Derivatives and Hedge Accounting Activities (Gains and Losses on Derivatives in Cash Flow Hedging Relationships) (Details) (Cash Flow Hedges [Member], USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ (135)	[1]	$ (5)	[1]	$ (260)	[1]	$ 274	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	15		87		24		370
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(77)	[2]	(5)	[2]	(86)	[2]	(42)	[2]
Interest Rate Contract [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(204)	[1],[3]	0	[1],[3]	(236)	[1],[3]	(3)	[1],[3]
Amount of Gain (Loss) Reclassified from AOCI to Income	(8)	[3]	0	[3]	(8)	[3]	109	[3]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(76)	[2],[3]	1	[2],[3]	(76)	[2],[3]	(23)	[2],[3]
Commodity Contract [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	69	[1]	(5)	[1]	(24)	[1]	277	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	23		87		32		260
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(1)	[2]	(6)	[2]	(10)	[2]	(17)	[2]
Commodity Contract [Member] | Operating Revenue [Member]
Amount of Gain (Loss) Reclassified from AOCI to Income	28		88		88		383
Commodity Contract [Member] | Electric Fuel and Other Energy-Related Purchases [Member]
Amount of Gain (Loss) Reclassified from AOCI to Income	2		4		4		(4)
Commodity Contract [Member] | Gas Purchases [Member]
Amount of Gain (Loss) Reclassified from AOCI to Income	(7)		(6)		(61)		(122)
Commodity Contract [Member] | Electric Capacity Purchases [Member]
Amount of Gain (Loss) Reclassified from AOCI to Income			1		1		3
Foreign Currency [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)			0	[1],[4]			0	[1],[4]
Amount of Gain (Loss) Reclassified from AOCI to Income			0	[4]			1	[4]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment			$ 0	[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.