Derivatives and Hedge Accounting Activities (Schedule of Derivatives not Designated as Hedging Instruments) (Details) (Fair Value - Derivatives not under Hedge Accounting [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Amount of Gain (Loss) Recognized in Income on Derivatives	$ 30	[1]	$ 24	[1]
Interest Rate Contract [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives	(2)	[1],[2]	0	[1],[2]
Commodity Contract [Member] | Operating revenue [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives	69	[1]	19	[1]
Commodity Contract [Member] | Purchased Gas [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives	(10)	[1]	(11)	[1]
Commodity Contract [Member] | Electric Fuel and Other Energy Related Purchases [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (27)	[1]	$ 16	[1]

[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.