Name:	aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentSecondRedemptionNoticePeriod
Namespace Prefix:	aig_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Average original expected period the underlying assets are expected to be liquidated by the investees for investments for which net asset value per share is calculated.

No definition available.

Name:	aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentAverageOriginalExpectedLives
Namespace Prefix:	aig_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of years representing the first threshold of the expected remaining lives of less than three years of investments.

No definition available.

Name:	aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriodThresholdLevelOne
Namespace Prefix:	aig_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of years representing the third threshold of the expected remaining lives between seven and ten years of investments.

No definition available.

Name:	aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriodThresholdLevelThree
Namespace Prefix:	aig_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of years representing the second threshold of the expected remaining lives between three and seven years of investments.

No definition available.

Name:	aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriodThresholdLevelTwo
Namespace Prefix:	aig_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

This element represents the percentage of investment subject to annual redemption.

No definition available.

Name:	aig_PercentageOfAnnualRedemption
Namespace Prefix:	aig_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

This element represents the percentage of investment subject to monthly redemption.

No definition available.

Name:	aig_PercentageOfMonthlyRedemption
Namespace Prefix:	aig_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

This element represents the percentage of investment subject to quarterly redemption.

No definition available.

Name:	aig_PercentageOfQuarterlyRedemption
Namespace Prefix:	aig_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

This element represents the percentage of investment subject to semi-annual redemption.

No definition available.

Name:	aig_PercentageOfSemiAnnualRedemption
Namespace Prefix:	aig_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Fair value of investments in certain entities that calculate net asset value per share, including, but not limited to, by unit, membership interest, or other ownership interest. Investments include, but are not limited to, investments in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=SL6742756-110258

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

Notice period the entity is required to deliver before it can redeem an investment calculated using net asset value per share, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, investments calculated by per unit, per membership interest, other equity or ownership interest and alternative investments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=SL6742756-110258

Name:	us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentRedemptionNoticePeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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.

No definition available.

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

The percentage of the total value of investments that cannot be redeemed because of a redemption restriction as of the statement of financial position date.

No definition available.

Name:	us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareRedemptionRestrictionPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=SL6742756-110258

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

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

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriodAxis=aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriodCategoryOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriodAxis=aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriodCategoryTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriodAxis=aig_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriodCategoryThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=aig_LeveragedBuyoutMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=aig_RealEstateAndInfrastructurePrivateEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=us-gaap_VentureCapitalFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=aig_DistressedPrivateEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=aig_OtherPrivateEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=us-gaap_HedgeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=us-gaap_HedgeFundsEventDrivenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=us-gaap_HedgeFundsEquityLongShortMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=aig_HedgeFundsMacroValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=aig_DistressedHedgeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=aig_EmergingMarketsHedgeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: