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, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ 198	[1]	$ 3	[1]	$ 54	[1]	$ 211	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	26		42		(98)		70
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	28	[2]	(59)	[2]	51	[2]	(33)	[2]
Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	131	[1]	111	[1]	(27)	[1]	287	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	29		41		(92)		68
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(8)	[2]	9	[2]	(1)	[2]	8	[2]
Commodity | Operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	29		63		(55)		127
Commodity | Purchased gas
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income			(17)		(34)		(47)
Commodity | Electric fuel and other energy-related purchases
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income			(5)		(3)		(12)
Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	67	[1],[3]	(108)	[1],[3]	81	[1],[3]	(76)	[1],[3]
Amount of Gain (Loss) Reclassified from AOCI to Income	(3)	[3]	1	[3]	(6)	[3]	2	[3]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	36	[2],[3]	(68)	[2],[3]	52	[2],[3]	(41)	[2],[3]
Virginia Electric and Power Company
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	2	[4]	(4)	[4]	5	[4]	(5)	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	0		(1)		0		(3)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	28	[5]	(59)	[5]	51	[5]	(33)	[5]
Virginia Electric and Power Company | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(2)	[4]	1	[4]	(1)	[4]	(1)	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	0		(1)		0		(3)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(8)	[5]	9	[5]	(1)	[5]	8	[5]
Virginia Electric and Power Company | Commodity | Electric fuel and other energy-related purchases
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	0		(1)		0		(3)
Virginia Electric and Power Company | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	4	[4],[6]	(5)	[4],[6]	6	[4],[6]	(4)	[4],[6]
Amount of Gain (Loss) Reclassified from AOCI to Income	0	[6]	0	[6]	0	[6]	0	[6]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	$ 36	[5],[6]	$ (68)	[5],[6]	$ 52	[5],[6]	$ (41)	[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 recorded in Virginia Power’s Consolidated Statements of Income are classified in interest and related charges.