Investments - Components of Net Investment Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Net Investment Income [Line Items]
Total investment income	$ 4,385	$ 4,434	$ 3,681
Investment expenses	170	179	235
Net investment income	4,215	4,255	3,446
Change in fair value of equity method investment	255	586	53
Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	4,236	4,290	3,501
Investment expenses	170	179	235
Net investment income	4,066	4,111	3,266
Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	149	144	180
Investment expenses	0	0	0
Net investment income	149	144	180
Corebridge Financial Inc
Net Investment Income [Line Items]
Dividend income	90	162
Change in fair value of equity method investment	187	439
Available for sale fixed maturity securities, including short-term investments
Net Investment Income [Line Items]
Total investment income	3,518	3,078	2,957
Available for sale fixed maturity securities, including short-term investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	3,446	2,989	2,862
Available for sale fixed maturity securities, including short-term investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	72	89	95
Other fixed maturity securities
Net Investment Income [Line Items]
Total investment income	51	19	46
Other fixed maturity securities | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	0	0	3
Other fixed maturity securities | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	51	19	43
Equity securities
Net Investment Income [Line Items]
Total investment income	82	149	53
Equity securities | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	82	149	53
Equity securities | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	0	0	0
Interest on mortgage and other loans
Net Investment Income [Line Items]
Total investment income	192	261	321
Interest on mortgage and other loans | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	167	229	283
Interest on mortgage and other loans | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	25	32	38
Alternative investments
Net Investment Income [Line Items]
Total investment income	273	196	199
Alternative investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	273	196	199
Alternative investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	0	0	0
Other investments
Net Investment Income [Line Items]
Total investment income	269	731	105
Other investments | Excluding Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	268	727	101
Other investments | Fortitude Re Funds Withheld Assets
Net Investment Income [Line Items]
Total investment income	$ 1	$ 4	$ 4