Common Stock (Details Textuals) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Maximum Total Funded Debt to Total Capitalization Ratio	0.65
Line of Credit Facility, Dividend Restrictions	166
Retained Earnings (Accumulated Deficit)	$ 4,150	$ 3,944
Other Restrictions on Payment of Dividends	0