Segment Information - Schedule of Reconciliation of Revenues (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Total revenues	$ 2,902	$ 3,750
Net gains (losses) on hedging instruments and investments	283	1,343
Investment income (loss) related to mark-to-market on TPG shares	541	528
Net investment income on funds withheld assets	199	227
Equity securities
Segment Reporting Information [Line Items]
Investment income (loss) related to mark-to-market on TPG shares	(58)	0
Corporate And Reconciling Items
Segment Reporting Information [Line Items]
Total revenues	1,884	1,773
Segment Reconciling Items
Segment Reporting Information [Line Items]
Fees attributed to guarantee benefit reserves	771	768
Net gains (losses) on hedging instruments and investments	120	982
Net investment income (loss) related to noncontrolling interests	4	6
Consolidated investments	(18)	(6)
Net investment income on funds withheld assets	$ 199	$ 227

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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