XML 58 R46.htm IDEA: XBRL DOCUMENT
v3.21.2

Fair Value of Financial Instruments - Quantitative Information of Unobservable Inputs Used for Level Three Fair Value Measurements of Financial Instruments on Recurring Basis (Detail) $ in Millions | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 5,103 | $ 3,267
Liabilities, fair value |  | 3,439 | 3,409
Fixed indexed annuities | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Liabilities, fair value |  | $ 3,439 | $ 3,404
Minimum | Fixed indexed annuities | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Market value of option | 0.00% | 0.00% |
Swap rates | 0.08% | 0.01% |
Mortality multiplier | 100.00% | 100.00% |
Surrender rates | 0.25% | 0.25% |
Partial withdrawals | 2.00% | 2.00% |
Non-performance spread | 0.74% | 0.30% |
Option cost | 0.05% | 0.00% |
Maximum | Fixed indexed annuities | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Market value of option | 67.65% | 28.41% |
Swap rates | 1.65% | 2.41% |
Mortality multiplier | 100.00% | 100.00% |
Surrender rates | 55.00% | 70.00% |
Partial withdrawals | 3.50% | 21.74% |
Non-performance spread | 0.74% | 0.93% |
Option cost | 16.61% | 4.97% |
Weighted Average | Fixed indexed annuities | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Market value of option | 2.25% | 2.48% |
Swap rates | 0.87% | 1.21% |
Mortality multiplier | 100.00% | 100.00% |
Surrender rates | 5.24% | 6.19% |
Partial withdrawals | 2.58% | 2.72% |
Non-performance spread | 0.74% | 0.62% |
Option cost | 2.25% | 1.81% |
Insurance Subsidiary | Minimum | Discounted cash flow | Discount rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  |  | 0.1060
Insurance Subsidiary | Maximum | Discounted cash flow | Discount rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  |  | 0.1060
Insurance Subsidiary | Weighted Average | Discounted cash flow | Discount rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  |  | 0.1060
Asset-backed securities | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 3,105 | $ 1,175
Asset-backed securities | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 139 | 175
Asset-backed securities | Minimum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 85.00% | 53.66% |
Asset-backed securities | Minimum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 0.00% | 95.55% |
Asset-backed securities | Maximum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 126.15% | 145.43% |
Asset-backed securities | Maximum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 107.25% | 107.08% |
Asset-backed securities | Weighted Average | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 103.96% | 97.03% |
Asset-backed securities | Weighted Average | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 79.87% | 103.58% |
Commercial mortgage-backed securities | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 36 | 26
Commercial mortgage-backed securities | Minimum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 131.59% | 101.04% |
Commercial mortgage-backed securities | Maximum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 131.59% | 127.33% |
Commercial mortgage-backed securities | Weighted Average | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 131.59% | 117.40% |
Corporates | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 344 | 388
Corporates | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | 13 |
Corporates | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 756 | 901
Corporates | Minimum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 75.20% | 93.33% |
Corporates | Minimum | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Debt securities |  | 0.4400 |
Corporates | Minimum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 88.42% | 86.58% |
Corporates | Maximum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 114.68% | 113.92% |
Corporates | Maximum | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Debt securities |  | 1.0000 |
Corporates | Maximum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 125.83% | 121.41% |
Corporates | Weighted Average | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 103.36% | 103.68% |
Corporates | Weighted Average | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Debt securities |  | 0.7800 |
Corporates | Weighted Average | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 109.47% | 108.34% |
Hybrids | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  |  | 4
Hybrids | Minimum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 112.06% |  |
Hybrids | Maximum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 112.06% |  |
Hybrids | Weighted Average | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 112.06% |  |
Municipals | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 43 | 43
Municipals | Minimum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 133.53% | 134.75% |
Municipals | Maximum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 133.53% | 134.75% |
Municipals | Weighted Average | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 133.53% | 134.75% |
Residential mortgage-backed securities | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 394 | 483
Residential mortgage-backed securities | Minimum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 112.58% | 0.00% |
Residential mortgage-backed securities | Maximum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 112.58% | 115.44% |
Residential mortgage-backed securities | Weighted Average | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 112.58% | 115.44% |
Foreign Governments | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 18 | $ 17
Foreign Governments | Minimum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 107.87% | 108.78% |
Foreign Governments | Maximum | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 113.80% | 116.83% |
Foreign Governments | Weighted Average | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes | 109.72% | 111.29% |
Short-Term | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 192 |
Short-Term | Minimum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes |  | 100.00% |
Short-Term | Maximum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes |  | 100.00% |
Short-Term | Weighted Average | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes |  | 100.00% |
Equity securities | Minimum | Broker-quoted | EBITDA Multiple |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 6.6 | 6.6
Equity securities | Maximum | Broker-quoted | EBITDA Multiple |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 6.6 | 6.6
Equity securities | Weighted Average | Broker-quoted | EBITDA Multiple |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 6.6 | 6.6
Equity securities | Insurance Subsidiary | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 3 |
Equity securities | Insurance Subsidiary | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | 4 | $ 3
Equity securities | Insurance Subsidiary | Income-Approach |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 3 | $ 1
Yield |  | 2.49% | 2.61%
Equity securities | Insurance Subsidiary | Black Scholes model |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 2 | $ 1
Equity securities | Insurance Subsidiary | Minimum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes |  | 44.00% |
Equity securities | Insurance Subsidiary | Minimum | Discounted cash flow | Discount rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 0.1337 |
Equity securities | Insurance Subsidiary | Minimum | Black Scholes model | Risk Free Rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 0.0050 | 0.0029
Equity securities | Insurance Subsidiary | Minimum | Black Scholes model | Strike Price |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 1.50 | 1.50
Equity securities | Insurance Subsidiary | Minimum | Black Scholes model | Volatility |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 1.5000 | 0.0100
Equity securities | Insurance Subsidiary | Minimum | Black Scholes model | Dividend Yield |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 0.0000 | 0.0000
Equity securities | Insurance Subsidiary | Maximum | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes |  | 100.00% |
Equity securities | Insurance Subsidiary | Maximum | Discounted cash flow | Discount rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 0.1337 |
Equity securities | Insurance Subsidiary | Maximum | Black Scholes model | Risk Free Rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 0.0050 | 0.0029
Equity securities | Insurance Subsidiary | Maximum | Black Scholes model | Strike Price |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 1.50 | 1.50
Equity securities | Insurance Subsidiary | Maximum | Black Scholes model | Volatility |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 1.5000 | 0.0100
Equity securities | Insurance Subsidiary | Maximum | Black Scholes model | Dividend Yield |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 0.0000 | 0.0000
Equity securities | Insurance Subsidiary | Weighted Average | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Offered quotes |  | 78.00% |
Equity securities | Insurance Subsidiary | Weighted Average | Discounted cash flow | Discount rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 0.1337 |
Equity securities | Insurance Subsidiary | Weighted Average | Black Scholes model | Risk Free Rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 0.0050 | 0.0029
Equity securities | Insurance Subsidiary | Weighted Average | Black Scholes model | Strike Price |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 1.50 | 1.50
Equity securities | Insurance Subsidiary | Weighted Average | Black Scholes model | Volatility |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 1.5000 | 0.0100
Equity securities | Insurance Subsidiary | Weighted Average | Black Scholes model | Dividend Yield |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Equity securities |  | 0.0000 | 0.0000
Other long-term investments | Third-Party Valuation |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  |  | $ 27
Market value of fund | 100.00% |  |
Other long-term investments | Black Scholes model |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 31 |
Market value of fund |  | 100.00% |
Credit linked note | Broker-quoted |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Assets, fair value |  | $ 20 | 23
Offered quotes | 100.00% | 100.00% |
Future policy benefits | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Liabilities, fair value |  |  | $ 5
Risk margin to reflect uncertainty | 0.50% |  |
Future policy benefits | Minimum | Discounted cash flow |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Non-performance spread | 0.00% |  |

X
- Definition Fair Value Input Option Cost + References No definition available. + Details
Name: | fnf_FairValueInputOptionCost
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Input, Yield + References No definition available. + Details
Name: | fnf_FairValueInputYield
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Inputs Black Scholes Model + References No definition available. + Details
Name: | fnf_FairValueInputsBlackScholesModel
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value inputs market value of option. + References No definition available. + Details
Name: | fnf_FairValueInputsMarketValueOfOption
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Inputs Mortality Multiplier + References No definition available. + Details
Name: | fnf_FairValueInputsMortalityMultiplier
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Inputs Non Performance Spread + References No definition available. + Details
Name: | fnf_FairValueInputsNonPerformanceSpread
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Inputs, Partial Withdrawals + References No definition available. + Details
Name: | fnf_FairValueInputsPartialWithdrawals
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Inputs Quoted Prices + References No definition available. + Details
Name: | fnf_FairValueInputsQuotedPrices
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Inputs Surrender Rates + References No definition available. + Details
Name: | fnf_FairValueInputsSurrenderRates
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Inputs, Treasury Rates + References No definition available. + Details
Name: | fnf_FairValueInputsTreasuryRates
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Risk Margin To Reflect Uncertainty + References No definition available. + Details
Name: | fnf_RiskMarginToReflectUncertainty
Namespace Prefix: | fnf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Value of input used to measure investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Value of input used to measure investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_EquitySecuritiesFvNiMeasurementInput
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
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 No definition available. + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fnf_FixedIndexAnnuityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_ValuationTechniqueDiscountedCashFlowMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_AffiliatedEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_MarketApproachValuationTechniqueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=fnf_ThirdPartyValuationTechniqueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fnf_HybridsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ShortTermInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=fnf_EBITDAMultipleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_IncomeApproachValuationTechniqueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=fnf_BlackScholesModelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputRiskFreeInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputSharePriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPriceVolatilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputExpectedDividendRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fnf_OtherInvestedAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fnf_CreditLinkedNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fnf_FuturePolicyBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |