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Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Feb. 06, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-8787    
Entity Registrant Name American International Group, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 13-2592361    
Entity Address, Address Line One 1271 Avenue of the Americas    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10020    
City Area Code (212)    
Local Phone Number 770-7000    
Title of 12(b) Security Common Stock, Par Value $2.50 Per Share    
Trading Symbol AIG    
Security Exchange Name NYSE    
Entity Well Known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 47,910
Entity Common Stock, Shares Outstanding   536,559,663  
Documents Incorporated By Reference
Portions of the registrant’s definitive proxy statement for the 2026 Annual Meeting of Shareholders are incorporated by reference into Part III of this annual report.
    
Document Fiscal Year Focus 2025    
Entity Central Index Key 0000005272    
Document Fiscal Period Focus FY    
Amendment Flag false