Additional percentage of fair value of hedge fund porfolio avaialble for redemption

No definition available.

Name:	aig_HedgeFundFairValueRedemptionAdditionalPercentage
Namespace Prefix:	aig_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value of hedge fund portfolio available for redemption.

+ References

No definition available.

+ Details

Name:	aig_HedgeFundFairValueRedemptionPercentage
Namespace Prefix:	aig_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent reporting 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 12
-Sentence Column A

+ Details

Name:	invest_InvestmentLineItems
Namespace Prefix:	invest_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Other investments not otherwise specified in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f,g))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_OtherInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cumulative amount of depreciation for real estate property held for investment purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(3))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_HedgeFundsEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentAxis=aig_AlternativeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_PrivateEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=aig_AffordablehousingpartnershipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentAxis=us-gaap_EquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentAxis=us-gaap_RealEstateInvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentAxis=aig_AircraftAssetInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentAxis=aig_InvestmentInAerCapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentAxis=aig_LifeSettlementContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentAxis=aig_OtherInvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

INVESTMENTS (Details - Carrying values of other invested assets) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Investment [Line Items]
Other invested assets				$ 27,345	$ 29,794
Hedge Funds
Investment [Line Items]
Hedge Fund Fair Value Redemption, Percentage			59.00%
Hedge Fund Fair Value Redemption, Additional Percentage	10.00%	24.00%
Alternative investments
Investment [Line Items]
Other invested assets				14,972	18,150
Alternative investments \| Hedge Funds
Investment [Line Items]
Other invested assets				8,300	10,900
Alternative investments \| Private equity funds
Investment [Line Items]
Other invested assets				6,000	6,500
Alternative investments \| Affordable Housing Partnerships
Investment [Line Items]
Other invested assets				633	701
Mutual Funds
Investment [Line Items]
Other invested assets				0	0
Investment real estate
Investment [Line Items]
Other invested assets				7,340	6,579
Net of accumulated depreciation on investment in real estate				579	668
Aircraft asset investments
Investment [Line Items]
Other invested assets				427	477
Investment In Aer Cap [Member]
Investment [Line Items]
Other invested assets				0	0
Investments in life settlements
Investment [Line Items]
Other invested assets				3,565	3,606
All other investments
Investment [Line Items]
Other invested assets				$ 1,041	$ 982