Investments (Credit Loss Expense Incurred) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	$ (1)	$ (5)	$ (16)	$ (11)
Intent to sell impairments	(1,150)		(4,213)
Intent to sell impairments, unrealized gain position			212
Corporate Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	(1)		(16)	(2)
Intent to sell impairments	(1,057)		(3,805)
RMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)		(2)	1	(4)
Intent to sell impairments	(19)		(74)
ABS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)		$ (3)	(1)	$ (5)
Intent to sell impairments	(4)		(57)
CMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Intent to sell impairments	(7)		(60)
State And Municipal Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Intent to sell impairments	(62)		(214)
Hybrid And Redeemable Preferred Securities [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Intent to sell impairments	$ (1)		$ (3)