Lending Activities - Credit quality of commercial mortgages (Details) $ in Millions	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 50,321	$ 46,677
Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	6,473	2,820
Prior year	3,355	2,708
Two years prior	2,206	5,897
Three years prior	5,453	5,989
Four years prior	5,431	3,734
Five years & beyond prior	14,210	14,517
Total	$ 37,128	$ 35,665
Weighted average debt service coverage ratio	1.9	1.9
Weighted average loan-to-value ratio (as a percent)	59.00%	57.00%
AIG Financial Products
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 37,600
Less than 65% | Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	5,425	$ 2,286
Prior year	2,548	2,272
Two years prior	1,775	4,149
Three years prior	3,958	4,815
Four years prior	3,016	2,892
Five years & beyond prior	10,739	9,902
Total	27,461	26,316
65% to 75% | Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	998	372
Prior year	517	410
Two years prior	405	1,748
Three years prior	1,445	1,174
Four years prior	1,487	406
Five years & beyond prior	1,393	3,490
Total	6,245	7,600
76% to 80% | Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	50	0
Prior year	52	0
Two years prior	0	0
Three years prior	0	0
Four years prior	168	188
Five years & beyond prior	229	274
Total	499	462
Greater than 80% | Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	162
Prior year	238	26
Two years prior	26	0
Three years prior	50	0
Four years prior	760	248
Five years & beyond prior	1,849	851
Total	2,923	1,287
Greater than 1.2X | Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	5,518	2,245
Prior year	2,457	1,662
Two years prior	1,710	5,126
Three years prior	4,985	3,926
Four years prior	4,120	3,557
Five years & beyond prior	11,663	10,796
Total	30,453	27,312
1.00 - 1.20X | Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	910	574
Prior year	898	1,019
Two years prior	473	700
Three years prior	416	1,138
Four years prior	567	136
Five years & beyond prior	1,353	1,929
Total	4,617	5,496
Less than 1.00X | Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	45	1
Prior year	0	27
Two years prior	23	71
Three years prior	52	925
Four years prior	744	41
Five years & beyond prior	1,194	1,792
Total	$ 2,058	$ 2,857