Reinsurance (Life Insurance Contract Holders' Benefits Incurred On Ceded Business) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net incurred loss and loss expenses	$ 2,505	$ 2,322	$ 2,524
Life Insurance Segment [Member]
Direct contract holders' benefits incurred	266	232	232
Ceded contract holders' benefits incurred	(62)	(47)	(43)
Net incurred loss and loss expenses	$ 204	$ 185	$ 189