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				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ (120)	[1]	$ (143)	[1]	$ (66)	[1]	$ 68	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	10		32		(88)		102
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	18	[2]	3	[2]	69	[2]	(30)	[2]
Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(110)	[1]	(128)	[1]	(137)	[1]	159	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	16		31		(76)		100
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	4	[2]	7	[2]	3	[2]	14	[2]
Commodity | Operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	24		44		(31)		171
Commodity | Purchased gas
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	(5)		(9)		(39)		(55)
Commodity | Electric fuel and other energy-related purchases
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	(3)		(4)		(6)		(16)
Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(10)	[1],[3]	(15)	[1],[3]	71	[1],[3]	(91)	[1],[3]
Amount of Gain (Loss) Reclassified from AOCI to Income	(6)	[3]	1	[3]	(12)	[3]	2	[3]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	14	[2],[3]	(4)	[2],[3]	66	[2],[3]	(44)	[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]	(3)	[4]	7	[4]	(8)	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	(1)		(1)		0		(4)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	18	[5]	3	[5]	69	[5]	(30)	[5]
Virginia Electric and Power Company | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	1	[4]	0	[4]	0	[4]	(1)	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	(1)		(1)		0		(4)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	4	[5]	7	[5]	3	[5]	14	[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	(1)		(1)		0		(4)
Virginia Electric and Power Company | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	1	[4],[6]	(3)	[4],[6]	7	[4],[6]	(7)	[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	$ 14	[5],[6]	$ (4)	[5],[6]	$ 66	[5],[6]	$ (44)	[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.