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Related Party Transactions (Tables) (Virginia Electric and Power Company)
9 Months Ended
Sep. 30, 2012
Virginia Electric and Power Company
 
Related Party Transaction [Line Items]  
Transactions With Affiliates
Presented below are significant transactions with DRS and other affiliates:

 
Three Months Ended September 30,
Nine Months Ended September 30,
 
2012
 
2011
2012
 
2011
(millions)
 
 
 
 
 
 
Commodity purchases from affiliates
$
129

 
$
150

$
285

 
$
302

Services provided by affiliates
107

 
101

298

 
294