CONTINGENCIES, COMMITMENTS AND GUARANTEES (Details - Loss Contingencies) $ in Billions	Sep. 30, 2018 USD ($)
Other Commitments
Other Commitments	$ 3.6

The amount the entity has committed to invest in limited partnerships, private equities, hedge funds and mutual funds, and to purchase and develop real estate in the U.S. and abroad.

No definition available.

Name:	aig_OtherCommitmentsAmount
Namespace Prefix:	aig_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant