Investments - Components of Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Net Investment Income [Line Items]
Total investment income	$ 1,505	$ 1,027	$ 2,648	$ 2,059
Investment expenses	39	37	77	90
Net investment income	1,466	990	2,571	1,969
Change in fair value of equity method investment	464	59	681	147
Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	1,466	994	2,569	1,987
Investment expenses	39	37	77	90
Net investment income	1,427	957	2,492	1,897
Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	39	33	79	72
Investment expenses	0	0	0	0
Net investment income	39	33	79	72
Corebridge Financial Inc
Net Investment Income [Line Items]
Dividend income	27	68	58	68
Change in fair value of equity method investment	455	65	664	65
Available for sale fixed maturity securities, including short-term investments
Net Investment Income [Line Items]
Total investment income	892	743	1,704	1,530
Available for sale fixed maturity securities, including short-term investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	876	723	1,666	1,488
Available for sale fixed maturity securities, including short-term investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	16	20	38	42
Other fixed maturity securities
Net Investment Income [Line Items]
Total investment income	16	5	27	7
Other fixed maturity securities | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	0	1	0	(4)
Other fixed maturity securities | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	16	4	27	11
Equity securities
Net Investment Income [Line Items]
Total investment income	14	(4)	23	84
Equity securities | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	14	(4)	23	84
Equity securities | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	0	0	0	0
Interest on mortgage and other loans
Net Investment Income [Line Items]
Total investment income	53	73	104	150
Interest on mortgage and other loans | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	46	65	90	133
Interest on mortgage and other loans | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	7	8	14	17
Alternative investments
Net Investment Income [Line Items]
Total investment income	48	32	91	86
Alternative investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	48	32	91	87
Alternative investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	0	0	0	(1)
Other investments
Net Investment Income [Line Items]
Total investment income	482	178	699	202
Other investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	482	177	699	199
Other investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	$ 0	$ 1	$ 0	$ 3