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Investments - Schedule of Recognized Gains (Losses), net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Schedule of Investments [Line Items]
Net realized (losses) gains on fixed maturity available-for-sale securities	$ (1)	$ (32)	$ 3	$ (137)
Net realized/unrealized gains (losses) on other invested assets	3	9	73	(20)
Change in allowance for expected credit losses	0	(7)	(32)	(30)
Realized gains (losses) on certain derivative instruments	30	(30)	65	(184)
Unrealized gains (losses) on certain derivative instruments	347	(297)	450	14
Change in fair value of other derivatives and embedded derivatives	3	(3)	6	0
Realized gains (losses) on derivatives and embedded derivatives	202	(294)	335	(136)
Recognized gains and losses, net	269	(356)	456	(367)
Reinsurance related embedded derivatives
Schedule of Investments [Line Items]
Change in fair value of reinsurance related embedded derivatives	(178)	36	(186)	34
Equity securities
Schedule of Investments [Line Items]
Net realized/unrealized gains (losses) on equity securities and gains (losses) on preferred securities	48	(33)	48	(37)
Valuation gains (losses)	31	(22)	(42)	(12)
Preferred securities
Schedule of Investments [Line Items]
Net realized/unrealized gains (losses) on equity securities and gains (losses) on preferred securities	17	1	29	(7)
Valuation gains (losses)	$ 18	$ 2	$ 30	$ 52

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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