Organization, Basis of Presentation and Significant Accounting Policies (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended				12 Months Ended			12 Months Ended				12 Months Ended
	Dec. 31, 2013		Dec. 31, 2011	Dec. 31, 2012 Scenario, Previously Reported	Dec. 31, 2013 Regulated Distribution		Dec. 31, 2011 Regulated Distribution	Dec. 31, 2012 Regulated Distribution Scenario, Previously Reported	Dec. 31, 2013 Regulated Transmission		Dec. 31, 2012 Regulated Transmission Scenario, Previously Reported	Dec. 31, 2013 Competitive Energy Services		Dec. 31, 2011 Competitive Energy Services	Dec. 31, 2012 Competitive Energy Services Scenario, Previously Reported	Dec. 31, 2013 Other/Corporate		Dec. 31, 2012 Other/Corporate Scenario, Previously Reported
Summary of changes in goodwill
Goodwill, Beginning Balance	$ 6,447		$ 6,441	$ 6,447	$ 5,025		$ 5,025	$ 5,025			$ 526	$ 896		$ 890	$ 896			$ 0
Classification to Assets Held for Sale	(29)	[1]			0	[1]			0	[1]		(29)	[1]			0	[1]
West Virginia asset transfer	0				67				0			(67)				0
Goodwill, Ending Balance	$ 6,418		$ 6,441	$ 6,447	$ 5,092		$ 5,025	$ 5,025	$ 526		$ 526	$ 800		$ 890	$ 896	$ 0		$ 0

[1] See Note 20, Discontinued Operations and Assets Held for Sale.