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Investments - Net Realized Capital Gains (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery	$ (3)	$ 0	$ 0
Total net realized capital gains (losses)	(627)	509	(14)
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax	28	$ (1)	$ (1)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]		Total net realized capital gains (losses)	Total net realized capital gains (losses)
Realized Investment Gains Losses
Schedule of Investments [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	(108)	$ 155	$ 53
Non-qualifying
Schedule of Investments [Line Items]
Derivative, Gain (Loss) on Derivative, Net	46	12	104
Other investments
Schedule of Investments [Line Items]
Other, net	11	39	47
Total fixed maturities
Schedule of Investments [Line Items]
Debt Securities, Available-for-Sale, Realized Gain	57	319	255
Debt Securities, Available-for-sale, Realized Loss	(315)	(89)	(50)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease)	(18)	4	(28)
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery	6	0	5
Equity Securities [Member]
Schedule of Investments [Line Items]
Equity Securities, FV-NI, Realized Gain (Loss)	(83)	81	(118)
Equity Securities, FV-NI, Unrealized Gain (Loss)	(266)	146	(96)
Debt and Equity Securities, Gain (Loss)	(349)	227	(214)
Mortgage loans
Schedule of Investments [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	$ (7)	$ 9	$ (19)

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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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