XML 87 R65.htm IDEA: XBRL DOCUMENT
v3.22.4

Debt Securities (Composition of Debt Securities Portfolio in Unrealized Loss Position by Credit Rating Agencies) (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 7,646 | $ 5,772
Investment Grade | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 6,953 |
Percentage of debt securities in unrealized loss position | 90.90% |
Investment Grade | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 541 |
Percentage of debt securities in unrealized loss position | 7.10% |
Non-Investment Grade |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 152 |
Percentage of debt securities in unrealized loss position | 2.00% |
U.S. Treasury bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 158 | 76
U.S. Treasury bonds | Investment Grade | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 158 |
Percentage of debt securities in unrealized loss position | 100.00% |
U.S. Treasury bonds | Investment Grade | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 0 |
Percentage of debt securities in unrealized loss position | 0.00% |
U.S. Treasury bonds | Non-Investment Grade |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 0 |
Percentage of debt securities in unrealized loss position | 0.00% |
Municipal bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 1,353 | 684
Municipal bonds | Investment Grade | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 1,315 |
Percentage of debt securities in unrealized loss position | 97.20% |
Municipal bonds | Investment Grade | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 38 |
Percentage of debt securities in unrealized loss position | 2.80% |
Municipal bonds | Non-Investment Grade |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 0 |
Percentage of debt securities in unrealized loss position | 0.00% |
Foreign government bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 188 | 136
Foreign government bonds | Investment Grade | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 184 |
Percentage of debt securities in unrealized loss position | 97.90% |
Foreign government bonds | Investment Grade | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 1 |
Percentage of debt securities in unrealized loss position | 0.50% |
Foreign government bonds | Non-Investment Grade |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 3 |
Percentage of debt securities in unrealized loss position | 1.60% |
Governmental agency bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 229 | 73
Governmental agency bonds | Investment Grade | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 229 |
Percentage of debt securities in unrealized loss position | 100.00% |
Governmental agency bonds | Investment Grade | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 0 |
Percentage of debt securities in unrealized loss position | 0.00% |
Governmental agency bonds | Non-Investment Grade |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 0 |
Percentage of debt securities in unrealized loss position | 0.00% |
Governmental agency mortgage-backed securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 4,487 | 4,036
Governmental agency mortgage-backed securities | Investment Grade | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 4,487 |
Percentage of debt securities in unrealized loss position | 100.00% |
Governmental agency mortgage-backed securities | Investment Grade | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 0 |
Governmental agency mortgage-backed securities | Non-Investment Grade |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 0 |
Percentage of debt securities in unrealized loss position | 0.00% |
U.S. corporate debt securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 853 | 533
U.S. corporate debt securities | Investment Grade | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 411 |
Percentage of debt securities in unrealized loss position | 48.20% |
U.S. corporate debt securities | Investment Grade | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 327 |
Percentage of debt securities in unrealized loss position | 38.30% |
U.S. corporate debt securities | Non-Investment Grade |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 115 |
Percentage of debt securities in unrealized loss position | 13.50% |
Foreign corporate debt securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 378 | $ 234
Foreign corporate debt securities | Investment Grade | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 169 |
Percentage of debt securities in unrealized loss position | 44.70% |
Foreign corporate debt securities | Investment Grade | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 175 |
Percentage of debt securities in unrealized loss position | 46.30% |
Foreign corporate debt securities | Non-Investment Grade |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Estimated fair value of debt securities, Unrealized loss position | $ 34 |
Percentage of debt securities in unrealized loss position | 9.00% |

X
- Definition Percentage of debt securities in unrealized losses position. + References No definition available. + Details
Name: | faf_PercentageOfDebtSecuritiesInUnrealizedLossesPosition
Namespace Prefix: | faf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
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 No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ExternalCreditRatingByGroupingAxis=us-gaap_ExternalCreditRatingInvestmentGradeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | faf_ExternalCreditRatingByGradeTypeAxis=faf_AMinusOrHigherRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | faf_ExternalCreditRatingByGradeTypeAxis=faf_BBBPlusToBBBMinusMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ExternalCreditRatingByGroupingAxis=us-gaap_ExternalCreditRatingNonInvestmentGradeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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