Deferred Policy Acquisition Costs, Value of Business Acquired and Other Policy-Related Intangibles (Negative VOBA) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite Lived Intangible Liabilities
Balance at January 1,	$ 779	$ 827	$ 935
Amortization of negative VOBA	(33)	(56)	(140)
Effect of foreign currency translation and other	4	8	32
Balance at December 31,	750	779	827
Accumulated amortization	$ 3,263	$ 3,230	$ 3,174