v3.22.2.2
Document and Entity Information
Dec. 01, 2022
Entity Listings [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Dec. 01, 2022
Entity File Number 1-13653
Entity Registrant Name AMERICAN FINANCIAL GROUP, INC.
Entity Central Index Key 0001042046
Entity Incorporation, State or Country Code OH
Entity Tax Identification Number 31-1544320
Entity Address, Address Line One 301 East Fourth Street
Entity Address, City or Town Cincinnati
Entity Address, State or Province OH
Entity Address, Postal Zip Code 45202
City Area Code 513
Local Phone Number 579-2121
Entity Emerging Growth Company false
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Common Stock [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Common Stock
Trading Symbol AFG
Security Exchange Name NYSE
5.875% Subordinated Debentures due March 30, 2059 [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security 5.875% Subordinated Debentures due March 30, 2059
Trading Symbol AFGB
Security Exchange Name NYSE
5.125% Subordinated Debentures due December 15, 2059 [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security 5.125% Subordinated Debentures due December 15, 2059
Trading Symbol AFGC
Security Exchange Name NYSE
5.625% Subordinated Debentures due June 1, 2060 [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security 5.625% Subordinated Debentures due June 1, 2060
Trading Symbol AFGD
Security Exchange Name NYSE
4.5% Subordinated Debentures due September 15, 2060 [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security 4.5% Subordinated Debentures due September 15, 2060
Trading Symbol AFGE
Security Exchange Name NYSE