Deferred Policy Acquisition Costs, Value of Business Acquired and Other Policy-Related Intangibles (Deferred Sales Inducements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net [Abstract]
Beginning Balance of DSI	$ 391	$ 411	$ 432
Capitalization of DSI	2	2	2
Amortization of DSI	(36)	(39)	(12)
Unrealized investment gain (loss) of DSI	5	17	(11)
Ending Balance of DSI	362	391	411
Beginning Balance of VODA	91	105	120
Amortization of VODA	(13)	(14)	(15)
Ending Balance of VODA	78	91	105
Accumulated amortization of VODA	$ 182	$ 169	$ 155