Derivatives - Schedule of Gains (Losses) Related to Derivatives Not Designated as Hedges (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	$ 536	$ (338)
Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	(995)	(1,341)
Equity options \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	(1,155)	(936)
Futures \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	(47)	(7)
Foreign currency swaps \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	436	(279)
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	(114)	(67)
Foreign currency forwards \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	46	(210)
Embedded derivatives on funds withheld \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	(161)	158
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	$ 1,531	$ 1,003