Dominion Energy (D) 10-Q 5 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	D
Entity Registrant Name	DOMINION RESOURCES INC /VA/
Entity Central Index Key	715957
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	589,330,633
Virginia Electric and Power Company
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	VEL - PE
Entity Registrant Name	VIRGINIA ELECTRIC & POWER CO
Entity Central Index Key	103682
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding	274,723
Dominion Gas Holdings, LLC
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Entity Registrant Name	Dominion Gas Holdings, LLC
Entity Central Index Key	1603291
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding	0

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Operating Revenue	$3,409		$3,630
Operating Expenses
Electric fuel and other energy-related purchases	953		1,334
Purchased electric capacity	94		88
Purchased gas	250		540
Other operations and maintenance	602		425
Depreciation, depletion and amortization	343		308
Other taxes	165		167
Total operating expenses	2,407		2,862
Income from operations	1,002		768
Other income	60		40
Interest and related charges	223		237
Income from continuing operations including noncontrolling interests before income tax expense	839		571
Income tax expense	299		186
Net Income Including Noncontrolling Interests	540		385
Noncontrolling Interests	4		6
Net Income Attributable to Dominion	536		379
Earnings Per Common Share - Basic and Diluted
Net income attributable to Dominion (in dollars per share)	$0.91		$0.65
Dividends declared per common share (dollars per share)	$0.65		$0.60
Virginia Electric and Power Company
Operating Revenue	2,137	[1]	1,983	[1]
Operating Expenses
Electric fuel and other energy-related purchases	810	[1]	650	[1]
Purchased electric capacity	94		88
Affiliated suppliers	75		71
Other	321		270
Depreciation, depletion and amortization	238		218
Other taxes	74		73
Total operating expenses	1,612		1,370
Income from operations	525		613
Other income	15		15
Interest and related charges	108		107
Income from continuing operations including noncontrolling interests before income tax expense	432		521
Income tax expense	163		197
Net Income Attributable to Dominion	269		324
Preferred dividends	0		6
Balance available for common stock	269		318
Dominion Gas Holdings, LLC
Operating Revenue	531	[2]	569	[2]
Operating Expenses
Purchased gas	74	[2]	137	[2]
Other energy-related purchases	6		16
Affiliated suppliers	21		21
Other	53	[3]	32	[3]
Depreciation, depletion and amortization	51		47
Other taxes	55		51
Total operating expenses	260		304
Income from operations	271		265
Other income	9		8
Interest and related charges	17		6
Income from continuing operations including noncontrolling interests before income tax expense	263		267
Income tax expense	102		103
Net Income Attributable to Dominion	$161		$164
[1]	See Note 17 for amounts attributable to affiliates.
[2]	See Note 17 for amounts attributable to related parties.
[3]	Includes gains on the sales of assets to related parties of $59 million in 2014. See Note 10 for more information.

Consolidated_Statements_of_Inc1

Consolidated Statements of Income (Parenthetical) (Dominion Gas Holdings, LLC, Affiliated Entity, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Dominion Gas Holdings, LLC | Affiliated Entity
Gain on sale of assets	$59

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Net income including noncontrolling interests	$540		$385
Net income	536		379
Other comprehensive income (loss), net of taxes:
Net deferred losses on derivatives-hedging activities	-58	[1]	-150	[1]
Changes in unrealized net gains (losses) on investment securities	15	[2]	29	[2]
Changes in unrecognized pension and other postretirement benefit costs	0	[3]	-4	[3]
Amounts reclassified to net income:
Net derivative (gains) losses-hedging activities	59	[4]	160	[4]
Net realized (gains) losses on investment securities	-21	[5]	-11	[5]
Net pension and other postretirement benefit costs	13	[6]	8	[6]
Changes in other comprehensive loss from equity method investees	-1		-7
Total other comprehensive income	7		25
Comprehensive income including noncontrolling interests	547		410
Comprehensive income attributable to noncontrolling interests	4		6
Comprehensive income attributable to Dominion	543		404
Virginia Electric and Power Company
Net income	269		324
Other comprehensive income (loss), net of taxes:
Net deferred losses on derivatives-hedging activities	-4	[7]	2	[7]
Changes in unrealized net gains (losses) on investment securities	1	[8]	2	[8]
Amounts reclassified to net income:
Net derivative (gains) losses-hedging activities	1	[9]	-3	[9]
Net realized (gains) losses on investment securities	-1	[10]	-2	[10]
Total other comprehensive income	-3		-1
Comprehensive income attributable to Dominion	266		323
Dominion Gas Holdings, LLC
Net income	161		164
Other comprehensive income (loss), net of taxes:
Net deferred losses on derivatives-hedging activities	-4	[11]	-8	[11]
Amounts reclassified to net income:
Net derivative (gains) losses-hedging activities	0	[12]	5	[12]
Net pension and other postretirement benefit costs	1	[13]	1	[13]
Total other comprehensive income	-3		-2
Comprehensive income attributable to Dominion	$158		$162
[1]	Net of $41 million and $80 million tax for the three months ended March 31, 2015 and 2014, respectively.
[2]	Net of $(11) million and $(1) million tax for the three months ended March 31, 2015 and 2014, respectively.
[3]	Net of $--- million and $(4) million tax for the three months ended March 31, 2015 and 2014, respectively.
[4]	Net of $(39) million and $(100) million tax for the three months ended March 31, 2015 and 2014, respectively.
[5]	Net of $12 million and $7 million tax for the three months ended March 31, 2015 and 2014, respectively
[6]	Net of $(9) million and $(6) million tax for the three months ended March 31, 2015 and 2014, respectively.
[7]	Net of $2 million and $(1) million tax for the three months ended March 31, 2015 and 2014, respectively.
[8]	Net of $(1) million and $(2) million tax for the three months ended March 31, 2015 and 2014, respectively
[9]	Net of $--- million and $2 million tax for the three months ended March 31, 2015 and 2014, respectively.
[10]	Net of $--- million and $1 million tax for the three months ended March 31, 2015 and 2014, respectively.
[11]	Net of $2 million and $5 million tax for the three months ended March 31, 2015 and 2014, respectively.
[12]	Net of $--- million and $(3) million tax for the three months ended March 31, 2015 and 2014, respectively.
[13]	Net of $(1) million tax for both the three months ended March 31, 2015 and 2014.

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net deferred gains (losses) on derivative-hedging activities, tax	$41	$80
Changes in unrealized net gains (losses) on investment securities, tax	-11	-1
Changes in unrecognized pension and other postretirement benefit costs, tax	0	-4
Net derivative (gains) losses-hedging activities, tax	-39	-100
Net realized (gains) losses on investment securities, tax	12	7
Net pension and other postretirement benefit costs, tax	-9	-6
Virginia Electric and Power Company
Net deferred gains (losses) on derivative-hedging activities, tax	2	-1
Changes in unrealized net gains (losses) on investment securities, tax	-1	-2
Net derivative (gains) losses-hedging activities, tax	0	2
Net realized (gains) losses on investment securities, tax	0	1
Dominion Gas Holdings, LLC
Net deferred gains (losses) on derivative-hedging activities, tax	2	5
Net derivative (gains) losses-hedging activities, tax	0	-3
Net pension and other postretirement benefit costs, tax	($1)	($1)

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Current Assets
Cash and cash equivalents	$275		$318	[1]
Customer receivables (less allowance for doubtful accounts)	1,589		1,514	[1]
Other receivables (less allowance for doubtful accounts)	113		119	[1]
Inventories	1,227		1,410	[1]
Prepayments	163		167	[1]
Deferred income taxes	673		800	[1]
Regulatory assets	362	[2]	347	[2]
Other	1,013		1,287	[1]
Total current assets	5,053		5,615	[1]
Investments
Nuclear decommissioning trust funds	4,244		4,196	[1]
Investment in equity method affiliates	1,085		1,081	[1]
Other	288		284	[1]
Total investments	5,617		5,561	[1]
Property, Plant and Equipment
Property, plant and equipment	52,720		51,406	[1]
Accumulated depreciation, depletion and amortization	-15,494		-15,136	[1]
Total property, plant and equipment, net	37,226		36,270	[1]
Deferred Charges and Other Assets
Goodwill	3,294		3,044	[1]
Pension and other postretirement benefit assets	979		956	[1]
Regulatory assets	1,665		1,642	[1]
Other	1,322		1,239	[1]
Total deferred charges and other assets	7,260		6,881	[1]
Total assets	55,156		54,327	[1]
Current Liabilities
Securities due within one year	1,822		1,375	[1]
Short-term debt	3,200		2,775	[1]
Accounts payable	945		952	[1]
Derivative liabilities	600		591	[1]
Other	1,454		1,505	[1]
Total current liabilities	8,021		7,198	[1]
Long-Term Debt
Long-term debt	17,896		18,348	[1]
Junior subordinated notes	1,373		1,374	[1]
Remarketable subordinated notes	2,084		2,083	[1]
Total long-term debt	21,353		21,805	[1]
Deferred Credits and Other Liabilities
Deferred income taxes and investment tax credits	7,577		7,444	[1]
Asset retirement obligations	1,645		1,633	[1]
Regulatory liabilities	2,119		1,991	[1]
Other	2,025		2,299	[1]
Total deferred credits and other liabilities	13,366		13,367	[1]
Total liabilities	42,740		42,370	[1]
Commitments and Contingencies (see Note 15)				[1]
Equity
Common stock - no par	6,170	[3]	5,876	[1],[3]
Retained earnings	6,250		6,095	[1]
Accumulated other comprehensive loss	-409		-416	[1]
Total common shareholders' equity	12,011		11,555	[1]
Noncontrolling interests	405		402	[1]
Total equity	12,416		11,957	[1]
Total liabilities and equity	55,156		54,327	[1]
Virginia Electric and Power Company
Current Assets
Cash and cash equivalents	16		15	[4]
Customer receivables (less allowance for doubtful accounts)	1,018		986	[4]
Other receivables (less allowance for doubtful accounts)	53		65	[4]
Inventories	768		853	[4]
Prepayments	38		252	[4]
Regulatory assets	339		298	[4]
Other	32	[5]	82	[4],[5]
Total current assets	2,264		2,551	[4]
Investments
Nuclear decommissioning trust funds	1,950		1,930	[4]
Other	4		4	[4]
Total investments	1,954		1,934	[4]
Property, Plant and Equipment
Property, plant and equipment	35,684		35,180	[4]
Accumulated depreciation, depletion and amortization	-11,255		-11,080	[4]
Total property, plant and equipment, net	24,429		24,100	[4]
Deferred Charges and Other Assets
Regulatory assets	464		439	[4]
Other	525	[5]	485	[4],[5]
Total deferred charges and other assets	989		924	[4]
Total assets	29,636		29,509	[4]
Current Liabilities
Securities due within one year	661		211	[4]
Short-term debt	1,588		1,361	[4]
Accounts payable	456		458	[4]
Payables to affiliates	72		92	[4]
Affiliated current borrowings	10		427	[4]
Accrued interest, payroll and taxes	315		199	[4]
Other	505		528	[4]
Total current liabilities	3,607		3,276	[4]
Long-Term Debt
Total long-term debt	8,275		8,726	[4]
Deferred Credits and Other Liabilities
Deferred income taxes and investment tax credits	4,435		4,415	[4]
Asset retirement obligations	854		848	[4]
Regulatory liabilities	1,769		1,683	[4]
Other	523	[5]	506	[4],[5]
Total deferred credits and other liabilities	7,581		7,452	[4]
Total liabilities	19,463		19,454	[4]
Commitments and Contingencies (see Note 15)				[4]
Equity
Common stock - no par	5,738	[6]	5,738	[4],[6]
Other paid-in capital	1,113		1,113	[4]
Retained earnings	3,275		3,154	[4]
Accumulated other comprehensive loss	47		50	[4]
Total common shareholders' equity	10,173		10,055	[4]
Total liabilities and equity	29,636		29,509	[4]
Dominion Gas Holdings, LLC
Current Assets
Cash and cash equivalents	19		9	[7]
Customer receivables (less allowance for doubtful accounts)	350	[8]	322	[7],[8]
Other receivables (less allowance for doubtful accounts)	15		19	[7]
Affiliated receivables	5		12	[7]
Inventories	67		65	[7]
Prepayments	64		166	[7]
Regulatory assets	16	[2]	38	[2]
Other	198	[8]	217	[7],[8]
Total current assets	718		810	[7]
Investments
Investment in equity method affiliates	103		107
Total investments	104		108	[7]
Property, Plant and Equipment
Property, plant and equipment	8,993		8,902	[7]
Accumulated depreciation, depletion and amortization	-2,568		-2,538	[7]
Total property, plant and equipment, net	6,425		6,364	[7]
Deferred Charges and Other Assets
Goodwill	542		542	[7]
Intangible assets, net	83		79	[7]
Regulatory assets	390		379	[7]
Pension and other postretirement benefit assets	1,516	[8]	1,486	[7],[8]
Other	81	[8]	80	[7],[8]
Total deferred charges and other assets	2,612		2,566	[7]
Total assets	9,859		9,848	[7]
Current Liabilities
Short-term debt	280		0	[7]
Accounts payable	209		247	[7]
Payables to affiliates	40		41	[7]
Affiliated current borrowings	39		384	[7]
Accrued interest, payroll and taxes	243		194	[7]
Other	163	[8]	172	[7],[8]
Total current liabilities	974		1,038	[7]
Long-Term Debt
Total long-term debt	2,594		2,594	[7]
Deferred Credits and Other Liabilities
Deferred income taxes and investment tax credits	2,197		2,158	[7]
Regulatory liabilities	198	[9]	192	[9]
Other	465	[8]	492	[7],[8]
Total deferred credits and other liabilities	2,662		2,650	[7]
Total liabilities	6,230		6,282	[7]
Commitments and Contingencies (see Note 15)				[7]
Equity
Membership interests	3,718		3,652	[7]
Accumulated other comprehensive loss	-89	[8]	-86	[7],[8]
Total common shareholders' equity	3,629		3,566	[7]
Total liabilities and equity	$9,859		$9,848	[7]
[1]	Dominion’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[2]	Current regulatory assets are presented in other current assets in Dominion's and Dominion Gas' Consolidated Balance Sheets.
[3]	1 billion shares authorized; 589 million shares and 585 million shares outstanding at March 31, 2015 and December 31, 2014, respectively.
[4]	Virginia Power’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[5]	See Note 17 for amounts attributable to affiliates.
[6]	500,000 shares authorized; 274,723 shares outstanding at March 31, 2015 and December 31, 2014.
[7]	Dominion Gas’ Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[8]	See Note 17 for amounts attributable to related parties.
[9]	Noncurrent regulatory liabilities are presented in other deferred credits and other liabilities in Dominion Gas' Consolidated Balance Sheets.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, except Share data, unless otherwise specified
Customer receivables, allowance for doubtful accounts	$34	$34
Other receivables, allowance for doubtful accounts	2	3
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares outstanding	589,000,000	585,000,000
Virginia Electric and Power Company
Customer receivables, allowance for doubtful accounts	25	25
Other receivables, allowance for doubtful accounts	1	1
Common stock, shares authorized	500,000	500,000
Common stock, shares outstanding	274,723	274,723
Dominion Gas Holdings, LLC
Customer receivables, allowance for doubtful accounts	4	4
Other receivables, allowance for doubtful accounts	$1	$1

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Operating Activities
Net income including noncontrolling interests	$540		$385
Net income	536		379
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization (including nuclear fuel)	414		378
Deferred income taxes and investment tax credits	277		232
Gains on the sale of assets and businesses	-70		-159
Other adjustments	-40		-34
Changes in:
Accounts receivable	-65		-183
Inventories	148		163
Deferred fuel and purchased gas costs, net	-33		-304
Accounts payable	-85		53
Accrued interest, payroll and taxes	-15		-55
Margin deposit assets and liabilities	111		105
Other operating assets and liabilities	-51		172
Net cash provided by operating activities	1,131		753
Investing Activities
Plant construction and other property additions (including nuclear fuel)	-1,014		-1,120
Acquisition of solar development projects	0		-47
Acquisition of DCGT	-495		0
Proceeds from sales of securities	337		442
Purchases of securities	-304		-441
Proceeds from the sale of electric retail energy marketing business	0		187
Proceeds from the sale of assets to Blue Racer	0		84
Proceeds from assignments of Marcellus acreage	27		0
Other	-50		-24
Net cash used in investing activities	-1,499		-919
Financing Activities
Issuance of short-term debt, net	425		45
Issuance of long-term debt	0		1,150
Repayment and repurchase of long-term debt	-3		-608
Subsidiary preferred stock redemption	0		-125
Issuance of common stock	295		0
Common dividend payments	-381		-349
Distributions to Dominion Midstream public unitholders	-3		0
Subsidiary preferred dividend payments	0		-4
Other	-8		-31
Net cash provided by financing activities	325		78
Decrease in cash and cash equivalents	-43		-88
Cash and cash equivalents at beginning of period	318	[1]	316
Cash and cash equivalents at end of period	275		228
Significant noncash investing activities:
Accrued capital expenditures	353		261
Virginia Electric and Power Company
Operating Activities
Net income	269		324
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization (including nuclear fuel)	281		263
Deferred income taxes and investment tax credits	67		203
Other adjustments	-7		-12
Changes in:
Accounts receivable	-20		-9
Inventories	85		91
Deferred fuel and purchased gas costs, net	-54		-328
Prepayments	214		-15
Accounts payable	3		34
Accrued interest, payroll and taxes	116		10
Other operating assets and liabilities	7		39
Net cash provided by operating activities	961		600
Investing Activities
Plant construction and other property additions (including nuclear fuel)	-583		-691
Purchases of nuclear fuel	-23		-68
Proceeds from sales of securities	133		204
Purchases of securities	-138		-215
Other	-11		-6
Net cash used in investing activities	-622		-776
Financing Activities
Issuance of short-term debt, net	227		-339
Issuance (repayment) of affiliated current borrowings, net	-417		62
Issuance of long-term debt	0		750
Subsidiary preferred stock redemption	0		-125
Common dividend payments	-149		-149
Subsidiary preferred dividend payments	0		-4
Other	1		-11
Net cash provided by financing activities	-338		184
Decrease in cash and cash equivalents	1		8
Cash and cash equivalents at beginning of period	15	[2]	16
Cash and cash equivalents at end of period	16		24
Significant noncash investing activities:
Accrued capital expenditures	139		203
Dominion Gas Holdings, LLC
Operating Activities
Net income	161		164
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization	51		47
Deferred income taxes and investment tax credits	36		27
Gains on the sale of assets and businesses	-70		-59
Other adjustments	3		-2
Changes in:
Accounts receivable	-24		-154
Deferred fuel and purchased gas costs, net	16		29
Prepayments	102		10
Accounts payable	-33		-16
Accrued interest, payroll and taxes	49		73
Other operating assets and liabilities	-18		-6
Net cash provided by operating activities	273		113
Investing Activities
Plant construction and other property additions (including nuclear fuel)	-128		-107
Proceeds from sale of assets to an affiliate	0		30
Proceeds from the sale of assets to Blue Racer	27		0
Other	-1		-2
Net cash used in investing activities	-102		-79
Financing Activities
Issuance of short-term debt, net	280		0
Issuance (repayment) of affiliated current borrowings, net	-345		51
Distribution payments	-95		-78
Other	-1		-1
Net cash provided by financing activities	-161		-28
Decrease in cash and cash equivalents	10		6
Cash and cash equivalents at beginning of period	9	[3]	8
Cash and cash equivalents at end of period	19		14
Significant noncash investing activities:
Accrued capital expenditures	22		24
Proceeds from sale of assets to affiliate not yet received	0		17
Extinguishment of affiliated long-term debt in exchange for assets sold to affiliate	$0		$67
[1]	Dominion’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[2]	Virginia Power’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[3]	Dominion Gas’ Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.

Nature_of_Operations

Nature of Operations	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of Operations
	Dominion, headquartered in Richmond, Virginia, is one of the nation’s largest producers and transporters of energy. Dominion’s operations are conducted through various subsidiaries, including Virginia Power and Dominion Gas. Virginia Power is a regulated public utility that generates, transmits and distributes electricity for sale in Virginia and northeastern North Carolina. Dominion Gas is a holding company that conducts business activities through a regulated interstate natural gas transmission pipeline and underground storage system in the Northeast, mid-Atlantic and Midwest states, regulated gas transportation and distribution operations in Ohio, and gas gathering and processing activities primarily in West Virginia, Ohio and Pennsylvania. Dominion Gas' wholly-owned subsidiaries are DTI, East Ohio and Dominion Iroquois.

Significant_Accounting_Policie

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies
	As permitted by the rules and regulations of the SEC, the Companies' accompanying unaudited Consolidated Financial Statements contain certain condensed financial information and exclude certain footnote disclosures normally included in annual audited consolidated financial statements prepared in accordance with GAAP. These unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Notes in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014.
	In the Companies' opinion, the accompanying unaudited Consolidated Financial Statements contain all adjustments necessary to present fairly their financial position as of March 31, 2015 and their results of operations and cash flows for the three months ended March 31, 2015 and 2014. Such adjustments are normal and recurring in nature unless otherwise noted.
	The Companies make certain estimates and assumptions in preparing their Consolidated Financial Statements in accordance with GAAP. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the periods presented. Actual results may differ from those estimates.
	The Companies' accompanying unaudited Consolidated Financial Statements include, after eliminating intercompany transactions and balances, their accounts and those of their respective majority-owned subsidiaries. As of March 31, 2015, Dominion owns the general partner and 68.5% of the limited partner interests in Dominion Midstream, which owns a preferred equity interest and the general partner interest in Cove Point. The public’s ownership interest in Dominion Midstream is reflected as non-controlling interest in Dominion’s Consolidated Financial Statements.
	The results of operations for interim periods are not necessarily indicative of the results expected for the full year. Information for quarterly periods is affected by seasonal variations in sales, rate changes, electric fuel and other energy-related purchases, purchased gas expenses and other factors.
	Certain amounts in the Companies' 2014 Consolidated Financial Statements and Notes have been reclassified to conform to the 2015 presentation for comparative purposes. The reclassifications did not affect the Companies’ net income, total assets, liabilities, equity or cash flows.
	Amounts disclosed for Dominion are inclusive of Virginia Power and/or Dominion Gas, where applicable.

Acquisitions_and_Dispositions

Acquisitions and Dispositions	3 Months Ended
	Mar. 31, 2015
Business Combinations, Discontinued Operations and Disposal Groups [Abstract]
Acquisitions and Dispositions	Acquisitions and Dispositions
	Dominion
	Acquisition of Solar Projects
	In March 2014, Dominion completed the acquisition of 100% of the equity interests of six solar development projects in California from Recurrent Energy Development Holdings, LLC for approximately $50 million in cash. The projects cost approximately $446 million to construct, including the initial acquisition cost. The facilities, which began commercial operations in the fourth quarter of 2014, generate approximately 139 MW.
	The purchase price for this acquisition was allocated to Property, Plant and Equipment.
	In April 2015, Dominion completed the acquisition of 100% of the equity interests of a solar project in California from EC&R NA Solar PV, LLC for approximately $66 million in cash. The project is expected to cost approximately $69 million once constructed, including the initial acquisition cost. Upon completion, the facility is expected to generate approximately 20 MW.
	In April 2015, Dominion also completed the acquisition of 100% of the equity interests of a solar project in California from EDF Renewable Development, Inc. for approximately $106 million in cash. The projects owned by the acquired company are expected to cost approximately $111 million once constructed, including the initial acquisition cost. Upon completion, the facilities are expected to generate approximately 24 MW.
	The allocation of the purchase price to individual assets for these investments is under evaluation by management and has not been finalized.
	Long-term power purchase, interconnection and operation and maintenance agreements have been executed for each of the projects. Dominion expects to claim federal investment tax credits on the projects.
	Acquisition of DCGT
	In January 2015, Dominion completed the acquisition of 100% of the equity interests of DCGT from SCANA Corporation for approximately $495 million in cash, subject to final working capital adjustments. DCGT owns and operates nearly 1,500 miles of FERC-regulated interstate natural gas pipeline in South Carolina and southeastern Georgia. This acquisition supports Dominion’s natural gas expansion into the Southeast. The allocation of the purchase price is currently being evaluated and has preliminarily resulted in approximately $277 million of net property, plant and equipment, $250 million of goodwill, of which approximately $225 million is expected to be deductible for income tax purposes, and approximately $38 million of regulatory liabilities. The goodwill reflects the value associated with enhancing Dominion's regulated gas position, economic value attributable to future expansion projects as well as increased opportunities for synergies. The acquired assets of DCGT are included in the Dominion Energy operating segment.
	On March 24, 2015, DCGT converted to a limited liability company under the laws of South Carolina and changed its name from Carolina Gas Transmission Corporation to DCGT. On April 1, 2015, Dominion contributed 100% of the issued and outstanding membership interests of DCGT to Dominion Midstream in exchange for total consideration of $495 million, subject to final working capital adjustments. Total consideration to Dominion consisted of the issuance of a two-year, approximately $295 million senior unsecured promissory note payable by Dominion Midstream at an annual interest rate of 0.6%, and 5,112,139 common units, valued at $200 million, representing limited partner interests in Dominion Midstream. The amount of the promissory note is subject to change to correspond with any working capital adjustments. The number of units was based on the volume weighted average trading price of Dominion Midstream's common units for the ten trading days prior to April 1, 2015, or $39.12 per unit. Since Dominion consolidates Dominion Midstream for financial reporting purposes, this transaction was eliminated upon consolidation and did not impact Dominion's financial position or cash flow.
	Sale of Electric Retail Energy Marketing Business
	In March 2014, Dominion completed the sale of its electric retail energy marketing business. The proceeds were approximately $187 million, net of transaction costs. The sale resulted in a gain, subject to post-closing adjustments, of approximately $100 million ($57 million after-tax) net of a $31 million write-off of goodwill, and is included in other operations and maintenance expense in Dominion's Consolidated Statements of Income. The sale of the electric retail energy marketing business did not qualify for discontinued operations classification.
	Dominion Gas
	Assignments of Marcellus Acreage
	In December 2013, DTI closed an agreement with a natural gas producer to convey over time approximately 79,000 acres of Marcellus Shale development rights underneath one of its natural gas storage fields. The agreement provided for payments to DTI, subject to customary adjustments, of up to approximately $200 million over a period of nine years, and an overriding royalty interest in gas produced from the acreage. In 2013, DTI received approximately $82 million in cash proceeds. During the twelve months ended December 31, 2014, DTI received $16 million in additional cash proceeds resulting from post-closing adjustments. At December 31, 2014, deferred revenue totaled approximately $85 million. In March 2015, DTI and the natural gas producer closed on an amendment to the agreement, which included the immediate conveyance of approximately 9,000 acres of Marcellus Shale development rights and a two year extension of the term of the original agreement. The conveyance of development rights resulted in the recognition of $43 million ($27 million after-tax) of previously deferred revenue to operations and maintenance expense in Dominion Gas' Consolidated Statements of Income. At March 31, 2015, deferred revenue totaled approximately $40 million, which is expected to be recognized over the remaining term of the agreement.
	In March 2015, DTI closed an agreement with a natural gas producer to convey approximately 11,000 acres of Marcellus Shale development rights underneath one of its natural gas storage fields. The agreement provided for a payment to DTI, subject to customary adjustments, of approximately $27 million, and an overriding royalty interest in gas produced from the acreage. In March 2015, DTI received proceeds of $27 million associated with the conveyance of the acreage, resulting in a $27 million ($16 million after-tax) gain, included in other operations and maintenance expense in Dominion Gas' Consolidated Statements of Income.
	Dominion and Dominion Gas
	Blue Racer
	See Note 10 for a discussion of transactions related to Blue Racer.

Operating_Revenue

Operating Revenue	3 Months Ended
	Mar. 31, 2015
Regulated and Unregulated Operating Revenue [Abstract]
Operating Revenue	Operating Revenue
	The Companies’ operating revenue consists of the following:
		Three Months Ended March 31,
		2015		2014
	(millions)
	Dominion
	Electric sales:
	Regulated	$	2,112	$	1,951
	Nonregulated	406		854
	Gas sales:
	Regulated	116		147
	Nonregulated	208		117
	Gas transportation and storage	471		444
	Other	96		117
	Total operating revenue	$	3,409	$	3,630
	Virginia Power
	Regulated electric sales	$	2,112	$	1,951
	Other	25		32
	Total operating revenue	$	2,137	$	1,983
	Dominion Gas
	Gas sales:
	Regulated	$	57	$	83
	Nonregulated	3		9
	Gas transportation and storage	412		396
	NGL revenue	29		57
	Other	30		24
	Total operating revenue	$	531	$	569

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	For continuing operations, including noncontrolling interests, the statutory U.S. federal income tax rate reconciles to the Companies' effective income tax rate as follows:
		Dominion				Virginia Power				Dominion Gas
	Three Months Ended March 31,	2015		2014		2015		2014		2015		2014
	U.S. statutory rate	35	%	35	%	35	%	35	%	35	%	35	%
	Increases (reductions) resulting from:
	State taxes, net of federal benefit	2.9		2.7		3.8		3.8		4		3.4
	Investment tax credits	(0.8	)	(3.6	)	—		—		—		—
	Production tax credits	(0.8	)	(0.6	)	(0.4	)	(0.8	)	—		—
	Other, net	(0.6	)	(0.8	)	(0.7	)	(0.2	)	(0.1	)	0.3
	Effective tax rate	35.7	%	32.7	%	37.7	%	37.8	%	38.9	%	38.7	%
	As of March 31, 2015, there have been no material changes in the Companies' unrecognized tax benefits or possible changes that could reasonably be expected to occur during the next twelve months. See Note 5 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014 for a discussion of these unrecognized tax benefits.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share
	The following table presents the calculation of Dominion’s basic and diluted EPS:
		Three Months Ended March 31,
		2015		2014
	(millions, except EPS)
	Net income attributable to Dominion	$	536	$	379
	Average shares of common stock outstanding – Basic	587.9		581.6
	Net effect of dilutive securities(1)	2		1.3
	Average shares of common stock outstanding – Diluted	589.9		582.9
	Earnings Per Common Share – Basic and Diluted	$	0.91	$	0.65
	-1	Dilutive securities consist primarily of the 2013 Equity Units for 2015 and contingently convertible senior notes and the 2013 Equity Units for 2014. See Note 14 in this report and Note 17 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014 for more information.
	The 2014 Equity Units are potentially dilutive securities but were excluded from the calculation of diluted EPS for the three months ended March 31, 2015, as the dilutive stock price threshold was not met. There were no potentially dilutive securities excluded from the calculation of diluted EPS for the three months ended March 31, 2014.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income
	Dominion
	The following table presents Dominion’s changes in AOCI by component, net of tax:
		Deferred gains and losses on derivatives-hedging activities			Unrealized gains and losses on investment securities			Unrecognized pension and other postretirement benefit costs			Other comprehensive income (loss) from equity method investee			Total
	(millions)
	Three Months Ended March 31, 2015
	Beginning balance	$	(178	)	$	548		$	(782	)	$	(4	)	$	(416	)
	Other comprehensive income before reclassifications: gains (losses)	(58		)	15			—			(1		)	(44		)
	Amounts reclassified from AOCI(1): (gains) losses	59			(21		)	13			—			51
	Net current-period other comprehensive income (loss)	1			(6		)	13			(1		)	7
	Ending balance	$	(177	)	$	542		$	(769	)	$	(5	)	$	(409	)
	Three Months Ended March 31, 2014
	Beginning balance	$	(288	)	$	474		$	(510	)	$	—		$	(324	)
	Other comprehensive income before reclassifications: gains (losses)	(150		)	29			(4		)	(7		)	(132		)
	Amounts reclassified from AOCI(1): (gains) losses	160			(11		)	8			—			157
	Net current-period other comprehensive income (loss)	10			18			4			(7		)	25
	Ending balance	$	(278	)	$	492		$	(506	)	$	(7	)	$	(299	)
	(1) See table below for details about these reclassifications.
	The following table presents Dominion’s reclassifications out of AOCI by component:
	Details about AOCI components	Amounts reclassified from AOCI			Affected line item in the Consolidated Statements of Income
	(millions)
	Three Months Ended March 31, 2015
	Deferred (gains) and losses on derivatives-hedging activities:
	Commodity contracts	$	92		Operating revenue
		5			Purchased gas
		(1		)	Electric fuel and other energy-related purchases
	Interest rate contracts	2			Interest and related charges
		98
	Tax	(39		)	Income tax expense
		$	59
	Unrealized (gains) and losses on investment securities:
	Realized (gain) loss on sale of securities	$	(39	)	Other income
	Impairment	6			Other income
		(33		)
	Tax	12			Income tax expense
		$	(21	)
	Unrecognized pension and other postretirement benefit costs:
	Prior service (credit) costs	$	(3	)	Other operations and maintenance
	Actuarial (gains) losses	25			Other operations and maintenance
		22
	Tax	(9		)	Income tax expense
		$	13
	Three Months Ended March 31, 2014
	Deferred (gains) and losses on derivatives-hedging activities:
	Commodity contracts	$	269		Operating revenue
		1			Purchased gas
		(13		)	Electric fuel and other energy-related purchases
	Interest rate contracts	3			Interest and related charges
		260
	Tax	(100		)	Income tax expense
		$	160
	Unrealized (gains) and losses on investment securities:
	Realized (gain) loss on sale of securities	$	(20	)	Other income
	Impairment	2			Other income
		(18		)
	Tax	7			Income tax expense
		$	(11	)
	Unrecognized pension and other postretirement benefit costs:
	Prior service (credit) costs	$	(3	)	Other operations and maintenance
	Actuarial (gains) losses	17			Other operations and maintenance
		14
	Tax	(6		)	Income tax expense
		$	8
	Dominion Gas
The following table presents Dominion Gas’ changes in AOCI by component, net of tax:
	Deferred gains and losses on derivatives-hedging activities			Unrecognized pension and other postretirement benefit costs			Total
(millions)
Three Months Ended March 31, 2015
Beginning balance	$	(20	)	$	(66	)	$	(86	)
Other comprehensive income before reclassifications: gains (losses)	(4		)	—			(4		)
Amounts reclassified from AOCI(1): (gains) losses	—			1			1
Net current-period other comprehensive income (loss)	(4		)	1			(3		)
Ending balance	$	(24	)	$	(65	)	$	(89	)
Three Months Ended March 31, 2014
Beginning balance	$	3		$	(61	)	$	(58	)
Other comprehensive income before reclassifications: gains (losses)	(8		)	—			(8		)
Amounts reclassified from AOCI(1): (gains) losses	5			1			6
Net current-period other comprehensive income (loss)	(3		)	1			(2		)
Ending balance	$	—		$	(60	)	$	(60	)
-1	See table below for details about these reclassifications.
The following table presents Dominion Gas' reclassifications out of AOCI by component:
Details about AOCI components	Amounts reclassified from AOCI			Affected line item in the Consolidated Statements of Income
(millions)
Three Months Ended March 31, 2015
Unrecognized pension and other postretirement benefit costs:
Actuarial (gains) losses	$	2		Other operations and maintenance
	2
Tax	(1		)	Income tax expense
	$	1
Three Months Ended March 31, 2014
Deferred (gains) and losses on derivatives-hedging activities:
Commodity contracts	$	6		Operating revenue
	2			Purchased gas
	8
Tax	(3		)	Income tax expense
	$	5
Unrecognized pension and other postretirement benefit costs:
Actuarial (gains) losses	$	2		Other operations and maintenance
	2
Tax	(1		)	Income tax expense
	$	1

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	The Companies' fair value measurements are made in accordance with the policies discussed in Note 6 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014. See Note 9 in this report for further information about the Companies' derivatives and hedge accounting activities.
	The Companies enter into certain physical and financial forwards, futures, options and swaps, which are considered Level 3 as they have one or more inputs that are not observable and are significant to the valuation. The discounted cash flow method is used to value Level 3 physical and financial forwards and futures contracts. An option model is used to value Level 3 physical and financial options. The discounted cash flow model for forwards and futures calculates mark-to-market valuations based on forward market prices, original transaction prices, volumes, risk-free rate of return, and credit spreads. The option model calculates mark-to-market valuations using variations of the Black-Scholes option model. The inputs into the models are the forward market prices, implied price volatilities, risk-free rate of return, the option expiration dates, the option strike prices, the original sales prices, and volumes. For Level 3 fair value measurements, forward market prices, credit spreads and implied price volatilities are considered unobservable. The unobservable inputs are developed and substantiated using historical information, available market data, third-party data, and statistical analysis. Periodically, inputs to valuation models are reviewed and revised as needed, based on historical information, updated market data, market liquidity and relationships, and changes in third-party pricing sources.
	The following table presents Dominion's quantitative information about Level 3 fair value measurements at March 31, 2015. The range and weighted average are presented in dollars for market price inputs and percentages for credit spreads and price volatility.
		Fair Value (millions)			Valuation Techniques	Unobservable Input		Range	Weighted Average(1)
	Assets:
	Physical and Financial Forwards and Futures:
	Natural Gas(2)	$	85		Discounted Cash Flow	Market Price (per Dth)	(3)	(2) - 6	(1	)
						Credit spread	(4)	1% - 5%	2	%
	FTRs	4			Discounted Cash Flow	Market Price (per MWh)	(3)	(5) - 7	1
	Physical and Financial Options:
	Natural Gas	5			Option Model	Market Price (per Dth)	(3)	4-Feb	3
						Price Volatility	(5)	21% - 76%	32	%
	Total assets	$	94
	Liabilities:
	Physical and Financial Forwards and Futures:
	Natural Gas(2)	$	12		Discounted Cash Flow	Market Price (per Dth)	(3)	(2) - 4	2
	FTRs	4			Discounted Cash Flow	Market Price (per MWh)	(3)	(2) - 5	1
	Physical and Financial Options:
	Natural Gas	2			Option Model	Market Price (per Dth)	(3)	4-Feb	3
						Price Volatility	(5)	21% - 76%	32	%
	Total liabilities	$	18
	-1	Averages weighted by volume.
	-2	Includes basis.
	-3	Represents market prices beyond defined terms for Levels 1 and 2.
	-4	Represents credit spreads unrepresented in published markets.
	-5	Represents volatilities unrepresented in published markets.
	Sensitivity of the fair value measurements to changes in the significant unobservable inputs is as follows:
	Significant Unobservable Inputs	Position	Change to Input	Impact on Fair Value Measurement
	Market Price	Buy	Increase (decrease)	Gain (loss)
	Market Price	Sell	Increase (decrease)	Loss (gain)
	Price Volatility	Buy	Increase (decrease)	Gain (loss)
	Price Volatility	Sell	Increase (decrease)	Loss (gain)
	Credit spread	Asset	Increase (decrease)	Loss (gain)
	Recurring Fair Value Measurements
	Dominion
	The following table presents Dominion’s assets and liabilities that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions:
		Level 1			Level 2			Level 3			Total
	(millions)
	At March 31, 2015
	Assets:
	Derivatives:
	Commodity	$	3		$	564		$	94		$	661
	Interest rate	—			18			—			18
	Investments(1):
	Equity securities:
	U.S.:
	Large cap	2,647			—			—			2,647
	Other	7			—			—			7
	Non-U.S.:
	Large cap	12			—			—			12
	Fixed income:
	Corporate debt instruments	—			462			—			462
	U.S. Treasury securities and agency debentures	407			187			—			594
	State and municipal	—			423			—			423
	Other	—			130			—			130
	Cash equivalents and other	1			4			—			5
	Total assets	$	3,077		$	1,788		$	94		$	4,959
	Liabilities:
	Derivatives:
	Commodity	$	3		$	437		$	18		$	458
	Interest rate	—			307			—			307
	Total liabilities	$	3		$	744		$	18		$	765
	At December 31, 2014
Assets:
Derivatives:
Commodity	$	3		$	567		$	125		$	695
Interest rate	—			24			—			24
Investments(1):
Equity securities:
U.S.:
Large cap	2,669			—			—			2,669
Other	6			—			—			6
Non-U.S.:
Large cap	12			—			—			12
Fixed income:
Corporate debt instruments	—			441			—			441
U.S. Treasury securities and agency debentures	419			190			—			609
State and municipal	—			395			—			395
Other	—			74			—			74
Cash equivalents and other	3			10			—			13
Total assets	$	3,112		$	1,701		$	125		$	4,938
Liabilities:
Derivatives:
Commodity	$	3		$	571		$	18		$	592
Interest rate	—			202			—			202
Total liabilities	$	3		$	773		$	18		$	794
-1	Includes investments held in the nuclear decommissioning and rabbi trusts.
The following table presents the net change in Dominion's assets and liabilities measured at fair value on a recurring basis and included in the Level 3 fair value category:
	Three Months Ended March 31,
	2015			2014
(millions)
Beginning balance	$	107		$	(16	)
Total realized and unrealized gains (losses):
Included in earnings	15			110
Included in other comprehensive income (loss)	(11		)	4
Included in regulatory assets/liabilities	(24		)	17
Settlements	(14		)	(108		)
Transfers out of Level 3(1)	3			1
Ending balance	$	76		$	8
The amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	$	—		$	1
-1	In March 2015, Dominion changed the classification of NGL derivatives from Level 3 to Level 2 due to an increase in liquidity in financial forward markets. At March 31, 2015, $9 million of the transfers out of Level 3 relate to NGLs.
The following table presents Dominion's classification of gains and losses included in earnings in the Level 3 fair value category:
	Operating			Electric fuel			Total
	revenue			and other
				energy-related
				purchases
(millions)
Three Months Ended March 31, 2015
Total gains (losses) included in earnings	$	2		$	13		$	15
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	—			—			—
Three Months Ended March 31, 2014
Total gains (losses) included in earnings	$	(10	)	$	120		$	110
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	1			—			1
Virginia Power
The following table presents Virginia Power's quantitative information about Level 3 fair value measurements at March 31, 2015. The range and weighted average are presented in dollars for market price inputs and percentages for credit spreads.
	Fair Value (millions)			Valuation Techniques	Unobservable Input		Range	Weighted Average(1)
Assets:
Physical and Financial Forwards and Futures:
FTRs	$	4		Discounted Cash Flow	Market Price (per MWh)	(3)	(5) - 7	1
Natural Gas(2)	78			Discounted Cash Flow	Market Price (per Dth)	(3)	(2) - 3	(1	)
					Credit spread	(4)	1% - 5%	2	%
Total assets	$	82
Liabilities:
Physical and Financial Forwards and Futures:
FTRs	$	4		Discounted Cash Flow	Market Price (per MWh)	(3)	(2) - 5	1
Total liabilities	$	4
-1	Averages weighted by volume.
-2	Includes basis.
-3	Represents market prices beyond defined terms for Levels 1 and 2.
-4	Represents credit spreads unrepresented in published markets.
Sensitivity of the fair value measurements to changes in the significant unobservable inputs is as follows:
Significant Unobservable Inputs	Position	Change to Input	Impact on Fair Value Measurement
Market Price	Buy	Increase (decrease)	Gain (loss)
Market Price	Sell	Increase (decrease)	Loss (gain)
Credit spread	Asset	Increase (decrease)	Loss (gain)
The following table presents Virginia Power’s assets and liabilities that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions:
	Level 1			Level 2			Level 3			Total
(millions)
At March 31, 2015
Assets:
Derivatives:
Commodity	$	—		$	24		$	82		$	106
Investments(1):
Equity securities:
U.S. large cap	1,166			—			—			1,166
Fixed income:
Corporate debt instruments	—			258			—			258
U.S. Treasury securities and agency debentures	129			63			—			192
State and municipal	—			224			—			224
Other	—			31			—			31
Total assets	$	1,295		$	600		$	82		$	1,977
Liabilities:
Derivatives:
Commodity	$	—		$	7		$	4		$	11
Interest rate	—			128			—			128
Total liabilities	$	—		$	135		$	4		$	139
At December 31, 2014
Assets:
Derivatives:
Commodity	$	—		$	7		$	106		$	113
Investments(1):
Equity securities:
U.S. large cap	1,157			—			—			1,157
Fixed income:
Corporate debt instruments	—			250			—			250
U.S. Treasury securities and agency debentures	137			61			—			198
State and municipal	—			211			—			211
Other	—			23			—			23
Total assets	$	1,294		$	552		$	106		$	1,952
Liabilities:
Derivatives:
Commodity	$	—		$	11		$	4		$	15
Interest rate	—			72			—			72
Total liabilities	$	—		$	83		$	4		$	87
-1	Includes investments held in the nuclear decommissioning and rabbi trusts.
The following table presents the net change in Virginia Power’s assets and liabilities measured at fair value on a recurring basis and included in the Level 3 fair value category:
	Three Months Ended March 31,
	2015			2014
(millions)
Beginning balance	$	102		$	(7	)
Total realized and unrealized gains (losses):
Included in earnings	14			120
Included in regulatory assets/liabilities	(24		)	17
Settlements	(14		)	(120		)
Ending balance	$	78		$	10
The gains and losses included in earnings in the Level 3 fair value category were classified in electric fuel and other energy-related purchases in Virginia Power's Consolidated Statements of Income for the three months ended March 31, 2015 and 2014. There were no unrealized gains or losses included in earnings in the Level 3 fair value category relating to assets/liabilities still held at the reporting date for the three months ended March 31, 2015 and 2014.
Dominion Gas
The following table presents Dominion Gas' assets and liabilities for derivatives that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions:
	Level 1			Level 2			Level 3			Total
(millions)
At March 31, 2015
Assets:
Commodity	$	—		$	3		$	—		$	3
Total Assets	$	—		$	3		$	—		$	3
Liabilities:
Commodity	$	—		$	3		$	—		$	3
Interest rate	—			13			—			13
Total liabilities	$	—		$	16		$	—		$	16
At December 31, 2014
Assets:
Commodity	$	—		$	—		$	2		$	2
Total Assets	$	—		$	—		$	2		$	2
Liabilities:
Interest rate	$	—		$	9		$	—		$	9
Total liabilities	$	—		$	9		$	—		$	9
The following table presents the net change in Dominion Gas' assets and liabilities for derivatives measured at fair value on a recurring basis and included in the Level 3 fair value category:
	Three Months Ended March 31,
	2015			2014
(millions)
Beginning balance	$	2		$	(6	)
Total realized and unrealized gains (losses):
Included in earnings	1			(5		)
Included in other comprehensive income (loss)	(11		)	4
Settlements	(1		)	5
Transfers out of Level 3(1)	9			—
Ending balance	$	—		$	(2	)
-1	In March 2015, Dominion changed the classification of NGL derivatives from Level 3 to Level 2 due to an increase in liquidity in financial forward markets. At March 31, 2015, $9 million of the transfers out of Level 3 relate to NGLs.
The gains and losses included in earnings in the Level 3 fair value category were classified in operating revenue in Dominion Gas' Consolidated Statements of Income for the three months ended March 31, 2015 and 2014. There were no unrealized gains or losses included in earnings in the Level 3 fair value category relating to assets/liabilities still held at the reporting date for the three months ended March 31, 2015 and 2014.
Fair Value of Financial Instruments
Substantially all of the Companies' financial instruments are recorded at fair value, with the exception of the instruments described below, which are reported at historical cost. Estimated fair values have been determined using available market information and valuation methodologies considered appropriate by management. The carrying amount of cash and cash equivalents, restricted cash (which is recorded in other current assets) customer and other receivables, short-term debt, affiliated current borrowings, payables to affiliates and accounts payable are representative of fair value because of the short-term nature of these instruments. For the Companies' financial instruments that are not recorded at fair value, the carrying amounts and estimated fair values are as follows:
	31-Mar-15						31-Dec-14
	Carrying			Estimated Fair			Carrying			Estimated Fair
	Amount			Value(1)			Amount			Value(1)
(millions)
Dominion
Long-term debt, including securities due within one year(2)(3)	$	19,718		$	22,197		$	19,723		$	21,881
Junior subordinated notes(3)	1,373			1,405			1,374			1,396
Remarketable subordinated notes(3)	2,084			2,206			2,083			2,362
Virginia Power
Long-term debt, including securities due within one year(3)	$	8,936		$	10,441		$	8,937		$	10,293
Dominion Gas
Long-term debt(3)	$	2,594		$	2,720		$	2,594		$	2,672
-1	Fair value is estimated using market prices, where available, and interest rates currently available for issuance of debt with similar terms and remaining maturities. All fair value measurements are classified as Level 2. The carrying amount of debt issues with short-term maturities and variable rates refinanced at current market rates is a reasonable estimate of their fair value.
-2	At March 31, 2015 and December 31, 2014, includes the valuation of certain fair value hedges associated with fixed rate debt of approximately $15 million and $19 million, respectively.
-3	Carrying amount includes amounts which represent the unamortized discount and/or premium.

Derivatives_and_Hedge_Accounti

Derivatives and Hedge Accounting Activities	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedge Accounting Activities	Derivatives and Hedge Accounting Activities
	The Companies' accounting policies and objectives and strategies for using derivative instruments are discussed in Note 2 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014. See Note 8 in this report for further information about fair value measurements and associated valuation methods for derivatives.
	Derivative assets and liabilities are presented gross on the Companies' Consolidated Balance Sheets. Dominion's derivative contracts include both over-the-counter transactions and those that are executed on an exchange or other trading platform (exchange contracts) and centrally cleared. Dominion Gas' and Virginia Power's derivative contracts consist of over-the-counter transactions. Over-the-counter contracts are bilateral contracts that are transacted directly with a counterparty. Exchange contracts utilize a financial intermediary, exchange, or clearinghouse to enter, execute, or clear the transactions. Certain over-the-counter and exchange contracts contain contractual rights of setoff through master netting arrangements, derivative clearing agreements, and contract default provisions. In addition, the contracts are subject to conditional rights of setoff through counterparty nonperformance, insolvency, or other conditions.
	In general, most over-the-counter transactions and all exchange contracts are subject to collateral requirements. Types of collateral for over-the-counter and exchange contracts include cash, letters of credit, and in some cases other forms of security, none of which are subject to restrictions. Cash collateral is used in the table below to offset derivative assets and liabilities. Certain accounts receivable and accounts payable recognized on the Companies' Consolidated Balance Sheets, as well as letters of credit and other forms of security, all of which are not included in the tables below, are subject to offset under master netting or similar arrangements and would reduce the net exposure.
	Dominion
	Balance Sheet Presentation
	The tables below present Dominion's derivative asset and liability balances by type of financial instrument, before and after the effects of offsetting:
		31-Mar-15									31-Dec-14
		Gross Amounts of Recognized Assets			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Assets Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets Presented in the Consolidated Balance Sheet
	(millions)
	Interest rate contracts:
	Over-the-counter	$	18		$	—		$	18		$	24	$	—	$	24
	Commodity contracts:
	Over-the-counter	323			—			323			382		—		382
	Exchange	326			—			326			298		—		298
	Total derivatives, subject to a master netting or similar arrangement	667			—			667			704		—		704
	Total derivatives, not subject to a master netting or similar arrangement	12			—			12			15		—		15
	Total	$	679		$	—		$	679		$	719	$	—	$	719
					31-Mar-15										31-Dec-14
					Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
		Net Amounts of Assets Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Received			Net Amounts		Net Amounts of Assets Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amounts
	(millions)
	Interest rate contracts:
	Over-the-counter	$	18		$	18		$	—		$	—	$	24	$	16	$	—	$	8
	Commodity contracts:
	Over-the-counter	323			45			—			278		382		34		34		314
	Exchange	326			326			—			—		298		298		—		—
	Total	$	667		$	389		$	—		$	278	$	704	$	348	$	34	$	322
		31-Mar-15									31-Dec-14
		Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet
	(millions)
	Interest rate contracts:
	Over-the-counter	$	307		$	—		$	307		$	202	$	—	$	202
	Commodity contracts:
	Over-the-counter	83			—			83			87		—		87
	Exchange	364			—			364			493		—		493
	Total derivatives, subject to a master netting or similar arrangement	754			—			754			782		—		782
	Total derivatives, not subject to a master netting or similar arrangement	11			—			11			12		—		12
	Total	$	765		$	—		$	765		$	794	$	—	$	794
					31-Mar-15										31-Dec-14
					Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Paid			Net Amounts		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Paid		Net Amounts
	(millions)
	Interest rate contracts:
	Over-the-counter	$	307		$	18		$	—		$	289	$	202	$	16	$	—	$	186
	Commodity contracts:
	Over-the-counter	83			45			—			38		87		34		1		52
	Exchange	364			326			38			—		493		298		195		—
	Total	$	754		$	389		$	38		$	327	$	782	$	348	$	196	$	238
	Volumes
	The following table presents the volume of Dominion’s derivative activity as of March 31, 2015. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions, except in the case of offsetting transactions, for which they represent the absolute value of the net volume of their long and short positions.
		Current			Noncurrent
	Natural Gas (bcf):
	Fixed price(1)	55			10
	Basis	224			558
	Electricity (MWh):
	Fixed price	13,610,507			7,505,325
	FTRs	14,994,541			—
	Capacity (MW)	15,250			3,050
	Liquids (Gal)(2)	77,280,000			2,016,000
	Interest rate	$	2,550,000,000		$	4,000,000,000
	-1	Includes options.
	-2	Includes NGLs and oil.
	Ineffectiveness and AOCI
For the three months ended March 31, 2015 and 2014, gains or losses on hedging instruments determined to be ineffective and amounts excluded from the assessment of effectiveness were not material. Amounts excluded from the assessment of effectiveness include gains or losses attributable to changes in the time value of options and changes in the differences between spot prices and forward prices.
The following table presents selected information related to gains (losses) on cash flow hedges included in AOCI in Dominion’s Consolidated Balance Sheet at March 31, 2015:
	AOCI			Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax			Maximum Term
	After-Tax
(millions)
Commodities:
Gas	$	(5	)	$	(5	)	25 months
Electricity	89			32			21 months
Other	—			(1		)	14 months
Interest rate	(261		)	(6		)	393 months
Total	$	(177	)	$	20
The amounts that will be reclassified from AOCI to earnings will generally be offset by the recognition of the hedged transactions (e.g., anticipated sales) in earnings, thereby achieving the realization of prices contemplated by the underlying risk management strategies and will vary from the expected amounts presented above as a result of changes in market prices and interest rates.
Fair Value and Gains and Losses on Derivative Instruments
The following table presents the fair values of Dominion’s derivatives and where they are presented in its Consolidated Balance Sheets:
	Fair Value –			Fair Value –			Total Fair Value
	Derivatives under			Derivatives not under
	Hedge			Hedge
	Accounting			Accounting
(millions)
At March 31, 2015
ASSETS
Current Assets
Commodity	$	298		$	109		$	407
Interest rate	13			—			13
Total current derivative assets(1)	311			109			420
Noncurrent Assets
Commodity	140			114			254
Interest rate	5			—			5
Total noncurrent derivative assets(2)	145			114			259
Total derivative assets	$	456		$	223		$	679
LIABILITIES
Current Liabilities
Commodity	$	253		$	118		$	371
Interest rate	229			—			229
Total current derivative liabilities	482			118			600
Noncurrent Liabilities
Commodity	48			39			87
Interest Rate	78			—			78
Total noncurrent derivative liabilities(3)	126			39			165
Total derivative liabilities	$	608		$	157		$	765
At December 31, 2014
ASSETS
Current Assets
Commodity	$	281		$	242		$	523
Interest rate	13			—			13
Total current derivative assets(1)	294			242			536
Noncurrent Assets
Commodity	71			101			172
Interest rate	11			—			11
Total noncurrent derivative assets(2)	82			101			183
Total derivative assets	$	376		$	343		$	719
LIABILITIES
Current Liabilities
Commodity	$	224		$	267		$	491
Interest rate	100			—			100
Total current derivative liabilities	324			267			591
Noncurrent Liabilities
Commodity	55			46			101
Interest rate	102			—			102
Total noncurrent derivative liabilities(3)	157			46			203
Total derivative liabilities	$	481		$	313		$	794
-1	Current derivative assets are presented in other current assets in Dominion's Consolidated Balance Sheets.
-2	Noncurrent derivative assets are presented in other deferred charges and other assets in Dominion’s Consolidated Balance Sheets.
-3	Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Dominion’s Consolidated Balance Sheets.
The following tables present the gains and losses on Dominion's derivatives, as well as where the associated activity is presented in its Consolidated Balance Sheets and Statements of Income:
Derivatives in cash flow hedging relationships	Amount of Gain			Amount of Gain			Increase
	(Loss)			(Loss) Reclassified			(Decrease) in
	Recognized			from AOCI to			Derivatives
	in AOCI  on			Income			Subject to
	Derivatives						Regulatory
	(Effective						Treatment(2)
	Portion)(1)
(millions)
Three Months Ended March 31, 2015
Derivative Type and Location of Gains (Losses)
Commodity:
Operating revenue				$	(92	)
Purchased gas				(5		)
Electric fuel and other energy-related purchases				1
Total commodity	$	(41	)	$	(96	)	$	3
Interest rate(3)	(58		)	(2		)	(49		)
Total	$	(99	)	$	(98	)	$	(46	)
Three Months Ended March 31, 2014
Derivative Type and Location of Gains (Losses)
Commodity:
Operating revenue				$	(269	)
Purchased gas				(1		)
Electric fuel and other energy-related purchases				13
Total commodity	$	(183	)	$	(257	)	$	2
Interest rate(3)	(47		)	(3		)	(23		)
Total	$	(230	)	$	(260	)	$	(21	)
-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.
	Amount of Gain (Loss) Recognized in Income on Derivatives(1)
	Three Months Ended March 31,
Derivatives not designated as hedging instruments	2015			2014
(millions)
Derivative Type and Location of Gains (Losses)
Commodity
Operating revenue	$	3		$	(361	)
Purchased gas	(2		)	7
Electric fuel and other energy-related purchases	6			133
Total	$	7		$	(221	)
-1	Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Dominion’s Consolidated Statements of Income.
Virginia Power
Balance Sheet Presentation
The tables below present Virginia Power's derivative asset and liability balances by type of financial instrument, before and after the effects of offsetting:
	31-Mar-15									31-Dec-14
	Gross Amounts of Recognized Assets			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Assets Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets Presented in the Consolidated Balance Sheet
(millions)
Commodity contracts:
Over-the-counter	$	82		$	—		$	82		$	106	$	—	$	106
Total derivatives, subject to a master netting or similar arrangement	82			—			82			106		—		106
Total derivatives, not subject to a master netting or similar arrangement	24			—			24			7		—		7
Total	$	106		$	—		$	106		$	113	$	—	$	113
				31-Mar-15										31-Dec-14
				Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
	Net Amounts of Assets Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Received			Net Amounts		Net Amounts of Assets Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amounts
(millions)
Commodity contracts:
Over-the-counter	$	82		$	4		$	—		$	78	$	106	$	4	$	—	$	102
Total	$	82		$	4		$	—		$	78	$	106	$	4	$	—	$	102
	31-Mar-15									31-Dec-14
	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet
(millions)
Interest rate contracts:
Over-the-counter	$	128		$	—		$	128		$	72	$	—	$	72
Commodity contracts:
Over-the-counter	5			—			5			8		—		8
Total derivatives, subject to a master netting or similar arrangement	133			—			133			80		—		80
Total derivatives, not subject to a master netting or similar arrangement	6			—			6			7		—		7
Total	$	139		$	—		$	139		$	87	$	—	$	87
				31-Mar-15										31-Dec-14
				Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
	Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Paid			Net Amounts		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Paid		Net Amounts
(millions)
Interest rate contracts:
Over-the-counter	$	128		$	—		$	—		$	128	$	72	$	—	$	—	$	72
Commodity contracts:
Over-the-counter	5			4			—			1		8		4		—		4
Total	$	133		$	4		$	—		$	129	$	80	$	4	$	—	$	76
Volumes
The following table presents the volume of Virginia Power’s derivative activity as of March 31, 2015. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions, except in the case of offsetting transactions, for which they represent the absolute value of the net volume of their long and short positions.
	Current			Noncurrent
Natural Gas (bcf):
Fixed price(1)	12			—
Basis	84			493
Electricity (MWh):
FTRs	13,486,569			—
Capacity (MW)	15,250			3,050
Interest rate	$	1,000,000,000		$	750,000,000
-1	Includes options.
Ineffectiveness
For the three months ended March 31, 2015 and 2014, gains or losses on hedging instruments determined to be ineffective were not material.
Fair Value and Gains and Losses on Derivative Instruments
The following table presents the fair values of Virginia Power’s derivatives and where they are presented in its Consolidated
Balance Sheets:
	Fair Value –			Fair Value –			Total Fair Value
	Derivatives under			Derivatives not under
	Hedge			Hedge
	Accounting			Accounting
(millions)
At March 31, 2015
ASSETS
Current Assets
Commodity	$	—		$	28		$	28
Total current derivative assets(1)	—			28			28
Noncurrent Assets
Commodity	—			78			78
Total noncurrent derivative assets(2)	—			78			78
Total derivative assets	$	—		$	106		$	106
LIABILITIES
Current Liabilities
Commodity	$	1		$	10		$	11
Interest rate	96			—			96
Total current derivative liabilities(3)	97			10			107
Noncurrent Liabilities
Interest rate	32			—			32
Total noncurrent derivatives liabilities (4)	32			—			32
Total derivative liabilities	$	129		$	10		$	139
31-Dec-14
ASSETS
Current Assets
Commodity	$	—		$	51		$	51
Total current derivative assets(1)	—			51			51
Noncurrent Assets
Commodity	—			62			62
Total noncurrent derivative assets(2)	—			62			62
Total derivative assets	$	—		$	113		$	113
LIABILITIES
Current Liabilities
Commodity	$	3		$	12		$	15
Interest rate	45			—			45
Total current derivative liabilities(3)	48			12			60
Noncurrent Liabilities
Interest rate	27			—			27
Total noncurrent derivative liabilities(4)	27			—			27
Total derivative liabilities	$	75		$	12		$	87
-1	Current derivative assets are presented in other current assets in Virginia Power's Consolidated Balance Sheets.
-2	Noncurrent derivative assets are presented in other deferred charges and other assets in Virginia Power's Consolidated Balance Sheets.
-3	Current derivative liabilities are presented in other current liabilities in Virginia Power's Consolidated Balance Sheets.
-4	Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Virginia Power’s Consolidated Balance Sheets.
The following tables present the gains and losses on Virginia Power's derivatives, as well as where the associated activity is presented in its Consolidated Balance Sheets and Statements of Income:
Derivatives in cash flow hedging relationships	Amount of Gain			Amount of Gain			Increase
	(Loss)			(Loss) Reclassified			(Decrease) in
	Recognized			from AOCI to			Derivatives
	in AOCI  on			Income			Subject to
	Derivatives						Regulatory
	(Effective						Treatment(2)
	Portion)(1)
(millions)
Three Months Ended March 31, 2015
Derivative Type and Location of Gains (Losses)
Commodity:
Electric fuel and other energy-related purchases				$	(1	)
Total commodity	$	—		$	(1	)	$	3
Interest rate(3)	(6		)	—			(49		)
Total	$	(6	)	$	(1	)	$	(46	)
Three Months Ended March 31, 2014
Derivative Type and Location of Gains (Losses)
Commodity:
Electric fuel and other energy-related purchases				$	5
Total commodity	$	6		$	5		$	2
Interest rate(3)	(3		)	—			(23		)
Total	$	3		$	5		$	(21	)
-1	Amounts deferred into AOCI have no associated effect in Virginia Power’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 Virginia Power’s Consolidated Statements of Income.
-3	Amounts recorded in Virginia Power’s Consolidated Statements of Income are classified in interest and related charges.
	Amount of Gain (Loss) Recognized in Income on Derivatives(1)
	Three Months Ended March 31,
Derivatives not designated as hedging instruments	2015			2014
(millions)
Derivative Type and Location of Gains (Losses)
Commodity(2)	$	7		$	119
Total	$	7		$	119
-1	Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Virginia Power’s Consolidated Statements of Income.
-2	Amounts recorded in Virginia Power's Consolidated Statements of Income are classified in electric fuel and other energy-related purchases.
Dominion Gas
Balance Sheet Presentation
The tables below present Dominion Gas' derivative asset and liability balances by type of financial instrument, before and after the effects of offsetting.
	31-Mar-15									31-Dec-14
	Gross Amounts of Recognized Assets			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Assets Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets Presented in the Consolidated Balance Sheet
(millions)
Commodity contracts:
Over-the-counter	$	3		$	—		$	3		$	2	$	—	$	2
Total derivatives, subject to a master netting or similar arrangement	$	3		$	—		$	3		$	2	$	—	$	2
				31-Mar-15										31-Dec-14
				Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
	Net Amounts of Assets Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Received			Net Amounts		Net Amounts of Assets Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amounts
(millions)
Commodity contracts:
Over-the-counter	$	3		$	3		$	—		$	—	$	2	$	—	$	—	$	2
Total	$	3		$	3		$	—		$	—	$	2	$	—	$	—	$	2
	31-Mar-15									31-Dec-14
	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet
(millions)
Interest rate contracts:
Over-the-counter	$	13		$	—		$	13		$	9	$	—	$	9
Commodity contracts:
Over-the-counter	3			—			3			—		—		—
Total derivatives, subject to a master netting or similar arrangement	$	16		$	—		$	16		$	9	$	—	$	9
				31-Mar-15										31-Dec-14
				Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
	Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Paid			Net Amounts		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Paid		Net Amounts
(millions)
Interest rate contracts:
Over-the-counter	$	13		$	—		$	—		$	13	$	9	$	—	$	—	$	9
Commodity contracts:
Over-the-counter	3			3			—			—		—		—		—		—
Total	$	16		$	3		$	—		$	13	$	9	$	—	$	—	$	9
Volumes
The following table presents the volume of Dominion Gas' derivative activity as of March 31, 2015. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions, except in the case of offsetting transactions, for which they represent the absolute value of the net volume of their long and short positions.
	Current			Noncurrent
Natural Gas (bcf):
Fixed price	7			—
Basis	8			—
NGLs (Gal)	72,912,000			—
Interest rate	$	—		$	250,000,000
Ineffectiveness and AOCI
For the three months ended March 31, 2015 and 2014, gains or losses on hedging instruments determined to be ineffective were not material.
The following table presents selected information related to losses on cash flow hedges included in AOCI in Dominion Gas' Consolidated Balance Sheet at March 31, 2015:
	AOCI			Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax			Maximum
	After-Tax						Term
(millions)
Commodities:
NGLs	$	(1	)	$	—		12 months
Interest rate	(23		)	—			357 months
Total	$	(24	)	$	—
The amounts that will be reclassified from AOCI to earnings will generally be offset by the recognition of the hedged transactions (e.g., anticipated sales) in earnings, thereby achieving the realization of prices contemplated by the underlying risk management strategies and will vary from the expected amounts presented above as a result of changes in market prices and interest rates.
Fair Value and Gains and Losses on Derivative Instruments
The following tables present the fair values of Dominion Gas' commodity and interest rate derivatives and where they are presented in its Consolidated Balance Sheets:
	Fair Value  -			Fair Value -			Total
	Derivatives			Derivatives			Fair
	under			not under			Value
	Hedge			Hedge
	Accounting			Accounting
(millions)
At March 31, 2015
ASSETS
Current Assets
Commodity	$	2		$	1		$	3
Total current derivative assets(1)	2			1			3
Total derivative assets	$	2		$	1		$	3
LIABILITIES
Current Liabilities
Commodity	$	3		$	—		$	3
Total current derivative liabilities(2)	3			—			3
Noncurrent Liabilities
Interest rate	13			—			13
Total noncurrent derivative liabilities(3)	13			—			13
Total derivative liabilities	$	16		$	—		$	16
At December 31, 2014
ASSETS
Current Assets
Commodity	$	2		$	—		$	2
Total current derivative assets(1)	2			—			2
Total derivative assets	$	2		$	—		$	2
LIABILITIES
Noncurrent Liabilities
Interest rate	$	9		$	—		$	9
Total noncurrent derivative liabilities(3)	9			—			9
Total derivative liabilities	$	9		$	—		$	9
-1	Current derivative assets are presented in other current assets in Dominion Gas' Consolidated Balance Sheets.
-2	Current derivative liabilities are presented in other current liabilities in Dominion Gas' Consolidated Balance Sheets.
-3	Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Dominion Gas’ Consolidated Balance Sheets.
The following table presents the gains and losses on Dominion Gas' derivatives, as well as where the associated activity is presented in its Consolidated Balance Sheets and Statements of Income:
Derivatives in cash flow hedging relationships	Amount of			Amount of
	Gain (Loss)			Gain (Loss)
	Recognized			Reclassified
	in AOCI on			from AOCI
	Derivatives			to Income
	(Effective
	Portion)(1)
(millions)
Three Months Ended March 31, 2015
Derivative Type and Location of Gains (Losses)
Commodity
Operating revenue				$	—
Total commodity	$	(2	)	$	—
Interest rate(2)	(4		)	—
Total	$	(6	)	$	—
Three Months Ended March 31, 2014
Derivative Type and Location of Gains (Losses)
Commodity
Operating revenue				$	(6	)
Purchased gas				(2		)
Total commodity	$	1		$	(8	)
Interest rate(2)	(14		)	—
Total	$	(13	)	$	(8	)
-1	Amounts deferred into AOCI have no associated effect in Dominion Gas' Consolidated Statements of Income.
-2	Amounts recorded in Dominion Gas' Consolidated Statements of Income are classified in interest and related charges.

Investments

Investments	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Investments	Investments
	Dominion
	Equity and Debt Securities
	Rabbi Trust Securities
	Marketable equity and debt securities and cash equivalents held in Dominion’s rabbi trusts and classified as trading totaled $116 million and $110 million at March 31, 2015 and December 31, 2014, respectively. Cost method investments held in Dominion’s rabbi trusts totaled $6 million at both March 31, 2015 and December 31, 2014.
	Decommissioning Trust Securities
	Dominion holds marketable equity and debt securities (classified as available-for-sale), cash equivalents and cost method investments in nuclear decommissioning trust funds to fund future decommissioning costs for its nuclear plants. Dominion’s decommissioning trust funds are summarized below:
		Amortized			Total  Unrealized Gains(1)			Total  Unrealized				Fair Value
		Cost						Losses(1)
	(millions)
	31-Mar-15
	Marketable equity securities:
	U.S. large cap	$	1,265		$	1,338		$	—			$	2,603
	Marketable debt securities:
	Corporate bonds	440			23			(1		)		462
	U.S. Treasury securities and agency debentures	576			17			(1		)		592
	State and municipal	356			24			—				380
	Other	122			—			—				122
	Cost method investments	77			—			—				77
	Cash equivalents and other(2)	8			—			—				8
	Total	$	2,844		$	1,402		$	(2	)	(3)	$	4,244
	December 31, 2014
	Marketable equity securities:
	U.S. large cap	$	1,273		$	1,353		$	—			$	2,626
	Marketable debt securities:
	Corporate bonds	424			19			(2		)		441
	U.S. Treasury securities and agency debentures	597			13			(4		)		606
	State and municipal	332			23			—				355
	Other	66			—			—				66
	Cost method investments	86			—			—				86
	Cash equivalents and other(2)	16			—			—				16
	Total	$	2,794		$	1,408		$	(6	)	(3)	$	4,196
	-1	Included in AOCI and the nuclear decommissioning trust regulatory liability.
	-2	Includes pending sales of securities of $3 million at both March 31, 2015 and December 31, 2014.
	-3	The fair value of securities in an unrealized loss position was $239 million and $379 million at March 31, 2015 and December 31, 2014, respectively.
	The fair value of Dominion’s marketable debt securities held in nuclear decommissioning trust funds at March 31, 2015 by contractual maturity is as follows:
		Amount
	(millions)
	Due in one year or less	$	233
	Due after one year through five years	383
	Due after five years through ten years	435
	Due after ten years	505
	Total	$	1,556
	Presented below is selected information regarding Dominion’s marketable equity and debt securities held in nuclear decommissioning trust funds.
		Three Months Ended March 31,
		2015			2014
	(millions)
	Proceeds from sales	$	337		$	442
	Realized gains(1)	56			38
	Realized losses(1)	17			6
	-1	Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.
	Other-than-temporary impairment losses on investments held in nuclear decommissioning trust funds for Dominion were not material for the three months ended March 31, 2015 and 2014.
	Virginia Power
	Virginia Power holds marketable equity and debt securities (classified as available-for-sale), cash equivalents and cost method investments in nuclear decommissioning trust funds to fund future decommissioning costs for its nuclear plants. Virginia Power’s decommissioning trust funds are summarized below:
		Amortized			Total  Unrealized			Total  Unrealized				Fair Value
		Cost			Gains(1)			Losses(1)
	(millions)
	31-Mar-15
	Marketable equity securities:
	U.S. large cap	$	573		$	592		$	—			$	1,165
	Marketable debt securities:
	Corporate bonds	247			11			—				258
	U.S. Treasury securities and agency debentures	190			3			(1		)		192
	State and municipal	209			14			—				223
Other	31			—			—				31
Cost method investments	77			—			—				77
Cash equivalents and other(2)	4			—			—				4
Total	$	1,331		$	620		$	(1	)	(3)	$	1,950
December 31, 2014
Marketable equity securities:
U.S. large cap	$	563		$	594		$	—			$	1,157
Marketable debt securities:
Corporate bonds	242			9			(1		)		250
U.S. Treasury securities and agency debentures	197			3			(2		)		198
State and municipal	197			13			—				210
Other	23			—			—				23
Cost method investments	86			—			—				86
Cash equivalents and other(2)	6			—			—				6
Total	$	1,314		$	619		$	(3	)	(3)	$	1,930
-1	Included in AOCI and the nuclear decommissioning trust regulatory liability.
-2	Includes pending sales of securities of $4 million and $6 million at March 31, 2015 and December 31, 2014, respectively.
-3	The fair value of securities in an unrealized loss position was $120 million and $170 million at March 31, 2015 and December 31, 2014, respectively.
The fair value of Virginia Power’s marketable debt securities at March 31, 2015 by contractual maturity is as follows:
	Amount
(millions)
Due in one year or less	$	51
Due after one year through five years	168
Due after five years through ten years	245
Due after ten years	240
Total	$	704
Presented below is selected information regarding Virginia Power’s marketable equity and debt securities.
	Three Months Ended March 31,
	2015			2014
(millions)
Proceeds from sales	$	133		$	204
Realized gains(1)	18			19
Realized losses(1)	11			3
-1	Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.
Other-than-temporary impairment losses on investments held in nuclear decommissioning trust funds for Virginia Power were not material for the three months ended March 31, 2015 and 2014.
Equity Method Investments
Dominion Gas
Dominion Gas accounts for the following investment under the equity method of accounting:
Company	Ownership%		Investment Balance						Description
			31-Mar-15			31-Dec-14
(millions)
Iroquois	24.72	%	$	103		$	107		Gas transmission system
Total			$	103		$	107
Dominion Gas' equity earnings on this investment totaled $8 million for both the three months ended March 31, 2015 and 2014. Dominion Gas received distributions from this investment of $12 million and $5 million for the three months ended March 31, 2015 and 2014, respectively. As of March 31, 2015 and December 31, 2014, the carrying amount of Dominion Gas' investment exceeded its share of underlying equity in net assets by approximately $8 million. The differences reflect equity method goodwill and are not being amortized.
Dominion and Dominion Gas
Blue Racer
In December 2012, Dominion formed Blue Racer with Caiman to provide midstream services to natural gas producers operating in the Utica Shale region in Ohio and portions of Pennsylvania. Blue Racer is an equal partnership between Dominion and Caiman, with Dominion contributing midstream assets and Caiman contributing private equity capital.
Dominion NGL Pipelines, LLC was contributed in January 2014 by Dominion to Blue Racer, prior to commencement of service, resulting in an increased equity method investment of $155 million, including $6 million of goodwill allocated from Dominion's goodwill balance to its equity method investment in Blue Racer.
In March 2014, Dominion Gas sold the Northern System to an affiliate, that subsequently sold the Northern System to Blue Racer for consideration of approximately $84 million. Dominion Gas' consideration consisted of $17 million in cash proceeds and the extinguishment of affiliated long-term debt of $67 million and Dominion's consideration consisted of cash proceeds of approximately $84 million. The sale resulted in a gain of approximately $59 million ($35 million after-tax for Dominion Gas and $34 million after-tax for Dominion) net of a $3 million write-off of goodwill, and is included in other operations and maintenance expense in both Dominion Gas' and Dominion's Consolidated Statements of Income.

Regulatory_Assets_and_Liabilit

Regulatory Assets and Liabilities	3 Months Ended
	Mar. 31, 2015
Regulatory Assets and Liabilities Disclosure [Abstract]
Regulatory Assets and Liabilities	Regulatory Assets and Liabilities
	Regulatory assets and liabilities include the following:
		31-Mar-15		31-Dec-14
	(millions)
	Dominion
	Regulatory assets:
	Deferred cost of fuel used in electric generation(1)	$	122	$	79
	Deferred rate adjustment clause costs(2)	108		124
	Deferred nuclear refueling outage costs(3)	57		44
	Unrecovered gas costs(4)	16		36
	Other	59		64
	Regulatory assets-current(5)	362		347
	Unrecognized pension and other postretirement benefit costs(6)	1,034		1,050
	Deferred rate adjustment clause costs(2)	216		250
	Derivatives(7)	150		101
	Income taxes recoverable through future rates(8)	136		133
	Other	129		108
	Regulatory assets-non-current	1,665		1,642
	Total regulatory assets	$	2,027	$	1,989
	Regulatory liabilities:
	PIPP(9)	$	63	$	71
	Other	43		99
	Regulatory liabilities-current(10)	106		170
	Provision for future cost of removal and AROs(11)	1,100		1,072
	Nuclear decommissioning trust(12)	822		815
	Other	197		104
	Regulatory liabilities-non-current	2,119		1,991
	Total regulatory liabilities	$	2,225	$	2,161
	Virginia Power
	Regulatory assets:
	Deferred cost of fuel used in electric generation(1)	$	122	$	79
	Deferred rate adjustment clause costs(2)	106		117
	Deferred nuclear refueling outage costs(3)	57		44
	Other	54		58
	Regulatory assets-current	339		298
	Deferred rate adjustment clause costs(2)	141		179
	Derivatives(7)	150		101
	Income taxes recoverable through future rates(8)	103		100
	Other	70		59
	Regulatory assets-non-current	464		439
	Total regulatory assets	$	803	$	737
	Regulatory liabilities:
	Other	$	23	$	90
	Regulatory liabilities-current(10)	23		90
	Provision for future cost of removal(11)	864		852
	Nuclear decommissioning trust(12)	822		815
	Other	83		16
	Regulatory liabilities-non-current	1,769		1,683
	Total regulatory liabilities	$	1,792	$	1,773
	Dominion Gas
	Regulatory assets:
	Unrecovered gas costs(4)	$	13	$	29
	Deferred rate adjustment clause costs(2)	2		7
	Other	1		2
	Regulatory assets-current(5)	16		38
	Unrecognized pension and other postretirement benefit costs(6)	239		242
	Deferred rate adjustment clause costs(2)	75		71
	Income taxes recoverable through future rates(8)	24		24
	Other	52		42
	Regulatory assets-non-current	390		379
	Total regulatory assets	$	406	$	417
	Regulatory liabilities:
	PIPP(9)	$	63	$	71
	Other	16		4
Regulatory liabilities-current(10)	79		75
Provision for future cost of removal and AROs(11)	172		172
Other	26		20
Regulatory liabilities-non-current(13)	198		192
Total regulatory liabilities	$	277	$	267
-1	Primarily reflects deferred fuel expenses for the Virginia jurisdiction of Virginia Power's generation operations. See Note 12 for more information.
-2	Reflects deferrals under the electric transmission FERC formula rate and the deferral of costs associated with certain current and prospective rider projects for Virginia Power. Reflects deferrals of costs associated with certain current and prospective rider projects for Dominion Gas. See Note 12 for more information.
-3	Legislation enacted in Virginia in April 2014 requires Virginia Power to defer operation and maintenance costs incurred in connection with the refueling of any nuclear-powered generating plant. These deferred costs will be amortized over the refueling cycle, not to exceed 18 months.
-4	Reflects unrecovered gas costs at regulated gas operations, which are recovered through filings with the applicable regulatory authority.
-5	Current regulatory assets are presented in other current assets in Dominion's and Dominion Gas' Consolidated Balance Sheets.
-6	Represents unrecognized pension and other postretirement employee benefit costs expected to be recovered through future rates generally over the expected remaining service period of plan participants by certain of Dominion's and Dominion Gas' rate-regulated subsidiaries.
-7	For jurisdictions subject to cost-based rate regulation, changes in the fair value of derivative instruments result in the recognition of regulatory assets or regulatory liabilities as they are expected to be recovered from or refunded to customers.
-8	Amounts to be recovered through future rates to pay income taxes that become payable when rate revenue is provided to recover AFUDC-equity and depreciation of property, plant and equipment for which deferred income taxes were not recognized for ratemaking purposes, including amounts attributable to tax rate changes.
-9	Under PIPP, eligible customers can make reduced payments based on their ability to pay. The difference between the customer's total bill and the PIPP plan amount is deferred and collected or returned annually under the PIPP rider according to East Ohio tariff provisions.
-10	Current regulatory liabilities are presented in other current liabilities in the Companies' Consolidated Balance Sheets.
-11	Rates charged to customers by the Companies' regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement.
-12	Primarily reflects a regulatory liability representing amounts collected from Virginia jurisdictional customers and placed in external trusts (including income, losses and changes in fair value thereon) for the future decommissioning of Virginia Power's utility nuclear generation stations, in excess of the related AROs.
-13	Noncurrent regulatory liabilities are presented in other deferred credits and other liabilities in Dominion Gas' Consolidated Balance Sheets.
At March 31, 2015, approximately $129 million of Dominion's, $97 million of Virginia Power's and $30 million of Dominion Gas' regulatory assets represented past expenditures on which they do not currently earn a return. These expenditures are expected to be recovered within the next two years.

Regulatory_Matters

Regulatory Matters	3 Months Ended
	Mar. 31, 2015
Regulatory Matters [Abstract]
Regulatory Matters	Regulatory Matters
	Regulatory Matters Involving Potential Loss Contingencies
	As a result of issues generated in the ordinary course of business, the Companies are involved in various regulatory matters. Certain regulatory matters may ultimately result in a loss; however, as such matters are in an initial procedural phase, involve uncertainty as to the outcome of pending reviews or orders, and/or involve significant factual issues that need to be resolved, it is not possible for the Companies to estimate a range of possible loss. For matters for which the Companies cannot estimate a range of possible loss, a statement to this effect is made in the description of the matter. Other matters may have progressed sufficiently through the regulatory process such that the Companies are able to estimate a range of possible loss. For regulatory matters for which the Companies are able to reasonably estimate a range of possible losses, an estimated range of possible loss is provided, in excess of the accrued liability (if any) for such matters. Any estimated range is based on currently available information, involves elements of judgment and significant uncertainties and may not represent the Companies' maximum possible loss exposure. The circumstances of such regulatory matters will change from time to time and actual results may vary significantly from the current estimate. For current matters not specifically reported below, management does not anticipate that the outcome from such matters would have a material effect on the Companies' financial position, liquidity or results of operations.
	FERC - Electric
	Under the Federal Power Act, FERC regulates wholesale sales and transmission of electricity in interstate commerce by public utilities. Dominion's merchant generators sell electricity in the PJM, MISO and ISO-NE wholesale markets under Dominion's market-based sales tariffs authorized by FERC. Virginia Power purchases and, under its FERC market-based rate authority, sells electricity in the wholesale market. In addition, Virginia Power has FERC approval of a tariff to sell wholesale power at capped rates based on its embedded cost of generation. This cost-based sales tariff could be used to sell to loads within or outside Virginia Power's service territory. Any such sales would be voluntary.
	Rates
	In April 2008, FERC granted an application for Virginia Power's electric transmission operations to establish a forward-looking formula rate mechanism that updates transmission rates on an annual basis and approved an ROE of 11.4%, effective as of January 1, 2008. The formula rate is designed to recover the expected revenue requirement for each calendar year and is updated based on actual costs. The FERC-approved formula method, which is based on projected costs, allows Virginia Power to earn a current return on its growing investment in electric transmission infrastructure.
	In March 2010, ODEC and NCEMC filed a complaint with FERC against Virginia Power claiming that approximately $223 million in transmission costs related to specific projects were unjust, unreasonable and unduly discriminatory or preferential and should be excluded from Virginia Power's transmission formula rate. In October 2010, FERC issued an order dismissing the complaint in part and established hearings and settlement procedures on the remaining part of the complaint. In February 2012, Virginia Power submitted to FERC a settlement agreement to resolve all issues set for hearing. The settlement was accepted by FERC in May 2012 and provides for payment by Virginia Power to the transmission customer parties collectively of $250,000 per year for ten years and resolves all matters other than allocation of the incremental cost of certain underground transmission facilities.
	In March 2014, FERC issued an order excluding from Virginia Power’s transmission rates for wholesale transmission customers located outside Virginia the incremental costs of undergrounding certain transmission line projects.  FERC found it is not just and reasonable for non-Virginia wholesale transmission customers to be allocated the incremental costs of undergrounding the facilities because the projects are a direct result of Virginia legislation and Virginia Commission pilot programs intended to benefit the citizens of Virginia. The order is retroactively effective as of March 2010 and will cause the reallocation of the costs charged to wholesale transmission customers with loads outside Virginia to wholesale transmission customers with loads in Virginia.  FERC determined that there was not sufficient evidence on the record to determine the magnitude of the underground increment and ordered a hearing to determine the appropriate amount of undergrounding cost to be allocated to each wholesale transmission customer in Virginia. While Virginia Power cannot predict the outcome of the hearing, it is not expected to have a material effect on results of operations.
	Other Regulatory Matters
	Other than the following matters, there have been no significant developments regarding the pending regulatory matters disclosed in Note 13 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014.
	Virginia Regulation
	2015 Biennial Review
	In March 2015, Virginia Power filed its base rate case and schedules for the Virginia Commission’s 2015 biennial review of Virginia Power’s rates, terms and conditions. Per legislation enacted in February 2015, this biennial review is limited to reviewing Virginia Power’s earnings on rates for generation and distribution services for the combined 2013 and 2014 test period, and determining whether credits are due to customers in the event Virginia Power’s earnings exceeded the earnings band determined in the 2013 Biennial Review Order. Virginia Power’s filing demonstrated a 10.13% ROE for the combined test periods, which is within the earnings band. This case is pending.
	Virginia Fuel Expenses
	In February 2015, Virginia Power submitted its annual fuel factor filing to the Virginia Commission to recover an estimated $1.6 billion in Virginia jurisdictional projected fuel expenses for the rate year beginning July 1, 2015. Virginia Power’s new fuel rate, approved on an interim basis effective April 1, 2015, represents a fuel revenue decrease of approximately $512 million when applied to projected kilowatt-hour sales for the period April 1, 2015 to June 30, 2016. This case is pending. As a result of the legislation enacted in February 2015, Virginia Power recognized a charge of $85 million ($52 million after-tax) in electric fuel and other energy-related purchases in its Consolidated Statements of Income to write off 50% of its December 31, 2014 deferred fuel costs attributable to customers in Virginia.
	Rate Adjustment Clauses
	Below is a discussion of significant riders associated with various Virginia Power projects:
	•	The Virginia Commission previously approved Rider S in conjunction with the Virginia City Hybrid Energy Center. In March 2015, the Virginia Commission approved an approximately $245 million revenue requirement for the rate year beginning April 1, 2015.
	•	The Virginia Commission previously approved Rider BW in conjunction with Brunswick County. In April 2015, the Virginia Commission approved an approximately $111 million total revenue requirement for the rate year beginning September 1, 2015.
	•	The Virginia Commission previously approved Rider R in conjunction with Bear Garden. In March 2015, the Virginia Commission approved an approximately $84 million revenue requirement for the rate year beginning April 1, 2015.
	•	The Virginia Commission previously approved Riders C1A and C2A in connection with cost recovery for DSM programs. In April 2015, the Virginia Commission approved an approximately $37 million revenue requirement for the rate year beginning May 1, 2015.  The Virginia Commission approved two new energy efficiency programs for a three-year period with a combined cost cap of approximately $20 million, and reduced Virginia Power’s annual base rate revenues by approximately $7 million to remove the costs of a discontinued energy efficiency program no longer combined in Virginia Power’s base rates effective May 1, 2015.
	•	The Virginia Commission previously approved Rider B in conjunction with the conversion of three power stations to biomass. In March 2015, the Virginia Commission approved an approximately $9 million revenue requirement for the rate year beginning April 1, 2015.
	Electric Transmission Project
	In April 2015, the Supreme Court of Virginia issued its opinion in the consolidated appeals of the Virginia Commission’s order granting a CPCN for the Skiffes Creek transmission line and related facilities. The Supreme Court of Virginia unanimously affirmed on all but one of the alleged grounds for appeal. The court approved the proposed project including the proposed route for a 500 kV overhead transmission line from Surry Power Station to the Skiffes Creek Switching Station site. The court reversed and remanded the Virginia Commission’s determination in one set of appeals that the Skiffes Creek Switching Station was a transmission line for purposes of statutory exemption from local zoning ordinances. On April 27, 2015, Virginia Power and the Virginia Commission each filed a Notice of Intent to Apply for Rehearing with the Supreme Court of Virginia relating to the ruling on the switching station. This matter is pending.
	North Anna
	Virginia Power is considering the construction of a third nuclear unit at a site located at North Anna. If Virginia Power decides to build a new unit, it must first receive a COL from the NRC, approval of the Virginia Commission and certain environmental permits and other approvals. The COL is expected in 2016. Virginia Power has not yet committed to building a new nuclear unit at North Anna.
	In September 2014, BREDL filed a petition with the NRC again seeking suspension of final decision making in the COL proceeding, along with motions to reopen and file a new contention. BREDL asserted that the NRC must make a safety finding on the feasibility and capacity of geologic disposal of spent fuel prior to the issuance of a license. BREDL also alleged that because these safety findings are no longer made as part of the NRC’s new continued storage rule, such findings must now be made in individual licensing proceedings. In January 2015, BREDL filed another petition asking the NRC to supplement the final environmental impact statement for North Anna 3 to incorporate the NRC’s generic assessment of the impacts of continued spent fuel storage, which would allow BREDL to then challenge that assessment.
	The NRC denied the September 2014 petition and motions filed by BREDL in February 2015 and the January 2015 petition filed by BREDL in April 2015. In April 2015, BREDL filed a new motion and petition seeking to object to the NRC’s reliance on the continued storage rule in licensing proceedings. The BREDL filings are substantially the same as those filed in other COL proceedings in which final environmental impact statements were issued prior to promulgation of the continued storage rule, like North Anna 3. Resolution of these filings is not expected to affect the schedule for issuance of the COL.
	Ohio Regulation
	PIR Program
	In March 2015, East Ohio filed an application with the Ohio Commission requesting approval to extend the PIR program for an additional five years and to increase the annual capital investment, with corresponding increases in the annual rate-increase caps.  In its application, East Ohio proposed that PIR investments for 2016 should fall under the existing authorization and that the new five-year period should include investment through December 31, 2021. East Ohio also proposed that the PIR investment should be increased by $20 million in 2017 and another $20 million in 2018, bringing the total annual investment to $200 million. Thereafter, East Ohio proposed capital investment increases of 3% per year for 2019 through 2021 to mitigate inflation and other cost pressures experienced to date, which will continue into the future. This case is pending.
	In February 2015, East Ohio filed an application to adjust the PIR cost recovery for 2014 costs. The filing reflects gross plant investment for 2014 of $155 million, cumulative gross plant investment of $829 million and a revenue requirement of $108 million. This application was approved by the Ohio Commission in April 2015.
	AMR Program
	In February 2015, East Ohio filed its application with the Ohio Commission to adjust its AMR cost recovery charge to recover costs for calendar year 2014 associated with AMR deployment, which was completed in 2012. The filing reflects a projected revenue requirement of approximately $8 million. This application was approved by the Ohio Commission in April 2015.

Variable_Interest_Entities

Variable Interest Entities	3 Months Ended
	Mar. 31, 2015
Variable Interest Entities [Abstract]
Variable Interest Entities	Variable Interest Entities
	As discussed in Note 15 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014, certain variable pricing terms in some of the Companies’ contracts cause them to be considered variable interests in the counterparties.
	Virginia Power
	Virginia Power has long-term power and capacity contracts with five non-utility generators with an aggregate summer generation capacity of approximately 870 MW. These contracts contain certain variable pricing mechanisms in the form of partial fuel reimbursement that Virginia Power considers to be variable interests. After an evaluation of the information provided by these entities, Virginia Power was unable to determine whether they were VIEs. However, the information they provided, as well as Virginia Power's knowledge of generation facilities in Virginia, enabled Virginia Power to conclude that, if they were VIEs, it would not be the primary beneficiary. This conclusion reflects Virginia Power's determination that its variable interests do not convey the power to direct the most significant activities that impact the economic performance of the entities during the remaining terms of Virginia Power's contracts and for the years the entities are expected to operate after its contractual relationships expire. The contracts expire at various dates ranging from 2015 to 2021. Virginia Power is not subject to any risk of loss from these potential VIEs other than its remaining purchase commitments which totaled $585 million as of March 31, 2015. Virginia Power paid $53 million and $56 million for electric capacity and $37 million and $54 million for electric energy to these entities in the three months ended March 31, 2015 and 2014, respectively.
	Virginia Power and Dominion Gas
	Virginia Power and Dominion Gas purchased shared services from DRS, an affiliated VIE, of approximately $83 million and $28 million, and $83 million and $26 million for the three months ended March 31, 2015 and 2014, respectively. Virginia Power and Dominion Gas determined that each is not the most closely associated entity with DRS and therefore neither is the primary beneficiary. DRS provides accounting, legal, finance and certain administrative and technical services to all Dominion subsidiaries, including Virginia Power and Dominion Gas. Virginia Power and Dominion Gas have no obligation to absorb more than their allocated shares of DRS costs.

Significant_Financing_Transact

Significant Financing Transactions	3 Months Ended
	Mar. 31, 2015
Securities Financing Transactions Disclosures [Abstract]
Significant Financing Transactions	Significant Financing Transactions
	Credit Facilities and Short-term Debt
	The Companies use short-term debt to fund working capital requirements and as a bridge to long-term debt financings. The levels of borrowing may vary significantly during the course of the year, depending upon the timing and amount of cash requirements not satisfied by cash from operations. In addition, Dominion utilizes cash and letters of credit to fund collateral requirements. Collateral requirements are impacted by commodity prices, hedging levels, Dominion’s credit ratings and the credit quality of its counterparties.
	Dominion
	At March 31, 2015, Dominion’s commercial paper and letters of credit outstanding, as well as its capacity available under credit facilities, were as follows:
		Facility		Outstanding		Outstanding		Facility
		Limit		Commercial		Letters of		Capacity
				Paper		Credit		Available
	(millions)
	Joint revolving credit facility(1)	$	4,000	$	3,112	$	—	$	888
	Joint revolving credit facility(2)	500		88		48		364
	Total	$	4,500	$	3,200	$	48	$	1,252
	-1	This credit facility has a maturity date of April 2019, and 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	This credit facility has a maturity date of April 2019, and can be used to support bank borrowings, commercial paper and letter of credit issuances.
	Virginia Power
	Virginia Power’s short-term financing is supported by two joint revolving credit facilities with Dominion and Dominion Gas. These credit facilities are being used for working capital, as support for the combined commercial paper programs of the Companies and for other general corporate purposes.
	At March 31, 2015, Virginia Power’s share of commercial paper and letters of credit outstanding, as well as its capacity available under its joint credit facilities with Dominion and Dominion Gas, were as follows:
		Facility		Outstanding		Outstanding		Facility
		Sub-limit		Commercial		Letters of		Sub-limit Capacity
				Paper		Credit		Available
	(millions)
	Joint revolving credit facility(1)	$	1,500	$	1,500	$	—	$	—
	Joint revolving credit facility(2)	250		88		—		162
	Total	$	1,750	$	1,588	$	—	$	162
	-1	This credit facility has a maturity date of April 2019, and 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. In January 2015, Virginia Power increased its sub-limit from $1.25 billion to $1.50 billion.
	-2	This credit facility has a maturity date of April 2019, and 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.
	In addition to the credit facility commitments mentioned above, Virginia Power also has a $120 million credit facility with a maturity date of April 2019. As of March 31, 2015, this facility supports approximately $119 million of certain variable rate tax-exempt financings of Virginia Power.
	Dominion Gas
	Dominion Gas’ short-term financing is supported by the two joint revolving credit facilities discussed above with Dominion and Virginia Power, to which Dominion Gas was added as a borrower in May 2014. In December 2014, Dominion Gas entered into a commercial paper program pursuant to which it began accessing the commercial paper markets in January 2015.
	At March 31, 2015, Dominion Gas' share of commercial paper and letters of credit outstanding, as well as its capacity available under its joint credit facilities with Dominion and Virginia Power were as follows:
		Facility		Outstanding		Outstanding		Facility
		Sub-limit		Commercial		Letters of		Sub-limit Capacity
				Paper		Credit		Available
	(millions)
	Joint revolving credit facility(1)	$	500	$	280	$	—	$	220
	Joint revolving credit facility(2)	—		—		—		—
	Total	$	500	$	280	$	—	$	220
	-1	This credit facility has a maturity date of April 2019, and 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. Dominion Gas' current sub-limit under this credit facility can be increased or decreased multiple times per year, up to a maximum of $1.0 billion.
	-2	This credit facility has a maturity date of April 2019, and can be used to support bank borrowings, commercial paper and letter of credit issuances. Dominion Gas' current sub-limit under this credit facility can be increased or decreased multiple times per year.
	Issuance of Common Stock
	Dominion maintains Dominion Direct® and a number of employee savings plans through which contributions may be invested in Dominion’s common stock. These shares may either be newly issued or purchased on the open market with proceeds contributed to these plans. In January 2014, Dominion began purchasing its common stock on the open market for these plans. In April 2014, Dominion began issuing new common shares for these direct stock purchase plans.
	In December 2014, Dominion filed an SEC shelf registration for the sale of debt and equity securities including the ability to sell common stock through an at-the-market program. Also in December 2014, Dominion entered into four separate sales agency agreements to effect sales under the program and pursuant to which it may offer from time to time up to $500 million aggregate amount of its common stock. Sales of common stock can be made by means of privately negotiated transactions, as transactions on the NYSE at market prices or in such other transactions as are agreed upon by Dominion and the sales agents and in conformance with applicable securities laws. During the first quarter of 2015, Dominion provided sales instructions to two of the sales agents and issued 2.9 million shares through at-the-market issuances and received cash proceeds of approximately $219 million, net of fees and commissions paid of approximately $2 million. In April 2015, Dominion issued approximately 600 thousand shares through at-the-market issuances and received cash proceeds of approximately $43 million, net of fees and commissions paid of less than $1 million. Following these issuances, Dominion has the ability to issue up to approximately $235 million of stock under the 2014 sales agency agreements.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	As a result of issues generated in the ordinary course of business, the Companies are involved in legal proceedings before various courts and are periodically subject to governmental examinations (including by regulatory authorities), inquiries and investigations. Certain legal proceedings and governmental examinations involve demands for unspecified amounts of damages, are in an initial procedural phase, involve uncertainty as to the outcome of pending appeals or motions, or involve significant factual issues that need to be resolved, such that it is not possible for the Companies to estimate a range of possible loss. For such matters for which the Companies cannot estimate a range of possible loss, a statement to this effect is made in the description of the matter. Other matters may have progressed sufficiently through the litigation or investigative processes such that the Companies are able to estimate a range of possible loss. For legal proceedings and governmental examinations for which the Companies are able to reasonably estimate a range of possible losses, an estimated range of possible loss is provided, in excess of the accrued liability (if any) for such matters. Any accrued liability is recorded on a gross basis with a receivable also recorded for any probable insurance recoveries. Estimated ranges of loss are inclusive of legal fees and net of any anticipated insurance recoveries. Any estimated range is based on currently available information and involves elements of judgment and significant uncertainties. Any estimated range of possible loss may not represent the Companies' maximum possible loss exposure. The circumstances of such legal proceedings and governmental examinations will change from time to time and actual results may vary significantly from the current estimate. For current proceedings not specifically reported below, management does not anticipate that the liabilities, if any, arising from such proceedings would have a material effect on the financial position, liquidity or results of operations of the Companies.
	Environmental Matters
	The Companies are subject to costs resulting from a number of federal, state and local laws and regulations designed to protect human health and the environment. These laws and regulations affect future planning and existing operations. They can result in increased capital, operating and other costs as a result of compliance, remediation, containment and monitoring obligations.
	Air
	The CAA, as amended, is a comprehensive program utilizing a broad range of regulatory tools to protect and preserve the nation's air quality. At a minimum, states are required to establish regulatory programs to address all requirements of the CAA. However, states may choose to develop regulatory programs that are more restrictive. Many of the Companies' facilities are subject to the CAA's permitting and other requirements.
	In December 2011, the EPA issued MATS for coal and oil-fired electric utility steam generating units. The rule establishes strict emission limits for mercury, particulate matter as a surrogate for toxic metals and hydrogen chloride as a surrogate for acid gases. The rule includes a limited use provision for oil-fired units with annual capacity factors under 8% that provides an exemption from emission limits, and allows compliance with operational work practice standards. Compliance was required by April 16, 2015, with certain limited exceptions. However, in June 2014, the VDEQ granted a one-year MATS compliance extension for two coal-fired units at Yorktown to defer planned retirements and allow for continued operation of the units to address reliability concerns while necessary electric transmission upgrades are being completed. Due to delays in transmission upgrades needed to maintain electric reliability, these coal units will need to continue operating until early 2017.  Therefore, Virginia Power plans to request from the EPA an additional one year compliance extension under an EPA Administrative Order.
	The EPA established CAIR with the intent to require significant reductions in SO2 and NOx emissions from electric generating facilities. In July 2008, the U.S. Court of Appeals for the D.C. Circuit issued a ruling vacating CAIR. In December 2008, the Court denied rehearing, but also issued a decision to remand CAIR to the EPA. In July 2011, the EPA issued a replacement rule for CAIR, called CSAPR, that required 28 states to reduce power plant emissions that cross state lines. CSAPR established new SO2 and NOx emissions cap and trade programs that were completely independent of the current ARP. Specifically, CSAPR required reductions in SO2 and NOx emissions from fossil fuel-fired electric generating units of 25 MW or more through annual NOx emissions caps, NOx emissions caps during the ozone season (May 1 through September 30) and annual SO2 emission caps with differing requirements for two groups of affected states.
	Following numerous petitions by industry participants for review and a successful motion for stay, in October 2014, the U.S. Court of Appeals for the D.C. Circuit ordered that the EPA's motion to lift the stay of CSAPR be granted. Further, the Court granted the EPA's request to shift the CSAPR compliance deadlines by three years, so that Phase 1 emissions budgets (which would have gone into effect in 2012 and 2013) will apply in 2015 and 2016, and Phase 2 emissions budgets will apply in 2017 and beyond. CSAPR replaced CAIR beginning in January 2015. The cost to comply is not expected to be material to the Consolidated Financial Statements. Future outcomes of any additional litigation and/or any action to issue a revised rule could affect the assessment regarding cost of compliance.
	In May 2012, the EPA issued final designations for the 75-ppb ozone air quality standard. A number of the Companies' facilities are located in areas impacted by this standard. As part of the standard, states will be required to develop and implement plans to address sources emitting pollutants which contribute to the formation of ozone. In November 2014, the EPA issued a new proposal to revise the ozone standard and expects to finalize the rule in October 2015. The EPA is not expected to complete attainment designations for a new standard until 2017 and states will have until 2020 to develop plans to address the new standard. Until the states have developed implementation plans, the Companies are unable to predict whether or to what extent the new rules will ultimately require additional controls. However, if significant expenditures are required to implement additional controls, it could adversely affect the Companies' results of operations and cash flows.
	In August 2010, the EPA issued revised National Emission Standards for Hazardous Air Pollutants for Reciprocating Internal Combustion Engines. The rule was amended in March 2011 and January 2013. The rule establishes emission standards for control of hazardous air pollutants for engines at smaller facilities, known as area sources. As a result of these regulations, Dominion Gas installed emissions controls on several compressor engines. Dominion Gas has spent approximately $2 million to date and is evaluating further expenditures. Dominion Gas is unable to estimate the additional potential impacts on results of operations, financial condition and/or cash flows related to this matter.
	In August 2012, the EPA issued the first NSPS impacting the natural gas production and gathering sectors and made revisions to the NSPS for natural gas processing and transmission facilities. These rules establish equipment performance specifications and emissions standards for control of volatile organic compound emissions for natural gas production wells, tanks, pneumatic controllers, and compressors in the upstream sector. Compliance with these rules is required for installations and wells constructed or reconstructed after August 23, 2011. The cost to comply with the NSPS will depend on the number of new wells and new equipment installations subject to the rule; therefore, Dominion Gas is unable to estimate the potential impacts on results of operations, financial condition and/or cash flows related to this matter.
	Water
	The CWA, as amended, is a comprehensive program requiring a broad range of regulatory tools including a permit program to authorize and regulate discharges to surface waters with strong enforcement mechanisms. The Companies must comply with applicable aspects of the CWA programs at their operating facilities.
	In October 2014, the final regulations under Section 316(b) of the CWA that govern existing facilities and new units at existing facilities that employ a cooling water intake structure and that have flow levels exceeding a minimum threshold became effective. The rule establishes a national standard for impingement based on seven compliance options, but forgoes the creation of a single technology standard for entrainment. Instead, the EPA has delegated entrainment technology decisions to state regulators. State regulators are to make case-by-case entrainment technology determinations after an examination of five mandatory facility-specific factors, including a social cost-benefit test, and six optional facility-specific factors. The rule governs all electric generating stations with water withdrawals above two MGD, with a heightened entrainment analysis for those facilities over 125 MGD. Dominion and Virginia Power have 14 and 11 facilities, respectively, that may be subject to the final regulations. Dominion anticipates that it will have to install impingement control technologies at many of these stations that have once-through cooling systems. Dominion and Virginia Power are currently evaluating the need or potential for entrainment controls under the final rule as these decisions will be made on a case-by-case basis after a thorough review of detailed biological, technology, cost and benefit studies. While the impacts of this rule could be material to Dominion's and Virginia Power's results of operations, financial condition and/or cash flows, the existing regulatory framework in Virginia provides rate recovery mechanisms that could substantially mitigate any such impacts for Virginia Power.
	In September 2010, Millstone's NPDES permit was reissued under the CWA. The conditions of the permit require an evaluation of control technologies that could result in additional expenditures in the future. The report summarizing the results of the evaluation was submitted in August 2012 and is under review by the Connecticut Department of Energy and Environmental Protection. Dominion cannot currently predict the outcome of this review. In October 2010, the permit issuance was appealed to the state court by a private plaintiff. The permit is expected to remain in effect during the appeal. In February 2015, the NPDES permit renewal application was submitted to the Connecticut Department of Energy and Environmental Protection along with a schedule to update the evaluation of control technologies consistent with the new federal 316(b) rule. Dominion is currently unable to make an estimate of the potential financial statement impacts related to this matter.
	Solid and Hazardous Waste
	The CERCLA, as amended, provides for immediate response and removal actions coordinated by the EPA in the event of threatened releases of hazardous substances into the environment and authorizes the U.S. government either to clean up sites at which hazardous substances have created actual or potential environmental hazards or to order persons responsible for the situation to do so. Under the CERCLA, as amended, generators and transporters of hazardous substances, as well as past and present owners and operators of contaminated sites, can be jointly, severally and strictly liable for the cost of cleanup. These potentially responsible parties can be ordered to perform a cleanup, be sued for costs associated with an EPA-directed cleanup, voluntarily settle with the U.S. government concerning their liability for cleanup costs, or voluntarily begin a site investigation and site remediation under state oversight.
	From time to time, Dominion, Virginia Power, or Dominion Gas may be identified as a potentially responsible party to a Superfund site. The EPA (or a state) can either allow such a party to conduct and pay for a remedial investigation, feasibility study and remedial action or conduct the remedial investigation and action itself and then seek reimbursement from the potentially responsible parties. Each party can be held jointly, severally and strictly liable for the cleanup costs. These parties can also bring contribution actions against each other and seek reimbursement from their insurance companies. As a result, Dominion, Virginia Power, or Dominion Gas may be responsible for the costs of remedial investigation and actions under the Superfund law or other laws or regulations regarding the remediation of waste. Except as noted below, the Companies do not believe this will have a material effect on results of operations, financial condition and/or cash flows.
	In September 2011, the EPA issued a UAO to Virginia Power and 22 other parties, ordering specific remedial action of certain areas at the Ward Transformer Superfund site located in Raleigh, North Carolina. Virginia Power does not believe it is a liable party under CERCLA based on its alleged connection to the site. In November 2011, Virginia Power and a number of other parties notified the EPA that they are declining to undertake the work set forth in the UAO.
	The EPA may seek to enforce a UAO in court pursuant to its enforcement authority under CERCLA, and may seek recovery of its costs in undertaking removal or remedial action. If the court determines that a respondent failed to comply with the UAO without sufficient cause, the EPA may also seek civil penalties of up to $37,500 per day for the violation and punitive damages of up to three times the costs incurred by the EPA as a result of the party's failure to comply with the UAO. Virginia Power is currently unable to make an estimate of the potential financial statement impacts related to the Ward Transformer matter.
	Dominion has determined that it is associated with 17 former manufactured gas plant sites, three of which pertain to Virginia Power and 12 of which pertain to Dominion Gas. Studies conducted by other utilities at their former manufactured gas plant sites have indicated that those sites contain coal tar and other potentially harmful materials. None of the former sites with which the Companies are associated is under investigation by any state or federal environmental agency. At one of the former sites, Dominion is conducting a state-approved post-closure groundwater monitoring program and an environmental land use restriction has been recorded. Another site has been accepted into a state-based voluntary remediation program. Virginia Power is currently evaluating the nature and extent of the contamination from this site as well as potential remedial options. Preliminary costs for options under evaluation for the site range from $1 million to $22 million. Due to the uncertainty surrounding the other sites, the Companies are unable to make an estimate of the potential financial statement impacts.
	In April 2015, the EPA's final rule regulating the management of CCRs stored in impoundments (ash ponds) and landfills was published in the Federal Register. The final rule regulates CCR landfills, existing ash ponds that still receive and manage CCRs, and inactive ash ponds that do not receive, but still store CCRs. Virginia Power currently operates inactive ash ponds, existing ash ponds, and CCR landfills subject to the final rule at eight different facilities and is also evaluating other features at its facilities for potential applicability under the final CCR rule.  The enactment of the final rule in April 2015 creates a legal obligation for Virginia Power to retrofit or close all of its inactive and existing ash ponds over a certain period of time, as well as perform required monitoring, corrective action, and post-closure care activities as necessary. Virginia Power is evaluating the cost and timing of compliance under the final rule in order to establish applicable ARO balances in the second quarter of 2015, which could have a material impact to its financial position and cash flows. Virginia Power does not expect these AROs to have a significant impact on overall results of operations taking into consideration the ash pond related liability established in 2014 as described below, as well as the potential for mitigation through rate recovery mechanisms under the existing regulatory framework in Virginia.
	Climate Change Legislation and Regulation
	In October 2013, the U.S. Supreme Court granted petitions filed by several industry groups, states, and the U.S. Chamber of Commerce seeking review of the D.C. Circuit Court's June 2012 decision upholding the EPA’s regulation of GHG emissions from stationary sources under the CAA's permitting programs. In June 2014, the U.S. Supreme Court ruled that the EPA lacked the authority under the CAA to require PSD or Title V permits for stationary sources based solely on GHG emissions. However, the Court upheld the EPA’s ability to require BACT for GHG for sources that are otherwise subject to PSD or Title V permitting for conventional pollutants. In July 2014, the EPA issued a memorandum specifying that it will no longer apply or enforce federal regulations or EPA-approved PSD state implementation plan provisions that require new and modified stationary sources to obtain a PSD permit when GHGs are the only pollutant that would be emitted at levels that exceed the permitting thresholds. In addition, the EPA stated that it will continue to use the existing thresholds to apply to sources that are otherwise subject to PSD for conventional pollutants until it completes a new rulemaking either justifying and upholding those thresholds or setting new ones. Some states have issued interim guidance that follows the EPA guidance. Due to uncertainty regarding what additional actions states may take to amend their existing regulations and what action the EPA ultimately takes to address the court ruling under a new rulemaking, the Companies cannot predict the impact to their financial statements at this time.
	In July 2011, the EPA signed a final rule deferring the need for PSD and Title V permitting for CO2 emissions for biomass projects. This rule temporarily deferred for a period of up to three years the consideration of CO2 emissions from biomass projects when determining whether a stationary source meets the PSD and Title V applicability thresholds, including those for the application of BACT.  The deferral policy expired in July 2014. In July 2013, the U.S. Court of Appeals for the D.C. Circuit vacated this rule; however, a mandate making this decision effective has not been issued.  Virginia Power converted three coal-fired generating stations, Altavista, Hopewell and Southampton, to biomass during the CO2 deferral period.  It is unclear how the court's decision or the EPA's final policy regarding the treatment of specific feedstock will affect biomass sources that were permitted during the deferral period; however, the expenditures to comply with any new requirements could be material to Dominion's and Virginia Power's financial statements.
	Other Legal Matters
	The Companies are defendants in a number of lawsuits and claims involving unrelated incidents of property damage and personal injury. Due to the uncertainty surrounding these matters, the Companies are unable to make an estimate of the potential financial statement impacts; however, they could have a material impact on results of operations, financial condition and/or cash flows.
	Appalachian Gateway
	Following the completion of the Appalachian Gateway Project in 2012, DTI received multiple change order requests and other claims for additional payments from a pipeline contractor for the project. In July 2013, DTI filed a complaint in U.S. District Court, Eastern District of Virginia for breach of contract as well as accounting and declaratory relief. The contractor filed a motion to dismiss, or in the alternative, a motion to transfer venue to Pennsylvania and/or West Virginia, where the pipelines were constructed. DTI filed an opposition to the contractor’s motion in August 2013. In November 2013, the court granted the contractor’s motion on the basis that DTI must first comply with the dispute resolution process. Pursuant to the ruling, DTI intends to mediate the matter. This case is pending. DTI has accrued a liability of approximately $6 million for this matter. Dominion Gas cannot currently estimate additional financial statement impacts, but there could be a material impact to its financial condition and/or cash flows.
	Ash Pond Closure Costs
	In September 2014, Virginia Power received a notice from the SELC on behalf of the Potomac Riverkeeper and Sierra Club alleging CWA violations at Possum Point. The notice alleges unpermitted discharges to surface water and groundwater from Possum Point's historical and active ash storage facilities. A similar notice from the SELC on behalf of the Sierra Club was subsequently received related to Chesapeake. In December 2014, Virginia Power offered to close all of its coal ash ponds and landfills at Possum Point, Chesapeake and Bremo as settlement of the potential litigation. While the issue is open to potential further negotiations, the SELC declined the offer as presented in January 2015 and, in March 2015, filed a lawsuit related to its claims of the alleged CWA violations at Chesapeake. As a result of the settlement offer, Virginia Power recognized a charge of $121 million in other operations and maintenance expense in its Consolidated Statements of Income in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014. Virginia Power expects to reverse this contingent liability and recognize the ARO in the second quarter of 2015 as described above, as the legal obligations created by the final CCR rule represent substantially the same activities contemplated by this settlement offer with respect to Possum Point, Chesapeake and Bremo. Any difference in measurement is not expected to be material to Virginia Power's results of operations.
	Nuclear Matters
	In March 2011, a magnitude 9.0 earthquake and subsequent tsunami caused significant damage at the Fukushima Daiichi nuclear power station in northeast Japan. These events have resulted in significant nuclear safety reviews required by the NRC and industry groups such as INPO. Like other U.S. nuclear operators, Dominion has been gathering supporting data and participating in industry initiatives focused on the ability to respond to and mitigate the consequences of design-basis and beyond-design-basis events at its stations.
	In July 2011, an NRC task force provided initial recommendations based on its review of the Fukushima Daiichi accident and in October 2011, the NRC staff prioritized these recommendations into Tiers 1, 2 and 3, with the Tier 1 recommendations consisting of actions which the staff determined should be started without unnecessary delay. In December 2011, the NRC Commissioners approved the agency staff's prioritization and recommendations, and that same month an appropriations act directed the NRC to require reevaluation of external hazards (not limited to seismic and flooding hazards) as soon as possible.
	Based on the prioritized recommendations, in March 2012, the NRC issued orders and information requests requiring specific reviews and actions to all operating reactors, construction permit holders and combined license holders based on the lessons learned from the Fukushima Daiichi event. The orders applicable to Dominion require implementation of safety enhancements related to mitigation strategies to respond to extreme natural events resulting in the loss of power at plants, and enhancing spent fuel pool instrumentation. The orders require prompt implementation of the safety enhancements and completion of implementation within two refueling outages or by December 31, 2016, whichever comes first. Implementation of these enhancements is currently in progress. The information requests issued by the NRC request each reactor to reevaluate the seismic and flooding hazards at their site using present-day methods and information, conduct walkdowns of their facilities to ensure protection against the hazards in their current design basis, and to reevaluate their emergency communications systems and staffing levels. Dominion and Virginia Power do not currently expect that compliance with the NRC's March 2012 orders and information requests will materially impact their financial position, results of operations or cash flows during the approximately four-year implementation period. The NRC staff is evaluating the implementation of the longer-term Tier 2 and Tier 3 recommendations. Dominion and Virginia Power are currently unable to estimate the potential financial impacts related to compliance with Tier 2 and Tier 3 recommendations.
	Guarantees, Surety Bonds and Letters of Credit
	Dominion
	At March 31, 2015, Dominion had issued $74 million of guarantees, primarily to support equity method investees. No significant amounts related to these guarantees have been recorded. As of March 31, 2015, Dominion’s exposure under these guarantees was $39 million, primarily related to certain reserve requirements associated with non-recourse financing.
	Dominion also enters into guarantee arrangements on behalf of its consolidated subsidiaries, primarily to facilitate their commercial transactions with third parties. To the extent that a liability subject to a guarantee has been incurred by one of Dominion's consolidated subsidiaries, that liability is included in the Consolidated Financial Statements. Dominion is not required to recognize liabilities for guarantees issued on behalf of its subsidiaries unless it becomes probable that it will have to perform under the guarantees. Terms of the guarantees typically end once obligations have been paid. Dominion currently believes it is unlikely that it would be required to perform or otherwise incur any losses associated with guarantees of its subsidiaries' obligations.
	At March 31, 2015, Dominion had issued the following subsidiary guarantees:
		Stated Limit		Value(1)
	(millions)
	Subsidiary debt(2)	$	27	$	27
	Commodity transactions(3)	2,816		1,075
	Nuclear obligations(4)	199		79
	Cove Point(5)	1,910		—
	Solar(6)	531		171
	Other(7)	528		36
	Total	$	6,011	$	1,388
	-1	Represents the estimated portion of the guarantee's stated limit that is utilized as of March 31, 2015 based upon prevailing economic conditions and fact patterns specific to each guarantee arrangement. For those guarantees related to obligations that are recorded as liabilities by Dominion's subsidiaries, the value includes the recorded amount.
	-2	Guarantee of debt of a DEI subsidiary. In the event of default by the subsidiary, Dominion would be obligated to repay such amounts.
	-3	Guarantees related to commodity commitments of certain subsidiaries, including subsidiaries of Virginia Power, Dominion Gas and DEI. These guarantees were provided to counterparties in order to facilitate physical and financial transactions in gas, oil, electricity, pipeline capacity, transportation and related commodities and services. If any of these subsidiaries fail to perform or pay under the contracts and the counterparties seek performance or payment, Dominion would be obligated to satisfy such obligation. Dominion and its subsidiaries receive similar guarantees as collateral for credit extended to others. The value provided includes certain guarantees that do not have stated limits.
	-4	Guarantees related to certain DEI subsidiaries' potential retrospective premiums that could be assessed if there is a nuclear incident under Dominion's nuclear insurance programs and guarantees for a DEI subsidiary's and Virginia Power's commitment to buy nuclear fuel. Excludes Dominion's agreement to provide up to $150 million and $60 million to two DEI subsidiaries to pay the operating expenses of Millstone (in the event of a prolonged outage) and Kewaunee, respectively, as part of satisfying certain NRC requirements concerned with ensuring adequate funding for the operations of nuclear power stations. The agreement for Kewaunee also provides for funds through the completion of decommissioning.
	-5	Guarantees related to Cove Point, in support of terminal services, transportation and construction. Two of the guarantees have no stated limit, one guarantee has a $150 million limit, and one guarantee has a $1.75 billion aggregate limit with an annual draw limit of $175 million.
	-6	Includes guarantees to facilitate the development of solar projects including guarantees to support the issuance of full notice to proceed under EPC agreements. Includes certain guarantees that do not have stated limits. Also includes guarantees entered into by DEI on behalf of certain subsidiaries to facilitate the acquisition and development of solar projects.
	-7	Guarantees related to other miscellaneous contractual obligations such as leases, environmental obligations and construction projects. Also includes guarantees related to certain DEI subsidiaries' obligations for equity capital contributions and energy generation associated with Fowler Ridge and NedPower. As of March 31, 2015, Dominion's maximum remaining cumulative exposure under these equity funding agreements is $63 million through 2019 and its maximum annual future contributions could range from approximately $4 million to $19 million. The value provided includes certain guarantees that do not have stated limits.
	Additionally, at March 31, 2015, Dominion had purchased $134 million of surety bonds, including $65 million at Virginia Power and $30 million at Dominion Gas, and authorized the issuance of letters of credit by financial institutions of $48 million to facilitate commercial transactions by its subsidiaries with third parties. Under the terms of surety bonds, the Companies are obligated to indemnify the respective surety bond company for any amounts paid.

Credit_Risk

Credit Risk	3 Months Ended
	Mar. 31, 2015
Risks and Uncertainties [Abstract]
Credit Risk	Credit Risk
	The Companies' accounting policies for credit risk are discussed in Note 23 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014.
	At March 31, 2015, Dominion's credit exposure totaled $356 million. Of this amount, investment grade counterparties, including those internally rated, represented 89%. No single counterparty, whether investment grade or non-investment grade, exceeded $46 million of exposure.
	Credit-Related Contingent Provisions
	The majority of Dominion's derivative instruments contain credit-related contingent provisions. These provisions require Dominion to provide collateral upon the occurrence of specific events, primarily a credit rating downgrade. If the credit-related contingent features underlying these instruments that are in a liability position and not fully collateralized with cash were fully triggered as of March 31, 2015 and December 31, 2014, Dominion would have been required to post an additional $16 million and $20 million, respectively, of collateral to its counterparties. The collateral that would be required to be posted includes the impacts of any offsetting asset positions and any amounts already posted for derivatives, non-derivative contracts and derivatives elected under the normal purchases and normal sales exception, per contractual terms. Dominion had posted approximately $96 million and $1 million in collateral at March 31, 2015 and December 31, 2014, respectively, related to derivatives with credit-related contingent provisions that are in a liability position and not fully collateralized with cash. The collateral posted includes any amounts paid related to non-derivative contracts and derivatives elected under the normal purchases and normal sales exception, per contractual terms. The aggregate fair value of all derivative instruments with credit-related contingent provisions that are in a liability position and not fully collateralized with cash as of March 31, 2015 and December 31, 2014 was $40 million and $49 million, respectively, which does not include the impact of any offsetting asset positions. Credit-related contingent provisions for Virginia Power and Dominion Gas were not material as of March 31, 2015 and December 31, 2014. See Note 9 for further information about derivative instruments.
	Dominion Gas
	In the first quarter of 2015, DTI provided service to 248 customers with approximately 94% of its storage and transportation revenue being provided through firm services. The ten largest customers provided approximately 42% of the total storage and transportation revenue of approximately $201 million and the thirty largest provided approximately 73% of total storage and transportation revenue. Approximately 98% of the transmission capacity under contract on DTI’s pipeline is subscribed with long-term contracts (two years or greater). The remaining 2% is contracted on a year-to-year basis. Less than 1% of firm transportation capacity is currently unsubscribed. All storage services are subscribed under long-term contracts.
	East Ohio distributes natural gas to residential, commercial and industrial customers in Ohio using rates established by the Ohio Commission. Approximately 99% of East Ohio revenues are derived from its jurisdictional gas services. East Ohio’s bad debt risk is mitigated by the regulatory framework established by the Ohio Commission.

Related_Party_Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions
	Virginia Power and Dominion Gas engage in related party transactions primarily with other Dominion subsidiaries (affiliates). Virginia Power's and Dominion Gas' receivable and payable balances with affiliates are settled based on contractual terms or on a monthly basis, depending on the nature of the underlying transactions. Virginia Power and Dominion Gas are included in Dominion's consolidated federal income tax return. A discussion of significant related party transactions follows.
	Virginia Power
	Transactions with Affiliates
	Virginia Power transacts with affiliates for certain quantities of natural gas and other commodities in the ordinary course of business. Virginia Power also enters into certain commodity derivative contracts with affiliates. Virginia Power uses these contracts, which are principally comprised of commodity swaps, to manage commodity price risks associated with purchases of natural gas. As of March 31, 2015, Virginia Power's derivative assets and liabilities with affiliates were $24 million and $7 million, respectively. As of December 31, 2014, Virginia Power's derivative assets and liabilities with affiliates were not material. See Notes 7 and 9 for more information.
	Virginia Power participates in certain Dominion benefit plans described in Note 18. In Virginia Power's Consolidated Balance Sheets at March 31, 2015 and December 31, 2014, amounts due to Dominion associated with these benefit plans included in other deferred credits and other liabilities were $243 million and $219 million, respectively, and amounts due from Dominion at March 31, 2015 included in other deferred charges and other assets were $46 million.
	DRS and other affiliates provide accounting, legal, finance and certain administrative and technical services to Virginia Power. In addition, Virginia Power provides certain services to affiliates, including charges for facilities and equipment usage.
	Presented below are Virginia Power's significant transactions with DRS and other affiliates:
		Three Months Ended March 31,
		2015		2014
	(millions)
	Commodity purchases from affiliates	$	252	$	202
	Services provided by affiliates(1)	110		108
	Services provided to affiliates	5		5
	-1	Includes capitalized expenditures.
	Virginia Power has borrowed funds from Dominion under short-term borrowing arrangements. There were $10 million and $427 million in short-term demand note borrowings from Dominion as of March 31, 2015 and December 31, 2014, respectively. Virginia Power had no outstanding borrowings, net of repayments under the Dominion money pool for its nonregulated subsidiaries as of March 31, 2015 and December 31, 2014. Interest charges related to Virginia Power's borrowings from Dominion were immaterial for the three months ended March 31, 2015 and 2014.
	There were no issuances of Virginia Power's common stock to Dominion for the three months ended March 31, 2015 and 2014.
	Dominion Gas
	Transactions with Related Parties
	Dominion Gas transacts with affiliates for certain quantities of natural gas and other commodities at market prices in the ordinary course of business. Additionally, Dominion Gas provides transportation and storage services to affiliates. Dominion Gas also enters into certain other contracts with affiliates, which are presented separately from contracts involving commodities or services. As of March 31, 2015 and December 31, 2014, all of Dominion Gas' commodity derivatives were with affiliates. See Notes 7 and 9 for more information. See Note 10 for information regarding sales of assets to an affiliate.
	Dominion Gas participates in certain Dominion benefit plans as described in Note 18.
	DRS and other affiliates provide accounting, legal, finance and certain administrative and technical services to Dominion Gas. Dominion Gas provides certain services to related parties, including technical services. The costs of these services follow:
		Three Months Ended March 31,
		2015		2014
	(millions)
	Purchases of natural gas and transportation and storage services from affiliates	$	2	$	18
	Sales of natural gas and transportation and storage services to affiliates	18		21
	Services provided by related parties(1)	34		28
	Services provided to related parties	20		13
	-1	Includes capitalized expenditures.
	The following table presents affiliated and related party activity reflected in Dominion Gas' Consolidated Balance Sheets:
		31-Mar-15		31-Dec-14
	(millions)
	Customer receivables from related parties(1)	$	11	$	22
	Imbalances receivable from affiliates(2)	4		3
	Affiliated notes receivable(3)	10		9
	(1) Includes $5 million and $17 million due from Atlantic Coast Pipeline, a related party VIE, at March 31, 2015 and December 31, 2014, respectively.
	(2) Amounts are presented in other current assets in Dominion Gas' Consolidated Balance Sheets.
	(3) Amounts are presented in other deferred charges and other assets in Dominion Gas' Consolidated Balance Sheets.
	Dominion Gas' borrowings under the IRCA with Dominion totaled $39 million as of March 31, 2015 and $384 million as of December 31, 2014. Interest charges related to Dominion Gas' total borrowings from Dominion were immaterial for the three months ended March 31, 2015 and 2014.

Employee_Benefit_Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans
	Dominion
	The components of Dominion's provision for net periodic benefit cost (credit) were as follows:
		Pension Benefits						Other Postretirement Benefits
		2015			2014			2015			2014
	(millions)
	Three Months Ended March 31,
	Service cost	$	32		$	29		$	10		$	8
	Interest cost	72			72			17			17
	Expected return on plan assets	(133		)	(125		)	(29		)	(28		)
	Amortization of prior service cost (credit)	—			1			(7		)	(7		)
	Amortization of net actuarial loss	40			28			1			—
	Net periodic benefit cost (credit)	$	11		$	5		$	(8	)	$	(10	)
	Employer Contributions
	During the three months ended March 31, 2015, Dominion made no contributions to its defined benefit pension plans or other postretirement benefit plans. Dominion expects to contribute approximately $12 million to its other postretirement benefit plans through VEBAs during the remainder of 2015.
	Dominion Gas
	Dominion Gas participates in certain Dominion benefit plans as described in Note 21 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014. At March 31, 2015 and December 31, 2014, Dominion Gas’ amounts due from Dominion associated with the Dominion Pension Plan and reflected in noncurrent pension and other postretirement benefit assets in the Consolidated Balance Sheets were $623 million and $614 million, respectively. At March 31, 2015 and December 31, 2014, Dominion Gas’ amounts due to Dominion associated with the Dominion Retiree Health and Welfare Plan and reflected in other deferred credits and other liabilities in the Consolidated Balance Sheets were $6 million and $7 million, respectively.
	The components of Dominion Gas' provision for net periodic benefit credit for employees represented by collective bargaining units were as follows:
		Pension Benefits						Other Postretirement Benefits
		2015			2014			2015			2014
	(millions)
	Three Months Ended March 31,
	Service cost	$	3		$	3		$	2		$	1
	Interest cost	7			7			3			3
	Expected return on plan assets	(31		)	(29		)	(6		)	(5		)
	Amortization of net actuarial loss	5			5			1			—
	Net periodic benefit credit	$	(16	)	$	(14	)	$	—		$	(1	)
	Employer Contributions
	During the three months ended March 31, 2015, Dominion Gas made no contributions to its defined benefit pension plans or other postretirement benefit plans. Dominion Gas expects to contribute approximately $12 million to its other postretirement benefit plans through VEBAs, for both employees represented by collective bargaining units and employees not represented by collective bargaining units, during the remainder of 2015.

Operating_Segments

Operating Segments	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Operating Segments	Operating Segments
	The Companies are organized primarily on the basis of products and services sold in the U.S. A description of the operations included in the Companies’ primary operating segments is as follows:
	Primary Operating Segment	Description of Operations	Dominion	Virginia Power	Dominion Gas
	DVP	Regulated electric distribution	X	X
		Regulated electric transmission	X	X
	Dominion Generation	Regulated electric fleet	X	X
		Merchant electric fleet	X
		Nonregulated retail energy marketing	X
	Dominion Energy	Gas transmission and storage(1)	X		X
		Gas distribution and storage	X		X
		Gas gathering and processing	X		X
		LNG import and storage	X
	-1	Includes remaining producer services activities for Dominion.
	In addition to the operating segments above, the Companies also report a Corporate and Other segment.
	Dominion
	The Corporate and Other Segment of Dominion includes its corporate, service company and other functions (including unallocated debt) and the net impact of operations that are discontinued or sold. In addition, Corporate and Other includes specific items attributable to Dominion's operating segments that are not included in profit measures evaluated by executive management in assessing the segments' performance or allocating resources among the segments.
	In January 2014, Dominion announced it would exit the electric retail energy marketing business. Dominion completed the sale in March 2014. As a result, the earnings impact from the electric retail energy marketing business has been included in the Corporate and Other Segment of Dominion for 2014 first quarter results of operations.
	In the second quarter of 2013, Dominion commenced a repositioning of its producer services business, which aggregates natural gas supply, engages in natural gas trading and marketing activities and natural gas supply management and provides price risk management services to Dominion affiliates. The repositioning was completed in the first quarter of 2014 and resulted in the termination of natural gas trading and certain energy marketing activities. As a result, the earnings impact from natural gas trading and certain energy marketing activities has been included in the Corporate and Other Segment of Dominion for 2014.
	In the three months ended March 31, 2015, Dominion reported an after-tax net expense of $48 million for specific items in the Corporate and Other segment, with $45 million of these net expenses attributable to its operating segments. In the three months ended March 31, 2014, Dominion reported an after-tax net expense of $228 million for specific items in the Corporate and Other segment, with $217 million of these net expenses attributable to its operating segments.
	The net expense for specific items in 2015 primarily related to the impact of the following items:
	•	An $85 million ($52 million after-tax) write-off of deferred fuel costs associated with Virginia legislation enacted in February 2015, attributable to Dominion Generation; and
	•	A $17 million ($10 million after-tax) billing adjustment related to PJM, attributable to Dominion Generation; partially offset by
	•	A $27 million ($17 million after-tax) net gain on investments held in nuclear decommissioning trust funds, attributable to Dominion Generation.
	The net expense for specific items in 2014 primarily related to the impact of the following items:
	•	A $319 million ($193 million after-tax) net loss related to the producer services business discussed above, attributable to Dominion Energy; and
	•	A $47 million ($33 million after-tax) net loss related to the electric retail energy marketing business discussed above, including a $147 million ($90 million after-tax) loss from normal operations, partially offset by a $100 million ($57 million after-tax) gain on sale, net of a $31 million write-off of goodwill, attributable to Dominion Generation.
	The following table presents segment information pertaining to Dominion’s operations:
		DVP			Dominion			Dominion			Corporate			Adjustments/Eliminations			Consolidated
					Generation			Energy			and Other						Total
	(millions)
	Three Months Ended March 31, 2015
	Total revenue from external customers	$	564		$	2,122		$	379		$	(13	)	$	357		$	3,409
	Intersegment revenue	5			26			360			142			(533		)	—
	Total operating revenue	569			2,148			739			129			(176		)	3,409
	Net income (loss) attributable to Dominion	140			282			207			(93		)	—			536
	Three Months Ended March 31, 2014
	Total revenue from external customers	$	502		$	2,260		$	362		$	(2	)	$	508		$	3,630
	Intersegment revenue	2			24			489			147			(662		)	—
	Total operating revenue	504			2,284			851			145			(154		)	3,630
	Net income (loss) attributable to Dominion	131			309			208			(269		)	—			379
	Intersegment sales and transfers for Dominion are based on contractual arrangements and may result in intersegment profit or loss that is eliminated in consolidation.
	Virginia Power
	The Corporate and Other Segment of Virginia Power primarily includes specific items attributable to its operating segments that are not included in profit measures evaluated by executive management in assessing the segments' performance or allocating resources among the segments.
	In the three months ended March 31, 2015, Virginia Power reported an after-tax net expense of $61 million for specific items in the Corporate and Other segment, all of which was attributable to its operating segments. There were no material net benefit or expense items in the Corporate and Other segment in the three months ended March 31, 2014.
	The net expense for specific items in 2015 primarily related to the impact of the following items:
	•	An $85 million ($52 million after-tax) write-off of deferred fuel costs associated with Virginia legislation enacted in February 2015, attributable to Dominion Generation; and
	•	A $15 million ($9 million after-tax) billing adjustment related to PJM, attributable to Dominion Generation.
	The following table presents segment information pertaining to Virginia Power’s operations:
		DVP			Dominion			Corporate			Consolidated
					Generation			and Other			Total
	(millions)
	Three Months Ended March 31, 2015
	Operating revenue	$	567		$	1,585		$	(15	)	$	2,137
	Net income (loss)	140			190			(61		)	269
	Three Months Ended March 31, 2014
	Operating revenue	$	502		$	1,481		$	—		$	1,983
	Net income	134			189			1			324
	Dominion Gas
	The Corporate and Other Segment of Dominion Gas primarily includes specific items attributable to Dominion Gas' operating segment that are not included in profit measures evaluated by executive management in assessing the segment's performance and the effect of certain items recorded at Dominion Gas as a result of Dominion's basis in the net assets contributed.
	In the three months ended March 31, 2015 and 2014, Dominion Gas reported no amounts for specific items in the Corporate and Other segment.
	The following table presents segment information pertaining to Dominion Gas' operations:
		Dominion Energy			Corporate and Other			Consolidated Total
	(millions)
	Three Months Ended March 31, 2015
Operating revenue	$	531		$	—		$	531
Net income (loss)	164			(3		)	161
Three Months Ended March 31, 2014
Operating revenue	$	569		$	—		$	569
Net income (loss)	166			(2		)	164

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Estimates	The Companies make certain estimates and assumptions in preparing their Consolidated Financial Statements in accordance with GAAP. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the periods presented. Actual results may differ from those estimates.

Operating_Revenue_Tables

Operating Revenue (Tables)	3 Months Ended
	Mar. 31, 2015
Regulated and Unregulated Operating Revenue [Abstract]
Operating Revenue	The Companies’ operating revenue consists of the following:
		Three Months Ended March 31,
		2015		2014
	(millions)
	Dominion
	Electric sales:
	Regulated	$	2,112	$	1,951
	Nonregulated	406		854
	Gas sales:
	Regulated	116		147
	Nonregulated	208		117
	Gas transportation and storage	471		444
	Other	96		117
	Total operating revenue	$	3,409	$	3,630
	Virginia Power
	Regulated electric sales	$	2,112	$	1,951
	Other	25		32
	Total operating revenue	$	2,137	$	1,983
	Dominion Gas
	Gas sales:
	Regulated	$	57	$	83
	Nonregulated	3		9
	Gas transportation and storage	412		396
	NGL revenue	29		57
	Other	30		24
	Total operating revenue	$	531	$	569

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Effective Income Tax	For continuing operations, including noncontrolling interests, the statutory U.S. federal income tax rate reconciles to the Companies' effective income tax rate as follows:
		Dominion				Virginia Power				Dominion Gas
	Three Months Ended March 31,	2015		2014		2015		2014		2015		2014
	U.S. statutory rate	35	%	35	%	35	%	35	%	35	%	35	%
	Increases (reductions) resulting from:
	State taxes, net of federal benefit	2.9		2.7		3.8		3.8		4		3.4
	Investment tax credits	(0.8	)	(3.6	)	—		—		—		—
	Production tax credits	(0.8	)	(0.6	)	(0.4	)	(0.8	)	—		—
	Other, net	(0.6	)	(0.8	)	(0.7	)	(0.2	)	(0.1	)	0.3
	Effective tax rate	35.7	%	32.7	%	37.7	%	37.8	%	38.9	%	38.7	%

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share Computation	The following table presents the calculation of Dominion’s basic and diluted EPS:
		Three Months Ended March 31,
		2015		2014
	(millions, except EPS)
	Net income attributable to Dominion	$	536	$	379
	Average shares of common stock outstanding – Basic	587.9		581.6
	Net effect of dilutive securities(1)	2		1.3
	Average shares of common stock outstanding – Diluted	589.9		582.9
	Earnings Per Common Share – Basic and Diluted	$	0.91	$	0.65
	-1	Dilutive securities consist primarily of the 2013 Equity Units for 2015 and contingently convertible senior notes and the 2013 Equity Units for 2014. See Note 14 in this report and Note 17 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014 for more information.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents Dominion’s changes in AOCI by component, net of tax:
		Deferred gains and losses on derivatives-hedging activities			Unrealized gains and losses on investment securities			Unrecognized pension and other postretirement benefit costs			Other comprehensive income (loss) from equity method investee			Total
	(millions)
	Three Months Ended March 31, 2015
	Beginning balance	$	(178	)	$	548		$	(782	)	$	(4	)	$	(416	)
	Other comprehensive income before reclassifications: gains (losses)	(58		)	15			—			(1		)	(44		)
	Amounts reclassified from AOCI(1): (gains) losses	59			(21		)	13			—			51
	Net current-period other comprehensive income (loss)	1			(6		)	13			(1		)	7
	Ending balance	$	(177	)	$	542		$	(769	)	$	(5	)	$	(409	)
	Three Months Ended March 31, 2014
	Beginning balance	$	(288	)	$	474		$	(510	)	$	—		$	(324	)
	Other comprehensive income before reclassifications: gains (losses)	(150		)	29			(4		)	(7		)	(132		)
	Amounts reclassified from AOCI(1): (gains) losses	160			(11		)	8			—			157
	Net current-period other comprehensive income (loss)	10			18			4			(7		)	25
	Ending balance	$	(278	)	$	492		$	(506	)	$	(7	)	$	(299	)
	(1) See table below for details about these reclassifications.
Reclassification out of Accumulated Other Comprehensive Income	The following table presents Dominion’s reclassifications out of AOCI by component:
	Details about AOCI components	Amounts reclassified from AOCI			Affected line item in the Consolidated Statements of Income
	(millions)
	Three Months Ended March 31, 2015
	Deferred (gains) and losses on derivatives-hedging activities:
	Commodity contracts	$	92		Operating revenue
		5			Purchased gas
		(1		)	Electric fuel and other energy-related purchases
	Interest rate contracts	2			Interest and related charges
		98
	Tax	(39		)	Income tax expense
		$	59
	Unrealized (gains) and losses on investment securities:
	Realized (gain) loss on sale of securities	$	(39	)	Other income
	Impairment	6			Other income
		(33		)
	Tax	12			Income tax expense
		$	(21	)
	Unrecognized pension and other postretirement benefit costs:
	Prior service (credit) costs	$	(3	)	Other operations and maintenance
	Actuarial (gains) losses	25			Other operations and maintenance
		22
	Tax	(9		)	Income tax expense
		$	13
	Three Months Ended March 31, 2014
	Deferred (gains) and losses on derivatives-hedging activities:
	Commodity contracts	$	269		Operating revenue
		1			Purchased gas
		(13		)	Electric fuel and other energy-related purchases
	Interest rate contracts	3			Interest and related charges
		260
	Tax	(100		)	Income tax expense
		$	160
	Unrealized (gains) and losses on investment securities:
	Realized (gain) loss on sale of securities	$	(20	)	Other income
	Impairment	2			Other income
		(18		)
	Tax	7			Income tax expense
		$	(11	)
	Unrecognized pension and other postretirement benefit costs:
	Prior service (credit) costs	$	(3	)	Other operations and maintenance
	Actuarial (gains) losses	17			Other operations and maintenance
		14
	Tax	(6		)	Income tax expense
		$	8
Dominion Gas Holdings, LLC
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents Dominion Gas’ changes in AOCI by component, net of tax:
		Deferred gains and losses on derivatives-hedging activities			Unrecognized pension and other postretirement benefit costs			Total
	(millions)
	Three Months Ended March 31, 2015
	Beginning balance	$	(20	)	$	(66	)	$	(86	)
	Other comprehensive income before reclassifications: gains (losses)	(4		)	—			(4		)
	Amounts reclassified from AOCI(1): (gains) losses	—			1			1
	Net current-period other comprehensive income (loss)	(4		)	1			(3		)
	Ending balance	$	(24	)	$	(65	)	$	(89	)
	Three Months Ended March 31, 2014
	Beginning balance	$	3		$	(61	)	$	(58	)
	Other comprehensive income before reclassifications: gains (losses)	(8		)	—			(8		)
	Amounts reclassified from AOCI(1): (gains) losses	5			1			6
	Net current-period other comprehensive income (loss)	(3		)	1			(2		)
	Ending balance	$	—		$	(60	)	$	(60	)
	-1	See table below for details about these reclassifications.
Reclassification out of Accumulated Other Comprehensive Income	The following table presents Dominion Gas' reclassifications out of AOCI by component:
	Details about AOCI components	Amounts reclassified from AOCI			Affected line item in the Consolidated Statements of Income
	(millions)
	Three Months Ended March 31, 2015
	Unrecognized pension and other postretirement benefit costs:
	Actuarial (gains) losses	$	2		Other operations and maintenance
		2
	Tax	(1		)	Income tax expense
		$	1
	Three Months Ended March 31, 2014
	Deferred (gains) and losses on derivatives-hedging activities:
	Commodity contracts	$	6		Operating revenue
		2			Purchased gas
		8
	Tax	(3		)	Income tax expense
		$	5
	Unrecognized pension and other postretirement benefit costs:
	Actuarial (gains) losses	$	2		Other operations and maintenance
		2
	Tax	(1		)	Income tax expense
		$	1

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Option, Quantitative Disclosures	The following table presents Dominion's quantitative information about Level 3 fair value measurements at March 31, 2015. The range and weighted average are presented in dollars for market price inputs and percentages for credit spreads and price volatility.
		Fair Value (millions)			Valuation Techniques	Unobservable Input		Range	Weighted Average(1)
	Assets:
	Physical and Financial Forwards and Futures:
	Natural Gas(2)	$	85		Discounted Cash Flow	Market Price (per Dth)	(3)	(2) - 6	(1	)
						Credit spread	(4)	1% - 5%	2	%
	FTRs	4			Discounted Cash Flow	Market Price (per MWh)	(3)	(5) - 7	1
	Physical and Financial Options:
	Natural Gas	5			Option Model	Market Price (per Dth)	(3)	4-Feb	3
						Price Volatility	(5)	21% - 76%	32	%
	Total assets	$	94
	Liabilities:
	Physical and Financial Forwards and Futures:
	Natural Gas(2)	$	12		Discounted Cash Flow	Market Price (per Dth)	(3)	(2) - 4	2
	FTRs	4			Discounted Cash Flow	Market Price (per MWh)	(3)	(2) - 5	1
	Physical and Financial Options:
	Natural Gas	2			Option Model	Market Price (per Dth)	(3)	4-Feb	3
						Price Volatility	(5)	21% - 76%	32	%
	Total liabilities	$	18
	-1	Averages weighted by volume.
	-2	Includes basis.
	-3	Represents market prices beyond defined terms for Levels 1 and 2.
	-4	Represents credit spreads unrepresented in published markets.
	-5	Represents volatilities unrepresented in published markets.
Significant unobservable inputs	Sensitivity of the fair value measurements to changes in the significant unobservable inputs is as follows:
	Significant Unobservable Inputs	Position	Change to Input	Impact on Fair Value Measurement
	Market Price	Buy	Increase (decrease)	Gain (loss)
	Market Price	Sell	Increase (decrease)	Loss (gain)
	Price Volatility	Buy	Increase (decrease)	Gain (loss)
	Price Volatility	Sell	Increase (decrease)	Loss (gain)
	Credit spread	Asset	Increase (decrease)	Loss (gain)
Fair Value, by Balance Sheet Grouping	The following table presents Dominion’s assets and liabilities that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions:
		Level 1			Level 2			Level 3			Total
	(millions)
	At March 31, 2015
	Assets:
	Derivatives:
	Commodity	$	3		$	564		$	94		$	661
	Interest rate	—			18			—			18
	Investments(1):
	Equity securities:
	U.S.:
	Large cap	2,647			—			—			2,647
	Other	7			—			—			7
	Non-U.S.:
	Large cap	12			—			—			12
	Fixed income:
	Corporate debt instruments	—			462			—			462
	U.S. Treasury securities and agency debentures	407			187			—			594
	State and municipal	—			423			—			423
	Other	—			130			—			130
	Cash equivalents and other	1			4			—			5
	Total assets	$	3,077		$	1,788		$	94		$	4,959
	Liabilities:
	Derivatives:
	Commodity	$	3		$	437		$	18		$	458
	Interest rate	—			307			—			307
	Total liabilities	$	3		$	744		$	18		$	765
	At December 31, 2014
	Assets:
	Derivatives:
	Commodity	$	3		$	567		$	125		$	695
	Interest rate	—			24			—			24
	Investments(1):
	Equity securities:
	U.S.:
	Large cap	2,669			—			—			2,669
	Other	6			—			—			6
	Non-U.S.:
	Large cap	12			—			—			12
	Fixed income:
	Corporate debt instruments	—			441			—			441
	U.S. Treasury securities and agency debentures	419			190			—			609
	State and municipal	—			395			—			395
	Other	—			74			—			74
	Cash equivalents and other	3			10			—			13
	Total assets	$	3,112		$	1,701		$	125		$	4,938
	Liabilities:
	Derivatives:
	Commodity	$	3		$	571		$	18		$	592
	Interest rate	—			202			—			202
	Total liabilities	$	3		$	773		$	18		$	794
	-1	Includes investments held in the nuclear decommissioning and rabbi trusts.
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following table presents the net change in Dominion's assets and liabilities measured at fair value on a recurring basis and included in the Level 3 fair value category:
		Three Months Ended March 31,
		2015			2014
	(millions)
	Beginning balance	$	107		$	(16	)
	Total realized and unrealized gains (losses):
	Included in earnings	15			110
	Included in other comprehensive income (loss)	(11		)	4
	Included in regulatory assets/liabilities	(24		)	17
	Settlements	(14		)	(108		)
	Transfers out of Level 3(1)	3			1
	Ending balance	$	76		$	8
	The amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	$	—		$	1
	-1	In March 2015, Dominion changed the classification of NGL derivatives from Level 3 to Level 2 due to an increase in liquidity in financial forward markets. At March 31, 2015, $9 million of the transfers out of Level 3 relate to NGLs.
Fair Value, Unobservable Inputs, Gain (Loss) Included In Earnings	The following table presents Dominion's classification of gains and losses included in earnings in the Level 3 fair value category:
		Operating			Electric fuel			Total
		revenue			and other
					energy-related
					purchases
	(millions)
	Three Months Ended March 31, 2015
	Total gains (losses) included in earnings	$	2		$	13		$	15
	The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	—			—			—
	Three Months Ended March 31, 2014
	Total gains (losses) included in earnings	$	(10	)	$	120		$	110
	The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	1			—			1
Cost and Fair Value of Financial Instruments Disclosure	For the Companies' financial instruments that are not recorded at fair value, the carrying amounts and estimated fair values are as follows:
		31-Mar-15						31-Dec-14
		Carrying			Estimated Fair			Carrying			Estimated Fair
		Amount			Value(1)			Amount			Value(1)
	(millions)
	Dominion
	Long-term debt, including securities due within one year(2)(3)	$	19,718		$	22,197		$	19,723		$	21,881
	Junior subordinated notes(3)	1,373			1,405			1,374			1,396
	Remarketable subordinated notes(3)	2,084			2,206			2,083			2,362
	Virginia Power
	Long-term debt, including securities due within one year(3)	$	8,936		$	10,441		$	8,937		$	10,293
	Dominion Gas
	Long-term debt(3)	$	2,594		$	2,720		$	2,594		$	2,672
	-1	Fair value is estimated using market prices, where available, and interest rates currently available for issuance of debt with similar terms and remaining maturities. All fair value measurements are classified as Level 2. The carrying amount of debt issues with short-term maturities and variable rates refinanced at current market rates is a reasonable estimate of their fair value.
	-2	At March 31, 2015 and December 31, 2014, includes the valuation of certain fair value hedges associated with fixed rate debt of approximately $15 million and $19 million, respectively.
	-3	Carrying amount includes amounts which represent the unamortized discount and/or premium.
Virginia Electric and Power Company
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Option, Quantitative Disclosures	The following table presents Virginia Power's quantitative information about Level 3 fair value measurements at March 31, 2015. The range and weighted average are presented in dollars for market price inputs and percentages for credit spreads.
		Fair Value (millions)			Valuation Techniques	Unobservable Input		Range	Weighted Average(1)
	Assets:
	Physical and Financial Forwards and Futures:
	FTRs	$	4		Discounted Cash Flow	Market Price (per MWh)	(3)	(5) - 7	1
	Natural Gas(2)	78			Discounted Cash Flow	Market Price (per Dth)	(3)	(2) - 3	(1	)
						Credit spread	(4)	1% - 5%	2	%
	Total assets	$	82
	Liabilities:
	Physical and Financial Forwards and Futures:
	FTRs	$	4		Discounted Cash Flow	Market Price (per MWh)	(3)	(2) - 5	1
	Total liabilities	$	4
	-1	Averages weighted by volume.
	-2	Includes basis.
	-3	Represents market prices beyond defined terms for Levels 1 and 2.
	-4	Represents credit spreads unrepresented in published markets.
Significant unobservable inputs	Sensitivity of the fair value measurements to changes in the significant unobservable inputs is as follows:
	Significant Unobservable Inputs	Position	Change to Input	Impact on Fair Value Measurement
	Market Price	Buy	Increase (decrease)	Gain (loss)
	Market Price	Sell	Increase (decrease)	Loss (gain)
	Credit spread	Asset	Increase (decrease)	Loss (gain)
Fair Value, by Balance Sheet Grouping	The following table presents Virginia Power’s assets and liabilities that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions:
		Level 1			Level 2			Level 3			Total
	(millions)
	At March 31, 2015
	Assets:
	Derivatives:
	Commodity	$	—		$	24		$	82		$	106
	Investments(1):
	Equity securities:
	U.S. large cap	1,166			—			—			1,166
	Fixed income:
	Corporate debt instruments	—			258			—			258
	U.S. Treasury securities and agency debentures	129			63			—			192
	State and municipal	—			224			—			224
	Other	—			31			—			31
	Total assets	$	1,295		$	600		$	82		$	1,977
	Liabilities:
	Derivatives:
	Commodity	$	—		$	7		$	4		$	11
	Interest rate	—			128			—			128
	Total liabilities	$	—		$	135		$	4		$	139
	At December 31, 2014
	Assets:
	Derivatives:
	Commodity	$	—		$	7		$	106		$	113
	Investments(1):
	Equity securities:
	U.S. large cap	1,157			—			—			1,157
	Fixed income:
	Corporate debt instruments	—			250			—			250
	U.S. Treasury securities and agency debentures	137			61			—			198
	State and municipal	—			211			—			211
	Other	—			23			—			23
	Total assets	$	1,294		$	552		$	106		$	1,952
	Liabilities:
	Derivatives:
	Commodity	$	—		$	11		$	4		$	15
	Interest rate	—			72			—			72
	Total liabilities	$	—		$	83		$	4		$	87
	-1	Includes investments held in the nuclear decommissioning and rabbi trusts.
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following table presents the net change in Virginia Power’s assets and liabilities measured at fair value on a recurring basis and included in the Level 3 fair value category:
		Three Months Ended March 31,
		2015			2014
	(millions)
	Beginning balance	$	102		$	(7	)
	Total realized and unrealized gains (losses):
	Included in earnings	14			120
	Included in regulatory assets/liabilities	(24		)	17
	Settlements	(14		)	(120		)
	Ending balance	$	78		$	10
Dominion Gas Holdings, LLC
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, by Balance Sheet Grouping	The following table presents Dominion Gas' assets and liabilities for derivatives that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions:
		Level 1			Level 2			Level 3			Total
	(millions)
	At March 31, 2015
	Assets:
	Commodity	$	—		$	3		$	—		$	3
	Total Assets	$	—		$	3		$	—		$	3
	Liabilities:
	Commodity	$	—		$	3		$	—		$	3
	Interest rate	—			13			—			13
	Total liabilities	$	—		$	16		$	—		$	16
	At December 31, 2014
	Assets:
	Commodity	$	—		$	—		$	2		$	2
	Total Assets	$	—		$	—		$	2		$	2
	Liabilities:
	Interest rate	$	—		$	9		$	—		$	9
	Total liabilities	$	—		$	9		$	—		$	9
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following table presents the net change in Dominion Gas' assets and liabilities for derivatives measured at fair value on a recurring basis and included in the Level 3 fair value category:
		Three Months Ended March 31,
		2015			2014
	(millions)
	Beginning balance	$	2		$	(6	)
	Total realized and unrealized gains (losses):
	Included in earnings	1			(5		)
	Included in other comprehensive income (loss)	(11		)	4
	Settlements	(1		)	5
	Transfers out of Level 3(1)	9			—
	Ending balance	$	—		$	(2	)
	-1	In March 2015, Dominion changed the classification of NGL derivatives from Level 3 to Level 2 due to an increase in liquidity in financial forward markets. At March 31, 2015, $9 million of the transfers out of Level 3 relate to NGLs.

Derivatives_and_Hedge_Accounti1

Derivatives and Hedge Accounting Activities (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative [Line Items]
Offsetting Assets	The tables below present Dominion's derivative asset and liability balances by type of financial instrument, before and after the effects of offsetting:
		31-Mar-15									31-Dec-14
		Gross Amounts of Recognized Assets			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Assets Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets Presented in the Consolidated Balance Sheet
	(millions)
	Interest rate contracts:
	Over-the-counter	$	18		$	—		$	18		$	24	$	—	$	24
	Commodity contracts:
	Over-the-counter	323			—			323			382		—		382
	Exchange	326			—			326			298		—		298
	Total derivatives, subject to a master netting or similar arrangement	667			—			667			704		—		704
	Total derivatives, not subject to a master netting or similar arrangement	12			—			12			15		—		15
	Total	$	679		$	—		$	679		$	719	$	—	$	719
					31-Mar-15										31-Dec-14
					Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
		Net Amounts of Assets Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Received			Net Amounts		Net Amounts of Assets Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amounts
	(millions)
	Interest rate contracts:
	Over-the-counter	$	18		$	18		$	—		$	—	$	24	$	16	$	—	$	8
	Commodity contracts:
	Over-the-counter	323			45			—			278		382		34		34		314
	Exchange	326			326			—			—		298		298		—		—
	Total	$	667		$	389		$	—		$	278	$	704	$	348	$	34	$	322
Offsetting Liabilities
		31-Mar-15									31-Dec-14
		Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet
	(millions)
	Interest rate contracts:
	Over-the-counter	$	307		$	—		$	307		$	202	$	—	$	202
	Commodity contracts:
	Over-the-counter	83			—			83			87		—		87
	Exchange	364			—			364			493		—		493
	Total derivatives, subject to a master netting or similar arrangement	754			—			754			782		—		782
	Total derivatives, not subject to a master netting or similar arrangement	11			—			11			12		—		12
	Total	$	765		$	—		$	765		$	794	$	—	$	794
					31-Mar-15										31-Dec-14
					Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Paid			Net Amounts		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Paid		Net Amounts
	(millions)
	Interest rate contracts:
	Over-the-counter	$	307		$	18		$	—		$	289	$	202	$	16	$	—	$	186
	Commodity contracts:
	Over-the-counter	83			45			—			38		87		34		1		52
	Exchange	364			326			38			—		493		298		195		—
	Total	$	754		$	389		$	38		$	327	$	782	$	348	$	196	$	238
Volumes of Derivative Activity	The following table presents the volume of Dominion’s derivative activity as of March 31, 2015. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions, except in the case of offsetting transactions, for which they represent the absolute value of the net volume of their long and short positions.
		Current			Noncurrent
	Natural Gas (bcf):
	Fixed price(1)	55			10
	Basis	224			558
	Electricity (MWh):
	Fixed price	13,610,507			7,505,325
	FTRs	14,994,541			—
	Capacity (MW)	15,250			3,050
	Liquids (Gal)(2)	77,280,000			2,016,000
	Interest rate	$	2,550,000,000		$	4,000,000,000
	-1	Includes options.
	-2	Includes NGLs and oil.
Cash Flow Hedges Included Accumulated Other Comprehensive Income (Loss)	The following table presents selected information related to gains (losses) on cash flow hedges included in AOCI in Dominion’s Consolidated Balance Sheet at March 31, 2015:
		AOCI			Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax			Maximum Term
		After-Tax
	(millions)
	Commodities:
	Gas	$	(5	)	$	(5	)	25 months
	Electricity	89			32			21 months
	Other	—			(1		)	14 months
	Interest rate	(261		)	(6		)	393 months
	Total	$	(177	)	$	20
Fair Value of Derivatives	The following table presents the fair values of Dominion’s derivatives and where they are presented in its Consolidated Balance Sheets:
		Fair Value –			Fair Value –			Total Fair Value
		Derivatives under			Derivatives not under
		Hedge			Hedge
		Accounting			Accounting
	(millions)
	At March 31, 2015
	ASSETS
	Current Assets
	Commodity	$	298		$	109		$	407
	Interest rate	13			—			13
	Total current derivative assets(1)	311			109			420
	Noncurrent Assets
	Commodity	140			114			254
	Interest rate	5			—			5
	Total noncurrent derivative assets(2)	145			114			259
	Total derivative assets	$	456		$	223		$	679
	LIABILITIES
	Current Liabilities
	Commodity	$	253		$	118		$	371
	Interest rate	229			—			229
	Total current derivative liabilities	482			118			600
	Noncurrent Liabilities
	Commodity	48			39			87
	Interest Rate	78			—			78
	Total noncurrent derivative liabilities(3)	126			39			165
	Total derivative liabilities	$	608		$	157		$	765
	At December 31, 2014
	ASSETS
	Current Assets
	Commodity	$	281		$	242		$	523
	Interest rate	13			—			13
	Total current derivative assets(1)	294			242			536
	Noncurrent Assets
	Commodity	71			101			172
	Interest rate	11			—			11
	Total noncurrent derivative assets(2)	82			101			183
	Total derivative assets	$	376		$	343		$	719
	LIABILITIES
	Current Liabilities
	Commodity	$	224		$	267		$	491
	Interest rate	100			—			100
	Total current derivative liabilities	324			267			591
	Noncurrent Liabilities
	Commodity	55			46			101
	Interest rate	102			—			102
	Total noncurrent derivative liabilities(3)	157			46			203
	Total derivative liabilities	$	481		$	313		$	794
	-1	Current derivative assets are presented in other current assets in Dominion's Consolidated Balance Sheets.
	-2	Noncurrent derivative assets are presented in other deferred charges and other assets in Dominion’s Consolidated Balance Sheets.
	-3	Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Dominion’s Consolidated Balance Sheets.
Gains and Losses on Derivatives in Cash Flow Hedging Relationships	The following tables present the gains and losses on Dominion's derivatives, as well as where the associated activity is presented in its Consolidated Balance Sheets and Statements of Income:
	Derivatives in cash flow hedging relationships	Amount of Gain			Amount of Gain			Increase
		(Loss)			(Loss) Reclassified			(Decrease) in
		Recognized			from AOCI to			Derivatives
		in AOCI  on			Income			Subject to
		Derivatives						Regulatory
		(Effective						Treatment(2)
		Portion)(1)
	(millions)
	Three Months Ended March 31, 2015
	Derivative Type and Location of Gains (Losses)
	Commodity:
	Operating revenue				$	(92	)
	Purchased gas				(5		)
	Electric fuel and other energy-related purchases				1
	Total commodity	$	(41	)	$	(96	)	$	3
	Interest rate(3)	(58		)	(2		)	(49		)
	Total	$	(99	)	$	(98	)	$	(46	)
	Three Months Ended March 31, 2014
	Derivative Type and Location of Gains (Losses)
	Commodity:
	Operating revenue				$	(269	)
	Purchased gas				(1		)
	Electric fuel and other energy-related purchases				13
	Total commodity	$	(183	)	$	(257	)	$	2
	Interest rate(3)	(47		)	(3		)	(23		)
	Total	$	(230	)	$	(260	)	$	(21	)
	-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.
Schedule of Derivatives not Designated as Hedging Instruments
		Amount of Gain (Loss) Recognized in Income on Derivatives(1)
		Three Months Ended March 31,
	Derivatives not designated as hedging instruments	2015			2014
	(millions)
	Derivative Type and Location of Gains (Losses)
	Commodity
	Operating revenue	$	3		$	(361	)
	Purchased gas	(2		)	7
	Electric fuel and other energy-related purchases	6			133
	Total	$	7		$	(221	)
	-1	Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Dominion’s Consolidated Statements of Income.
Virginia Electric and Power Company
Derivative [Line Items]
Offsetting Assets	The tables below present Virginia Power's derivative asset and liability balances by type of financial instrument, before and after the effects of offsetting:
		31-Mar-15									31-Dec-14
		Gross Amounts of Recognized Assets			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Assets Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets Presented in the Consolidated Balance Sheet
	(millions)
	Commodity contracts:
	Over-the-counter	$	82		$	—		$	82		$	106	$	—	$	106
	Total derivatives, subject to a master netting or similar arrangement	82			—			82			106		—		106
	Total derivatives, not subject to a master netting or similar arrangement	24			—			24			7		—		7
	Total	$	106		$	—		$	106		$	113	$	—	$	113
					31-Mar-15										31-Dec-14
					Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
		Net Amounts of Assets Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Received			Net Amounts		Net Amounts of Assets Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amounts
	(millions)
	Commodity contracts:
	Over-the-counter	$	82		$	4		$	—		$	78	$	106	$	4	$	—	$	102
	Total	$	82		$	4		$	—		$	78	$	106	$	4	$	—	$	102
Offsetting Liabilities
		31-Mar-15									31-Dec-14
		Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet
	(millions)
	Interest rate contracts:
	Over-the-counter	$	128		$	—		$	128		$	72	$	—	$	72
	Commodity contracts:
	Over-the-counter	5			—			5			8		—		8
	Total derivatives, subject to a master netting or similar arrangement	133			—			133			80		—		80
	Total derivatives, not subject to a master netting or similar arrangement	6			—			6			7		—		7
	Total	$	139		$	—		$	139		$	87	$	—	$	87
					31-Mar-15										31-Dec-14
					Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Paid			Net Amounts		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Paid		Net Amounts
	(millions)
	Interest rate contracts:
	Over-the-counter	$	128		$	—		$	—		$	128	$	72	$	—	$	—	$	72
	Commodity contracts:
	Over-the-counter	5			4			—			1		8		4		—		4
	Total	$	133		$	4		$	—		$	129	$	80	$	4	$	—	$	76
Volumes of Derivative Activity	The following table presents the volume of Virginia Power’s derivative activity as of March 31, 2015. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions, except in the case of offsetting transactions, for which they represent the absolute value of the net volume of their long and short positions.
		Current			Noncurrent
	Natural Gas (bcf):
	Fixed price(1)	12			—
	Basis	84			493
	Electricity (MWh):
	FTRs	13,486,569			—
	Capacity (MW)	15,250			3,050
	Interest rate	$	1,000,000,000		$	750,000,000
	-1	Includes options.
Fair Value of Derivatives	The following table presents the fair values of Virginia Power’s derivatives and where they are presented in its Consolidated
	Balance Sheets:
		Fair Value –			Fair Value –			Total Fair Value
		Derivatives under			Derivatives not under
		Hedge			Hedge
		Accounting			Accounting
	(millions)
	At March 31, 2015
	ASSETS
	Current Assets
	Commodity	$	—		$	28		$	28
	Total current derivative assets(1)	—			28			28
	Noncurrent Assets
	Commodity	—			78			78
	Total noncurrent derivative assets(2)	—			78			78
	Total derivative assets	$	—		$	106		$	106
	LIABILITIES
	Current Liabilities
	Commodity	$	1		$	10		$	11
	Interest rate	96			—			96
	Total current derivative liabilities(3)	97			10			107
	Noncurrent Liabilities
	Interest rate	32			—			32
	Total noncurrent derivatives liabilities (4)	32			—			32
	Total derivative liabilities	$	129		$	10		$	139
	31-Dec-14
	ASSETS
	Current Assets
	Commodity	$	—		$	51		$	51
	Total current derivative assets(1)	—			51			51
	Noncurrent Assets
	Commodity	—			62			62
	Total noncurrent derivative assets(2)	—			62			62
	Total derivative assets	$	—		$	113		$	113
	LIABILITIES
	Current Liabilities
	Commodity	$	3		$	12		$	15
	Interest rate	45			—			45
	Total current derivative liabilities(3)	48			12			60
	Noncurrent Liabilities
	Interest rate	27			—			27
	Total noncurrent derivative liabilities(4)	27			—			27
	Total derivative liabilities	$	75		$	12		$	87
	-1	Current derivative assets are presented in other current assets in Virginia Power's Consolidated Balance Sheets.
	-2	Noncurrent derivative assets are presented in other deferred charges and other assets in Virginia Power's Consolidated Balance Sheets.
	-3	Current derivative liabilities are presented in other current liabilities in Virginia Power's Consolidated Balance Sheets.
	-4	Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Virginia Power’s Consolidated Balance Sheets.
Gains and Losses on Derivatives in Cash Flow Hedging Relationships	The following tables present the gains and losses on Virginia Power's derivatives, as well as where the associated activity is presented in its Consolidated Balance Sheets and Statements of Income:
	Derivatives in cash flow hedging relationships	Amount of Gain			Amount of Gain			Increase
		(Loss)			(Loss) Reclassified			(Decrease) in
		Recognized			from AOCI to			Derivatives
		in AOCI  on			Income			Subject to
		Derivatives						Regulatory
		(Effective						Treatment(2)
		Portion)(1)
	(millions)
	Three Months Ended March 31, 2015
	Derivative Type and Location of Gains (Losses)
	Commodity:
	Electric fuel and other energy-related purchases				$	(1	)
	Total commodity	$	—		$	(1	)	$	3
	Interest rate(3)	(6		)	—			(49		)
	Total	$	(6	)	$	(1	)	$	(46	)
	Three Months Ended March 31, 2014
	Derivative Type and Location of Gains (Losses)
	Commodity:
	Electric fuel and other energy-related purchases				$	5
	Total commodity	$	6		$	5		$	2
	Interest rate(3)	(3		)	—			(23		)
	Total	$	3		$	5		$	(21	)
	-1	Amounts deferred into AOCI have no associated effect in Virginia Power’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 Virginia Power’s Consolidated Statements of Income.
	-3	Amounts recorded in Virginia Power’s Consolidated Statements of Income are classified in interest and related charges.
Schedule of Derivatives not Designated as Hedging Instruments
		Amount of Gain (Loss) Recognized in Income on Derivatives(1)
		Three Months Ended March 31,
	Derivatives not designated as hedging instruments	2015			2014
	(millions)
	Derivative Type and Location of Gains (Losses)
	Commodity(2)	$	7		$	119
	Total	$	7		$	119
	-1	Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Virginia Power’s Consolidated Statements of Income.
	-2	Amounts recorded in Virginia Power's Consolidated Statements of Income are classified in electric fuel and other energy-related purchases.
Dominion Gas Holdings, LLC
Derivative [Line Items]
Offsetting Assets	The tables below present Dominion Gas' derivative asset and liability balances by type of financial instrument, before and after the effects of offsetting.
		31-Mar-15									31-Dec-14
		Gross Amounts of Recognized Assets			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Assets Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets Presented in the Consolidated Balance Sheet
	(millions)
	Commodity contracts:
	Over-the-counter	$	3		$	—		$	3		$	2	$	—	$	2
	Total derivatives, subject to a master netting or similar arrangement	$	3		$	—		$	3		$	2	$	—	$	2
					31-Mar-15										31-Dec-14
					Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
		Net Amounts of Assets Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Received			Net Amounts		Net Amounts of Assets Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amounts
	(millions)
	Commodity contracts:
	Over-the-counter	$	3		$	3		$	—		$	—	$	2	$	—	$	—	$	2
	Total	$	3		$	3		$	—		$	—	$	2	$	—	$	—	$	2
Offsetting Liabilities
		31-Mar-15									31-Dec-14
		Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet
	(millions)
	Interest rate contracts:
	Over-the-counter	$	13		$	—		$	13		$	9	$	—	$	9
	Commodity contracts:
	Over-the-counter	3			—			3			—		—		—
	Total derivatives, subject to a master netting or similar arrangement	$	16		$	—		$	16		$	9	$	—	$	9
					31-Mar-15										31-Dec-14
					Gross Amounts Not Offset in the Consolidated Balance Sheet										Gross Amounts Not Offset in the Consolidated Balance Sheet
		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet			Financial Instruments			Cash Collateral Paid			Net Amounts		Net Amounts of Liabilities Presented in the Consolidated Balance Sheet		Financial Instruments		Cash Collateral Paid		Net Amounts
	(millions)
	Interest rate contracts:
	Over-the-counter	$	13		$	—		$	—		$	13	$	9	$	—	$	—	$	9
	Commodity contracts:
	Over-the-counter	3			3			—			—		—		—		—		—
	Total	$	16		$	3		$	—		$	13	$	9	$	—	$	—	$	9
Volumes of Derivative Activity	The following table presents the volume of Dominion Gas' derivative activity as of March 31, 2015. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions, except in the case of offsetting transactions, for which they represent the absolute value of the net volume of their long and short positions.
		Current			Noncurrent
	Natural Gas (bcf):
	Fixed price	7			—
	Basis	8			—
	NGLs (Gal)	72,912,000			—
	Interest rate	$	—		$	250,000,000
Cash Flow Hedges Included Accumulated Other Comprehensive Income (Loss)	The following table presents selected information related to losses on cash flow hedges included in AOCI in Dominion Gas' Consolidated Balance Sheet at March 31, 2015:
		AOCI			Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax			Maximum
		After-Tax						Term
	(millions)
	Commodities:
	NGLs	$	(1	)	$	—		12 months
	Interest rate	(23		)	—			357 months
	Total	$	(24	)	$	—
Fair Value of Derivatives	The following tables present the fair values of Dominion Gas' commodity and interest rate derivatives and where they are presented in its Consolidated Balance Sheets:
		Fair Value  -			Fair Value -			Total
		Derivatives			Derivatives			Fair
		under			not under			Value
		Hedge			Hedge
		Accounting			Accounting
	(millions)
	At March 31, 2015
	ASSETS
	Current Assets
	Commodity	$	2		$	1		$	3
	Total current derivative assets(1)	2			1			3
	Total derivative assets	$	2		$	1		$	3
	LIABILITIES
	Current Liabilities
	Commodity	$	3		$	—		$	3
	Total current derivative liabilities(2)	3			—			3
	Noncurrent Liabilities
	Interest rate	13			—			13
	Total noncurrent derivative liabilities(3)	13			—			13
	Total derivative liabilities	$	16		$	—		$	16
	At December 31, 2014
	ASSETS
	Current Assets
	Commodity	$	2		$	—		$	2
	Total current derivative assets(1)	2			—			2
	Total derivative assets	$	2		$	—		$	2
	LIABILITIES
	Noncurrent Liabilities
	Interest rate	$	9		$	—		$	9
	Total noncurrent derivative liabilities(3)	9			—			9
	Total derivative liabilities	$	9		$	—		$	9
	-1	Current derivative assets are presented in other current assets in Dominion Gas' Consolidated Balance Sheets.
	-2	Current derivative liabilities are presented in other current liabilities in Dominion Gas' Consolidated Balance Sheets.
	-3	Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Dominion Gas’ Consolidated Balance Sheets.
Gains and Losses on Derivatives in Cash Flow Hedging Relationships	The following table presents the gains and losses on Dominion Gas' derivatives, as well as where the associated activity is presented in its Consolidated Balance Sheets and Statements of Income:
	Derivatives in cash flow hedging relationships	Amount of			Amount of
		Gain (Loss)			Gain (Loss)
		Recognized			Reclassified
		in AOCI on			from AOCI
		Derivatives			to Income
		(Effective
		Portion)(1)
	(millions)
	Three Months Ended March 31, 2015
	Derivative Type and Location of Gains (Losses)
	Commodity
	Operating revenue				$	—
	Total commodity	$	(2	)	$	—
	Interest rate(2)	(4		)	—
	Total	$	(6	)	$	—
	Three Months Ended March 31, 2014
	Derivative Type and Location of Gains (Losses)
	Commodity
	Operating revenue				$	(6	)
	Purchased gas				(2		)
	Total commodity	$	1		$	(8	)
	Interest rate(2)	(14		)	—
	Total	$	(13	)	$	(8	)
	-1	Amounts deferred into AOCI have no associated effect in Dominion Gas' Consolidated Statements of Income.
	-2	Amounts recorded in Dominion Gas' Consolidated Statements of Income are classified in interest and related charges.

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2015
Gain (Loss) on Investments [Line Items]
Available-For-Sale Securities	Dominion’s decommissioning trust funds are summarized below:
		Amortized			Total  Unrealized Gains(1)			Total  Unrealized				Fair Value
		Cost						Losses(1)
	(millions)
	31-Mar-15
	Marketable equity securities:
	U.S. large cap	$	1,265		$	1,338		$	—			$	2,603
	Marketable debt securities:
	Corporate bonds	440			23			(1		)		462
	U.S. Treasury securities and agency debentures	576			17			(1		)		592
	State and municipal	356			24			—				380
	Other	122			—			—				122
	Cost method investments	77			—			—				77
	Cash equivalents and other(2)	8			—			—				8
	Total	$	2,844		$	1,402		$	(2	)	(3)	$	4,244
	December 31, 2014
	Marketable equity securities:
	U.S. large cap	$	1,273		$	1,353		$	—			$	2,626
	Marketable debt securities:
	Corporate bonds	424			19			(2		)		441
	U.S. Treasury securities and agency debentures	597			13			(4		)		606
	State and municipal	332			23			—				355
	Other	66			—			—				66
	Cost method investments	86			—			—				86
	Cash equivalents and other(2)	16			—			—				16
	Total	$	2,794		$	1,408		$	(6	)	(3)	$	4,196
	-1	Included in AOCI and the nuclear decommissioning trust regulatory liability.
	-2	Includes pending sales of securities of $3 million at both March 31, 2015 and December 31, 2014.
	-3	The fair value of securities in an unrealized loss position was $239 million and $379 million at March 31, 2015 and December 31, 2014, respectively.
Investments Classified by Contractual Maturity Date	The fair value of Dominion’s marketable debt securities held in nuclear decommissioning trust funds at March 31, 2015 by contractual maturity is as follows:
		Amount
	(millions)
	Due in one year or less	$	233
	Due after one year through five years	383
	Due after five years through ten years	435
	Due after ten years	505
	Total	$	1,556
Marketable Securities	Presented below is selected information regarding Dominion’s marketable equity and debt securities held in nuclear decommissioning trust funds.
		Three Months Ended March 31,
		2015			2014
	(millions)
	Proceeds from sales	$	337		$	442
	Realized gains(1)	56			38
	Realized losses(1)	17			6
	-1	Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.
Virginia Electric and Power Company
Gain (Loss) on Investments [Line Items]
Available-For-Sale Securities	Virginia Power’s decommissioning trust funds are summarized below:
		Amortized			Total  Unrealized			Total  Unrealized				Fair Value
		Cost			Gains(1)			Losses(1)
	(millions)
	31-Mar-15
	Marketable equity securities:
	U.S. large cap	$	573		$	592		$	—			$	1,165
	Marketable debt securities:
	Corporate bonds	247			11			—				258
	U.S. Treasury securities and agency debentures	190			3			(1		)		192
	State and municipal	209			14			—				223
	Other	31			—			—				31
	Cost method investments	77			—			—				77
	Cash equivalents and other(2)	4			—			—				4
	Total	$	1,331		$	620		$	(1	)	(3)	$	1,950
	December 31, 2014
	Marketable equity securities:
	U.S. large cap	$	563		$	594		$	—			$	1,157
	Marketable debt securities:
	Corporate bonds	242			9			(1		)		250
	U.S. Treasury securities and agency debentures	197			3			(2		)		198
	State and municipal	197			13			—				210
	Other	23			—			—				23
	Cost method investments	86			—			—				86
	Cash equivalents and other(2)	6			—			—				6
	Total	$	1,314		$	619		$	(3	)	(3)	$	1,930
	-1	Included in AOCI and the nuclear decommissioning trust regulatory liability.
	-2	Includes pending sales of securities of $4 million and $6 million at March 31, 2015 and December 31, 2014, respectively.
	-3	The fair value of securities in an unrealized loss position was $120 million and $170 million at March 31, 2015 and December 31, 2014, respectively.
Investments Classified by Contractual Maturity Date	The fair value of Virginia Power’s marketable debt securities at March 31, 2015 by contractual maturity is as follows:
		Amount
	(millions)
	Due in one year or less	$	51
	Due after one year through five years	168
	Due after five years through ten years	245
	Due after ten years	240
	Total	$	704
Marketable Securities	Presented below is selected information regarding Virginia Power’s marketable equity and debt securities.
		Three Months Ended March 31,
		2015			2014
	(millions)
	Proceeds from sales	$	133		$	204
	Realized gains(1)	18			19
	Realized losses(1)	11			3
	-1	Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.
Dominion Gas Holdings, LLC
Gain (Loss) on Investments [Line Items]
Equity Method Investments	Dominion Gas accounts for the following investment under the equity method of accounting:
	Company	Ownership%		Investment Balance						Description
				31-Mar-15			31-Dec-14
	(millions)
	Iroquois	24.72	%	$	103		$	107		Gas transmission system
	Total			$	103		$	107

Regulatory_Assets_and_Liabilit1

Regulatory Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2015
Regulatory Assets and Liabilities Disclosure [Abstract]
Schedule Of Regulatory Assets And Liabilities	Regulatory assets and liabilities include the following:
		31-Mar-15		31-Dec-14
	(millions)
	Dominion
	Regulatory assets:
	Deferred cost of fuel used in electric generation(1)	$	122	$	79
	Deferred rate adjustment clause costs(2)	108		124
	Deferred nuclear refueling outage costs(3)	57		44
	Unrecovered gas costs(4)	16		36
	Other	59		64
	Regulatory assets-current(5)	362		347
	Unrecognized pension and other postretirement benefit costs(6)	1,034		1,050
	Deferred rate adjustment clause costs(2)	216		250
	Derivatives(7)	150		101
	Income taxes recoverable through future rates(8)	136		133
	Other	129		108
	Regulatory assets-non-current	1,665		1,642
	Total regulatory assets	$	2,027	$	1,989
	Regulatory liabilities:
	PIPP(9)	$	63	$	71
	Other	43		99
	Regulatory liabilities-current(10)	106		170
	Provision for future cost of removal and AROs(11)	1,100		1,072
	Nuclear decommissioning trust(12)	822		815
	Other	197		104
	Regulatory liabilities-non-current	2,119		1,991
	Total regulatory liabilities	$	2,225	$	2,161
	Virginia Power
	Regulatory assets:
	Deferred cost of fuel used in electric generation(1)	$	122	$	79
	Deferred rate adjustment clause costs(2)	106		117
	Deferred nuclear refueling outage costs(3)	57		44
	Other	54		58
	Regulatory assets-current	339		298
	Deferred rate adjustment clause costs(2)	141		179
	Derivatives(7)	150		101
	Income taxes recoverable through future rates(8)	103		100
	Other	70		59
	Regulatory assets-non-current	464		439
	Total regulatory assets	$	803	$	737
	Regulatory liabilities:
	Other	$	23	$	90
	Regulatory liabilities-current(10)	23		90
	Provision for future cost of removal(11)	864		852
	Nuclear decommissioning trust(12)	822		815
	Other	83		16
	Regulatory liabilities-non-current	1,769		1,683
	Total regulatory liabilities	$	1,792	$	1,773
	Dominion Gas
	Regulatory assets:
	Unrecovered gas costs(4)	$	13	$	29
	Deferred rate adjustment clause costs(2)	2		7
	Other	1		2
	Regulatory assets-current(5)	16		38
	Unrecognized pension and other postretirement benefit costs(6)	239		242
	Deferred rate adjustment clause costs(2)	75		71
	Income taxes recoverable through future rates(8)	24		24
	Other	52		42
	Regulatory assets-non-current	390		379
	Total regulatory assets	$	406	$	417
	Regulatory liabilities:
	PIPP(9)	$	63	$	71
	Other	16		4
	Regulatory liabilities-current(10)	79		75
Provision for future cost of removal and AROs(11)	172		172
Other	26		20
Regulatory liabilities-non-current(13)	198		192
Total regulatory liabilities	$	277	$	267
-1	Primarily reflects deferred fuel expenses for the Virginia jurisdiction of Virginia Power's generation operations. See Note 12 for more information.
-2	Reflects deferrals under the electric transmission FERC formula rate and the deferral of costs associated with certain current and prospective rider projects for Virginia Power. Reflects deferrals of costs associated with certain current and prospective rider projects for Dominion Gas. See Note 12 for more information.
-3	Legislation enacted in Virginia in April 2014 requires Virginia Power to defer operation and maintenance costs incurred in connection with the refueling of any nuclear-powered generating plant. These deferred costs will be amortized over the refueling cycle, not to exceed 18 months.
-4	Reflects unrecovered gas costs at regulated gas operations, which are recovered through filings with the applicable regulatory authority.
-5	Current regulatory assets are presented in other current assets in Dominion's and Dominion Gas' Consolidated Balance Sheets.
-6	Represents unrecognized pension and other postretirement employee benefit costs expected to be recovered through future rates generally over the expected remaining service period of plan participants by certain of Dominion's and Dominion Gas' rate-regulated subsidiaries.
-7	For jurisdictions subject to cost-based rate regulation, changes in the fair value of derivative instruments result in the recognition of regulatory assets or regulatory liabilities as they are expected to be recovered from or refunded to customers.
-8	Amounts to be recovered through future rates to pay income taxes that become payable when rate revenue is provided to recover AFUDC-equity and depreciation of property, plant and equipment for which deferred income taxes were not recognized for ratemaking purposes, including amounts attributable to tax rate changes.
-9	Under PIPP, eligible customers can make reduced payments based on their ability to pay. The difference between the customer's total bill and the PIPP plan amount is deferred and collected or returned annually under the PIPP rider according to East Ohio tariff provisions.
-10	Current regulatory liabilities are presented in other current liabilities in the Companies' Consolidated Balance Sheets.
-11	Rates charged to customers by the Companies' regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement.
-12	Primarily reflects a regulatory liability representing amounts collected from Virginia jurisdictional customers and placed in external trusts (including income, losses and changes in fair value thereon) for the future decommissioning of Virginia Power's utility nuclear generation stations, in excess of the related AROs.
-13	Noncurrent regulatory liabilities are presented in other deferred credits and other liabilities in Dominion Gas' Consolidated Balance Sheets.

Significant_Financing_Transact1

Significant Financing Transactions (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Instrument [Line Items]
Schedule of Line of Credit Facilities	At March 31, 2015, Dominion’s commercial paper and letters of credit outstanding, as well as its capacity available under credit facilities, were as follows:
		Facility		Outstanding		Outstanding		Facility
		Limit		Commercial		Letters of		Capacity
				Paper		Credit		Available
	(millions)
	Joint revolving credit facility(1)	$	4,000	$	3,112	$	—	$	888
	Joint revolving credit facility(2)	500		88		48		364
	Total	$	4,500	$	3,200	$	48	$	1,252
	-1	This credit facility has a maturity date of April 2019, and 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	This credit facility has a maturity date of April 2019, and can be used to support bank borrowings, commercial paper and letter of credit issuances.
Virginia Electric and Power Company
Debt Instrument [Line Items]
Schedule of Line of Credit Facilities	At March 31, 2015, Virginia Power’s share of commercial paper and letters of credit outstanding, as well as its capacity available under its joint credit facilities with Dominion and Dominion Gas, were as follows:
		Facility		Outstanding		Outstanding		Facility
		Sub-limit		Commercial		Letters of		Sub-limit Capacity
				Paper		Credit		Available
	(millions)
	Joint revolving credit facility(1)	$	1,500	$	1,500	$	—	$	—
	Joint revolving credit facility(2)	250		88		—		162
	Total	$	1,750	$	1,588	$	—	$	162
	-1	This credit facility has a maturity date of April 2019, and 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. In January 2015, Virginia Power increased its sub-limit from $1.25 billion to $1.50 billion.
	-2	This credit facility has a maturity date of April 2019, and 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.
Dominion Gas Holdings, LLC
Debt Instrument [Line Items]
Schedule of Line of Credit Facilities	At March 31, 2015, Dominion Gas' share of commercial paper and letters of credit outstanding, as well as its capacity available under its joint credit facilities with Dominion and Virginia Power were as follows:
		Facility		Outstanding		Outstanding		Facility
		Sub-limit		Commercial		Letters of		Sub-limit Capacity
				Paper		Credit		Available
	(millions)
	Joint revolving credit facility(1)	$	500	$	280	$	—	$	220
	Joint revolving credit facility(2)	—		—		—		—
	Total	$	500	$	280	$	—	$	220
	-1	This credit facility has a maturity date of April 2019, and 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. Dominion Gas' current sub-limit under this credit facility can be increased or decreased multiple times per year, up to a maximum of $1.0 billion.
	-2	This credit facility has a maturity date of April 2019, and can be used to support bank borrowings, commercial paper and letter of credit issuances. Dominion Gas' current sub-limit under this credit facility can be increased or decreased multiple times per year.

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule Of Subsidiary Guarantees	At March 31, 2015, Dominion had issued the following subsidiary guarantees:
		Stated Limit		Value(1)
	(millions)
	Subsidiary debt(2)	$	27	$	27
	Commodity transactions(3)	2,816		1,075
	Nuclear obligations(4)	199		79
	Cove Point(5)	1,910		—
	Solar(6)	531		171
	Other(7)	528		36
	Total	$	6,011	$	1,388
	-1	Represents the estimated portion of the guarantee's stated limit that is utilized as of March 31, 2015 based upon prevailing economic conditions and fact patterns specific to each guarantee arrangement. For those guarantees related to obligations that are recorded as liabilities by Dominion's subsidiaries, the value includes the recorded amount.
	-2	Guarantee of debt of a DEI subsidiary. In the event of default by the subsidiary, Dominion would be obligated to repay such amounts.
	-3	Guarantees related to commodity commitments of certain subsidiaries, including subsidiaries of Virginia Power, Dominion Gas and DEI. These guarantees were provided to counterparties in order to facilitate physical and financial transactions in gas, oil, electricity, pipeline capacity, transportation and related commodities and services. If any of these subsidiaries fail to perform or pay under the contracts and the counterparties seek performance or payment, Dominion would be obligated to satisfy such obligation. Dominion and its subsidiaries receive similar guarantees as collateral for credit extended to others. The value provided includes certain guarantees that do not have stated limits.
	-4	Guarantees related to certain DEI subsidiaries' potential retrospective premiums that could be assessed if there is a nuclear incident under Dominion's nuclear insurance programs and guarantees for a DEI subsidiary's and Virginia Power's commitment to buy nuclear fuel. Excludes Dominion's agreement to provide up to $150 million and $60 million to two DEI subsidiaries to pay the operating expenses of Millstone (in the event of a prolonged outage) and Kewaunee, respectively, as part of satisfying certain NRC requirements concerned with ensuring adequate funding for the operations of nuclear power stations. The agreement for Kewaunee also provides for funds through the completion of decommissioning.
	-5	Guarantees related to Cove Point, in support of terminal services, transportation and construction. Two of the guarantees have no stated limit, one guarantee has a $150 million limit, and one guarantee has a $1.75 billion aggregate limit with an annual draw limit of $175 million.
	-6	Includes guarantees to facilitate the development of solar projects including guarantees to support the issuance of full notice to proceed under EPC agreements. Includes certain guarantees that do not have stated limits. Also includes guarantees entered into by DEI on behalf of certain subsidiaries to facilitate the acquisition and development of solar projects.
	-7	Guarantees related to other miscellaneous contractual obligations such as leases, environmental obligations and construction projects. Also includes guarantees related to certain DEI subsidiaries' obligations for equity capital contributions and energy generation associated with Fowler Ridge and NedPower. As of March 31, 2015, Dominion's maximum remaining cumulative exposure under these equity funding agreements is $63 million through 2019 and its maximum annual future contributions could range from approximately $4 million to $19 million. The value provided includes certain guarantees that do not have stated limits.

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2015
Virginia Electric and Power Company
Related Party Transaction [Line Items]
Transactions With Affiliates	Presented below are Virginia Power's significant transactions with DRS and other affiliates:
		Three Months Ended March 31,
		2015		2014
	(millions)
	Commodity purchases from affiliates	$	252	$	202
	Services provided by affiliates(1)	110		108
	Services provided to affiliates	5		5
	-1	Includes capitalized expenditures.
Dominion Gas Holdings, LLC
Related Party Transaction [Line Items]
Schedule of Related Party Transactions	Dominion Gas transacts with affiliates for certain quantities of natural gas and other commodities at market prices in the ordinary course of business. Additionally, Dominion Gas provides transportation and storage services to affiliates. Dominion Gas also enters into certain other contracts with affiliates, which are presented separately from contracts involving commodities or services. As of March 31, 2015 and December 31, 2014, all of Dominion Gas' commodity derivatives were with affiliates. See Notes 7 and 9 for more information. See Note 10 for information regarding sales of assets to an affiliate.
	Dominion Gas participates in certain Dominion benefit plans as described in Note 18.
	DRS and other affiliates provide accounting, legal, finance and certain administrative and technical services to Dominion Gas. Dominion Gas provides certain services to related parties, including technical services. The costs of these services follow:
		Three Months Ended March 31,
		2015		2014
	(millions)
	Purchases of natural gas and transportation and storage services from affiliates	$	2	$	18
	Sales of natural gas and transportation and storage services to affiliates	18		21
	Services provided by related parties(1)	34		28
	Services provided to related parties	20		13
	-1	Includes capitalized expenditures.
	The following table presents affiliated and related party activity reflected in Dominion Gas' Consolidated Balance Sheets:
		31-Mar-15		31-Dec-14
	(millions)
	Customer receivables from related parties(1)	$	11	$	22
	Imbalances receivable from affiliates(2)	4		3
	Affiliated notes receivable(3)	10		9
	(1) Includes $5 million and $17 million due from Atlantic Coast Pipeline, a related party VIE, at March 31, 2015 and December 31, 2014, respectively.
	(2) Amounts are presented in other current assets in Dominion Gas' Consolidated Balance Sheets.
	(3) Amounts are presented in other deferred charges and other assets in Dominion Gas' Consolidated Balance Sheets.

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost	The components of Dominion's provision for net periodic benefit cost (credit) were as follows:
		Pension Benefits						Other Postretirement Benefits
		2015			2014			2015			2014
	(millions)
	Three Months Ended March 31,
	Service cost	$	32		$	29		$	10		$	8
	Interest cost	72			72			17			17
	Expected return on plan assets	(133		)	(125		)	(29		)	(28		)
	Amortization of prior service cost (credit)	—			1			(7		)	(7		)
	Amortization of net actuarial loss	40			28			1			—
	Net periodic benefit cost (credit)	$	11		$	5		$	(8	)	$	(10	)
Dominion Gas Holdings, LLC
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost	The components of Dominion Gas' provision for net periodic benefit credit for employees represented by collective bargaining units were as follows:
		Pension Benefits						Other Postretirement Benefits
		2015			2014			2015			2014
	(millions)
	Three Months Ended March 31,
	Service cost	$	3		$	3		$	2		$	1
	Interest cost	7			7			3			3
	Expected return on plan assets	(31		)	(29		)	(6		)	(5		)
	Amortization of net actuarial loss	5			5			1			—
	Net periodic benefit credit	$	(16	)	$	(14	)	$	—		$	(1	)

Operating_Segments_Tables

Operating Segments (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting Information [Line Items]
Segment Reporting Disclosure Other Information	A description of the operations included in the Companies’ primary operating segments is as follows:
	Primary Operating Segment	Description of Operations	Dominion	Virginia Power	Dominion Gas
	DVP	Regulated electric distribution	X	X
		Regulated electric transmission	X	X
	Dominion Generation	Regulated electric fleet	X	X
		Merchant electric fleet	X
		Nonregulated retail energy marketing	X
	Dominion Energy	Gas transmission and storage(1)	X		X
		Gas distribution and storage	X		X
		Gas gathering and processing	X		X
		LNG import and storage	X
	-1	Includes remaining producer services activities for Dominion.
Schedule of Segment Reporting Information, by Segment	The following table presents segment information pertaining to Dominion’s operations:
		DVP			Dominion			Dominion			Corporate			Adjustments/Eliminations			Consolidated
					Generation			Energy			and Other						Total
	(millions)
	Three Months Ended March 31, 2015
	Total revenue from external customers	$	564		$	2,122		$	379		$	(13	)	$	357		$	3,409
	Intersegment revenue	5			26			360			142			(533		)	—
	Total operating revenue	569			2,148			739			129			(176		)	3,409
	Net income (loss) attributable to Dominion	140			282			207			(93		)	—			536
	Three Months Ended March 31, 2014
	Total revenue from external customers	$	502		$	2,260		$	362		$	(2	)	$	508		$	3,630
	Intersegment revenue	2			24			489			147			(662		)	—
	Total operating revenue	504			2,284			851			145			(154		)	3,630
	Net income (loss) attributable to Dominion	131			309			208			(269		)	—			379
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment	The following table presents segment information pertaining to Virginia Power’s operations:
		DVP			Dominion			Corporate			Consolidated
					Generation			and Other			Total
	(millions)
	Three Months Ended March 31, 2015
	Operating revenue	$	567		$	1,585		$	(15	)	$	2,137
	Net income (loss)	140			190			(61		)	269
	Three Months Ended March 31, 2014
	Operating revenue	$	502		$	1,481		$	—		$	1,983
	Net income	134			189			1			324
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment	The following table presents segment information pertaining to Dominion Gas' operations:
		Dominion Energy			Corporate and Other			Consolidated Total
	(millions)
	Three Months Ended March 31, 2015
	Operating revenue	$	531		$	—		$	531
	Net income (loss)	164			(3		)	161
	Three Months Ended March 31, 2014
	Operating revenue	$	569		$	—		$	569
	Net income (loss)	166			(2		)	164

Significant_Accounting_Policie2

Significant Accounting Policies (Narrative) (Details) (Dominion Midstream Partners, LP, IPO)	1 Months Ended
	Oct. 31, 2014
Dominion Midstream Partners, LP | IPO
Subsidiary, Sale of Stock [Line Items]
Percentage of limited partner interests in Dominion Midstream Partners, LP	68.50%

Acquisitions_and_Dispositions_

Acquisitions and Dispositions (Narrative) (Details) (USD $)	3 Months Ended		1 Months Ended			12 Months Ended			1 Months Ended		0 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2013	Dec. 31, 2014		Dec. 31, 2013	Apr. 30, 2015	Jan. 31, 2015	Apr. 01, 2015
				acre	acre			acre	MW	mi
				Field	Field			Field
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill	$3,294			$3,294		$3,044	[1]
Proceeds from assignments of Marcellus acreage	27	0
Electric Retail Energy Marketing Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from assignments of Marcellus acreage			187
Gain on sale			100
After tax gain on sale			57
Write off of goodwill			31
Dominion Gas Holdings, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill	542			542		542	[2]
Dominion Gas Holdings, LLC | Marcellus Acreage
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Acres of Marcellus Shale development rights conveyed	11,000			11,000	79,000			79,000
Number of natural gas storage fields	1			1	1			1
Total payments to DTI per agreement (up to 200 million)	27			27	200			200
Duration of conveyance of rights					9 years
Cash proceeds from sale of assets				27		16		82
Deferred revenue						85
Gain on sale of assets				27
After tax gain on sale of assets				16
Dominion Gas Holdings, LLC | Marcellus Acreage | Amended Agreement to Extend Conveyance of Development Rights
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Acres of Marcellus Shale development rights conveyed	9,000			9,000
Duration of conveyance of rights				2 years
Deferred revenue	40			40
Deferred revenue recognized from conveyance of rights				43
Deferred revenue recognized from conveyance of rights, after tax				27
Acquisition of Solar Development Projects
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of equity interests acquired		100.00%	100.00%
Number of solar development projects			6
Acquisition price			50
Expected cost of projects		446	446
Expected generation capacity of facilities			139
EC&R Solar PV LLC | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of equity interests acquired									100.00%
Acquisition price									66
Expected cost of projects									69
Expected generation capacity of facilities									20
EDF Renewable Development, Inc. | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of equity interests acquired									100.00%
Acquisition price									106
Expected cost of projects									111
Expected generation capacity of facilities									24
Acquisition of CGT
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of equity interests acquired										100.00%
Acquisition price										495
Length of natural gas pipeline										1,500
Net property, plant and equipment acquired										277
Goodwill										250
Goodwill expected to be deductible for income tax purposes										225
Regulatory liabilities assumed										38
Acquisition of CGT | Dominion Midstream Partners, LP | Affiliated Entity | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Acquisition price											495
Percentage of equity interests in DCGT contributed in Dominion Midstream											100.00%
Acquisition of CGT | Dominion Midstream Partners, LP | Affiliated Entity | Senior unsecured promissory note payable | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Term of senior unsecured promissory note payable											2 years
Senior unsecured promissory note payable											295
Annual interest rate for senior unsecured promissory note payable											0.60%
Acquisition of CGT | Dominion Midstream Partners, LP | Affiliated Entity | Partnership Interest | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received, common units of Dominion Midstream											5,112,139
Consideration received, value of common units of Dominion Midstream											$200
Number of trading days used to determine weighted average trading price											10 days
Price per unit											$39.12
[1]	Dominion’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[2]	Dominion Gas’ Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.

Operating_Revenue_Operating_Re

Operating Revenue (Operating Revenue) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Electric sales:
Regulated	$2,112		$1,951
Nonregulated	406		854
Gas sales:
Regulated	116		147
Nonregulated	208		117
Gas transportation and storage	471		444
Other	96		117
Total operating revenue	3,409		3,630
Virginia Electric and Power Company
Electric sales:
Regulated	2,112		1,951
Gas sales:
Other	25		32
Total operating revenue	2,137	[1]	1,983	[1]
Dominion Gas Holdings, LLC
Gas sales:
Regulated	57		83
Nonregulated	3		9
Gas transportation and storage	412		396
NGL revenue	29		57
Other	30		24
Total operating revenue	$531	[2]	$569	[2]
[1]	See Note 17 for amounts attributable to affiliates.
[2]	See Note 17 for amounts attributable to related parties.

Income_Taxes_Reconciliation_of

Income Taxes (Reconciliation of Income Taxes at the U.S. Statutory Federal Rate as Compared to the Income Tax Expense Recorded in Our Consolidated Statements of Income) (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating Loss Carryforwards [Line Items]
U.S. statutory rate	35.00%	35.00%
Increases (reductions) resulting from:
State taxes, net of federal benefit	2.90%	2.70%
Investment tax credits	-0.80%	-3.60%
Production tax credits	-0.80%	-0.60%
Other, net	-0.60%	-0.80%
Effective tax rate	35.70%	32.70%
Virginia Electric and Power Company
Operating Loss Carryforwards [Line Items]
U.S. statutory rate	35.00%	35.00%
Increases (reductions) resulting from:
State taxes, net of federal benefit	3.80%	3.80%
Investment tax credits	0.00%	0.00%
Production tax credits	-0.40%	-0.80%
Other, net	-0.70%	-0.20%
Effective tax rate	37.70%	37.80%
Dominion Gas Holdings, LLC
Operating Loss Carryforwards [Line Items]
U.S. statutory rate	35.00%	35.00%
Increases (reductions) resulting from:
State taxes, net of federal benefit	4.00%	3.40%
Investment tax credits	0.00%	0.00%
Production tax credits	0.00%	0.00%
Other, net	-0.10%	0.30%
Effective tax rate	38.90%	38.70%

Earnings_Per_Share_Calculation

Earnings Per Share (Calculation of Our Basic and Diluted EPS) (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Earnings Per Share [Abstract]
Net income attributable to Dominion	$536		$379
Average shares of common stock outstanding - Basic (shares)	587,900,000		581,600,000
Net effect of potentially dilutive securities (shares)	2,000,000	[1]	1,300,000	[1]
Average shares of common stock outstanding - Diluted (shares)	589,900,000		582,900,000
Earnings Per Common Share – Basic and Diluted	$0.91		$0.65
Potentially dilutive securities excluded from the calculation of diluted EPS			0
[1]	Dilutive securities consist primarily of the 2013 Equity Units for 2015 and contingently convertible senior notes and the 2013 Equity Units for 2014. See Note 14 in this report and Note 17 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2014 for more information.

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Schedule of Changes in AOCI by Component Net of Tax) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	($416)	[1]	($324)
Other comprehensive income before reclassifications: gains (losses)	-44		-132
Amounts reclassified from AOCI: (gains) losses	51	[2]	157	[2]
Total other comprehensive income	7		25
Ending balance	-409		-299
Dominion Gas Holdings, LLC
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	-86	[3],[4]	-58
Other comprehensive income before reclassifications: gains (losses)	-4		-8
Amounts reclassified from AOCI: (gains) losses	1	[2]	6	[2]
Total other comprehensive income	-3		-2
Ending balance	-89	[3]	-60
Deferred gains and losses on derivatives-hedging activities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	-178		-288
Other comprehensive income before reclassifications: gains (losses)	-58		-150
Amounts reclassified from AOCI: (gains) losses	59	[2]	160	[2]
Total other comprehensive income	1		10
Ending balance	-177		-278
Deferred gains and losses on derivatives-hedging activities | Dominion Gas Holdings, LLC
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	-20		3
Other comprehensive income before reclassifications: gains (losses)	-4		-8
Amounts reclassified from AOCI: (gains) losses	0	[2]	5	[2]
Total other comprehensive income	-4		-3
Ending balance	-24		0
Unrealized gains and losses on investment securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	548		474
Other comprehensive income before reclassifications: gains (losses)	15		29
Amounts reclassified from AOCI: (gains) losses	-21	[2]	-11	[2]
Total other comprehensive income	-6		18
Ending balance	542		492
Unrecognized pension and other postretirement benefit costs
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	-782		-510
Other comprehensive income before reclassifications: gains (losses)	0		-4
Amounts reclassified from AOCI: (gains) losses	13	[2]	8	[2]
Total other comprehensive income	13		4
Ending balance	-769		-506
Unrecognized pension and other postretirement benefit costs | Dominion Gas Holdings, LLC
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	-66		-61
Other comprehensive income before reclassifications: gains (losses)	0		0
Amounts reclassified from AOCI: (gains) losses	1	[2]	1	[2]
Total other comprehensive income	1		1
Ending balance	-65		-60
Other comprehensive income (loss) from equity method investee
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	-4		0
Other comprehensive income before reclassifications: gains (losses)	-1		-7
Amounts reclassified from AOCI: (gains) losses	0	[2]	0	[2]
Total other comprehensive income	-1		-7
Ending balance	($5)		($7)
[1]	Dominion’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[2]	See table below for details about these reclassifications.
[3]	See Note 17 for amounts attributable to related parties.
[4]	Dominion Gas’ Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Schedule of Reclassifications out of AOCI by Component Net of Tax) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Operating Revenue	$3,409		$3,630
Purchased gas	250		540
Electric fuel and other energy-related purchases	953		1,334
Interest and related charges	223		237
Other income	60		40
Income from continuing operations including noncontrolling interests before income tax expense	839		571
Income tax expense	-299		-186
Dominion Gas Holdings, LLC
Accumulated Other Comprehensive Income (Loss) [Line Items]
Operating Revenue	531	[1]	569	[1]
Purchased gas	74	[1]	137	[1]
Interest and related charges	17		6
Other income	9		8
Income from continuing operations including noncontrolling interests before income tax expense	263		267
Income tax expense	-102		-103
Deferred gains and losses on derivatives-hedging activities | Amounts reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income from continuing operations including noncontrolling interests before income tax expense	98		260
Income tax expense	-39		-100
Income from continuing operations including noncontrolling interests	59		160
Deferred gains and losses on derivatives-hedging activities | Amounts reclassified from AOCI | Dominion Gas Holdings, LLC
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income from continuing operations including noncontrolling interests before income tax expense			8
Income tax expense			-3
Income from continuing operations including noncontrolling interests			5
Unrealized gains and losses on investment securities | Amounts reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income	-39		-20
Impairment	6		2
Income from continuing operations including noncontrolling interests before income tax expense	-33		-18
Income tax expense	12		7
Income from continuing operations including noncontrolling interests	-21		-11
Unrecognized pension and other postretirement benefit costs | Amounts reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Prior service (credit) costs	-3		-3
Actuarial (gains) losses	25		17
Income from continuing operations including noncontrolling interests before income tax expense	22		14
Income tax expense	-9		-6
Income from continuing operations including noncontrolling interests	13		8
Unrecognized pension and other postretirement benefit costs | Amounts reclassified from AOCI | Dominion Gas Holdings, LLC
Accumulated Other Comprehensive Income (Loss) [Line Items]
Actuarial (gains) losses	2		2
Income from continuing operations including noncontrolling interests before income tax expense	2		2
Income tax expense	-1		-1
Income from continuing operations including noncontrolling interests	1		1
Commodity contracts | Deferred gains and losses on derivatives-hedging activities | Amounts reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Operating Revenue	92		269
Purchased gas	5		1
Electric fuel and other energy-related purchases	-1		-13
Commodity contracts | Deferred gains and losses on derivatives-hedging activities | Amounts reclassified from AOCI | Dominion Gas Holdings, LLC
Accumulated Other Comprehensive Income (Loss) [Line Items]
Operating Revenue			6
Purchased gas			2
Interest rate contracts | Deferred gains and losses on derivatives-hedging activities | Amounts reclassified from AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and related charges	$2		$3
[1]	See Note 17 for amounts attributable to related parties.

Fair_Value_Measurements_Fair_V

Fair Value Measurements Fair Value Measurements (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gains or losses included in earnings in Level 3 fair value category	$0	$0
Dominion Gas Holdings, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gains or losses included in earnings in Level 3 fair value category	$0	$0

Fair_Value_Measurements_Fair_V1

Fair Value Measurements Fair Value, Option, Quantitative Disclosures (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	$679		$719
Fair Value of Derivative Liabilities	765		794
Level 3
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	94
Fair Value of Derivative Liabilities	18
Level 3 | Natural Gas | Physical and Financial Forwards and Futures:
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	85	[1]
Fair Value of Derivative Liabilities	12	[1]
Level 3 | Natural Gas | Physical and Financial Options:
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	5
Fair Value of Derivative Liabilities	2
Level 3 | FTRs | Physical and Financial Forwards and Futures:
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	4
Fair Value of Derivative Liabilities	4
Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | Natural Gas | Physical and Financial Forwards and Futures: | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	-2	[2]
Credit spread (percentage)	1.00%	[3]
Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | Natural Gas | Physical and Financial Forwards and Futures: | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	6	[2]
Credit spread (percentage)	5.00%	[3]
Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | Natural Gas | Physical and Financial Forwards and Futures: | Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	-1	[2],[4]
Credit spread (percentage)	2.00%	[3],[4]
Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | Natural Gas | Physical and Financial Options: | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	2	[3]
Price Volatility (percentage)	21.00%	[5]
Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | Natural Gas | Physical and Financial Options: | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	4	[3]
Price Volatility (percentage)	76.00%	[5]
Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | Natural Gas | Physical and Financial Options: | Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	3	[2],[4]
Price Volatility (percentage)	32.00%	[4],[5]
Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | FTRs | Physical and Financial Forwards and Futures: | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	-5	[2]
Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | FTRs | Physical and Financial Forwards and Futures: | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	7	[2]
Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | FTRs | Physical and Financial Forwards and Futures: | Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	1	[2],[4]
Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | Natural Gas | Physical and Financial Forwards and Futures: | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	-2	[2]
Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | Natural Gas | Physical and Financial Forwards and Futures: | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	4	[2]
Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | Natural Gas | Physical and Financial Forwards and Futures: | Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	2	[2],[4]
Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | Natural Gas | Physical and Financial Options: | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	2	[2]
Price Volatility (percentage)	21.00%	[5]
Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | Natural Gas | Physical and Financial Options: | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	4	[2]
Price Volatility (percentage)	76.00%	[5]
Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | Natural Gas | Physical and Financial Options: | Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	3	[2],[4]
Price Volatility (percentage)	32.00%	[4],[5]
Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | FTRs | Physical and Financial Forwards and Futures: | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	-2	[2]
Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | FTRs | Physical and Financial Forwards and Futures: | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	5	[2]
Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | FTRs | Physical and Financial Forwards and Futures: | Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	1	[2],[4]
Virginia Electric and Power Company
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	106		113
Fair Value of Derivative Liabilities	139		87
Virginia Electric and Power Company | Level 3
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	82
Fair Value of Derivative Liabilities	4
Virginia Electric and Power Company | Level 3 | Natural Gas | Physical and Financial Forwards and Futures:
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	78	[1]
Virginia Electric and Power Company | Level 3 | FTRs | Physical and Financial Forwards and Futures:
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets	4
Fair Value of Derivative Liabilities	$4
Virginia Electric and Power Company | Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | Natural Gas | Physical and Financial Forwards and Futures: | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	-2	[2]
Credit spread (percentage)	1.00%	[3]
Virginia Electric and Power Company | Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | Natural Gas | Physical and Financial Forwards and Futures: | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	3	[2]
Credit spread (percentage)	5.00%	[3]
Virginia Electric and Power Company | Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | Natural Gas | Physical and Financial Forwards and Futures: | Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	-1	[2],[4]
Credit spread (percentage)	2.00%	[3],[4]
Virginia Electric and Power Company | Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | FTRs | Physical and Financial Forwards and Futures: | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	-5	[2]
Virginia Electric and Power Company | Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | FTRs | Physical and Financial Forwards and Futures: | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	7	[2]
Virginia Electric and Power Company | Level 3 | Fair Value, Option, Quantitative Disclosures, Assets | FTRs | Physical and Financial Forwards and Futures: | Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	1	[2],[4]
Virginia Electric and Power Company | Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | Natural Gas | Physical and Financial Forwards and Futures: | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	-2	[2]
Virginia Electric and Power Company | Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | Natural Gas | Physical and Financial Forwards and Futures: | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	5	[2]
Virginia Electric and Power Company | Level 3 | Fair Value, Option, Quantitative Disclosures, Liabilities | FTRs | Physical and Financial Forwards and Futures: | Wieghted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Market Price (per unit)	1	[2],[4]
[1]	Includes basis.
[2]	Represents market prices beyond defined terms for Levels 1 and 2.
[3]	Represents credit spreads unrepresented in published markets.
[4]	Averages weighted by volume.
[5]	Represents volatilities unrepresented in published markets.

Fair_Value_Measurements_Assets

Fair Value Measurements (Assets and Liabilities that are Measured at Fair Value on a Recurring Basis) (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$679		$719
Derivative Liabilities	765		794
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	94
Derivative Liabilities	18
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	4,959	[1]	4,938	[1]
Total liabilities	765		794
Fair Value, Measurements, Recurring | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	661		695
Derivative Liabilities	458		592
Fair Value, Measurements, Recurring | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	18		24
Derivative Liabilities	307		202
Fair Value, Measurements, Recurring | Equity securities: | Large cap | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	2,647	[1]	2,669	[1]
Fair Value, Measurements, Recurring | Equity securities: | Large cap | Non-U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	12	[1]	12	[1]
Fair Value, Measurements, Recurring | Equity securities: | Other | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	7	[1]	6	[1]
Fair Value, Measurements, Recurring | Fixed income: | Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	462	[1]	441	[1]
Fair Value, Measurements, Recurring | Fixed income: | U.S. Treasury securities and agency debentures
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	594	[1]	609	[1]
Fair Value, Measurements, Recurring | Fixed income: | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	423	[1]	395	[1]
Fair Value, Measurements, Recurring | Fixed income: | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	130	[1]	74	[1]
Fair Value, Measurements, Recurring | Cash equivalents and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	5	[1]	13	[1]
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	3,077	[1]	3,112	[1]
Total liabilities	3		3
Fair Value, Measurements, Recurring | Level 1 | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	3		3
Derivative Liabilities	3		3
Fair Value, Measurements, Recurring | Level 1 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
Fair Value, Measurements, Recurring | Level 1 | Equity securities: | Large cap | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	2,647	[1]	2,669	[1]
Fair Value, Measurements, Recurring | Level 1 | Equity securities: | Large cap | Non-U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	12	[1]	12	[1]
Fair Value, Measurements, Recurring | Level 1 | Equity securities: | Other | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	7	[1]	6	[1]
Fair Value, Measurements, Recurring | Level 1 | Fixed income: | Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 1 | Fixed income: | U.S. Treasury securities and agency debentures
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	407	[1]	419	[1]
Fair Value, Measurements, Recurring | Level 1 | Fixed income: | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 1 | Fixed income: | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 1 | Cash equivalents and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1	[1]	3	[1]
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	1,788	[1]	1,701	[1]
Total liabilities	744		773
Fair Value, Measurements, Recurring | Level 2 | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	564		567
Derivative Liabilities	437		571
Fair Value, Measurements, Recurring | Level 2 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	18		24
Derivative Liabilities	307		202
Fair Value, Measurements, Recurring | Level 2 | Equity securities: | Large cap | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 2 | Equity securities: | Large cap | Non-U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 2 | Equity securities: | Other | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 2 | Fixed income: | Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	462	[1]	441	[1]
Fair Value, Measurements, Recurring | Level 2 | Fixed income: | U.S. Treasury securities and agency debentures
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	187	[1]	190	[1]
Fair Value, Measurements, Recurring | Level 2 | Fixed income: | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	423	[1]	395	[1]
Fair Value, Measurements, Recurring | Level 2 | Fixed income: | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	130	[1]	74	[1]
Fair Value, Measurements, Recurring | Level 2 | Cash equivalents and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	4	[1]	10	[1]
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	94	[1]	125	[1]
Total liabilities	18		18
Fair Value, Measurements, Recurring | Level 3 | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	94		125
Derivative Liabilities	18		18
Fair Value, Measurements, Recurring | Level 3 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
Fair Value, Measurements, Recurring | Level 3 | Equity securities: | Large cap | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 3 | Equity securities: | Large cap | Non-U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 3 | Equity securities: | Other | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 3 | Fixed income: | Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 3 | Fixed income: | U.S. Treasury securities and agency debentures
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 3 | Fixed income: | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 3 | Fixed income: | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Level 3 | Cash equivalents and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Virginia Electric and Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	106		113
Derivative Liabilities	139		87
Virginia Electric and Power Company | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	82
Derivative Liabilities	4
Virginia Electric and Power Company | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	1,977	[1]	1,952	[1]
Total liabilities	139		87
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	106		113
Derivative Liabilities	11		15
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities	128		72
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Equity securities: | Large cap | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,166	[1]	1,157	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Fixed income: | Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	258	[1]	250	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Fixed income: | U.S. Treasury securities and agency debentures
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	192	[1]	198	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Fixed income: | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	224	[1]	211	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Fixed income: | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	31	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Cash equivalents and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			23	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	1,295	[1]	1,294	[1]
Total liabilities	0		0
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 1 | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 1 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities	0		0
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 1 | Equity securities: | Large cap | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,166	[1]	1,157	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 1 | Fixed income: | Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 1 | Fixed income: | U.S. Treasury securities and agency debentures
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	129	[1]	137	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 1 | Fixed income: | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 1 | Fixed income: | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 1 | Cash equivalents and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	600	[1]	552	[1]
Total liabilities	135		83
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 2 | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	24		7
Derivative Liabilities	7		11
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 2 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities	128		72
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 2 | Equity securities: | Large cap | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 2 | Fixed income: | Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	258	[1]	250	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 2 | Fixed income: | U.S. Treasury securities and agency debentures
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	63	[1]	61	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 2 | Fixed income: | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	224	[1]	211	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 2 | Fixed income: | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	31	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 2 | Cash equivalents and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			23	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	82	[1]	106	[1]
Total liabilities	4		4
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 3 | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	82		106
Derivative Liabilities	4		4
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 3 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities	0		0
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 3 | Equity securities: | Large cap | U.S.:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 3 | Fixed income: | Corporate debt instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 3 | Fixed income: | U.S. Treasury securities and agency debentures
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 3 | Fixed income: | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]	0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 3 | Fixed income: | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	[1]
Virginia Electric and Power Company | Fair Value, Measurements, Recurring | Level 3 | Cash equivalents and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			0	[1]
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	3		2
Total liabilities	16
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	3		2
Derivative Liabilities	3		9
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities	13		9
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0		0
Total liabilities	0
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Level 1 | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Level 1 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities	0		0
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	3		0
Total liabilities	16
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Level 2 | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	3		0
Derivative Liabilities	3		9
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Level 2 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities	13		9
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0		2
Total liabilities	0
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Level 3 | Commodity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		2
Derivative Liabilities	0		0
Dominion Gas Holdings, LLC | Fair Value, Measurements, Recurring | Level 3 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities	$0		$0
[1]	Includes investments held in the nuclear decommissioning and rabbi trusts.

Fair_Value_Measurements_Net_Ch

Fair Value Measurements (Net Change in the Assets and Liabilities Measured at Fair Value on a Recurring Basis and Included in the Level 3 Fair Value Category) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Total realized and unrealized gains (losses):
Included in earnings	$15		$110
The amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	0		1
Level 3 | Commodity Transactions | Fair Value, Measurements, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	107		-16
Total realized and unrealized gains (losses):
Included in earnings	15		110
Included in other comprehensive income (loss)	-11		4
Included in regulatory assets/liabilities	-24		17
Settlements	-14		-108
Transfers out of Level 3(1)	3	[1]	1	[1]
Ending balance	76		8
The amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	0		1
Level 3 | NGLs | Fair Value, Measurements, Recurring
Total realized and unrealized gains (losses):
Transfers out of Level 3(1)	9	[1]
Level 3 | Virginia Electric and Power Company | Commodity Transactions | Fair Value, Measurements, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	102		-7
Total realized and unrealized gains (losses):
Included in earnings	14		120
Included in regulatory assets/liabilities	-24		17
Settlements	-14		-120
Ending balance	78		10
Level 3 | Dominion Gas Holdings, LLC | Commodity Transactions | Fair Value, Measurements, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	2		-6
Total realized and unrealized gains (losses):
Included in earnings	1		-5
Included in other comprehensive income (loss)	-11		4
Settlements	-1		5
Transfers out of Level 3(1)	9	[1]	0	[1]
Ending balance	0		-2
Level 3 | Dominion Gas Holdings, LLC | NGLs | Fair Value, Measurements, Recurring
Total realized and unrealized gains (losses):
Transfers out of Level 3(1)	$9	[1]
[1]	In March 2015, Dominion changed the classification of NGL derivatives from Level 3 to Level 2 due to an increase in liquidity in financial forward markets. At March 31, 2015, $9 million of the transfers out of Level 3 relate to NGLs.

Fair_Value_Measurements_Gains_

Fair Value Measurements (Gains and Losses Included in Earnings in the Level 3 Fair Value Category) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) included in earnings	$15	$110
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	0	1
Operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) included in earnings	2	-10
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	0	1
Electric fuel and other energy-related purchases
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) included in earnings	13	120
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets/liabilities still held at the reporting date	$0	$0

Fair_Value_Measurements_Financ

Fair Value Measurements (Financial Instruments' Carrying Amounts and Fair Values) (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Junior subordinated notes	$1,373		$1,374	[1]
Valuation of certain fair value hedges	15		19
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Long-term Debt	19,718	[2],[3]	19,723	[2],[3]
Junior subordinated notes	1,373	[3]	1,374	[3]
Remarketable subordinated notes	2,084	[3]	2,083	[3]
Estimate of Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Long-term Debt	22,197	[2],[3],[4]	21,881	[2],[3],[4]
Junior subordinated notes	1,405	[3],[4]	1,396	[3],[4]
Remarketable subordinated notes	2,206	[3],[4]	2,362	[3],[4]
Virginia Electric and Power Company | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Long-term Debt	8,936	[3]	8,937	[3]
Virginia Electric and Power Company | Estimate of Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Long-term Debt	10,441	[3],[4]	10,293	[3],[4]
Dominion Gas Holdings, LLC | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Long-term Debt	2,594	[3]	2,594	[3]
Dominion Gas Holdings, LLC | Estimate of Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Long-term Debt	$2,720	[3],[4]	$2,672	[3],[4]
[1]	Dominion’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[2]	At March 31, 2015 and December 31, 2014, includes the valuation of certain fair value hedges associated with fixed rate debt of approximately $15 million and $19 million, respectively.
[3]	Carrying amount includes amounts which represent the unamortized discount and/or premium.
[4]	Fair value is estimated using market prices, where available, and interest rates currently available for issuance of debt with similar terms and remaining maturities. All fair value measurements are classified as Level 2. The carrying amount of debt issues with short-term maturities and variable rates refinanced at current market rates is a reasonable estimate of their fair value.

Derivatives_and_Hedge_Accounti2

Derivatives and Hedge Accounting Activities (Schedule of Offsetting Assets) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	$667	$704
Total derivatives, not subject to a master netting or similar arrangement	12	15
Derivative Asset	679	719
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Financial Instruments	389	348
Cash Collateral Received	0	34
Net Amounts	278	322
Interest rate | Over-the-counter
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	18	24
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Financial Instruments	18	16
Cash Collateral Received	0	0
Net Amounts	0	8
Commodity | Over-the-counter
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	323	382
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Financial Instruments	45	34
Cash Collateral Received	0	34
Net Amounts	278	314
Commodity | Exchange
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	326	298
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Financial Instruments	326	298
Cash Collateral Received	0	0
Net Amounts	0	0
Virginia Electric and Power Company
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	82	106
Total derivatives, not subject to a master netting or similar arrangement	24	7
Derivative Asset	106	113
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Financial Instruments	4	4
Cash Collateral Received	0	0
Net Amounts	78	102
Virginia Electric and Power Company | Commodity | Over-the-counter
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	82	106
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Financial Instruments	4	4
Cash Collateral Received	0	0
Net Amounts	78	102
Dominion Gas Holdings, LLC
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	3	2
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Financial Instruments	3	0
Cash Collateral Received	0	0
Net Amounts	0	2
Dominion Gas Holdings, LLC | Commodity | Over-the-counter
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	3	2
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Financial Instruments	3	0
Cash Collateral Received	0	0
Net Amounts	$0	$2

Derivatives_and_Hedge_Accounti3

Derivatives and Hedge Accounting Activities (Schedule of Offsetting Liabilities) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	$754	$782
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Total derivatives, not subject to a master netting or similar arrangement	11	12
Derivative Liabilities	765	794
Derivative, Collateral, Right to Reclaim Securities	389	348
Derivative, Collateral, Right to Reclaim Cash	38	196
Net Amounts	327	238
Interest rate | Over-the-counter
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	307	202
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Derivative, Collateral, Right to Reclaim Securities	18	16
Derivative, Collateral, Right to Reclaim Cash	0	0
Net Amounts	289	186
Commodity | Over-the-counter
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	83	87
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Derivative, Collateral, Right to Reclaim Securities	45	34
Derivative, Collateral, Right to Reclaim Cash	0	1
Net Amounts	38	52
Commodity | Exchange
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	364	493
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Derivative, Collateral, Right to Reclaim Securities	326	298
Derivative, Collateral, Right to Reclaim Cash	38	195
Net Amounts	0	0
Virginia Electric and Power Company
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	133	80
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Total derivatives, not subject to a master netting or similar arrangement	6	7
Derivative Liabilities	139	87
Derivative, Collateral, Right to Reclaim Securities	4	4
Derivative, Collateral, Right to Reclaim Cash	0	0
Net Amounts	129	76
Virginia Electric and Power Company | Interest rate | Over-the-counter
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	128	72
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Derivative, Collateral, Right to Reclaim Securities	0	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Net Amounts	128	72
Virginia Electric and Power Company | Commodity | Over-the-counter
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	5	8
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Derivative, Collateral, Right to Reclaim Securities	4	4
Derivative, Collateral, Right to Reclaim Cash	0	0
Net Amounts	1	4
Dominion Gas Holdings, LLC
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	16	9
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Derivative, Collateral, Right to Reclaim Securities	3	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Net Amounts	13	9
Dominion Gas Holdings, LLC | Interest rate | Over-the-counter
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	13	9
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Derivative, Collateral, Right to Reclaim Securities	0	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Net Amounts	13	9
Dominion Gas Holdings, LLC | Commodity | Over-the-counter
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	3	0
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Derivative, Collateral, Right to Reclaim Securities	3	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Net Amounts	$0	$0

Derivatives_and_Hedge_Accounti4

Derivatives and Hedge Accounting Activities (Volume of Derivative Activity) (Details) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Current Derivative Contract
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate	$2,550
Current Derivative Contract | Natural Gas | Fixed Price
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	55,000,000,000	[1]
Current Derivative Contract | Natural Gas | Basis
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	224,000,000,000
Current Derivative Contract | Electricity | Fixed Price
Derivative Instruments, Gain (Loss) [Line Items]
Volume of electricity (MWh)	13,610,507
Current Derivative Contract | Electricity | Financial Transmission Rights
Derivative Instruments, Gain (Loss) [Line Items]
Volume of electricity (MWh)	14,994,541
Current Derivative Contract | Capacity
Derivative Instruments, Gain (Loss) [Line Items]
Capacity (MW)	15,250
Current Derivative Contract | Liquids
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	77,280,000	[2]
Noncurrent Derivative Contract
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate	4,000
Noncurrent Derivative Contract | Natural Gas | Fixed Price
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	10,000,000,000	[1]
Noncurrent Derivative Contract | Natural Gas | Basis
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	558,000,000,000
Noncurrent Derivative Contract | Electricity | Fixed Price
Derivative Instruments, Gain (Loss) [Line Items]
Volume of electricity (MWh)	7,505,325
Noncurrent Derivative Contract | Electricity | Financial Transmission Rights
Derivative Instruments, Gain (Loss) [Line Items]
Volume of electricity (MWh)	0
Noncurrent Derivative Contract | Capacity
Derivative Instruments, Gain (Loss) [Line Items]
Capacity (MW)	3,050
Noncurrent Derivative Contract | Liquids
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	2,016,000	[2]
Virginia Electric and Power Company | Current Derivative Contract
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate	1,000
Virginia Electric and Power Company | Current Derivative Contract | Natural Gas | Fixed Price
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	12,000,000,000	[1]
Virginia Electric and Power Company | Current Derivative Contract | Natural Gas | Basis
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	84,000,000,000
Virginia Electric and Power Company | Current Derivative Contract | Electricity | Financial Transmission Rights
Derivative Instruments, Gain (Loss) [Line Items]
Volume of electricity (MWh)	13,486,569
Virginia Electric and Power Company | Current Derivative Contract | Capacity
Derivative Instruments, Gain (Loss) [Line Items]
Capacity (MW)	15,250
Virginia Electric and Power Company | Noncurrent Derivative Contract
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate	750
Virginia Electric and Power Company | Noncurrent Derivative Contract | Natural Gas | Fixed Price
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	0	[1]
Virginia Electric and Power Company | Noncurrent Derivative Contract | Natural Gas | Basis
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	493,000,000,000
Virginia Electric and Power Company | Noncurrent Derivative Contract | Electricity | Financial Transmission Rights
Derivative Instruments, Gain (Loss) [Line Items]
Volume of electricity (MWh)	0
Virginia Electric and Power Company | Noncurrent Derivative Contract | Capacity
Derivative Instruments, Gain (Loss) [Line Items]
Capacity (MW)	3,050
Dominion Gas Holdings, LLC | Current Derivative Contract
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate	0
Dominion Gas Holdings, LLC | Current Derivative Contract | Natural Gas | Fixed Price
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	7,000,000,000
Dominion Gas Holdings, LLC | Current Derivative Contract | Natural Gas | Basis
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	8,000,000,000
Dominion Gas Holdings, LLC | Current Derivative Contract | Liquids
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	72,912,000
Dominion Gas Holdings, LLC | Noncurrent Derivative Contract
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate	$250
Dominion Gas Holdings, LLC | Noncurrent Derivative Contract | Natural Gas | Fixed Price
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	0
Dominion Gas Holdings, LLC | Noncurrent Derivative Contract | Natural Gas | Basis
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	0
Dominion Gas Holdings, LLC | Noncurrent Derivative Contract | Liquids
Derivative Instruments, Gain (Loss) [Line Items]
Volume of natural gas (cf)/ liquids (gallons)	0
[1]	Includes options.
[2]	Includes NGLs and oil.

Derivatives_and_Hedge_Accounti5

Derivatives and Hedge Accounting Activities (Selected Information Related to Gains (Losses) on Cash Flow Hedges Included in AOCI) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
AOCI After-Tax	($177)
Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax	20
Commodity | Gas Energy Contract
Derivative Instruments, Gain (Loss) [Line Items]
AOCI After-Tax	-5
Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax	-5
Maximum Term	25 months
Commodity | Electricity Energy Contract
Derivative Instruments, Gain (Loss) [Line Items]
AOCI After-Tax	89
Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax	32
Maximum Term	21 months
Commodity | Other Energy Contract
Derivative Instruments, Gain (Loss) [Line Items]
AOCI After-Tax	0
Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax	-1
Maximum Term	14 months
Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
AOCI After-Tax	-261
Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax	-6
Maximum Term	393 months
Dominion Gas Holdings, LLC
Derivative Instruments, Gain (Loss) [Line Items]
AOCI After-Tax	-24
Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax	0
Dominion Gas Holdings, LLC | Commodity | NGLs
Derivative Instruments, Gain (Loss) [Line Items]
AOCI After-Tax	-1
Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax	0
Maximum Term	12 months
Dominion Gas Holdings, LLC | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
AOCI After-Tax	-23
Amounts Expected to be Reclassified to Earnings during the next 12 Months After-Tax	$0
Maximum Term	357 months

Derivatives_and_Hedge_Accounti6

Derivatives and Hedge Accounting Activities (Fair Value of Derivatives) (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	$679		$719
Total Fair Value, Liabilities	765		794
Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	420	[1]	536	[1]
Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	407		523
Current Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	13		13
Noncurrent Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	259	[2]	183	[2]
Noncurrent Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	254		172
Noncurrent Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	5		11
Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	600		591
Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	371		491
Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	229		100
Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	165	[3]	203	[3]
Noncurrent Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	87		101
Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	78		102
Fair Value – Derivatives under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	456		376
Total Fair Value, Liabilities	608		481
Fair Value – Derivatives under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	311	[1]	294	[1]
Fair Value – Derivatives under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	298		281
Fair Value – Derivatives under Hedge Accounting | Current Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	13		13
Fair Value – Derivatives under Hedge Accounting | Noncurrent Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	145	[2]	82	[2]
Fair Value – Derivatives under Hedge Accounting | Noncurrent Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	140		71
Fair Value – Derivatives under Hedge Accounting | Noncurrent Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	5		11
Fair Value – Derivatives under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	482		324
Fair Value – Derivatives under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	253		224
Fair Value – Derivatives under Hedge Accounting | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	229		100
Fair Value – Derivatives under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	126	[3]	157	[3]
Fair Value – Derivatives under Hedge Accounting | Noncurrent Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	48		55
Fair Value – Derivatives under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	78		102
Fair Value – Derivatives not under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	223		343
Total Fair Value, Liabilities	157		313
Fair Value – Derivatives not under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	109	[1]	242	[1]
Fair Value – Derivatives not under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	109		242
Fair Value – Derivatives not under Hedge Accounting | Current Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	0		0
Fair Value – Derivatives not under Hedge Accounting | Noncurrent Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	114	[2]	101	[2]
Fair Value – Derivatives not under Hedge Accounting | Noncurrent Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	114		101
Fair Value – Derivatives not under Hedge Accounting | Noncurrent Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	0		0
Fair Value – Derivatives not under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	118		267
Fair Value – Derivatives not under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	118		267
Fair Value – Derivatives not under Hedge Accounting | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0		0
Fair Value – Derivatives not under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	39	[3]	46	[3]
Fair Value – Derivatives not under Hedge Accounting | Noncurrent Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	39		46
Fair Value – Derivatives not under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0		0
Virginia Electric and Power Company
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	106		113
Total Fair Value, Liabilities	139		87
Virginia Electric and Power Company | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	28	[4]	51	[4]
Virginia Electric and Power Company | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	28		51
Virginia Electric and Power Company | Noncurrent Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	78	[5]	62	[5]
Virginia Electric and Power Company | Noncurrent Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	78		62
Virginia Electric and Power Company | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	107	[6]	60	[6]
Virginia Electric and Power Company | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	11		15
Virginia Electric and Power Company | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	96		45
Virginia Electric and Power Company | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	32	[7]	27	[7]
Virginia Electric and Power Company | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	32		27
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	0		0
Total Fair Value, Liabilities	129		75
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	0	[4]	0	[4]
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	0		0
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting | Noncurrent Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	0	[5]	0	[5]
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting | Noncurrent Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	0		0
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	97	[6]	48	[6]
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	1		3
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	96		45
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	32	[7]	27	[7]
Virginia Electric and Power Company | Fair Value – Derivatives under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	32		27
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	106		113
Total Fair Value, Liabilities	10		12
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	28	[4]	51	[4]
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	28		51
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting | Noncurrent Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	78	[5]	62	[5]
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting | Noncurrent Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	78		62
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	10	[6]	12	[6]
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	10		12
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0		0
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0	[7]	0	[7]
Virginia Electric and Power Company | Fair Value – Derivatives not under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0		0
Dominion Gas Holdings, LLC
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	3		2
Total Fair Value, Liabilities	16		9
Dominion Gas Holdings, LLC | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	3	[8]	2	[8]
Dominion Gas Holdings, LLC | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	3		2
Dominion Gas Holdings, LLC | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	3	[9]	9	[9]
Dominion Gas Holdings, LLC | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	3		9
Dominion Gas Holdings, LLC | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	13	[10]
Dominion Gas Holdings, LLC | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	13
Dominion Gas Holdings, LLC | Fair Value – Derivatives under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	2		2
Total Fair Value, Liabilities	16		9
Dominion Gas Holdings, LLC | Fair Value – Derivatives under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	2	[8]	2	[8]
Dominion Gas Holdings, LLC | Fair Value – Derivatives under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	2		2
Dominion Gas Holdings, LLC | Fair Value – Derivatives under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	3	[9]	9	[9]
Dominion Gas Holdings, LLC | Fair Value – Derivatives under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	3		9
Dominion Gas Holdings, LLC | Fair Value – Derivatives under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	13	[10]
Dominion Gas Holdings, LLC | Fair Value – Derivatives under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	13
Dominion Gas Holdings, LLC | Fair Value – Derivatives not under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	1		0
Total Fair Value, Liabilities	0		0
Dominion Gas Holdings, LLC | Fair Value – Derivatives not under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	1	[8]	0	[8]
Dominion Gas Holdings, LLC | Fair Value – Derivatives not under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	1		0
Dominion Gas Holdings, LLC | Fair Value – Derivatives not under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0	[9]	0	[9]
Dominion Gas Holdings, LLC | Fair Value – Derivatives not under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0		0
Dominion Gas Holdings, LLC | Fair Value – Derivatives not under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0	[10]
Dominion Gas Holdings, LLC | Fair Value – Derivatives not under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	$0
[1]	Current derivative assets are presented in other current assets in Dominion's Consolidated Balance Sheets.
[2]	Noncurrent derivative assets are presented in other deferred charges and other assets in Dominion’s Consolidated Balance Sheets.
[3]	Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Dominion’s Consolidated Balance Sheets.
[4]	Current derivative assets are presented in other current assets in Virginia Power's Consolidated Balance Sheets.
[5]	Noncurrent derivative assets are presented in other deferred charges and other assets in Virginia Power's Consolidated Balance Sheets.
[6]	Current derivative liabilities are presented in other current liabilities in Virginia Power's Consolidated Balance Sheets.
[7]	Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Virginia Power’s Consolidated Balance Sheets.
[8]	Current derivative assets are presented in other current assets in Dominion Gas' Consolidated Balance Sheets.
[9]	Current derivative liabilities are presented in other current liabilities in Dominion Gas' Consolidated Balance Sheets.
[10]	Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Dominion Gas’ Consolidated Balance Sheets.

Derivatives_and_Hedge_Accounti7

Derivatives and Hedge Accounting Activities (Gains and Losses on Derivatives in Cash Flow Hedging Relationships) (Details) (Cash Flow Hedges, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	($99)	[1]	($230)	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	-98		-260
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	-46	[2]	-21	[2]
Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	-41	[1]	-183	[1]
Amount of Gain (Loss) Reclassified from AOCI to Income	-96		-257
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	3	[2]	2	[2]
Commodity | Operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	-92		-269
Commodity | Purchased gas
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	-5		-1
Commodity | Electric fuel and other energy-related purchases
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	1		13
Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	-58	[1],[3]	-47	[1],[3]
Amount of Gain (Loss) Reclassified from AOCI to Income	-2	[3]	-3	[3]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	-49	[2],[3]	-23	[2],[3]
Virginia Electric and Power Company
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	-6	[4]	3	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	-1		5
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	-46	[5]	-21	[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]	6	[4]
Amount of Gain (Loss) Reclassified from AOCI to Income	-1		5
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	3	[5]	2	[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		5
Virginia Electric and Power Company | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	-6	[4],[6]	-3	[4],[6]
Amount of Gain (Loss) Reclassified from AOCI to Income	0	[6]	0	[6]
Increase (Decrease) in Derivatives Subject to Regulatory Treatment	-49	[5],[6]	-23	[5],[6]
Dominion Gas Holdings, LLC
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	-6	[7]	-13	[7]
Amount of Gain (Loss) Reclassified from AOCI to Income	0		-8
Dominion Gas Holdings, LLC | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	-2	[7]	1	[7]
Amount of Gain (Loss) Reclassified from AOCI to Income	0		-8
Dominion Gas Holdings, LLC | Commodity | Operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income	0		-6
Dominion Gas Holdings, LLC | Commodity | Purchased gas
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income			-2
Dominion Gas Holdings, LLC | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	-4	[7],[8]	-14	[7],[8]
Amount of Gain (Loss) Reclassified from AOCI to Income	$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.

Derivatives_and_Hedge_Accounti8

Derivatives and Hedge Accounting Activities (Schedule of Derivatives not Designated as Hedging Instruments) (Details) (Derivatives not designated as hedging instruments, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$7	[1]	($221)	[1]
Commodity | Operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	3	[1]	-361	[1]
Commodity | Purchased gas
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	-2	[1]	7	[1]
Commodity | Electric fuel and other energy-related purchases
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	6	[1]	133	[1]
Virginia Electric and Power Company
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	7	[2]	119	[2]
Virginia Electric and Power Company | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$7	[2],[3]	$119	[2],[3]
[1]	Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Dominion’s Consolidated Statements of Income.
[2]	Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in Virginia Power’s Consolidated Statements of Income.
[3]	Amounts recorded in Virginia Power's Consolidated Statements of Income are classified in electric fuel and other energy-related purchases.

Investments_Narrative_Details

Investments (Narrative) (Details) (USD $)	1 Months Ended		3 Months Ended
In Millions, unless otherwise specified	Jan. 31, 2014	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Blue Racer
Gain (Loss) on Investments [Line Items]
Increase in equity method investment	$155
Write off of goodwill	6
Blue Racer | Pipelines
Gain (Loss) on Investments [Line Items]
Consideration for Northern System		84		84
Cash proceeds from sale of assets		84
After tax gain on sale of assets		34
Dominion Gas Holdings, LLC
Gain (Loss) on Investments [Line Items]
Equity in earnings on investments			8	8
Distributions received from investment			12	5
Carrying amount of investment that exceeded share of underlying equity					8
Dominion Gas Holdings, LLC | Blue Racer | Pipelines
Gain (Loss) on Investments [Line Items]
Write off of goodwill		3
Cash proceeds from sale of assets		17
Extinguishment of affiliated current borrowings		67
Gain on sale of assets		59
After tax gain on sale of assets		35
Categories of Investments, Marketable Securities, Trading Securities
Gain (Loss) on Investments [Line Items]
Assets Held-in-trust			116		110
Cost method investments
Gain (Loss) on Investments [Line Items]
Assets Held-in-trust			$6		$6

Investments_Marketable_Equity_

Investments (Marketable Equity and Debt Securities and Cash Equivalents (Classified as Available-for-sale) and Cost Method Investments in Decommissioning Trust Funds) (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Investment Holdings [Line Items]
Amortized Cost, Total	$2,844		$2,794
Total Unrealized Gains	1,402	[1]	1,408	[1]
Total Unrealized Losses	-2	[1],[2]	-6	[1],[2]
Nuclear decommissioning trust funds	4,244		4,196	[3]
Net assets related to pending sales and purchases of securities	3		3
Fair Value of securities in an unrealized loss position	239		379
Cost method investments
Investment Holdings [Line Items]
Amortized Cost, Other Investments	77		86
Total Unrealized Gains	0	[1]	0	[1]
Total Unrealized Losses	0	[1]	0	[1]
Nuclear decommissioning trust funds	77		86
Cash Equivalents and Other Investment
Investment Holdings [Line Items]
Amortized Cost, Other Investments	8	[4]	16	[4]
Total Unrealized Gains	0	[1],[4]	0	[1],[4]
Total Unrealized Losses	0	[1],[4]	0	[1],[4]
Nuclear decommissioning trust funds	8	[4]	16	[4]
Equity Securities | U.S. large cap | U.S.:
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	1,265		1,273
Total Unrealized Gains	1,338	[1]	1,353	[1]
Total Unrealized Losses	0	[1]	0	[1]
Nuclear decommissioning trust funds	2,603		2,626
Corporate bonds
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	440		424
Total Unrealized Gains	23	[1]	19	[1]
Total Unrealized Losses	-1	[1]	-2	[1]
Nuclear decommissioning trust funds	462		441
U.S. Treasury securities and agency debentures
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	576		597
Total Unrealized Gains	17	[1]	13	[1]
Total Unrealized Losses	-1	[1]	-4	[1]
Nuclear decommissioning trust funds	592		606
State and municipal
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	356		332
Total Unrealized Gains	24	[1]	23	[1]
Total Unrealized Losses	0	[1]	0	[1]
Nuclear decommissioning trust funds	380		355
Other
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	122		66
Total Unrealized Gains	0	[1]	0	[1]
Total Unrealized Losses	0	[1]	0	[1]
Nuclear decommissioning trust funds	122		66
Virginia Electric and Power Company
Investment Holdings [Line Items]
Amortized Cost, Total	1,331		1,314
Total Unrealized Gains	620	[1]	619	[1]
Total Unrealized Losses	-1	[1],[5]	-3	[1],[5]
Nuclear decommissioning trust funds	1,950		1,930	[6]
Net assets related to pending sales and purchases of securities	4		6
Fair Value of securities in an unrealized loss position	120		170
Virginia Electric and Power Company | Cost method investments
Investment Holdings [Line Items]
Amortized Cost, Other Investments	77		86
Total Unrealized Gains	0	[1]	0	[1]
Total Unrealized Losses	0	[1]	0	[1]
Nuclear decommissioning trust funds	77		86
Virginia Electric and Power Company | Cash Equivalents and Other Investment
Investment Holdings [Line Items]
Amortized Cost, Other Investments	4	[7]	6	[7]
Total Unrealized Gains	0	[1],[7]	0	[1],[7]
Total Unrealized Losses	0	[1],[7]	0	[1],[7]
Nuclear decommissioning trust funds	4	[7]	6	[7]
Virginia Electric and Power Company | Equity Securities | U.S. large cap | U.S.:
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	573		563
Total Unrealized Gains	592	[1]	594	[1]
Total Unrealized Losses	0	[1]	0	[1]
Nuclear decommissioning trust funds	1,165		1,157
Virginia Electric and Power Company | Corporate bonds
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	247		242
Total Unrealized Gains	11	[1]	9	[1]
Total Unrealized Losses	0	[1]	-1	[1]
Nuclear decommissioning trust funds	258		250
Virginia Electric and Power Company | U.S. Treasury securities and agency debentures
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	190		197
Total Unrealized Gains	3	[1]	3	[1]
Total Unrealized Losses	-1	[1]	-2	[1]
Nuclear decommissioning trust funds	192		198
Virginia Electric and Power Company | State and municipal
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	209		197
Total Unrealized Gains	14	[1]	13	[1]
Total Unrealized Losses	0	[1]	0	[1]
Nuclear decommissioning trust funds	223		210
Virginia Electric and Power Company | Other
Investment Holdings [Line Items]
Amortized Cost, Marketable Securities	31		23
Total Unrealized Gains	0	[1]	0	[1]
Total Unrealized Losses	0	[1]	0	[1]
Nuclear decommissioning trust funds	$31		$23
[1]	Included in AOCI and the nuclear decommissioning trust regulatory liability.
[2]	The fair value of securities in an unrealized loss position was $239 million and $379 million at March 31, 2015 and December 31, 2014, respectively.
[3]	Dominion’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[4]	Includes pending sales of securities of $3 million at both March 31, 2015 and December 31, 2014.
[5]	The fair value of securities in an unrealized loss position was $120 million and $170 million at March 31, 2015 and December 31, 2014, respectively.
[6]	Virginia Power’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[7]	Includes pending sales of securities of $4 million and $6 million at March 31, 2015 and December 31, 2014, respectively.

Investments_Fair_Value_of_our_

Investments (Fair Value of our Marketable Debt Securities by Contractual Maturity) (Details) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]
Due in one year or less	$233
Due after one year through five years	383
Due after five years through ten years	435
Due after ten years	505
Total	1,556
Virginia Electric and Power Company
Schedule of Held-to-maturity Securities [Line Items]
Due in one year or less	51
Due after one year through five years	168
Due after five years through ten years	245
Due after ten years	240
Total	$704

Investments_Selected_Informati

Investments (Selected Information Regarding Marketable Equity and Debt Securities) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Available-for-sale securities:
Proceeds from sales	$337		$442
Realized gains	56	[1]	38	[1]
Realized losses	17	[1]	6	[1]
Virginia Electric and Power Company
Available-for-sale securities:
Proceeds from sales	133		204
Realized gains	18	[1]	19	[1]
Realized losses	$11	[1]	$3	[1]
[1]	Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.

Investments_Investments_under_

Investments (Investments under Equity Method of Accounting) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Schedule of Equity Method Investments [Line Items]
Investment Balance	$1,085	$1,081	[1]
Dominion Gas Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Investment Balance	103	107
Dominion Gas Holdings, LLC | Iroquois
Schedule of Equity Method Investments [Line Items]
Ownership%	24.72%
Investment Balance	$103	$107
[1]	Dominion’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.

Regulatory_Assets_and_Liabilit2

Regulatory Assets and Liabilities (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Regulatory Assets and Liablities [Line Items]
Deferred cost of fuel used in electric generation	$122	[1]	$79	[1]
Deferred rate adjustment clause costs	108	[2]	124	[2]
Deferred nuclear refueling outage costs	57	[3]	44	[3]
Unrecovered gas costs	16	[4]	36	[4]
Other	59		64
Regulatory assets current	362	[5]	347	[5]
Unrecognized pension and other postretirement benefit costs	1,034	[6]	1,050	[6]
Deferred rate adjustment clause costs	216	[2]	250	[2]
Derivatives	150	[7]	101	[7]
Income taxes recoverable through future rates	136	[8]	133	[8]
Other	129		108
Regulatory assets-non-current	1,665		1,642	[9]
Total regulatory assets	2,027		1,989
PIPP	63	[10]	71	[10]
Other	43		99
Regulatory liabilities current	106	[11]	170	[11]
Provision for future cost of removal and AROs	1,100	[12]	1,072	[12]
Nuclear decommissioning trust	822	[13]	815	[13]
Other	197		104
Regulatory liabilities-non-current	2,119		1,991	[9]
Total regulatory liabilities	2,225		2,161
Amortization period for deferred costs	18 months
Virginia Electric and Power Company
Regulatory Assets and Liablities [Line Items]
Deferred cost of fuel used in electric generation	122	[1]	79	[1]
Deferred rate adjustment clause costs	106	[2]	117	[2]
Deferred nuclear refueling outage costs	57	[3]	44	[3]
Other	54		58
Regulatory assets current	339		298	[14]
Deferred rate adjustment clause costs	141	[2]	179	[2]
Derivatives	150	[7]	101	[7]
Income taxes recoverable through future rates	103	[8]	100	[8]
Other	70		59
Regulatory assets-non-current	464		439	[14]
Total regulatory assets	803		737
Other	23		90
Regulatory liabilities current	23	[11]	90	[11]
Provision for future cost of removal	864	[12]	852	[12]
Nuclear decommissioning trust	822	[13]	815	[13]
Other	83		16
Regulatory liabilities-non-current	1,769		1,683	[14]
Total regulatory liabilities	1,792		1,773
Dominion Gas Holdings, LLC
Regulatory Assets and Liablities [Line Items]
Deferred rate adjustment clause costs	2	[2]	7	[2]
Unrecovered gas costs	13	[4]	29	[4]
Other	1		2
Regulatory assets current	16	[5]	38	[5]
Unrecognized pension and other postretirement benefit costs	239	[6]	242	[6]
Deferred rate adjustment clause costs	75	[2]	71	[2]
Income taxes recoverable through future rates	24	[8]	24	[8]
Other	52		42
Regulatory assets-non-current	390		379	[15]
Total regulatory assets	406		417
PIPP	63	[10]	71	[10]
Other	16		4
Regulatory liabilities current	79	[11]	75	[11]
Provision for future cost of removal and AROs	172	[12]	172	[12]
Other	26		20
Regulatory liabilities-non-current	198	[16]	192	[16]
Total regulatory liabilities	$277		$267
[1]	Primarily reflects deferred fuel expenses for the Virginia jurisdiction of Virginia Power's generation operations. See Note 12 for more information.
[2]	Reflects deferrals under the electric transmission FERC formula rate and the deferral of costs associated with certain current and prospective rider projects for Virginia Power. Reflects deferrals of costs associated with certain current and prospective rider projects for Dominion Gas. See Note 12 for more information.
[3]	Legislation enacted in Virginia in April 2014 requires Virginia Power to defer operation and maintenance costs incurred in connection with the refueling of any nuclear-powered generating plant. These deferred costs will be amortized over the refueling cycle, not to exceed 18 months.
[4]	Reflects unrecovered gas costs at regulated gas operations, which are recovered through filings with the applicable regulatory authority.
[5]	Current regulatory assets are presented in other current assets in Dominion's and Dominion Gas' Consolidated Balance Sheets.
[6]	Represents unrecognized pension and other postretirement employee benefit costs expected to be recovered through future rates generally over the expected remaining service period of plan participants by certain of Dominion's and Dominion Gas' rate-regulated subsidiaries.
[7]	For jurisdictions subject to cost-based rate regulation, changes in the fair value of derivative instruments result in the recognition of regulatory assets or regulatory liabilities as they are expected to be recovered from or refunded to customers.
[8]	Amounts to be recovered through future rates to pay income taxes that become payable when rate revenue is provided to recover AFUDC-equity and depreciation of property, plant and equipment for which deferred income taxes were not recognized for ratemaking purposes, including amounts attributable to tax rate changes.
[9]	Dominion’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[10]	Under PIPP, eligible customers can make reduced payments based on their ability to pay. The difference between the customer's total bill and the PIPP plan amount is deferred and collected or returned annually under the PIPP rider according to East Ohio tariff provisions.
[11]	Current regulatory liabilities are presented in other current liabilities in the Companies' Consolidated Balance Sheets.
[12]	Rates charged to customers by the Companies' regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement.
[13]	Primarily reflects a regulatory liability representing amounts collected from Virginia jurisdictional customers and placed in external trusts (including income, losses and changes in fair value thereon) for the future decommissioning of Virginia Power's utility nuclear generation stations, in excess of the related AROs.
[14]	Virginia Power’s Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[15]	Dominion Gas’ Consolidated Balance Sheet at December 31, 2014 has been derived from the audited Consolidated Financial Statements at that date.
[16]	Noncurrent regulatory liabilities are presented in other deferred credits and other liabilities in Dominion Gas' Consolidated Balance Sheets.

Regulatory_Assets_and_Liabilit3

Regulatory Assets and Liabilities (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Public Utilities, General Disclosures [Line Items]
Regulatory assets past expenditures not earning return	$129
Period for which expenditures are expected to be recovered	2 years
Virginia Electric and Power Company
Public Utilities, General Disclosures [Line Items]
Regulatory assets past expenditures not earning return	97
Dominion Gas Holdings, LLC
Public Utilities, General Disclosures [Line Items]
Regulatory assets past expenditures not earning return	$30

Regulatory_Matters_Narrative_D

Regulatory Matters (Narrative) (Details) (USD $)	1 Months Ended						12 Months Ended
	31-May-12	Mar. 31, 2010	Apr. 30, 2008	Mar. 31, 2015	Feb. 28, 2015	Apr. 30, 2015	Dec. 31, 2014	Dec. 31, 2018	Dec. 31, 2017
						kV
Virginia Electric and Power Company
Regulatory Matters [Line Items]
ROE (percentage)			11.40%
Costs claimed to be unjust and excluded from transmission formula rate		$223,000,000
Potential settlement required annual payment for 10 Years	250,000
Period for annual settlement payment	10 years
Virginia Electric and Power Company | Virginia Regulation
Regulatory Matters [Line Items]
Percentage ROE for combined test periods				10.13%
Jurisdictional projected fuel expenses					1,600,000,000
Approved decrease amount					512,000,000
Virginia Electric and Power Company | Virginia Regulation | Subsequent Event | Surry Switching Station Transmission Line
Regulatory Matters [Line Items]
Kilo Volt Line						500
Virginia Electric and Power Company | Virginia Regulation | Deferred Fuel Costs
Regulatory Matters [Line Items]
Percentage of deferred fuel costs written off							50.00%
Virginia Electric and Power Company | Virginia Regulation | Deferred Fuel Costs | Electric fuel and other energy-related purchases
Regulatory Matters [Line Items]
Write off of deferred fuel balances							85,000,000
Write off of deferred fuel balances, net of tax							52,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider S
Regulatory Matters [Line Items]
Approved revenue requirement				245,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider BW | Subsequent Event
Regulatory Matters [Line Items]
Approved revenue requirement						111,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider R
Regulatory Matters [Line Items]
Approved revenue requirement				84,000,000
Virginia Electric and Power Company | Virginia Regulation | Riders C1A and C2A | Subsequent Event
Regulatory Matters [Line Items]
Approved decrease amount						7,000,000
Approved revenue requirement						37,000,000
Number of new energy efficiency programs						2
Term of energy efficiency programs						3 years
Combined cost cap of new energy efficiency programs						20,000,000
Virginia Electric and Power Company | Virginia Regulation | Rider B
Regulatory Matters [Line Items]
Approved revenue requirement				9,000,000
Number of power stations converted to biomass				3
East Ohio | Ohio Regulation | PIR Program
Regulatory Matters [Line Items]
Extension period of PIR program				5 years
Total annual investment				200,000,000
Percentage of capital investment increases				3.00%
Gross plant investment					155,000,000
Cumulative gross plant investment					829,000,000
Revenue requirement					108,000,000
East Ohio | Ohio Regulation | PIR Program | Scenario, Forecast
Regulatory Matters [Line Items]
Amount of investment increase								20,000,000	20,000,000
East Ohio | Ohio Regulation | AMR Program
Regulatory Matters [Line Items]
Projected revenue requirement					$8,000,000

Variable_Interest_Entities_Nar

Variable Interest Entities (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
	MW
	generator
Virginia Electric and Power Company
Variable Interest Entities [Line Items]
Long term capacity contract non utility generators (generators)	5
Aggregate generation capacity from long-term power and capacity contracts (MW)	870
Remaining purchase commitments	$585
Payment for electric capacity	53	56
Payment for electric energy	37	54
Shared services purchased	83	28
Virginia Electric and Power Company | Minimum
Variable Interest Entities [Line Items]
Contracts expiry date start range	2015
Virginia Electric and Power Company | Maximum
Variable Interest Entities [Line Items]
Contracts expiry date start range	2021
Dominion Gas Holdings, LLC
Variable Interest Entities [Line Items]
Shared services purchased	$83	$26

Significant_Financing_Transact2

Significant Financing Transactions - (Commercial Paper, Bank Loans and Letters of Credit Outstanding) (Details) (USD $)	Mar. 31, 2015		Jul. 31, 2014		Jul. 01, 2014		Dec. 31, 2014
Line of Credit Facility [Line Items]
Facility Limit	$4,500,000,000
Outstanding Commercial Paper	3,200,000,000
Outstanding Letters of Credit	48,000,000
Facility Capacity Available	1,252,000,000
Virginia Electric and Power Company
Line of Credit Facility [Line Items]
Facility Limit	1,750,000,000
Outstanding Commercial Paper	1,588,000,000
Outstanding Letters of Credit	0
Facility Capacity Available	162,000,000
Dominion Gas Holdings, LLC
Line of Credit Facility [Line Items]
Facility Limit	500,000,000
Outstanding Commercial Paper	280,000,000
Outstanding Letters of Credit	0
Facility Capacity Available	220,000,000
Credit Facility 4 Billion
Line of Credit Facility [Line Items]
Facility Limit	4,000,000,000	[1]
Outstanding Commercial Paper	3,112,000,000	[1]
Outstanding Letters of Credit	0	[1]
Facility Capacity Available	888,000,000	[1]
Credit Facility, to support letters of credit	1,500,000,000
Credit Facility 4 Billion | Virginia Electric and Power Company
Line of Credit Facility [Line Items]
Facility Limit	1,500,000,000	[2]	1,500,000,000	[1]	1,250,000,000	[1]
Outstanding Commercial Paper	1,500,000,000	[2]
Outstanding Letters of Credit	0	[2]
Facility Capacity Available	0	[2]
Credit Facility, to support letters of credit	1,500,000,000
Credit Facility 4 Billion | Dominion Gas Holdings, LLC
Line of Credit Facility [Line Items]
Facility Limit	500,000,000	[3]					1,000,000,000	[1]
Outstanding Commercial Paper	280,000,000	[3]
Outstanding Letters of Credit	0	[3]
Facility Capacity Available	220,000,000	[3]
Credit Facility, to support letters of credit	1,500,000,000
Credit Facility 500 Million
Line of Credit Facility [Line Items]
Facility Limit	500,000,000	[4]
Outstanding Commercial Paper	88,000,000	[4]
Outstanding Letters of Credit	48,000,000	[4]
Facility Capacity Available	364,000,000	[4]
Credit Facility 500 Million | Virginia Electric and Power Company
Line of Credit Facility [Line Items]
Facility Limit	250,000,000	[5]
Outstanding Commercial Paper	88,000,000	[5]
Outstanding Letters of Credit	0	[5]
Facility Capacity Available	162,000,000	[5]
Credit Facility 500 Million | Dominion Gas Holdings, LLC
Line of Credit Facility [Line Items]
Facility Limit	0	[6]
Outstanding Commercial Paper	0	[6]
Outstanding Letters of Credit	0	[6]
Facility Capacity Available	$0	[6]
[1]	This credit facility has a maturity date of April 2019, and 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]	This credit facility has a maturity date of April 2019, and 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. In January 2015, Virginia Power increased its sub-limit from $1.25 billion to $1.50 billion.
[3]	This credit facility has a maturity date of April 2019, and 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. Dominion Gas' current sub-limit under this credit facility can be increased or decreased multiple times per year, up to a maximum of $1.0 billion.
[4]	This credit facility has a maturity date of April 2019, and can be used to support bank borrowings, commercial paper and letter of credit issuances.
[5]	This credit facility has a maturity date of April 2019, and 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.
[6]	This credit facility has a maturity date of April 2019, and can be used to support bank borrowings, commercial paper and letter of credit issuances. Dominion Gas' current sub-limit under this credit facility can be increased or decreased multiple times per year.

Significant_Financing_Transact3

Significant Financing Transactions - (Narrative) (Details) (USD $)	3 Months Ended		1 Months Ended
Share data in Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Apr. 30, 2015
			Agreement
Debt Instrument [Line Items]
Issuance of common stock	$295,000,000	$0
Virginia Electric and Power Company
Debt Instrument [Line Items]
Number of joint revolving credit facilities	2
Credit facility	120,000,000
Virginia Electric and Power Company | Tax Exempt Debt
Debt Instrument [Line Items]
Variable rate tax-exempt financings	119,000,000
Dominion Gas Holdings, LLC
Debt Instrument [Line Items]
Number of joint revolving credit facilities	2
Shelf Registration for Sale of Common Stock through At-the-market Program
Debt Instrument [Line Items]
Number of sales agency agreements			4
Aggregate amount of common stock in which the company may offer under SEC shelf registration (up to $500 million)			500,000,000
Number of sales agents	2
Shares issued through at the market issuances	2,900,000
Issuance of common stock	219,000,000
Fees and commissions paid	2,000,000
Shelf Registration for Sale of Common Stock through At-the-market Program | Subsequent Event
Debt Instrument [Line Items]
Shares issued through at the market issuances				600,000
Issuance of common stock				43,000,000
Fees and commissions paid				$1,000,000
Common stock reserved for issuance in connection with stock purchase contracts				235

Commitments_and_Contingencies_1

Commitments and Contingencies (Narrative) (Details) (USD $)	1 Months Ended				3 Months Ended		12 Months Ended	1 Months Ended		56 Months Ended	1 Months Ended
	Jun. 30, 2014	Jul. 31, 2013	Sep. 30, 2011	Jul. 31, 2011	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Mar. 31, 2012	Dec. 31, 2014	Mar. 31, 2015	Oct. 31, 2014
	Unit	Unit	Party		Site		Facility	refueling_outage			Facility
Investments in and Advances to Affiliates [Line Items]
Extension period for MATS compliance	1 year
Number of coal fired generating units	2	3
Requested compliance extension under EPA Administrative Order	1 year
Amount company has spent for emission standards compliance					$1,014,000,000	$1,120,000,000
Number of parties issued UAO			22
Daily civil penalties for non compliance					37,500
Number of former manufactured gas plant sites					17					17
Number of facilities with CCR							8
Maximum period for consideration of CO2 emissions from biomass projects				3 years
Purchased surety bonds					134,000,000					134,000,000
Authorized issuance of standby letters of credit					48,000,000					48,000,000
Third Party and Equity Method Investee
Investments in and Advances to Affiliates [Line Items]
Amount of civil penalty					74,000,000					74,000,000
NRC Safety Enhancements
Investments in and Advances to Affiliates [Line Items]
Number of refueling outages								2
Implementation period								4 years
Possum Point Power Station | Other Operations and Maintenance Expense
Investments in and Advances to Affiliates [Line Items]
Charge as a result of settlement offer									121,000,000
Virginia Electric and Power Company
Investments in and Advances to Affiliates [Line Items]
Amount company has spent for emission standards compliance					583,000,000	691,000,000
Number of former manufactured gas plant sites					3					3
Purchased surety bonds					65,000,000					65,000,000
Dominion Gas Holdings, LLC
Investments in and Advances to Affiliates [Line Items]
Amount company has spent for emission standards compliance					128,000,000	107,000,000
Number of former manufactured gas plant sites					12					12
Purchased surety bonds					30,000,000					30,000,000
CAA
Investments in and Advances to Affiliates [Line Items]
Number of states under EPA replacement rule				28
Emissions of fossil fuel fired electric generating units (MW)				25
Number of groups of affected states				2
Amount company has spent for emission standards compliance										2,000,000
CWA
Investments in and Advances to Affiliates [Line Items]
Number of facilities that may be subject to final regulations											14
CWA | Virginia Electric and Power Company
Investments in and Advances to Affiliates [Line Items]
Number of facilities that may be subject to final regulations											11
Remediation program
Investments in and Advances to Affiliates [Line Items]
Preliminary costs for options under evaluation for site, minimum					1,000,000					1,000,000
Preliminary costs for options under evaluation for site, maximum					22,000,000					22,000,000
Breach of Contract Lawsuit | Pending Litigation
Investments in and Advances to Affiliates [Line Items]
Accrued liability for legal matter					$6,000,000					$6,000,000

Commitments_and_Contingencies_2

Commitments and Contingencies (Subsidiary Guarantees) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
	guarantee
Commitments and Contingencies [Line Items]
Stated Limit	$6,011,000,000
Value	1,388,000,000	[1]
Number of DEI subsidiaries	2
Minimum
Commitments and Contingencies [Line Items]
Annual future contributions	4,000,000
Maximum
Commitments and Contingencies [Line Items]
Annual future contributions	19,000,000
Third Party and Equity Method Investee
Commitments and Contingencies [Line Items]
Stated Limit	39,000,000
Cove Point
Commitments and Contingencies [Line Items]
Stated Limit	150,000,000
Number of guarantees with no stated limit	2
Number of guarantees	1
Aggregate limit	1,750,000,000
Annual draw limit	175,000,000
Subsidiary Debt
Commitments and Contingencies [Line Items]
Stated Limit	27,000,000	[2]
Value	27,000,000	[1],[2]
Commodity Transactions
Commitments and Contingencies [Line Items]
Stated Limit	2,816,000,000	[3]
Value	1,075,000,000	[1],[3]
Nuclear Obligations
Commitments and Contingencies [Line Items]
Stated Limit	199,000,000	[4]
Value	79,000,000	[1],[4]
Nuclear Obligations | Millstone
Commitments and Contingencies [Line Items]
Stated Limit	150,000,000
Nuclear Obligations | Kewaunee
Commitments and Contingencies [Line Items]
Stated Limit	60,000,000
Cove Point
Commitments and Contingencies [Line Items]
Stated Limit	1,910,000,000	[5]
Value	0	[1],[5]
Solar
Commitments and Contingencies [Line Items]
Stated Limit	531,000,000	[6]
Value	171,000,000	[1],[6]
Other
Commitments and Contingencies [Line Items]
Stated Limit	528,000,000	[7]
Value	36,000,000	[1],[7]
Through 2019 | Third Party and Equity Method Investee
Commitments and Contingencies [Line Items]
Stated Limit	$63,000,000
[1]	Represents the estimated portion of the guarantee's stated limit that is utilized as of March 31, 2015 based upon prevailing economic conditions and fact patterns specific to each guarantee arrangement. For those guarantees related to obligations that are recorded as liabilities by Dominion's subsidiaries, the value includes the recorded amount.
[2]	Guarantee of debt of a DEI subsidiary. In the event of default by the subsidiary, Dominion would be obligated to repay such amounts.
[3]	Guarantees related to commodity commitments of certain subsidiaries, including subsidiaries of Virginia Power, Dominion Gas and DEI. These guarantees were provided to counterparties in order to facilitate physical and financial transactions in gas, oil, electricity, pipeline capacity, transportation and related commodities and services. If any of these subsidiaries fail to perform or pay under the contracts and the counterparties seek performance or payment, Dominion would be obligated to satisfy such obligation. Dominion and its subsidiaries receive similar guarantees as collateral for credit extended to others. The value provided includes certain guarantees that do not have stated limits.
[4]	Guarantees related to certain DEI subsidiaries' potential retrospective premiums that could be assessed if there is a nuclear incident under Dominion's nuclear insurance programs and guarantees for a DEI subsidiary's and Virginia Power's commitment to buy nuclear fuel. Excludes Dominion's agreement to provide up to $150 million and $60 million to two DEI subsidiaries to pay the operating expenses of Millstone (in the event of a prolonged outage) and Kewaunee, respectively, as part of satisfying certain NRC requirements concerned with ensuring adequate funding for the operations of nuclear power stations. The agreement for Kewaunee also provides for funds through the completion of decommissioning.
[5]	Guarantees related to Cove Point, in support of terminal services, transportation and construction. Two of the guarantees have no stated limit, one guarantee has a $150 million limit, and one guarantee has a $1.75 billion aggregate limit with an annual draw limit of $175 million.
[6]	Includes guarantees to facilitate the development of solar projects including guarantees to support the issuance of full notice to proceed under EPC agreements. Includes certain guarantees that do not have stated limits. Also includes guarantees entered into by DEI on behalf of certain subsidiaries to facilitate the acquisition and development of solar projects.
[7]	Guarantees related to other miscellaneous contractual obligations such as leases, environmental obligations and construction projects. Also includes guarantees related to certain DEI subsidiaries' obligations for equity capital contributions and energy generation associated with Fowler Ridge and NedPower. As of March 31, 2015, Dominion's maximum remaining cumulative exposure under these equity funding agreements is $63 million through 2019 and its maximum annual future contributions could range from approximately $4 million to $19 million. The value provided includes certain guarantees that do not have stated limits.

Credit_Risk_Narrative_Details

Credit Risk (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	Counterparty
Concentration Risk and Guarantor Obligations [Line Items]
Gross credit exposure	$356
Number of counterparties	0
Additional collateral to be posted if the credit related contingent features were triggered	16		20
Collateral posted	96		1
Fair value of all derivative instruments not fully collateralized	40		49
Gas transportation and storage	471	444
Investment Grade | Investment grade counterparties
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	89.00%
Investment Grade | Counterparty, A
Concentration Risk and Guarantor Obligations [Line Items]
Amount of exposure for single counterparty	46
Dominion Gas Holdings, LLC
Concentration Risk and Guarantor Obligations [Line Items]
Gas transportation and storage	412	396
Dominion Gas Holdings, LLC | Storage and Transportation Revenue | Customer Concentration Risk
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	94.00%
Number of customers	248
Dominion Gas Holdings, LLC | Ten Largest Customers | Storage and Transportation Revenue | Customer Concentration Risk
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	42.00%
Number of customers	10
Dominion Gas Holdings, LLC | Thirty Largest Customers | Storage and Transportation Revenue | Customer Concentration Risk
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	73.00%
Number of customers	30
Dominion Gas Holdings, LLC | Long Term Capacity Contracts | Storage and Transportation Revenue | Customer Concentration Risk
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	98.00%
Term of contract	2 years
Dominion Gas Holdings, LLC | Annual Capacity Contracts | Storage and Transportation Revenue | Customer Concentration Risk
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	2.00%
Dominion Gas Holdings, LLC | Unsubscribed Firm Transportation Capacity | Storage and Transportation Revenue | Customer Concentration Risk
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	1.00%
DTI | Thirty Largest Customers | Storage and Transportation Revenue | Customer Concentration Risk
Concentration Risk and Guarantor Obligations [Line Items]
Gas transportation and storage	$201
East Ohio | Storage and Transportation Revenue | Customer Concentration Risk
Concentration Risk and Guarantor Obligations [Line Items]
Concentration risk, percentage (percentage)	99.00%

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Related Party Transaction [Line Items]
Derivative Asset	$679,000,000				$719,000,000
Derivative Liabilities	765,000,000				794,000,000
Virginia Electric and Power Company
Related Party Transaction [Line Items]
Derivative Asset	106,000,000				113,000,000
Derivative Liabilities	139,000,000				87,000,000
Commodity purchases from affiliates	252,000,000		202,000,000
Services provided to affiliates	110,000,000	[1]	108,000,000	[1]
Sales of natural gas and transportation and storage services to affiliates	5,000,000		5,000,000
Outstanding borrowings, net of repayments, under money pool for non-regulated subsidiaries	0				0
Dominion Gas Holdings, LLC
Related Party Transaction [Line Items]
Amounts due from Dominion	4,000,000	[2]			3,000,000	[2]
Commodity purchases from affiliates	2,000,000		18,000,000
Services provided to affiliates	20,000,000		13,000,000
Sales of natural gas and transportation and storage services to affiliates	18,000,000		21,000,000
Customer receivables from related parties	11,000,000	[3]			22,000,000	[3]
Affiliated notes receivable	10,000,000	[4]			9,000,000	[4]
Dominion Gas Holdings, LLC | Revolving Credit Facility | IRCA
Related Party Transaction [Line Items]
Borrowings under IRCA	39,000,000				384,000,000
Dominion Gas Holdings, LLC | Variable Interest Entity, Primary Beneficiary
Related Party Transaction [Line Items]
Customer receivables from related parties	5,000,000				17,000,000
Dominion Gas Holdings, LLC | Services provided by affiliates
Related Party Transaction [Line Items]
Commodity purchases from affiliates	34,000,000	[1]	28,000,000	[1]
Affiliated Entity | Virginia Electric and Power Company | Commodity Derivative Contracts with Affiliates
Related Party Transaction [Line Items]
Derivative Asset	24,000,000
Derivative Liabilities					7,000,000
Principal Owner | Virginia Electric and Power Company
Related Party Transaction [Line Items]
Short term demand note	10,000,000				427,000,000
Other deferred credits and other liabilities
Related Party Transaction [Line Items]
Amounts due to Dominion	243,000,000				219,000,000
Other deferred charges and other assets
Related Party Transaction [Line Items]
Amounts due from Dominion	$46,000,000
[1]	Includes capitalized expenditures.
[2]	Amounts are presented in other current assets in Dominion Gas' Consolidated Balance Sheets.
[3]	Includes $5 million and $17 million due from Atlantic Coast Pipeline, a related party VIE, at March 31, 2015 and December 31, 2014, respectively.
[4]	Amounts are presented in other deferred charges and other assets in Dominion Gas' Consolidated Balance Sheets.

Employee_Benefit_Plans_Net_Per

Employee Benefit Plans (Net Periodic Benefit Cost) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$32	$29
Interest cost	72	72
Expected return on plan assets	-133	-125
Amortization of prior service cost (credit)	0	1
Amortization of net actuarial loss	40	28
Net periodic benefit cost (credit)	11	5
Pension Benefits | Dominion Gas Holdings, LLC
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3
Interest cost	7	7
Expected return on plan assets	-31	-29
Amortization of net actuarial loss	5	5
Net periodic benefit cost (credit)	-16	-14
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	10	8
Interest cost	17	17
Expected return on plan assets	-29	-28
Amortization of prior service cost (credit)	-7	-7
Amortization of net actuarial loss	1	0
Net periodic benefit cost (credit)	-8	-10
Other Postretirement Benefits | Dominion Gas Holdings, LLC
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1
Interest cost	3	3
Expected return on plan assets	-6	-5
Amortization of net actuarial loss	1	0
Net periodic benefit cost (credit)	$0	($1)

Employee_Benefit_Plans_Narrati

Employee Benefit Plans (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined benefit pension plans and OPEB plans	$0
Expected contribution to voluntary employees' beneficiary association	12,000,000
Dominion Gas Holdings, LLC
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined benefit pension plans and OPEB plans	0
Expected contribution to voluntary employees' beneficiary association	12,000,000
Amounts due from Dominion	4,000,000	[1]	3,000,000	[1]
Pension Benefits | Dominion Gas Holdings, LLC | Dominion | Noncurrent Pension and Other Postretirement Benefit Assets
Defined Benefit Plan Disclosure [Line Items]
Amounts due from Dominion	623,000,000		614,000,000
Other Postretirement Benefits | Dominion Gas Holdings, LLC | Dominion | Other Deferred Credits and Other Liabilities
Defined Benefit Plan Disclosure [Line Items]
Amounts due to Dominion	$6,000,000		$7,000,000
[1]	Amounts are presented in other current assets in Dominion Gas' Consolidated Balance Sheets.

Operating_Segments_Narrative_D

Operating Segments (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
After tax net expense	$2,407,000,000	$2,862,000,000
Corporate and Other
Segment Reporting Information [Line Items]
After tax net expenses	48,000,000	228,000,000
All segments
Segment Reporting Information [Line Items]
After tax net expenses	45,000,000	217,000,000
Dominion Generation
Segment Reporting Information [Line Items]
Net gain on investments	27,000,000
Net gain on investments, after tax	17,000,000
Loss related to restructuring of producer services		47,000,000
Restructuring after tax		33,000,000
Net loss		147,000,000
After tax net loss		90,000,000
Net gain (loss) on sale		100,000,000
Net gain (loss) on sale, after tax		57,000,000
Write off of goodwill		31,000,000
Dominion Generation | PJM
Segment Reporting Information [Line Items]
Billing adjustment	17,000,000
Billing adjustment, net of tax	10,000,000
Dominion Generation | Virginia Regulation | Deferred Fuel Costs
Segment Reporting Information [Line Items]
Write off of deferred fuel balances	85,000,000
Write off of deferred fuel balances, net of tax	52,000,000
Dominion Energy | Virginia legislation
Segment Reporting Information [Line Items]
Charge associated with North Anna and offshore wind legislation		319,000,000
Charges associated with North Anna and offshore wind facilities, net of tax		193,000,000
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
After tax net expense	1,612,000,000	1,370,000,000
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
After tax net expense	61,000,000
Virginia Electric and Power Company | Dominion Generation | PJM
Segment Reporting Information [Line Items]
Billing adjustment	15,000,000
Billing adjustment, net of tax	9,000,000
Virginia Electric and Power Company | Dominion Generation | Virginia Regulation | Deferred Fuel Costs
Segment Reporting Information [Line Items]
Write off of deferred fuel balances	85,000,000
Write off of deferred fuel balances, net of tax	52,000,000
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
After tax net expense	260,000,000	304,000,000
Dominion Gas Holdings, LLC | Corporate and Other
Segment Reporting Information [Line Items]
After tax net expenses	$0	$0

Operating_Segments_Schedule_of

Operating Segments (Schedule of Segment Reporting Information, by Segment) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Segment Reporting Information [Line Items]
Total revenue from external customers	$3,409		$3,630
Total operating revenue	3,409		3,630
Net income attributable to Dominion	536		379
Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	0		0
DVP
Segment Reporting Information [Line Items]
Total revenue from external customers	564		502
Total operating revenue	569		504
Net income attributable to Dominion	140		131
DVP | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	5		2
Dominion Generation
Segment Reporting Information [Line Items]
Total revenue from external customers	2,122		2,260
Total operating revenue	2,148		2,284
Net income attributable to Dominion	282		309
Dominion Generation | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	26		24
Dominion Energy
Segment Reporting Information [Line Items]
Total revenue from external customers	379		362
Total operating revenue	739		851
Net income attributable to Dominion	207		208
Dominion Energy | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	360		489
Corporate and Other
Segment Reporting Information [Line Items]
Total revenue from external customers	-13		-2
Total operating revenue	129		145
Net income attributable to Dominion	-93		-269
Corporate and Other | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	142		147
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Total revenue from external customers	357		508
Total operating revenue	-176		-154
Net income attributable to Dominion	0		0
Adjustments/Eliminations | Intersegment revenue
Segment Reporting Information [Line Items]
Total revenue from external customers	-533		-662
Virginia Electric and Power Company
Segment Reporting Information [Line Items]
Total revenue from external customers	2,137	[1]	1,983	[1]
Total operating revenue	2,137		1,983
Net income attributable to Dominion	269		324
Virginia Electric and Power Company | DVP
Segment Reporting Information [Line Items]
Total operating revenue	567		502
Net income attributable to Dominion	140		134
Virginia Electric and Power Company | Dominion Generation
Segment Reporting Information [Line Items]
Total operating revenue	1,585		1,481
Net income attributable to Dominion	190		189
Virginia Electric and Power Company | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue	-15		0
Net income attributable to Dominion	-61		1
Dominion Gas Holdings, LLC
Segment Reporting Information [Line Items]
Total revenue from external customers	531	[2]	569	[2]
Total operating revenue	531		569
Net income attributable to Dominion	161		164
Dominion Gas Holdings, LLC | Dominion Energy
Segment Reporting Information [Line Items]
Total operating revenue	531		569
Net income attributable to Dominion	164		166
Dominion Gas Holdings, LLC | Corporate and Other
Segment Reporting Information [Line Items]
Total operating revenue	0		0
Net income attributable to Dominion	($3)		($2)
[1]	See Note 17 for amounts attributable to affiliates.
[2]	See Note 17 for amounts attributable to related parties.