Preferred Stock Preferred Stock (Schedule of Preferred Stock) (Details) (Virginia Electric and Power Company, USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended	12 Months Ended
	Mar. 20, 2011	Dec. 31, 2012
Class of Stock [Line Items]
Issued and Outstanding Shares		2,590
Entitled Per Share Upon Liquidation		$ 100.00
Dvidend rate	6.25%	6.12%
$5.00
Class of Stock [Line Items]
Dividend		$ 5.00
Issued and Outstanding Shares		107
Entitled Per Share Upon Liquidation		$ 112.50
$4.04
Class of Stock [Line Items]
Dividend		$ 4.04
Issued and Outstanding Shares		13
Entitled Per Share Upon Liquidation		$ 102.27
$4.20
Class of Stock [Line Items]
Dividend		$ 4.20
Issued and Outstanding Shares		15
Entitled Per Share Upon Liquidation		$ 102.50
$4.12
Class of Stock [Line Items]
Dividend		$ 4.12
Issued and Outstanding Shares		32
Entitled Per Share Upon Liquidation		$ 103.73
$4.80
Class of Stock [Line Items]
Dividend		$ 4.80
Issued and Outstanding Shares		73
Entitled Per Share Upon Liquidation		$ 101.00
$7.05
Class of Stock [Line Items]
Dividend		$ 7.05
Issued and Outstanding Shares		500
Entitled Per Share Upon Liquidation		$ 100.36	[1]
$6.98
Class of Stock [Line Items]
Dividend		$ 6.98
Issued and Outstanding Shares		600
Entitled Per Share Upon Liquidation		$ 100.35	[2]
Flex Money Market Preferred 12/02, Series A
Class of Stock [Line Items]
Issued and Outstanding Shares		1,250
Entitled Per Share Upon Liquidation		$ 100.00	[3]

[1] Through 7/31/2013; $100.00 commencing 8/1/2013

[2] Through 8/31/2013; $100.00 commencing 9/1/2013.

[3] Dividend rate was 6.25% until 3/20/2011. Effective 3/20/11 the rate reset to 6.12% until 3/20/2014 after which the rate will be determined according to periodic auctions for periods established by Virginia Power at the time of the auction process.