Segment Information - Schedule of Reconciliation of Revenues (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Total revenues	$ 168	$ (471)	$ 3,070	$ 3,279
Net gains (losses) on hedging instruments and investments	(2,487)	(2,860)	(2,204)	(1,517)
Investment income (loss) related to mark-to-market on TPG shares	727	491	1,268	1,019
Net investment income on funds withheld assets	201	227	400	454
Corporate And Reconciling Items
Segment Reporting [Line Items]
Total revenues	2,005	1,751	3,889	3,524
Segment Reconciling Items
Segment Reporting [Line Items]
Fees attributed to guarantee benefit reserves	714	764	1,485	1,532
Net gains (losses) on hedging instruments and investments	(2,773)	(3,208)	(2,653)	(2,226)
Net investment income (loss) related to noncontrolling interests	5	6	9	12
Consolidated investments	16	(11)	(2)	(17)
Net investment income on funds withheld assets	201	227	400	454
Segment Reconciling Items \| Equity securities
Segment Reporting [Line Items]
Investment income (loss) related to mark-to-market on TPG shares	$ 0	$ 0	$ (58)	$ 0

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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