Investments (Credit Loss Expense Incurred) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	$ (5)	$ (8)	$ (11)	$ (9)
Net credit loss benefit (expense)	(5)	(8)	(11)	(9)
Corporate Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)		$ (8)	(2)	$ (9)
RMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	(2)		(4)
ABS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	$ (3)		$ (5)