Transactions With Affliated Parties (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]
Payment for commissions	$ 6	$ 5	$ 6
Earned premiums	3,902	3,522	3,194
Affiliated parties [Member]
Related Party Transaction [Line Items]
Earned premiums	$ 35	$ 35	$ 34