Derivatives - Schedule of Gains (Losses) Related to Derivatives Not Designated as Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	$ 369	$ 1,177	$ (1,433)	$ 927
Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	1,629	1,452	(289)	2,197
Equity options \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	1,627	596	1,562	2,298
Futures \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	123	26	107	152
Interest rate swaps and forwards and other swaps \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	91	(126)	(1,334)	(156)
Foreign currency forwards \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	(361)	209	(972)	(657)
Embedded derivatives on funds withheld \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	149	747	348	560
Embedded derivatives in indexed annuity products \| Embedded derivatives in indexed annuity products
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	$ (1,260)	$ (275)	$ (1,144)	$ (1,270)