Related Party Transactions (Effects of Affiliated Reinsurance on Statements of Operations) (Details) - Affiliated Entity - Assumed - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Premiums:
Reinsurance assumed	$ 2	$ (1)	$ 2	$ 0
Universal life and investment-type product policy fees:
Reinsurance assumed	1	2	5	5
Other revenues:
Reinsurance assumed	0	1	1	2
Policyholder benefits and claims:
Reinsurance assumed	31	8	54	25
Other Expenses
Reinsurance assumed	$ (7)	$ (7)	$ (19)	$ (23)