Other (income) expense (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Income and Expenses [Abstract]
Amortization of Intangible Assets	$ 95	$ 51	$ 29
Equity in net (income) loss of partially-owned entities	(119)	(80)	(32)
(Gains) losses from fair value changes in separate account assets	(16)	(29)	36
Federal excise and capital taxes	24	22	20
Acquisition-related costs	4	11	5
Other	27	19	23
Other (income) expense	$ 15	$ (6)	$ 81