Investments - Components of Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net Investment Income [Line Items]
Total investment income	$ 1,027	$ 890	$ 2,059	$ 1,781
Investment expenses	37	53	90	100
Net investment income	990	837	1,969	1,681
Change in fair value of equity method investment	59	41	147	62
Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	994	865	1,987	1,704
Investment expenses	37	53	90	100
Net investment income	957	812	1,897	1,604
Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	33	25	72	77
Investment expenses	0	0	0	0
Net investment income	33	25	72	77
Corebridge Financial Inc
Net Investment Income [Line Items]
Dividend income	68		68
Change in fair value of equity method investment	65		65
Available for sale fixed maturity securities, including short-term investments
Net Investment Income [Line Items]
Total investment income	743	738	1,530	1,404
Available for sale fixed maturity securities, including short-term investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	723	714	1,488	1,354
Available for sale fixed maturity securities, including short-term investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	20	24	42	50
Other fixed maturity securities
Net Investment Income [Line Items]
Total investment income	5	(11)	7	9
Other fixed maturity securities | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	1	(1)	(4)	2
Other fixed maturity securities | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	4	(10)	11	7
Equity securities
Net Investment Income [Line Items]
Total investment income	(4)	41	84	62
Equity securities | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	(4)	41	84	62
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	73	82	150	157
Interest on mortgage and other loans | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	65	73	133	139
Interest on mortgage and other loans | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	8	9	17	18
Alternative investments
Net Investment Income [Line Items]
Total investment income	32	44	86	139
Alternative investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	32	44	87	139
Alternative investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	0	0	(1)	0
Other investments
Net Investment Income [Line Items]
Total investment income	178	(4)	202	10
Other investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	177	(6)	199	8
Other investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	$ 1	$ 2	$ 3	$ 2