INCOME TAXES (Details - Assessment of Deferred Tax Asset (liabilities) Valuation Allowance) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Sep. 30, 2018	Jun. 30, 2018
Non-Life Companies [Member]
Deferred Tax Assets, Liabilities [Line Items]
Deferred tax asset valuation allowance allocated to other comprehensive income	$ 0	$ 0
Life Insurance Companies [Member]
Deferred Tax Assets, Liabilities [Line Items]
Deferred tax asset valuation allowance allocated to other comprehensive income	$ 0	$ 0

Represents the portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from other comprehensive income attributable to changes in the valuation allowance for deferred tax assets in the period.

No definition available.

Name:	aig_IncomeTaxReconciliationOtherComprehensiveIncomeChangeInDeferredTaxAssetsValuationAllowance
Namespace Prefix:	aig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration