Significant Financing Transactions - (Narrative) (Details) (USD $)	1 Months Ended				6 Months Ended																										1 Months Ended					1 Months Ended			1 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Feb. 28, 2014	Jul. 01, 2014 Subsequent Event	Jun. 30, 2014 Convertible Debt	Feb. 28, 2014 Senior Notes Maturing in 2024 Senior Notes	Feb. 28, 2014 Senior Notes Maturing in 2044 Senior Notes	Mar. 31, 2014 Senior Notes Maturing in 2017 Senior Notes	Apr. 30, 2014 Utility Tax Exempt Loan, 2.5%, due 2022 Solid Waste and Sewage Disposal Revenue Bonds	Apr. 30, 2014 Utility Tax Exempt Loan, 2.5%, due 2030 Solid Waste and Sewage Disposal Revenue Bonds	Jun. 30, 2014 Credit Facility 4 Billion		May 31, 2014 Credit Facility 4 Billion		Jul. 09, 2014 Credit Facility 4 Billion Subsequent Event		Jun. 30, 2014 Credit Facility 500 Million		Jun. 30, 2014 Virginia Electric and Power Company		Jul. 10, 2014 Virginia Electric and Power Company Subsequent Event	Jun. 30, 2014 Virginia Electric and Power Company Tax Exempt Debt	Jun. 30, 2014 Virginia Electric and Power Company Credit Facility 4 Billion		Jul. 10, 2014 Virginia Electric and Power Company Credit Facility 4 Billion Subsequent Event		Jul. 09, 2014 Virginia Electric and Power Company Credit Facility 4 Billion Subsequent Event		Jun. 30, 2014 Virginia Electric and Power Company Credit Facility 500 Million		Jun. 30, 2014 Dominion Gas Holdings, LLC Senior Notes	Jun. 30, 2014 Dominion Gas Holdings, LLC Credit Facility 4 Billion		Jun. 30, 2014 Dominion Gas Holdings, LLC Credit Facility 500 Million		Jul. 31, 2017 Scenario, Forecast Minimum	Jul. 31, 2017 Scenario, Forecast Maximum	Jul. 01, 2014 Common Stock Subsequent Event	Jul. 31, 2014 Capital Unit, Class A Subsequent Event	Jul. 01, 2014 Capital Unit, Class A Subsequent Event
Debt Instrument [Line Items]
Credit facility																			$ 120,000,000
Variable rate tax-exempt financings																						119,000,000
Facility Limit		4,500,000,000									4,000,000,000	[1]	3,000,000,000	[1]	4,000,000,000	[1]	500,000,000	[2]	1,250,000,000	[3]	1,500,000,000.0		1,000,000,000	[3],[4]	1,250,000,000.00	[4]	1,000,000,000.0	[4]	250,000,000	[3],[5]		1,000,000,000	[1]
Credit Facility, to support letters of credit											1,500,000,000.0												1,500,000,000.0									500,000,000	[1]	0	[2]
Long term debt amount						350,000,000	400,000,000	400,000,000	10,000,000	30,000,000
Annual Interest Rate						3.45%	4.45%	1.25%	2.50%	2.50%
Principal amount of unsecured senior notes																															1,200,000,000
Contingent convertible senior notes					36,000,000
Conversion rate, shares of common stock per $1,000 principal amount of senior notes (in shares)					30.1180
Principal amount of senior notes					$ 1,000
Conversion rate, shares of common stock per $1,000 principal amount of senior notes, conversion price					$ 33.20
Issuance of additional shares					550,000
Average trading price principal amount of senior notes (percentage)					120.00%
Minimum consecutive trading days					20 days
Maximum consecutive trading days					30 days
Debt conversion converted instrument amount					7,000,000
Amount of common stock					7,000,000
Amount of outstanding shares			1,250,000
Redemption price per share	$ 100
Dividend rate	6.12%
Amount of Equity Units issued																																							$ 1,000,000,000
Payment rate for Equity Units																																								6.375%
Percentage interest in RSN issued				5.00%
Purchase price per unit																																						$ 50
Shares to be issued under terms of stock purchase contracts																																				11,500,000	14,300,000
Common stock reserved for issuance in connection with stock purchase contracts				17,750,000

[1] In May 2014, this credit facility was amended and restated. The facility limit was increased from $3 billion to $4 billion and the maturity date was extended from September 2018 to April 2019. This credit facility can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $1.5 billion of letters of credit.

[2] In May 2014, this credit facility was amended and restated and the maturity date was extended from September 2018 to April 2019. This credit facility can be used to support bank borrowings, commercial paper and letter of credit issuances.

[3] On June 30, 2014, Virginia Power's facility sub-limit was exceeded; however, Virginia Power retained ongoing access to its short-term demand note with Dominion as discussed in Note 17 and remained in compliance with its debt covenants. Effective July 10, 2014, Virginia Power increased its sub-limit under the $4 billion credit facility from $1.0 billion to $1.25 billion bringing its total sub-limit to $1.5 billion.

[4] In May 2014, this credit facility was amended and restated and the maturity date was extended from September 2018 to April 2019. This credit facility can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $1.5 billion (or the sub-limit, whichever is less) of letters of credit. Virginia Power's current sub-limit under this credit facility can be increased or decreased multiple times per year.

[5] In May 2014, this credit facility was amended and restated and the maturity date was extended from September 2018 to April 2019. This credit facility can be used to support bank borrowings, commercial paper and letter of credit issuances. Virginia Power's current sub-limit under this credit facility can be increased or decreased multiple times per year.