Investments (Credit Loss Expense Incurred) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss expense recognized in net income (loss)	$ 1	$ (2)	$ (1)	$ (22)
Associated amortization of DAC, VOBA, DSI and DFEL		1		1
Net credit loss expense recognized in net income (loss)	1	(1)	(1)	(21)
Corporate Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss expense recognized in net income (loss)	$ 1		$ (1)	(20)
RMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss expense recognized in net income (loss)		(1)		(1)
ABS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Gross credit loss expense recognized in net income (loss)		$ (1)		$ (1)