Lending Activities - Rollforward of the changes in the allowance for credit losses on Mortgage and other loans receivable (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Changes in the allowance for losses on Mortgage and other loans receivable
Allowance, beginning of period			$ 38,351
Allowance, end of period	$ 38,521		38,521
Loans modified in a troubled debt restructuring		$ 220		$ 220
Commercial mortgage loans
Changes in the allowance for losses on Mortgage and other loans receivable
Allowance, beginning of period	737	525	640	545
Loans charged off			(6)	(4)
Net charge-offs			(6)	(4)
Addition to (release of) allowance for loan losses	75	39	178	23
Allowance, end of period	812	564	812	564
Off-balance-sheet commitments	70	87	70	87	$ 69
Other loans
Changes in the allowance for losses on Mortgage and other loans receivable
Allowance, beginning of period	69	78	76	84
Loans charged off			0	0
Net charge-offs			0	0
Addition to (release of) allowance for loan losses	5	13	(2)	7
Allowance, end of period	74	91	74	91
Excluding AIGFP Operating
Changes in the allowance for losses on Mortgage and other loans receivable
Allowance, beginning of period	806	603	716	629
Loans charged off			(6)	(4)
Net charge-offs			(6)	(4)
Addition to (release of) allowance for loan losses	80	52	176	30
Allowance, end of period	$ 886	$ 655	$ 886	$ 655

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

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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
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-Name Accounting Standards Codification
-Section 45
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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
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Amount, excluding accrued interest, of decrease (increase) in allowance for credit loss on financing receivable from writeoff (recovery). Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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

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- Definition

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

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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

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