Name:	aig_DiscountingOfReservesLineItems
Namespace Prefix:	aig_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the increase (decrease) in discount of loss reserves.

No definition available.

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

Represents the increase (decrease) in discount of loss reserves due to reinsurance transaction.

No definition available.

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

Represents the increase (decrease) in discount of loss reserves attributable to current accident year loss reserve activities.

No definition available.

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

Represents the increase (decrease) in discount of loss reserves attributable to change in interest rate

No definition available.

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

Represents the increase (decrease) in discount of loss reserves attributable to prior year year loss reserve development and payout pattern

No definition available.

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

Represents the discount of loss reserves to present value for claims that won't be paid for an extended period of time.

No definition available.

Name:	aig_LossReserveDiscount
Namespace Prefix:	aig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the net change in discount of loss reserves.

No definition available.

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

Retroactive Reinsurance Discount

No definition available.

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

Current year monetary amount of the change in worker's compensation non tabular reserve liability resulting from the discount applied to reduce the reserve to present value.

No definition available.

Name:	aig_WorkersCompensationDiscountAmountNonTabular
Namespace Prefix:	aig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Current year monetary amount of the change in worker's compensation tabular reserve liability resulting from the discount applied to reduce the reserve to present value.

No definition available.

Name:	aig_WorkersCompensationDiscountAmountTabular
Namespace Prefix:	aig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

For non tabular calculations of the workers compensation reserve, the percent discount applied to worker's compensation reserve liability to reduce the reserve to present value.

No definition available.

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

For tabular calculations of the workers compensation reserve, the percent discount applied to worker's compensation reserve liability to reduce the reserve to present value.

No definition available.

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

Amount of increase (decrease) in insurance liabilities classified as other.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Name:	us-gaap_IncreaseDecreaseInOtherInsuranceLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Current year monetary amount of the change in worker's compensation reserve liability resulting from the discount applied to reduce the reserve to present value.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.(a),13(b))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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

Name:	srt_ProductOrServiceAxis=aig_NorthAmericanCommercialInsuranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_ProductOrServiceAxis=aig_LegacyPropertyAndCasualtyRunOffInsuranceLinesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_StatementGeographicalAxis=stpr_NY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_StatementGeographicalAxis=stpr_PA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	aig_LossReservesAssociatedWithAccidentYearAxis=aig_LossReservesAssociatedWithAccidentYear2001AndPriorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: