Indicates the number of financing receivables under each classification.

No definition available.

Name:	aig_FinancingReceivableNumberOfLoans
Namespace Prefix:	aig_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of allowance for credit loss to total financing receivable outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (1)
-Publisher SEC

+ Details

Name:	srt_FinancingReceivableAllowanceForCreditLossToOutstandingPercent
Namespace Prefix:	srt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage, before allowance for credit loss, of financing receivable to total financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (c)
-Publisher SEC

+ Details

Name:	srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent
Namespace Prefix:	srt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

+ Details

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

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-79

+ Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=aig_FinancialAssetLessThanOrEqualTo90DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=aig_FinancialAssetGreaterThan90DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_ApartmentBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_IndustrialPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_HotelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=aig_OtherFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Lending Activities - Credit quality performance indicators for commercial mortgages (Details) $ in Millions	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for credit losses	$ 38,473	$ 38,351	$ 629	$ 814
Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	612	629
Total	$ 38,009	$ 37,128
Allowance for credit losses	$ 752	$ 640	$ 545	$ 685
Percent of Total	100.00%	100.00%
Percentage of total, allowance for credit losses	2.00%	2.00%
Commercial mortgage loans \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	610	625
Total	$ 37,937	$ 36,913
Percent of Total	100.00%	99.00%
Commercial mortgage loans \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	1	0
Total	$ 29	$ 0
Percent of Total	0.00%	0.00%
Commercial mortgage loans \| >90 days delinquent or in process of foreclosure(a)
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	1	4
Total	$ 43	$ 215
Percent of Total	0.00%	1.00%
Commercial mortgage loans \| Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 15,129	$ 14,597
Allowance for credit losses	94	100
Commercial mortgage loans \| Apartments \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	15,129	14,597
Commercial mortgage loans \| Apartments \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Apartments \| >90 days delinquent or in process of foreclosure(a)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Offices
Financing Receivable, Credit Quality Indicator [Line Items]
Total	9,708	10,275
Allowance for credit losses	415	351
Commercial mortgage loans \| Offices \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	9,679	10,102
Commercial mortgage loans \| Offices \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	29	0
Commercial mortgage loans \| Offices \| >90 days delinquent or in process of foreclosure(a)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	173
Commercial mortgage loans \| Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Total	4,306	3,816
Allowance for credit losses	109	81
Commercial mortgage loans \| Retail \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	4,263	3,774
Commercial mortgage loans \| Retail \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Retail \| >90 days delinquent or in process of foreclosure(a)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	43	42
Commercial mortgage loans \| Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	6,367	6,006
Allowance for credit losses	90	71
Commercial mortgage loans \| Industrial \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	6,367	6,006
Commercial mortgage loans \| Industrial \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Industrial \| >90 days delinquent or in process of foreclosure(a)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Hotel
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,053	2,027
Allowance for credit losses	38	29
Commercial mortgage loans \| Hotel \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,053	2,027
Commercial mortgage loans \| Hotel \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Hotel \| >90 days delinquent or in process of foreclosure(a)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Others
Financing Receivable, Credit Quality Indicator [Line Items]
Total	446	407
Allowance for credit losses	6	8
Commercial mortgage loans \| Others \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	446	407
Commercial mortgage loans \| Others \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Others \| >90 days delinquent or in process of foreclosure(a)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 0	$ 0