XML 22 R1.htm IDEA: XBRL DOCUMENT v3.22.0.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Feb. 10, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Registrant Name FIRST AMERICAN FINANCIAL CORPORATION    
Trading Symbol FAF    
Entity Central Index Key 0001472787    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Interactive Data Current Yes    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Entity Well-known Seasoned Issuer Yes    
Entity Public Float     $ 6,620,544,646
Entity Common Stock, Shares Outstanding   109,336,889  
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Small Business false    
Entity Emerging Growth Company false    
Title of 12(b) Security Common stock, $0.00001 par value    
Security Exchange Name NYSE    
Entity File Number 001-34580    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 26-1911571    
Entity Address, Address Line One 1 First American Way    
Entity Address, City or Town Santa Ana    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92707-5913    
City Area Code (714)    
Local Phone Number 250-3000    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference Portions of the registrant’s definitive proxy statement with respect to the 2022 annual meeting of the stockholders are incorporated by reference in Part III of this report.  The definitive proxy statement or an amendment to this Form 10-K will be filed no later than 120 days after the close of registrant’s fiscal year.    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Location Los Angeles, California    
Auditor Firm ID 238