Fair Value Measurements Fair Value, Option, Quantitative Disclosures (Details) (USD $)														6 Months Ended
	Jun. 30, 2013		Dec. 31, 2012		Jun. 30, 2013 Level 3	Jun. 30, 2013 Level 3 Natural Gas Physical and Financial Forwards and Futures:		Jun. 30, 2013 Level 3 Natural Gas Physical and Financial Options:	Jun. 30, 2013 Level 3 Electricity Physical and Financial Forwards and Futures:	Jun. 30, 2013 Level 3 Electricity Full Requirements Contracts:	Jun. 30, 2013 Level 3 FTRs(3) Physical and Financial Forwards and Futures:		Jun. 30, 2013 Level 3 Liquids Physical and Financial Forwards and Futures:	Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Natural Gas Physical and Financial Forwards and Futures: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Natural Gas Physical and Financial Forwards and Futures: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Natural Gas Physical and Financial Forwards and Futures: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Natural Gas Physical and Financial Options: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Natural Gas Physical and Financial Options: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Natural Gas Physical and Financial Options: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Electricity Physical and Financial Forwards and Futures: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Electricity Physical and Financial Forwards and Futures: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Electricity Physical and Financial Forwards and Futures: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Electricity Full Requirements Contracts: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Electricity Full Requirements Contracts: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Electricity Full Requirements Contracts: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets FTRs(3) Physical and Financial Forwards and Futures: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets FTRs(3) Physical and Financial Forwards and Futures: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets FTRs(3) Physical and Financial Forwards and Futures: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Liquids Physical and Financial Forwards and Futures: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Liquids Physical and Financial Forwards and Futures: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Assets Liquids Physical and Financial Forwards and Futures: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Natural Gas Physical and Financial Forwards and Futures: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Natural Gas Physical and Financial Forwards and Futures: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Natural Gas Physical and Financial Forwards and Futures: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Natural Gas Physical and Financial Options: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Natural Gas Physical and Financial Options: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Natural Gas Physical and Financial Options: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Electricity Physical and Financial Forwards and Futures: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Electricity Physical and Financial Forwards and Futures: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Electricity Physical and Financial Forwards and Futures: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities FTRs(3) Physical and Financial Forwards and Futures: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities FTRs(3) Physical and Financial Forwards and Futures: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities FTRs(3) Physical and Financial Forwards and Futures: Wieghted Average		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Liquids Physical and Financial Forwards and Futures: Minimum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Liquids Physical and Financial Forwards and Futures: Maximum		Jun. 30, 2013 Level 3 Fair Value, Option, Quantitative Disclosures, Liabilities Liquids Physical and Financial Forwards and Futures: Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	$ 1,331,000,000	[1]	$ 828,000,000	[1]	$ 76,000,000	$ 19,000,000	[2]	$ 5,000,000	$ 1,000,000	$ 10,000,000	$ 1,000,000	[3]	$ 40,000,000
Fair Value of Derivative Liabilities	1,100,000,000	[4]	661,000,000	[4]	74,000,000	29,000,000	[2]	9,000,000	2,000,000		26,000,000	[3]	8,000,000
Market Price (per unit)														(1)	[5]	5	[5]	2	[5],[6]	3	[5]	5	[5]	4	[5],[6]	26	[5]	109	[5],[7]	44	[5],[6]	11	[7]	495	[7]	42	[5],[6]	(2)	[5]	5	[5]	0	[5],[6]	0	[5]	2	[5]	1	[5],[6]	(1)	[5]	6	[5]	1	[5],[6]	3	[5]	9	[5]	5	[5],[6]	21	[5]	112	[5]	42	[5],[6]	(2)	[5]	18	[5]	1	[5],[6]	0	[5]	2	[5]	2	[5],[6]
Price Volatility (percentage)																				20.00%	[8]	32.00%	[8]	22.00%	[6],[8]																															19.00%	[8]	32.00%	[8]	25.00%	[6],[8]
Price Correlation (percentage)																				(9.00%)	[9]	100.00%	[9]	36.00%	[6],[9]																															(9.00%)	[9]	100.00%	[9]	36.00%	[6],[9]
Mean Reversion (per unit)																				$ 0	[10]	$ 58	[10]	$ 4	[10],[6]																															$ 0	[10]	$ 58	[10]	$ 4	[10],[6]
Load Shaping (percentage)																																0.00%	[11]	10.00%	[11]	3.00%	[11],[6]
Usage Factor (percentage)																																2.00%	[12]	9.00%	[12]	7.00%	[12],[6]

[1] At June 30, 2013, the total derivative asset balance contains $1,046 million of current assets, $1,040 million and $6 million of which is presented in current derivative assets and assets held for sale, respectively, in Dominion’s Consolidated Balance Sheet, and $285 million of noncurrent assets, which is presented in other deferred charges and other assets in Dominion’s Consolidated Balance Sheet. At December 31, 2012, the total derivative asset balance contains $518 million of current assets, which is presented in current derivative assets in Dominion’s Consolidated Balance Sheet and $310 million of noncurrent assets, which is presented in other deferred charges and other assets in Dominion’s Consolidated Balance Sheet.

[2] Includes basis.

[3] Information represents Virginia Power's quantitative information about Level 3 fair value measurements.

[4] At June 30, 2013, the total derivative liability balance contains $950 million of current liabilities, which is presented in current derivative liabilities in Dominion’s Consolidated Balance Sheet, and $150 million of noncurrent liabilities, which is presented in the other deferred credits and other liabilities in Dominion’s Consolidated Balance Sheet. At December 31, 2012, the total derivative liability balance contains $510 million of current liabilities, which is presented in current derivative liabilities in Dominion’s Consolidated Balance Sheet and $151 million of noncurrent derivative liabilities, which is presented in other deferred credits and other liabilities in Dominion’s Consolidated Balance Sheet.

[5] Represents market prices beyond defined terms for Levels 1 & 2.

[6] Averages weighted by volume.

[7] The range in market prices is the result of large variability in hourly power prices during peak and off-peak hours.

[8] Represents volatilities unrepresented in published markets.

[9] Represents intra-price correlations for which markets do not exist.

[10] Represents mean-reverting property in price simulation modeling.

[11] Converts block monthly loads to 24-hour load shapes.

[12] Represents expected increase (decrease) in sales volumes compared to historical usage.