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 expense recognized in net income (loss)	$ 1	$ (4)	$ (16)	$ (5)
Intent to sell impairments	(624)		(624)
Intent to sell impairments, unrealized gain position			473
Corporate Bonds [Member]
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items]
Gross credit loss expense recognized in net income (loss)	1	(3)	(17)	(2)
Intent to sell impairments	(518)		(518)
RMBS [Member]
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items]
Gross credit loss expense recognized in net income (loss)		$ (1)	1	(2)
Intent to sell impairments	(19)		(19)
ABS [Member]
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items]
Gross credit loss expense recognized in net income (loss)				$ (1)
Intent to sell impairments	(35)		(35)
CMBS [Member]
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items]
Intent to sell impairments	(31)		(31)
State And Municipal Bonds [Member]
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items]
Intent to sell impairments	(20)		(20)
Hybrid And Redeemable Preferred Securities [Member]
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items]
Intent to sell impairments	$ (1)		$ (1)