Cover Page - shares	9 Months Ended
	Sep. 30, 2023	Oct. 27, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
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
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		702,040,343
Document Fiscal Year Focus	2023
Entity Central Index Key	0000005272
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Common Stock, Par Value $2.50 Per Share
Document Information [Line Items]
Title of 12(b) Security	Common Stock, Par Value $2.50 Per Share
Trading Symbol	AIG
Security Exchange Name	NYSE
4.875% Series A-3 Junior Subordinated Debentures
Document Information [Line Items]
Title of 12(b) Security	4.875% Series A-3 Junior Subordinated Debentures
Trading Symbol	AIG 67EU
Security Exchange Name	NYSE
Depositary Shares Each Representing a 1/1,000th Interest in a Share of Series A 5.85% Non-Cumulative Perpetual Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	Depositary Shares Each Representing a 1/1,000th Interest in a Share of Series A 5.85% Non-Cumulative Perpetual Preferred Stock
Trading Symbol	AIG PRA
Security Exchange Name	NYSE