Derivative Instruments - Summary of net realized gains (losses) recorded in the consolidated statements of income (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net realized gains (losses) on derivative instruments
Net realized gains (losses) on derivative instruments	[1]	$ 1	$ (15)	$ (9)	$ 41
Not designated as hedging instrument
Net realized gains (losses) on derivative instruments
Net realized gains (losses) on derivative instruments		1	(15)	(9)	41
Not designated as hedging instrument | Futures contracts
Net realized gains (losses) on derivative instruments
Net realized gains (losses) on derivative instruments		(3)	(25)	(17)	14
Not designated as hedging instrument | Foreign currency forward contracts
Net realized gains (losses) on derivative instruments
Net realized gains (losses) on derivative instruments		2	15	1	24
Not designated as hedging instrument | Other
Net realized gains (losses) on derivative instruments
Net realized gains (losses) on derivative instruments	[2]	$ 2	$ (5)	$ 7	$ 3

[1] See note 9 for information on the Company’s derivative instruments.

[2] Includes realized gains or losses on swaps, options and other derivatives contracts