Commitments and Contingencies (Nuclear Operations) (Narrative) (Details) (USD $)	1 Months Ended	12 Months Ended				3 Months Ended				12 Months Ended					3 Months Ended
	Nov. 30, 2013	Dec. 31, 2013	Dec. 31, 2013 Spent Nuclear Fuel	Dec. 31, 2012 Spent Nuclear Fuel	Dec. 31, 2013 Millstone Unit 1	Dec. 31, 2013 Kewaunee	Dec. 31, 2012 Kewaunee	Dec. 31, 2013 Millstone	Dec. 31, 2012 Millstone	Dec. 31, 2013 Nuclear Plant	Dec. 31, 2013 Virginia Electric and Power Company	Dec. 31, 2013 Virginia Electric and Power Company Spent Nuclear Fuel	Dec. 31, 2012 Virginia Electric and Power Company Spent Nuclear Fuel	Dec. 31, 2013 Virginia Electric and Power Company Kewaunee	Dec. 31, 2012 Virginia Electric and Power Company Surry and North Anna
Loss Contingencies [Line Items]
Coverage that exceeds NRC minimum requirement		$ 1,060,000,000.00
Minimum financial assurance					2,800,000,000									1,800,000,000
Liability protection under Price-Anderson Act										13,600,000,000
Amount of coverage purchased from commercial insurance pools		375,000,000
Amount that could be assessed for each licensed reactor		127,000,000
Amount that could be assessed for each licensed reactor per reactor		19,000,000
Maximum assessment for premiums on insurance policy		71,000,000									39,000,000
Maximum assessment for insurance policy		19,000,000									9,000,000
Payments for legal settlements							6,000,000	5,000,000	20,000,000						75,000,000
Litigation Settlement, Amount						2,000,000
Receivables			79,000,000	36,000,000								50,000,000	26,000,000
Current fee per kWh for electricity paid by civilian nuclear power generators	1
Waste fee recognized		$ 44,000,000									$ 27,000,000