Investments (Net Investment Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Investment Income [Line Items]
Less: Investment expenses	$ 544	$ 343	$ 1,686	$ 858
Net investment income	4,825	3,585	14,542	11,452
Securities Investment
Net Investment Income [Line Items]
Gross Investment Income, Operating	5,365	4,249	15,625	13,817
Net investment income	4,821	3,906	13,939	12,959
Fixed maturity securities AFS
Net Investment Income [Line Items]
Gross Investment Income, Operating	3,314	2,903	9,681	8,449
Equity Securities
Net Investment Income [Line Items]
Gross Investment Income, Operating	5	14	27	26
FVO Securities
Net Investment Income [Line Items]
Net investment income	(17)	(43)	81	(197)
Mortgage loans
Net Investment Income [Line Items]
Gross Investment Income, Operating	1,189	899	3,536	2,556
Policy loans
Net Investment Income [Line Items]
Gross Investment Income, Operating	120	115	358	345
Real Estate and Real Estate Joint Ventures
Net Investment Income [Line Items]
Gross Investment Income, Operating	96	284	259	991
OLPI
Net Investment Income [Line Items]
Net investment income	206	(194)	456	900
Cash, cash equivalents and short-term investments
Net Investment Income [Line Items]
Gross Investment Income, Operating	268	103	733	183
Operating joint ventures
Net Investment Income [Line Items]
Gross Investment Income, Operating	4	12	36	61
Other Investments
Net Investment Income [Line Items]
Gross Investment Income, Operating	180	156	458	503
Unit-linked investments
Net Investment Income [Line Items]
Net investment income	$ 4	$ (321)	$ 603	$ (1,507)