Investments - Investments - Net Realized Capital Gains (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Schedule of Investments [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ (84)	$ (17)	$ (439)	$ 92
Reduction due to intent to sell	3	0	3	0
Net realized (losses) gains	(166)	70	(649)	297
Not Designated as Hedging Instrument
Schedule of Investments [Line Items]
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax	16	6	37	(1)
Other, net
Schedule of Investments [Line Items]
Other, net	(15)	14	30	39
Total Fixed Maturities, AFS
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Realized Gain	16	63	54	162
Gross losses on sales of fixed maturities	(81)	(8)	(256)	(54)
Change in ACL on fixed maturities, AFS	(3)	0	(15)	4
Reduction due to intent to sell	(2)	0	(5)	0
Equity Securities [Member]
Schedule of Investments [Line Items]
Equity Securities, FV-NI, Realized Gain (Loss)	(9)	35	36	43
Equity Securities, FV-NI, Unrealized Gain (Loss)	(72)	(32)	(486)	91
Equity securities	(81)	3	(450)	134
Mortgages [Member]
Schedule of Investments [Line Items]
Change in ACL on mortgage loans	$ 0	$ (2)	$ (7)	$ 12

Amount of increase (decrease) in allowance for credit loss of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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