XML 71 R59.htm IDEA: XBRL DOCUMENT
v3.25.3

Investments - Schedule of Commercial Mortgage Loans Segregated By Aging of Loans and Charge Offs (Details) - Commercial Mortgage - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Credit Quality Indicator Current Year [Abstract] |  |
Year one | $ 588 | $ 273
Year two | 292 | 227
Year three | 238 | 290
Year four | 291 | 1,253
Year five | 1,253 | 469
Prior | 641 | 210
Total | 3,303 | 2,722
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 588 | 273
Year two | 292 | 227
Year three | 238 | 290
Year four | 291 | 1,253
Year five | 1,253 | 469
Prior | 641 | 210
Total | 3,303 | 2,722
Current (less than 30 days past due) |  |
Credit Quality Indicator Current Year [Abstract] |  |
Year one | 588 | 273
Year two | 292 | 227
Year three | 238 | 290
Year four | 291 | 1,253
Year five | 1,253 | 469
Prior | 631 | 201
Total | 3,293 | 2,713
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 588 | 273
Year two | 292 | 227
Year three | 238 | 290
Year four | 291 | 1,253
Year five | 1,253 | 469
Prior | 631 | 201
Total | 3,293 | 2,713
30-89 days past due |  |
Credit Quality Indicator Current Year [Abstract] |  |
Year one | 0 | 0
Year two | 0 | 0
Year three | 0 | 0
Year four | 0 | 0
Year five | 0 | 0
Prior | 0 | 0
Total | 0 | 0
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 0 | 0
Year two | 0 | 0
Year three | 0 | 0
Year four | 0 | 0
Year five | 0 | 0
Prior | 0 | 0
Total | 0 | 0
90 days or more past due |  |
Credit Quality Indicator Current Year [Abstract] |  |
Year one | 0 | 0
Year two | 0 | 0
Year three | 0 | 0
Year four | 0 | 0
Year five | 0 | 0
Prior | 10 | 9
Total | 10 | 9
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 0 | 0
Year two | 0 | 0
Year three | 0 | 0
Year four | 0 | 0
Year five | 0 | 0
Prior | 10 | 9
Total | $ 10 | $ 9

X
- Definition Credit Quality Indicator Current Year + References No definition available. + Details
Name: | fnf_CreditQualityIndicatorCurrentYearAbstract
Namespace Prefix: | fnf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Credit Quality Indicator Prior Year + References No definition available. + Details
Name: | fnf_CreditQualityIndicatorPriorYearAbstract
Namespace Prefix: | fnf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year + References No definition available. + Details
Name: | fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear
Namespace Prefix: | fnf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year + References No definition available. + Details
Name: | fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear
Namespace Prefix: | fnf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year + References No definition available. + Details
Name: | fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear
Namespace Prefix: | fnf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year + References No definition available. + Details
Name: | fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear
Namespace Prefix: | fnf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year + References No definition available. + Details
Name: | fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear
Namespace Prefix: | fnf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year + References No definition available. + Details
Name: | fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear
Namespace Prefix: | fnf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables1To29DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=fnf_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: |