Related Party Transactions (Tables) (Virginia Electric and Power Company [Member])

3 Months Ended

Mar. 31, 2012

Virginia Electric and Power Company [Member]

Related Party Transaction [Line Items]

Transactions With Affiliates

Presented below are significant transactions with DRS and other affiliates:

	Three Months Ended March 31,
	2012		2011
(millions)
Commodity purchases from affiliates	$	78	$	62
Services provided by affiliates	96		93