XML 85 R63.htm IDEA: XBRL DOCUMENT
v3.22.4

Debt Securities (Composition of Debt Securities Portfolio by Credit Rating Agencies) (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 8,170 | $ 9,362
U.S. Treasury bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | 303 | 123
Municipal bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | 1,479 | 1,649
Foreign government bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | 194 | 227
Governmental agency bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | 229 | 177
Governmental agency mortgage-backed securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | 4,601 | 5,607
U.S. corporate debt securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | 921 | 1,081
Foreign corporate debt securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | 443 | $ 498
Investment Grade | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 7,377 |
Percentage of debt securities by credit rating agencies | 90.30% |
Investment Grade | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 622 |
Percentage of debt securities by credit rating agencies | 7.60% |
Investment Grade | U.S. Treasury bonds | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 303 |
Percentage of debt securities by credit rating agencies | 100.00% |
Investment Grade | U.S. Treasury bonds | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 0 |
Percentage of debt securities by credit rating agencies | 0.00% |
Investment Grade | Municipal bonds | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 1,432 |
Percentage of debt securities by credit rating agencies | 96.80% |
Investment Grade | Municipal bonds | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 47 |
Percentage of debt securities by credit rating agencies | 3.20% |
Investment Grade | Foreign government bonds | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 190 |
Percentage of debt securities by credit rating agencies | 98.00% |
Investment Grade | Foreign government bonds | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 2 |
Percentage of debt securities by credit rating agencies | 1.00% |
Investment Grade | Governmental agency bonds | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 229 |
Percentage of debt securities by credit rating agencies | 100.00% |
Investment Grade | Governmental agency bonds | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 0 |
Percentage of debt securities by credit rating agencies | 0.00% |
Investment Grade | Governmental agency mortgage-backed securities | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 4,601 |
Percentage of debt securities by credit rating agencies | 100.00% |
Investment Grade | Governmental agency mortgage-backed securities | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 0 |
Percentage of debt securities by credit rating agencies | 0.00% |
Investment Grade | U.S. corporate debt securities | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 429 |
Percentage of debt securities by credit rating agencies | 46.60% |
Investment Grade | U.S. corporate debt securities | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 362 |
Percentage of debt securities by credit rating agencies | 39.30% |
Investment Grade | Foreign corporate debt securities | A- or higher |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 193 |
Percentage of debt securities by credit rating agencies | 43.60% |
Investment Grade | Foreign corporate debt securities | BBB+ to BBB- |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 211 |
Percentage of debt securities by credit rating agencies | 47.60% |
Non-Investment Grade |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 171 |
Percentage of debt securities by credit rating agencies | 2.10% |
Non-Investment Grade | U.S. Treasury bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 0 |
Percentage of debt securities by credit rating agencies | 0.00% |
Non-Investment Grade | Municipal bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 0 |
Percentage of debt securities by credit rating agencies | 0.00% |
Non-Investment Grade | Foreign government bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 2 |
Percentage of debt securities by credit rating agencies | 1.00% |
Non-Investment Grade | Governmental agency bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 0 |
Percentage of debt securities by credit rating agencies | 0.00% |
Non-Investment Grade | Governmental agency mortgage-backed securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 0 |
Percentage of debt securities by credit rating agencies | 0.00% |
Non-Investment Grade | U.S. corporate debt securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 130 |
Percentage of debt securities by credit rating agencies | 14.10% |
Non-Investment Grade | Foreign corporate debt securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Debt securities, Estimated fair value | $ 39 |
Percentage of debt securities by credit rating agencies | 8.80% |

X
- Definition Percentage of debt securities grade by rating agencies. + References No definition available. + Details
Name: | faf_PercentageOfDebtSecuritiesGradeByRatingAgencies
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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
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_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: |

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: |