Derivatives and Hedge Accounting Activities (Schedule of Derivatives not Designated as Hedging Instruments) (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (8)	[1]	$ (44)	[1]	$ 16	[1]	$ (14)	[1]
Fair Value - Derivatives not under Hedge Accounting [Member] | Operating Revenue [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives	23	[1]	(14)	[1]	42	[1]	26	[1]
Fair Value - Derivatives not under Hedge Accounting [Member] | Electric Fuel and Other Energy-Related Purchases [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives	(24)	[1]	5	[1]	(8)	[1]	26	[1]
Fair Value - Derivatives not under Hedge Accounting [Member] | Gas Purchases [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives	(7)	[1]	2	[1]	(18)	[1]	(29)	[1]
Fair Value - Derivatives not under Hedge Accounting [Member] | Interest Rate Contract [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives			$ (37)	[1],[2]			$ (37)	[1],[2]

[1] Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Dominion's Consolidated Statements of Income.

[2] Amounts recorded in Dominion's Consolidated Statements of Income are classified in interest and related charges.