  | 765 |  |
90 Days Past Due and Still Accruing | 0 |  | 0 |  |
Non-accrual loans | 3 |  | 2 |  |
Non-accrual with No ACL | 0 |  | 0 |  |
Total commercial loans and leases | Commercial leases | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 2 |  | 1 |  |
Total commercial loans and leases | Commercial leases | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 5 |  | 3 |  |
Total commercial loans and leases | Commercial leases | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 824 |  | 762 |  |
Total commercial loans and leases | Other |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 153 |  | 144 |  |
90 Days Past Due and Still Accruing | 0 |  | 0 |  |
Non-accrual loans | 2 |  | 2 |  |
Non-accrual with No ACL | 0 |  | 0 |  |
Total commercial loans and leases | Other | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 1 |  | 1 |  |
Total commercial loans and leases | Other | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 3 |  | 3 |  |
Total commercial loans and leases | Other | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 150 |  | 141 |  |
Total consumer loans |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 13,817 |  | 12,775 |  |
90 Days Past Due and Still Accruing | 13 |  | 14 |  |
Non-accrual loans | 17 |  | 15 |  |
Non-accrual with No ACL | 2 |  | 0 |  |
Total consumer loans | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 66 |  | 70 |  |
Total consumer loans | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 96 |  | 99 |  |
Total consumer loans | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 13,721 |  | 12,676 |  |
Total consumer loans | Direct installment |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 2,678 |  | 2,676 |  |
90 Days Past Due and Still Accruing | 1 |  | 2 |  |
Non-accrual loans | 3 |  | 2 |  |
Non-accrual with No ACL | 0 |  | 0 |  |
Total consumer loans | Direct installment | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 7 |  | 8 |  |
Total consumer loans | Direct installment | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 11 |  | 12 |  |
Total consumer loans | Direct installment | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 2,667 |  | 2,664 |  |
Total consumer loans | Residential mortgages |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 8,888 |  | 7,986 |  |
90 Days Past Due and Still Accruing | 10 |  | 9 |  |
Non-accrual loans | 9 |  | 7 |  |
Non-accrual with No ACL | 2 |  | 0 |  |
Total consumer loans | Residential mortgages | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 39 |  | 38 |  |
Total consumer loans | Residential mortgages | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 58 |  | 54 |  |
Total consumer loans | Residential mortgages | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 8,830 |  | 7,932 |  |
Total consumer loans | Indirect installment |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 767 |  | 739 |  |
90 Days Past Due and Still Accruing | 1 |  | 1 |  |
Non-accrual loans | 1 |  | 2 |  |
Non-accrual with No ACL | 0 |  | 0 |  |
Total consumer loans | Indirect installment | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 12 |  | 16 |  |
Total consumer loans | Indirect installment | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 14 |  | 19 |  |
Total consumer loans | Indirect installment | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 753 |  | 720 |  |
Total consumer loans | Consumer lines of credit |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 1,484 |  | 1,374 |  |
90 Days Past Due and Still Accruing | 1 |  | 2 |  |
Non-accrual loans | 4 |  | 4 |  |
Non-accrual with No ACL | 0 |  | 0 |  |
Total consumer loans | Consumer lines of credit | 30-89 Days Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 8 |  | 8 |  |
Total consumer loans | Consumer lines of credit | Past due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | 13 |  | 14 |  |
Total consumer loans | Consumer lines of credit | Current |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Total Loans and Leases | $ 1,471 |  | $ 1,360 |  |
[1] | Amount represents loans for which we have elected the fair value option. See Note 18.

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-16 + Details
Name: | us-gaap_FinancingReceivableNonaccrualNoAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-7 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-80 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-16 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (3) -Publisher SEC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (2) -Publisher SEC Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-16 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
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/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (d)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-14 Reference 12: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (e)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 13: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (e)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 14: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (b)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 15: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 16: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 17: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-80 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=fnb_FinancialAsset30To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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