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, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ (106)	[1]	$ 198	[1]	$ (335)	[1]	$ 54	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	22		26		(238)		(98)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(12)	[2]	28	[2]	(33)	[2]	51	[2]
Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(33)	[1]	131	[1]	(216)	[1]	(27)	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	25		29		(232)		(92)
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(4)	[2]	(8)	[2]	(2)	[2]	(1)	[2]
Commodity | Operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	28		29		(241)		(55)
Commodity | Purchased gas
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	(3)				(4)		(34)
Commodity | Electric fuel and other energy-related purchases
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income					13		(3)
Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(73)	[1],[3]	67	[1],[3]	(119)	[1],[3]	81	[1],[3]
Amount of Gain (Loss) Reclassified from AOCI to Income	(3)	[3]	(3)	[3]	(6)	[3]	(6)	[3]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(8)	[2],[3]	36	[2],[3]	(31)	[2],[3]	52	[2],[3]
Virginia Electric and Power Company
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(1)	[4]	2	[4]	1	[4]	5	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	1		0		6		0
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(12)	[5]	28	[5]	(33)	[5]	51	[5]
Virginia Electric and Power Company | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	0	[4]	(2)	[4]	5	[4]	(1)	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	1		0		6		0
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	(4)	[5]	(8)	[5]	(2)	[5]	(1)	[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		0		6		0
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]	4	[4],[6]	(4)	[4],[6]	6	[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	(8)	[5],[6]	36	[5],[6]	(31)	[5],[6]	52	[5],[6]
Dominion Gas Holdings, LLC
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(31)	[7]	85	[7]	(44)	[7]	109	[7]
Amount of Gain (Loss) Reclassified from AOCI to Income	(5)		0		(12)		(4)
Dominion Gas Holdings, LLC | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(3)	[7]	22	[7]	(2)	[7]	34	[7]
Amount of Gain (Loss) Reclassified from AOCI to Income	(5)		0		(12)		(4)
Dominion Gas Holdings, LLC | Commodity | Operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	(2)		3		(7)		2
Dominion Gas Holdings, LLC | Commodity | Purchased gas
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	(3)		(3)		(5)		(6)
Dominion Gas Holdings, LLC | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(28)	[7],[8]	63	[7],[8]	(42)	[7],[8]	75	[7],[8]
Amount of Gain (Loss) Reclassified from AOCI to Income	$ 0	[8]	$ 0	[8]	$ 0	[8]	$ 0	[8]

[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.

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

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