Insurance (Obligations Under Funding Agreements - Narrative) (Details) (USD $) In Billions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Insurance [Abstract]
Funding agreements issued to certain SPEs	$ 37.7	$ 35.1	$ 39.9
Funding agreements repaid to certain SPEs	36.8	31.1	41.6
Outstanding funding agreements to certain SPEs	$ 31.2	$ 30.0