Basis of Condensed Consolidated Financial Statements (Policies)	3 Months Ended
Mar. 31, 2023
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, 2022. 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.
Pending Accounting Pronouncements	Pending 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 clarifies 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 are required about the nature of the restrictions and their remaining duration. The updated guidance is effective for interim and annual reporting periods beginning after December 15, 2023. The Company does not expect the adoption of this guidance to impact its condensed consolidated financial statements.

Basis of Condensed Consolidated Financial Statements (Policies)

3 Months Ended

Mar. 31, 2023

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, 2022. 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.

Pending 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 clarifies 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 are required about the nature of the restrictions and their remaining duration. The updated guidance is effective for interim and annual reporting periods beginning after December 15, 2023. The Company does not expect the adoption of this guidance to impact its condensed consolidated financial statements.