Investments (Credit Loss Expense Incurred) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	$ (4)	$ 1	$ (5)	$ (1)
Net credit loss benefit (expense)	(4)	1	(5)	(1)
Corporate Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	(3)	$ 1	(2)	$ (1)
RMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)	$ (1)		(2)
ABS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss benefit (expense)			$ (1)