Derivatives - Schedule of Gains (Losses) Related to Derivatives Not Designated as Hedges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	$ (1,911)	$ 1,390	$ 525
Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	(864)	1,564	1,968
Equity options \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	1,787	1,921	1,564
Futures \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	155	72	73
Foreign currency swaps \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	(1,421)	456	(113)
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	6	(112)	5
Foreign currency forwards \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	(1,712)	(775)	(495)
Embedded derivatives on funds withheld \| Investment related gains (losses)
Derivatives, Fair Value [Line Items]
Total gains (losses) on derivatives not designated as hedges	321	2	934
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	$ (1,047)	$ (174)	$ (1,443)