Investments - Investments - Net Realized Capital Gains (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Schedule of Investments [Line Items]
Net realized losses	$ (64)	$ (338)	$ (71)	$ (483)
Proceeds from Sale of Debt Securities, Available-for-sale			3,507	10,047
Realized Investment Gains Losses
Schedule of Investments [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	7	(259)	7	(366)
Debt Securities [Member]
Schedule of Investments [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	600	2,600	2,000	8,100
Not Designated as Hedging Instrument
Schedule of Investments [Line Items]
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax	(9)	15	(16)	21
Non-qualifying foreign currency derivatives	(39)	14	(34)	61
Other, net
Schedule of Investments [Line Items]
Other, net	(48)	(6)	(63)	45
Total Fixed Maturities, AFS
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Realized Gain	3	15	20	38
Gross losses on sales of fixed maturities	(21)	(80)	(60)	(175)
Change in ACL on fixed maturities, AFS	(3)	0	(8)	(12)
Reduction due to intent to sell	0	0	0	(3)
Equity Securities [Member]
Schedule of Investments [Line Items]
Equity Securities, FV-NI, Realized Gain (Loss)	24	5	74	45
Equity Securities, FV-NI, Unrealized Gain (Loss)	(14)	(267)	(29)	(414)
Equity securities	10	(262)	45	(369)
Mortgages [Member]
Schedule of Investments [Line Items]
Change in ACL on mortgage loans	$ (5)	$ (5)	$ (5)	$ (7)