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Cash Based Performance Grant Amount

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Cash Based Performance Grant Liability Accrued

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Cash Based Performance Grant Total Expected Award

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Number Of Sales Agency Agreements

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Number of Sales Agents

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Share Based Compensation Arrangement By Share Based Payment Award Award Shares Issued Amount Maximum Percentage

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Share Based Compensation Arrangement By Share Based Payment Award Award Shares Issued Amount Minimum Percentage

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Share Based Compensation Arrangement By Share Based Payment Award Award Shares Issued Maximum Percentage

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Share Based Compensation Arrangement By Share Based Payment Award Award Shares Issued Minimum Percentage

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Share Based Compensation Arrangement By Share Based Payment Award Equity Issued

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ShareBasedCompensationArrangementByShare Based Payment Award Shares Expected To Be Issued In Period

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate number of common shares reserved for future issuance.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The cash inflow from the additional capital contribution to the entity.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of share instruments newly issued under a share-based compensation plan.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

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Equity (Narrative) (Details) (USD $)	1 Months Ended	12 Months Ended				1 Months Ended				2 Months Ended	1 Months Ended	0 Months Ended
Equity (Narrative) (Details) (USD $)	Dec. 31, 2014 Agreement	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2007	Feb. 28, 2013	Feb. 28, 2011	Jan. 31, 2014	Dec. 31, 2013	Feb. 27, 2015 agent	Jan. 31, 2015	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash proceeds		$ 205,000,000	$ 278,000,000	$ 265,000,000
Number of sales agency agreements	4d_NumberOfSalesAgencyAgreements
Expected issuance of common stock in 2012 through employee savings plans, direct stock purchase and dividend reinvestment plans, and other employee and director benefit plans	500,000,000
Net fees and commissions paid			2,000,000us-gaap_PaymentsOfStockIssuanceCosts
Shares reserved and available for issuance	7,000,000	7,000,000
Compensation cost related to stock-based compensation		39,000,000	31,000,000	25,000,000
Tax benefit from stock awards and stock options exercised		14,000,000	11,000,000	8,000,000
Tax benefits from the vesting of restricted stock awards		1,000,000	1,000,000	10,000,000
Dominion Direct, Employee Stock Awards, Employee Savings Plans, Director Stock Compensation Plans, and Contingent Convertible Senior Notes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved and available for issuance	56,000,000	56,000,000
Stock-Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum term of stock based awards		8 years
Shares were available for future grants	31,000,000	31,000,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Unrecognized compensation cost related to nonvested awards	27,000,000	27,000,000
Expected weighted-average period recognized for the unrecognized compensation cost		1 year 9 months 6 days
Fair value of restricted stock awards that vested		19,000,000	20,000,000	30,000,000
Goal-Based Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Number of performance metrics		2
Performance metrics period		2 years
Shares issued minimum percentage		0.00%
Shares issued maximum percentage		200.00%
Targeted shares expected to be issued	17,000	17,000
Cash-Based Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash-based performance grants minimum					0.00%
Cash-based performance grants maximum					200.00%
February 2011 Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance metrics				2
Cash based performance grant actual payout						2,000,000	6,000,000
Cash-based performance grants						8,000,000
February 2012 Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance metrics			2
Cash based performance grant actual payout	14,000,000							12,000,000	8,000,000
Cash based performance grants, total expected award	21,000,000
Cash based performance grant liability accrued		7,000,000
February 2013 Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance metrics		2
Cash-based performance grants		13,000,000
Cash based performance grant liability accrued		3,000,000
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash proceeds										207,000,000
Number of sales agents										1
Stock issued by sales agents										2,700,000
Net fees and commissions paid										2,000,000
Shares reserved and available for issuance										291,000,000
Subsequent Event \| Goal-Based Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares converted to one class to another											7,000
Dominion Gas Holdings, LLC
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of limited liability membership interests												100.00%
Various Programs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares issued	3,800,000	3,800,000
Dominion Direct, employee savings plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares issued	2,900,000	2,900,000
Cash proceeds		$ 205,000,000