Consolidated Statements Of Operations (Parenthetical) (Non Variable Interest Entity [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Non Variable Interest Entity [Member]
Premiums earned, ceded premiums	$ 2	$ 6	$ 5	$ 9