Derivatives and Hedge Accounting Activities (Gains and Losses on Derivatives in Cash Flow Hedging Relationships) (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 AOCI on Derivatives- Effective Portion	$ 18	[1]	$ (16)	[1]	$ (125)	[1]	$ 280	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	27		160		9		283
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(3)	[2]	(22)	[2]	(9)	[2]	(37)	[2]
Cash Flow Hedges [Member] | Operating Revenue [Member] | Commodity Contract [Member]
Amount of Gain (Loss) Reclassified from AOCI to Income	32		114		60		295
Cash Flow Hedges [Member] | Electric Fuel and Other Energy-Related Purchases [Member] | Commodity Contract [Member]
Amount of Gain (Loss) Reclassified from AOCI to Income	1		(5)		2		(8)
Cash Flow Hedges [Member] | Commodity Contract [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivatives- Effective Portion	49	[1]	(16)	[1]	(93)	[1]	283	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	27		91		9		173
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(4)	[2]	2	[2]	(9)	[2]	(11)	[2]
Cash Flow Hedges [Member] | Commodity Contract [Member] | Gas Purchases [Member]
Amount of Gain (Loss) Reclassified from AOCI to Income	(7)		(19)		(55)		(116)
Cash Flow Hedges [Member] | Commodity Contract [Member] | Electric Capacity Purchases [Member]
Amount of Gain (Loss) Reclassified from AOCI to Income	1		1		2		2
Cash Flow Hedges [Member] | Interest Rate Contract [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivatives- Effective Portion	(31)	[1],[3]			(32)	[1],[3]	(3)	[1],[3]
Amount of Gain (Loss) Reclassified from AOCI to Income			70	[3]			110	[3]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	1	[2],[3]	(23)	[2],[3]			(24)	[2],[3]
Cash Flow Hedges [Member] | Foreign Currency [Member]
Amount of Gain (Loss) Reclassified from AOCI to Income			(1)	[4]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment			$ (1)	[2],[4]			$ (2)	[2],[4]

[1] Amounts deferred into AOCI have no associated effect in Dominion's Consolidated Statements of Income.

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

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

[4] Amounts recorded in Dominion's Consolidated Statements of Income are classified in electric fuel and other energy-related purchases.