Quarterly Financial Data Quarterly Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended
	Dec. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill impairment				$ 689	$ 0	$ 0
Excess of distribution made above net income	$ 1,120	$ 356	$ 223