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Cover - USD ($)
 12 Months Ended
Dec. 31, 2024
Mar. 28, 2025
Jun. 30, 2024
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --12-31    
Document Period End Date Dec. 31, 2024    
Document Transition Report false    
Entity File Number 001-31911    
Entity Registrant Name American National Group Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 42-1447959    
Entity Address, Address Line One One Moody Plaza    
Entity Address, City or Town Galveston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77550    
City Area Code 888    
Local Phone Number 221-1234    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   10,000  
Entity Central Index Key 0001039828    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Public Float     $ 0
Series B Preferred Stock      
Document Information [Line Items]      
Title of 12(b) Security Depositary Shares, each representing a 1/1,000th interest in a share of 6.625% Fixed-Rate Reset Non-Cumulative Preferred Stock, Series B    
Trading Symbol ANGpB    
Security Exchange Name NYSE    
Series D Preferred Stock      
Document Information [Line Items]      
Title of 12(b) Security Depositary Shares, each representing a 1/1,000th interest in a share of 7.375% Fixed-Rate Non-Cumulative Preferred Stock, Series D    
Trading Symbol ANGpD    
Security Exchange Name NYSE