Assets and Liabilities of Businesses Held For Sale and Discontinued Operations (Narrative and Financial Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Summarized financial information for business held for sale
Assets Held-for-sale, at Carrying Value	$ 48		$ 50
Liabilities of Assets Held-for-sale	2		6
Proceeds from Divestiture of Businesses, Net of Cash Divested	232	0
Preferred Stock, Value, Issued	$ 0		$ 0