Derivatives and Hedge Accounting Activities (Gains and Losses on Derivatives in Cash Flow Hedging Relationships) (Details) (Cash Flow Hedges, USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ 3	[1]	$ 18	[1]	$ 211	[1]	$ (125)	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	42		27		70		9
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(59)	[2]	(3)	[2]	(33)	[2]	(9)	[2]
Commodity Contract
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	111	[1]	49	[1]	287	[1]	(93)	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	41		27		68		9
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	9	[2]	(4)	[2]	8	[2]	(9)	[2]
Commodity Contract | Operating Revenue
Amount of Gain (Loss) Reclassified from AOCI to Income	63		32		127		60
Commodity Contract | Gas Purchases
Amount of Gain (Loss) Reclassified from AOCI to Income	(17)		(7)		(47)		(55)
Commodity Contract | Electric fuel and other energy-related purchases
Amount of Gain (Loss) Reclassified from AOCI to Income	(5)		1		(12)		2
Commodity Contract | Purchased Gas
Amount of Gain (Loss) Reclassified from AOCI to Income			1				2
Interest Rate Contract
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(108)	[1],[3]	(31)	[1],[3]	(76)	[1],[3]	(32)	[1],[3]
Amount of Gain (Loss) Reclassified from AOCI to Income	1	[3]	0	[3]	2	[3]	0	[3]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(68)	[2],[3]	1	[2],[3]	(41)	[2],[3]	0	[2],[3]
Virginia Electric and Power Company
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(4)	[4]	0	[4]	(5)	[4]	0	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	(1)		1		(3)		2
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(59)	[5]	(3)	[5]	(33)	[5]	(9)	[5]
Virginia Electric and Power Company | Commodity Contract
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	1	[4]	0	[4]	(1)	[4]	0	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	(1)		0		(3)		1
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	9	[5]	(4)	[5]	8	[5]	(9)	[5]
Virginia Electric and Power Company | Commodity Contract | Electric fuel and other energy-related purchases
Amount of Gain (Loss) Reclassified from AOCI to Income	(1)
Virginia Electric and Power Company | Commodity Contract | Purchased Gas
Amount of Gain (Loss) Reclassified from AOCI to Income			0		(3)		1
Virginia Electric and Power Company | Interest Rate Contract
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(5)	[4],[6]	0	[4],[6]	(4)	[4],[6]	0	[4],[6]
Amount of Gain (Loss) Reclassified from AOCI to Income	0	[6]	1	[6]	0	[6]	1	[6]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	$ (68)	[5],[6]	$ 1	[5],[6]	$ (41)	[5],[6]	$ 0	[5],[6]

[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 deferred into AOCI have no associated effect in Virginia Power’s Consolidated Statements of Income.

[5] Represents net derivative activity deferred into and amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Virginia Power’s Consolidated Statements of Income.

[6] Amounts are recorded in interest and related charges in Virginia Power’s Consolidated Statements of Income.