Deferred Policy Acquisition Costs, Value of Business Acquired and Other Policy-Related Intangibles (Negative VOBA) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Liabilities
Balance at January 1,	$ 827	$ 935	$ 1,193
Amortization of negative VOBA	(56)	(140)	(269)
Effect of foreign currency translation and other	8	32	11
Balance at December 31,	779	827	935
Accumulated amortization	$ 3,230	$ 3,174	$ 3,034