Investments - Components of Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Investment Income [Line Items]
Total investment income	$ 1,018	$ 925	$ 3,077	$ 2,706
Investment expenses	45	69	135	169
Net investment income	973	856	2,942	2,537
Change in fair value of equity method investment	25	31	172	93
Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	967	896	2,954	2,600
Investment expenses	45	69	135	169
Net investment income	922	827	2,819	2,431
Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	51	29	123	106
Investment expenses	0	0	0	0
Net investment income	51	29	123	106
Corebridge Financial Inc
Net Investment Income [Line Items]
Dividend income	65		133
Change in fair value of equity method investment	(35)		30
Available for sale fixed maturity securities, including short-term investments
Net Investment Income [Line Items]
Total investment income	771	753	2,301	2,157
Available for sale fixed maturity securities, including short-term investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	746	731	2,234	2,085
Available for sale fixed maturity securities, including short-term investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	25	22	67	72
Other fixed maturity securities
Net Investment Income [Line Items]
Total investment income	20	(5)	27	4
Other fixed maturity securities | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	4	(1)	0	1
Other fixed maturity securities | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	16	(4)	27	3
Equity securities
Net Investment Income [Line Items]
Total investment income	60	31	144	93
Equity securities | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	60	31	144	93
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	61	83	211	240
Interest on mortgage and other loans | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	52	73	185	212
Interest on mortgage and other loans | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	9	10	26	28
Alternative investments
Net Investment Income [Line Items]
Total investment income	42	19	128	158
Alternative investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	42	19	129	158
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	64	44	266	54
Other investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	63	43	262	51
Other investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	$ 1	$ 1	$ 4	$ 3