Other (income) expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income and Expenses [Abstract]
Amortization of Intangible Assets	$ 19	$ 171	$ 108
Equity in net (income) loss of partially-owned entities	(264)	(113)	(231)
(Gains) losses from fair value changes in separate account assets	(11)	19	(2)
Federal excise and capital taxes	19	19	20
Acquisition-related costs (2)	2	9	15
Other	32	15	8
Other (income) expense	$ (222)	$ (51)	$ (190)