Investments (Credit Loss Expense Incurred) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	$ 1	$ (4)	$ (15)	$ (5)
Intent to sell impairments	(3,062)		(3,062)
Intent to sell impairments, unrealized gain position			477
Corporate Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	1	(3)	(16)	(2)
Intent to sell impairments	(2,748)		(2,748)
RMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)		$ (1)	1	(2)
Intent to sell impairments	(55)		(55)
ABS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)				$ (1)
Intent to sell impairments	(53)		(53)
CMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Intent to sell impairments	(52)		(52)
State And Municipal Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Intent to sell impairments	(151)		(151)
Hybrid And Redeemable Preferred Securities [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Intent to sell impairments	$ (3)		$ (3)