Basis of Condensed Consolidated Financial Statements (Policies)	3 Months Ended
Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The condensed consolidated financial information included in this report has been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and Article 10 of Securities and Exchange Commission Regulation S-X. The principles for condensed interim financial information do not require the inclusion of all the information and footnotes required by GAAP for complete financial statements. Therefore, these financial statements should be read in conjunction with the First American Financial Corporation (the “Company”) Annual Report on Form 10-K for the year ended December 31, 2023. The condensed consolidated financial statements included herein are unaudited; however, in the opinion of management, they contain all normal recurring adjustments necessary for a fair statement of the consolidated results for the interim periods. All material intercompany transactions and balances have been eliminated upon consolidation. Out-of-period adjustment During the three months ended March 31, 2024, the Company identified certain uncollectible balances related to fees within its title insurance and services segment, which primarily related to reporting periods in 2023 and prior, that should have been previously written off. To correct for this error, the Company recorded an adjustment in the current quarter, which increased other operating expenses and increased accounts payable and accrued liabilities by $6.2 million.
Recently Adopted/Pending Accounting Pronouncements	Recently Adopted Accounting Pronouncements In June 2022, the Financial Accounting Standards Board (“FASB”) issued updated guidance intended to increase the comparability of financial information across reporting entities that have investments in equity securities measured at fair value that are subject to contractual restrictions preventing the sale of those securities. The updated guidance clarified that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, as a result, should not be considered in measuring fair value. In addition, new disclosures were required about the nature of the restrictions and their remaining duration. The updated guidance, which was adopted on January 1, 2024, had no impact on the Company's condensed consolidated financial statements. Pending Accounting Pronouncements In December 2023, the FASB issued updated guidance intended to enhance the transparency and decision usefulness of income tax disclosures. The updated guidance requires disclosure of specific categories and greater disaggregation of information included in the rate reconciliation and additional disclosures related to income taxes paid. The updated guidance is effective for annual reporting periods beginning after December 15, 2024. Except for the disclosure requirements, the Company does not expect the adoption of this guidance to have a material impact its condensed consolidated financial statements. In November 2023, the FASB issued updated guidance intended to improve financial reporting by requiring disclosure of incremental segment information to enable investors to develop more decision-useful financial analyses. The updated guidance improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The updated guidance is effective for annual reporting periods beginning after December 15, 2023 and for interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The amendments in this update are required to applied retrospectively to all periods presented in the financial statements. Except for the disclosure requirements, the Company does not expect the adoption of this guidance to have a material impact on its condensed consolidated financial statements. In August 2023, the FASB issued updated guidance that is intended to provide decision-useful information to investors and reduce diversity in practice in accounting for contributions made to a joint venture, upon formation, in a joint venture’s separate financial statements. The updated guidance will require joint ventures to recognize and initially measure their assets and liabilities at fair value, with certain exceptions to fair value measurement consistent with business combination guidance. The updated guidance is effective prospectively for all joint venture formations with a formation date on or after January 1, 2025, with early adoption permitted. The Company does not expect the adoption of this guidance to have a material impact on its condensed consolidated financial statements.

Basis of Condensed Consolidated Financial Statements (Policies)

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The condensed consolidated financial information included in this report has been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and Article 10 of Securities and Exchange Commission Regulation S-X. The principles for condensed interim financial information do not require the inclusion of all the information and footnotes required by GAAP for complete financial statements. Therefore, these financial statements should be read in conjunction with the First American Financial Corporation (the “Company”) Annual Report on Form 10-K for the year ended December 31, 2023. The condensed consolidated financial statements included herein are unaudited; however, in the opinion of management, they contain all normal recurring adjustments necessary for a fair statement of the consolidated results for the interim periods. All material intercompany transactions and balances have been eliminated upon consolidation.

Out-of-period adjustment

During the three months ended March 31, 2024, the Company identified certain uncollectible balances related to fees within its title insurance and services segment, which primarily related to reporting periods in 2023 and prior, that should have been previously written off. To correct for this error, the Company recorded an adjustment in the current quarter, which increased other operating expenses and increased accounts payable and accrued liabilities by $6.2 million.

Recently Adopted/Pending Accounting Pronouncements

Recently Adopted Accounting Pronouncements

In June 2022, the Financial Accounting Standards Board (“FASB”) issued updated guidance intended to increase the comparability of financial information across reporting entities that have investments in equity securities measured at fair value that are subject to contractual restrictions preventing the sale of those securities. The updated guidance clarified that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, as a result, should not be considered in measuring fair value. In addition, new disclosures were required about the nature of the restrictions and their remaining duration. The updated guidance, which was adopted on January 1, 2024, had no impact on the Company's condensed consolidated financial statements.

Pending Accounting Pronouncements

In December 2023, the FASB issued updated guidance intended to enhance the transparency and decision usefulness of income tax disclosures. The updated guidance requires disclosure of specific categories and greater disaggregation of information included in the rate reconciliation and additional disclosures related to income taxes paid. The updated guidance is effective for annual reporting periods beginning after December 15, 2024. Except for the disclosure requirements, the Company does not expect the adoption of this guidance to have a material impact its condensed consolidated financial statements.

In November 2023, the FASB issued updated guidance intended to improve financial reporting by requiring disclosure of incremental segment information to enable investors to develop more decision-useful financial analyses. The updated guidance improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The updated guidance is effective for annual reporting periods beginning after December 15, 2023 and for interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The amendments in this update are required to applied retrospectively to all periods presented in the financial statements. Except for the disclosure requirements, the Company does not expect the adoption of this guidance to have a material impact on its condensed consolidated financial statements.

In August 2023, the FASB issued updated guidance that is intended to provide decision-useful information to investors and reduce diversity in practice in accounting for contributions made to a joint venture, upon formation, in a joint venture’s separate financial statements. The updated guidance will require joint ventures to recognize and initially measure their assets and liabilities at fair value, with certain exceptions to fair value measurement consistent with business combination guidance. The updated guidance is effective prospectively for all joint venture formations with a formation date on or after January 1, 2025, with early adoption permitted. The Company does not expect the adoption of this guidance to have a material impact on its condensed consolidated financial statements.