Segment Information (Details Textuals)	12 Months Ended
	Dec. 31, 2013 Customers Companies sqmi	Oct. 09, 2013 MW
Regulated Distribution
Segment Reporting Information [Line Items]
Number of existing utility operating companies	10
Number of customers served by utility operating companies	6,000,000
Number of square miles in service area	65,000
Megawatts of net demonstrated capacity of competitive segment		3,780
Regulated Distribution | Harrison and Pleasants
Segment Reporting Information [Line Items]
Megawatts of net demonstrated capacity of competitive segment		1,476
Competitive Energy Services
Segment Reporting Information [Line Items]
Megawatts of net demonstrated capacity of competitive segment	14,000
Competitive Energy Services | Unregulated Plants Expected to be Closed by 9/1/2012
Segment Reporting Information [Line Items]
Megawatt capacity of plants expected to be closed	885