Lending Activities - Rollforward of the changes in the allowance for credit losses on Mortgage and other loans receivable (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Changes in the allowance for losses on Mortgage and other loans receivable
Allowance, beginning of period	$ 38,351	$ 629	$ 814
Loans charged off			(2)
Net charge-offs			(2)
Addition to (release of) allowance for loan losses			(164)
Divestitures	0	0	(19)
Allowance, end of period	38,473	38,351	629
Loans modified in a troubled debt restructuring		219
Commercial mortgage loans
Changes in the allowance for losses on Mortgage and other loans receivable
Allowance, beginning of period	640	545	685
Loans charged off	(109)	(17)	(2)
Net charge-offs	(109)	(17)	(2)
Addition to (release of) allowance for loan losses	221	112	(138)
Divestitures	0	0	0
Allowance, end of period	752	640	545
Off-balance-sheet commitments	67	69	71
Other loans
Changes in the allowance for losses on Mortgage and other loans receivable
Allowance, beginning of period	76	84	129
Loans charged off	0	0	0
Net charge-offs	0	0	0
Addition to (release of) allowance for loan losses	10	(8)	(26)
Divestitures	0	0	(19)
Allowance, end of period	86	76	84
Excluding AIGFP Operating
Changes in the allowance for losses on Mortgage and other loans receivable
Allowance, beginning of period	716	629
Loans charged off	(109)	(17)
Net charge-offs	(109)	(17)
Addition to (release of) allowance for loan losses	231	104
Allowance, end of period	$ 838	$ 716	$ 629

Financing Receivable, Excluding Accrued Interest, Allowance for Loan And Lease Losses Discontinued Operations

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount excluding accrued interest, of allowance for credit loss on 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

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
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-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6

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-Topic 326
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of decrease (increase) in allowance for credit loss on financing receivable from writeoff (recovery). Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
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-Publisher FASB
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- Definition

Accumulated amortized cost of financing receivable modified for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
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- Definition

Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-2

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