XML 121 R109.htm IDEA: XBRL DOCUMENT
v3.25.3

Future Policy Benefits - Schedule of Actual Experience and Expected Experience for Mortality and Lapses (Details) | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Actual experience | Traditional Life |  |
Liability for Future Policy Benefit, Activity |  |
Mortality | 2.40% | 1.40%
Lapses | 0.00% | 0.10%
Actual experience | Immediate annuities |  |
Liability for Future Policy Benefit, Activity |  |
Mortality | 3.00% | 2.70%
Lapses | 0.00% | 0.00%
Actual experience | PRT |  |
Liability for Future Policy Benefit, Activity |  |
Mortality | 2.80% | 2.70%
Lapses | 0.00% | 0.00%
Expected experience | Traditional Life |  |
Liability for Future Policy Benefit, Activity |  |
Mortality | 1.60% | 1.50%
Lapses | 0.60% | 0.50%
Expected experience | Immediate annuities |  |
Liability for Future Policy Benefit, Activity |  |
Mortality | 1.70% | 1.90%
Lapses | 0.00% | 0.00%
Expected experience | PRT |  |
Liability for Future Policy Benefit, Activity |  |
Mortality | 2.50% | 2.50%
Lapses | 0.00% | 0.00%

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 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(6) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(5) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480016/944-40-65-2 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-29E Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 + Details
Name: | us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Anticipated rate of future terminations of contracts in force as of the balance sheet date, which is included in determining the amount of the specified guaranteed benefit obligation as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 944 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479808/944-20-55-15 + Details
Name: | us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLapseRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Actuarially determined death rate of policyholders, which is included in determining the amount of the specified guaranteed benefit obligation as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 944 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479808/944-20-55-15 + Details
Name: | us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | fnf_LongDurationContractsAssumptionsAxis=fnf_LongDurationContractsAssumptionsActualExperienceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=fnf_TraditionalLifeInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=fnf_ImmediateAnnuityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=fnf_PensionRiskTransfersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fnf_LongDurationContractsAssumptionsAxis=fnf_LongDurationContractsAssumptionsExpectedExperienceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |