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Document and Entity Information
Sep. 23, 2024
Cover [Abstract]  
Document Type 8-K
Document Period End Date Sep. 23, 2024
Entity Registrant Name First American Financial Corp
Entity Incorporation State Country Code DE
Entity File Number 001-34580
Entity Tax Identification Number 26-1911571
Entity Address Address Line 1 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
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, $0.00001 par value
Trading Symbol FAF
Security Exchange Name NYSE
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0001472787