SEGMENT INFORMATION (Details - Continuing operations by reportable segment) $ in Millions	3 Months Ended
Mar. 31, 2016 USD ($) segment	Mar. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	2
Total Revenues	$ 11,779	$ 15,975
Revenues and pre-tax income	(214)	3,776
Operating segments \| Property Casualty \| Commercial Insurance
Segment Reporting Information [Line Items]
Total Revenues	5,278	5,956
Revenues and pre-tax income	720	1,170
Operating segments \| Mortgage Guaranty \| Commercial Insurance
Segment Reporting Information [Line Items]
Total Revenues	261	264
Revenues and pre-tax income	163	145
Operating segments \| Institutional Markets \| Commercial Insurance
Segment Reporting Information [Line Items]
Total Revenues	619	624
Revenues and pre-tax income	6	147
Operating segments \| Retirement \| Consumer Insurance
Segment Reporting Information [Line Items]
Total Revenues	2,114	2,388
Revenues and pre-tax income	461	800
Operating segments \| Life \| Consumer Insurance
Segment Reporting Information [Line Items]
Total Revenues	1,597	1,613
Revenues and pre-tax income	105	171
Operating segments \| Personal Insurance \| Consumer Insurance
Segment Reporting Information [Line Items]
Total Revenues	2,821	2,862
Revenues and pre-tax income	222	(26)
Reportable Segments \| Commercial Insurance
Segment Reporting Information [Line Items]
Total Revenues	6,158	6,844
Revenues and pre-tax income	889	1,462
Reportable Segments \| Consumer Insurance
Segment Reporting Information [Line Items]
Total Revenues	6,532	6,863
Revenues and pre-tax income	788	945
Corporate and Other
Segment Reporting Information [Line Items]
Total Revenues	206	1,042
Revenues and pre-tax income	(733)	162
Consolidation and Eliminations
Segment Reporting Information [Line Items]
Total Revenues	(159)	(159)
Revenues and pre-tax income	10	(42)
Total Operating Segments, Corporate and Other, And Consolidation and Elimination
Segment Reporting Information [Line Items]
Total Revenues	12,737	14,590
Revenues and pre-tax income	$ 954	$ 2,527

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51673353&loc=d3e41242-110953

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 10
-Article 5

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_ReportableSubsegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=aig_AIGPropertyCasualtyOperatingSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsegmentsAxis=aig_CommercialInsuranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=aig_MortgageGuarantyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=aig_InstitutionalMarketsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=aig_RetirementRetailInstitutionalInsuranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsegmentsAxis=aig_ConsumerInsuranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=aig_LifeOperatingSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=aig_PersonalInsuranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_CorporateAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConsolidationItemsAxis=aig_OperatingsegmentscorporateandothereliminationsmemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: