Entity Central Index Key
Electric fuel and other energy related purchases.
Costs incurred in purchasing (excess) electric capacity.
Costs incurred for purchased gas.
Other operating and maintenance expenses including selling, general and administrative expenses.
The amount of operating expenses, attributable to affiliated suppliers, for the period that are associated with the company's normal revenue producing operations.
The amount of operating expenses for the period that are associated with the company's normal revenue producing operations.
Other noncurrent investments not otherwise specified in the taxonomy.
Deferred charges, regulatory assets, and other assets, noncurrent.
Depreciation Depletion and Amortization Including Nuclear Fuel
Provision for refunds and rate credits.
Asset Impairments And Other Charges
Other operating revenues or adjustment to other operating revenues.
Decommissioning trust securities unrealized gains.
Decommissioning trust securities unrealized losses.
Operating and finance lease liability, current.
Operating and finance lease liability, noncurrent.
Document And Entity Information [Abstract]
Document And Entity Information [Abstract]
Document Information [Table]
Document Information [Table]
Legal Entity
Legal Entity [Axis]
Entity
Entity [Domain]
Virginia Electric and Power Company.
Virginia Electric and Power Company
Virginia Electric And Power Company [Member]
Dominion Energy Gas Holdings, LLC.
Dominion Energy Gas Holdings, LLC
Dominion Energy Gas Holdings L L C [Member]
Document Information [Line Items]
Document Information [Line Items]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Trading Symbol
Trading Symbol
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Common Stock, Shares Outstanding
Entity Common Stock Shares Outstanding
Income Statement [Abstract]
Statement [Table]
Statement [Table]
Statement [Line Items]
Statement [Line Items]
Operating Revenue
Revenues
Operating Expenses
Costs And Expenses [Abstract]
Electric fuel and other energy-related purchases
Electric Fuel And Other Energy Related Purchases
Purchased electric capacity
Purchased Excess Electric Capacity
Purchased gas
Purchased Gas
Other energy-related purchases
Utilities Operating Expense Gas And Petroleum Purchased
Other operations and maintenance
Other Operations And Maintenance
Affiliated suppliers
Affiliated Suppliers
Other
Other
Depreciation and amortization
Depreciation And Amortization
Other taxes
Taxes Excluding Income And Excise Taxes
Impairment of assets and other charges
Asset Impairment Charges
Gains on sales of assets
Gain Loss On Disposition Of Assets
Total operating expenses
Costs And Expenses
Income (loss) from operations
Operating Income Loss
Earnings from equity method investee
Income Loss From Equity Method Investments
Other income
Other Nonoperating Income Expense
Interest and related charges
Interest And Debt Expense
Income (loss) from operations including noncontrolling interests before income tax expense
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
Income tax expense
Income Tax Expense Benefit
Net Income (Loss) Including Noncontrolling Interests
Profit Loss
Noncontrolling Interests
Net Income Loss Attributable To Noncontrolling Interest
Net Income (loss)
Net Income Loss
Earnings Per Common Share
Earnings Per Share Basic And Diluted [Abstract]
Net income (loss) attributable to Dominion Energy - Basic
Earnings Per Share Basic
Net income (loss) attributable to Dominion Energy - Diluted
Earnings Per Share Diluted
Amounts reclassified to net income loss.
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interests
Net income
Other comprehensive income (loss), net of taxes:
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]
Net deferred gains (losses) on derivatives-hedging activities
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax
Changes in unrealized net gains (losses) on investment securities
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
Amounts reclassified to net income:
Amounts Reclassified To Net Income Loss [Abstract]
Net derivative (gains) losses-hedging activities
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax
Net realized (gains) losses on investment securities
Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Sale Of Securities Net Of Tax
Net pension and other postretirement benefit costs
Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans Net Of Tax
Total other comprehensive income (loss)
Other Comprehensive Income Loss Net Of Tax
Comprehensive income (loss) including noncontrolling interests
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
Comprehensive income attributable to noncontrolling interests
Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
Comprehensive income (loss)
Comprehensive Income Net Of Tax
Net deferred gains (losses) on derivative-hedging activities, tax
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax
Changes in unrealized net gains (losses) on investment securities, tax
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
Net derivative (gains) losses-hedging activities, tax
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax
Net realized gains on investment securities, tax
Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Sale Of Securities Tax
Net pension and other postretirement benefit costs, tax
Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans Tax
Deferred Charges, Regulatory Assets, and Other Assets, Noncurrent [Abstract]
Long term debt including capital lease.
Affiliated portion of collateralized/uncollateralized debt obligations due beyond one year/operating cycle. Subordinated debt places a lender in a lien position behind the primary lender of the company.
Remarketable Subordinated Notes, Noncurrent
Statement Of Financial Position [Abstract]
ASSETS
Assets [Abstract]
Current Assets
Assets Current [Abstract]
Cash and cash equivalents
Cash And Cash Equivalents At Carrying Value
Customer receivables (less allowance for doubtful accounts)
Accounts Receivable Net Current
Other receivables (less allowance for doubtful accounts)
Other Receivables Net Current
Affiliated receivables
Due From Related Parties Current
Inventories
Inventory Net
Gas imbalances
Gas Imbalance Asset Liability
Prepayments
Prepaid Expense Current
Regulatory assets
Regulatory Assets Current
Other
Other Assets Current
Total current assets
Assets Current
Investments
Long Term Investments [Abstract]
Nuclear decommissioning trust funds
Decommissioning Fund Investments
Investment in equity method affiliates
Equity Method Investments
Other
Other Long Term Investments And Marketable Securities
Total investments
Long Term Investments
Property, Plant and Equipment
Property Plant And Equipment Net [Abstract]
Property, plant and equipment
Property Plant And Equipment Gross
Accumulated depreciation, depletion and amortization
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Total property, plant and equipment, net
Property Plant And Equipment Net
Deferred Charges and Other Assets
Deferred Charges Regulatory Assets And Other Assets Noncurrent [Abstract]
Goodwill
Goodwill
Pension and other postretirement benefit assets
Defined Benefit Plan Assets For Plan Benefits Noncurrent
Intangible assets, net
Intangible Assets Net Excluding Goodwill
Regulatory assets
Regulatory Assets Noncurrent
Operating lease assets
Operating Lease Right Of Use Asset
Other
Other Assets Noncurrent
Total deferred charges and other assets
Deferred Charges Regulatory Assets And Other Assets Noncurrent
Total assets
Assets
Customer receivables, allowance for doubtful accounts
Allowance For Doubtful Accounts Receivable Current
Other receivables, allowance for doubtful accounts
Allowance For Doubtful Other Receivables Current
LIABILITIES AND EQUITY
Liabilities And Stockholders Equity [Abstract]
Current Liabilities
Liabilities Current [Abstract]
Securities due within one year
Long Term Debt And Capital Lease Obligations Current
Securities due within one year
Long Term Debt Current
Credit facility borrowings
Lines Of Credit Current
Short-term debt
Short Term Borrowings
Accounts payable
Accounts Payable Current
Payables to affiliates
Due To Related Parties Current
Affiliated current borrowings
Due To Affiliate Current
Accrued interest, payroll and taxes
Accrued Liabilities Current
Asset retirement obligations
Asset Retirement Obligation Current
Regulatory liabilities
Regulatory Liability Current
Other
Other Liabilities Current
Total current liabilities
Liabilities Current
Long-Term Debt
Long Term Debt Noncurrent [Abstract]
Long-term debt
Long Term Debt Including Capital Lease
Junior subordinated notes
Subordinated Debt Long Term Affiliates
Remarketable subordinated notes
Remarketable Subordinated Notes Noncurrent
Total long-term debt
Long Term Debt And Capital Lease Obligations
Long-Term Debt
Long Term Debt Noncurrent
Deferred Credits and Other Liabilities
Other Liabilities Noncurrent [Abstract]
Deferred income taxes and investment tax credits
Deferred Tax Liabilities Noncurrent
Regulatory liabilities
Regulatory Liability Noncurrent
Asset retirement obligations
Asset Retirement Obligations Noncurrent
Operating lease liabilities
Operating Lease Liability Noncurrent
Other
Other Liabilities Noncurrent
Total deferred credits and other liabilities
Deferred Credits And Other Liabilities
Total liabilities
Liabilities
Commitments and Contingencies (see Note 17)
Commitments And Contingencies
Equity
Stockholders Equity [Abstract]
Common stock - no par
Common Stock Value
Other paid-in capital
Additional Paid In Capital Common Stock
Retained earnings
Retained Earnings Accumulated Deficit
Membership interests
Members Capital
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income Loss Net Of Tax
Total common shareholders' equity
Stockholders Equity
Noncontrolling interests
Minority Interest
Total equity
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
Total liabilities and equity
Liabilities And Stockholders Equity
Common stock, shares authorized
Common Stock Shares Authorized
Common stock, shares outstanding
Common Stock Shares Outstanding
Cumulative effect of changes in accounting principle.
Stock Awards And Stock Options Exercise
Acquisition of public interest, increase (decrease) in equity and noncontrolling interest from acquisition, shares.
Acquisition of public interest, amount of increase (decrease) in equity and noncontrolling interest from acquisition.
Remeasurement of noncontrolling interest.
Statement Of Stockholders Equity [Abstract]
Equity Components
Statement Equity Components [Axis]
Equity Component
Equity Component [Domain]
Common Stock
Common Stock [Member]
Retained Earnings
Retained Earnings [Member]
AOCI
Accumulated Other Comprehensive Income [Member]
Total Common Shareholders' Equity
Parent [Member]
Noncontrolling Interests
Noncontrolling Interest [Member]
Other Paid-In Capital
Other Additional Capital [Member]
Member Units
Member Units [Member]
Beginning balance
Beginning balance (in shares)
Shares Outstanding
Cumulative-effect of changes in accounting principles
Cumulative Effect Of Changes In Accounting Principle
Issuance of common stock
Stock Issued During Period Value New Issues
Issuance of common stock (in shares)
Stock Issued During Period Shares New Issues
Acquisition of SCANA
Stock Issued During Period Value Acquisitions
Acquisition of SCANA (in shares)
Stock Issued During Period Shares Acquisitions
Acquisition of public interest in Dominion Energy Midstream
Acquisition Of Public Interest Amount Of Increase Decrease In Equity And Noncontrolling Interest From Acquisition
Acquisition of public interest in Dominion Energy Midstream (in shares)
Acquisition Of Public Interest Increase Decrease In Equity And Noncontrolling Interest From Acquisition Shares
Sale of Dominion Energy Midstream common units - net of offering costs
Noncontrolling Interest Increase From Subsidiary Equity Issuance
Purchase of Dominion Energy Midstream common units
Minority Interest Decrease From Redemptions
Minority interest decrease from redemptions, number of units.
Purchase of Dominion Energy Midstream common units (in shares)
Minority Interest Decrease From Redemptions Number Of Units
Remeasurement of noncontrolling interest in Dominion Energy Midstream
Remeasurement Of Noncontrolling Interest
Stock awards (net of change in unearned compensation)
Stock Awards And Stock Options Exercise
Dividends and distributions
Dividends Cash
Distributions
Distribution Made To Limited Liability Company L L C Member Cash Distributions Declared
Other comprehensive income (loss), net of tax
Other
Stockholders Equity Other
Ending balance
Ending balance (in shares)
Dividends declared per common share
Common Stock Dividends Per Share Declared
Statement Of Cash Flows [Abstract]
Operating Activities
Net Cash Provided By Used In Operating Activities [Abstract]
Adjustments to reconcile net income (loss) including noncontrolling interests to net cash provided by operating activities:
Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]
Gains on sales of assets
Gain Loss On Disposition Of Assets1
Depreciation, depletion and amortization (including nuclear fuel)
Depreciation Depletion And Amortization Including Nuclear Fuel
Deferred income taxes and investment tax credits
Deferred Income Taxes And Tax Credits
Provision for refunds and rate credits to electric utility customers
Provision For Refunds And Rate Credits
Impairment of assets and other charges
Asset Impairments And Other Charges
Net (gains) losses on nuclear decommissioning trust funds and other investments
Gain Loss On Investments
Revision to future ash pond and landfill closure costs
Environmental Remediation Expense
Provision for rate credits to customers
Restructuring Reserve Accrual Adjustment1
Other adjustments
Other Noncash Income Expense
Changes in:
Increase Decrease In Operating Capital [Abstract]
Accounts receivable
Increase Decrease In Accounts Receivable
Affiliated receivables and payables
Increase Decrease In Due From Affiliates Current
Inventories
Increase Decrease In Inventories
Deferred fuel and purchased gas costs, net
Increase Decrease In Deferred Fuel Costs
Prepayments
Increase Decrease In Prepaid Expense
Accounts payable
Increase Decrease In Accounts Payable
Accrued interest, payroll and taxes
Increase Decrease In Accrued Liabilities
Pension and other postretirement benefits
Increase Decrease In Pension And Postretirement Obligations
Customer deposits
Increase Decrease In Contract With Customer Liability
Margin deposit assets and liabilities
Increase Decrease In Margin Deposits Outstanding
Other operating assets and liabilities
Increase Decrease In Other Operating Capital Net
Net cash provided by operating activities
Net Cash Provided By Used In Operating Activities
Investing Activities
Net Cash Provided By Used In Investing Activities [Abstract]
Plant construction and other property additions (including nuclear fuel)
Payments To Acquire Property Plant And Equipment
Purchases of nuclear fuel
Payments For Nuclear Fuel
Cash and restricted cash acquired in the SCANA Combination
Cash Acquired From Acquisition
Acquisition of solar development projects
Payments To Acquire Projects
Proceeds from sales of securities
Proceeds From Sale And Maturity Of Marketable Securities
Purchases of securities
Payments To Acquire Marketable Securities
Proceeds from sales of assets and equity method investments
Proceeds From Sale Of Productive Assets
Contributions to equity method affiliates
Payments To Acquire Equity Method Investments
Proceeds from assignments of shale development rights
Proceeds From Sale Of Land Held For Use
Other
Payments For Proceeds From Other Investing Activities
Net cash used in investing activities
Net Cash Provided By Used In Investing Activities
Financing Activities
Net Cash Provided By Used In Financing Activities [Abstract]
Issuance (repayment) of short-term debt, net
Proceeds From Repayments Of Short Term Debt
Issuance of short-term notes
Proceeds From Short Term Debt
Repayment of credit facility borrowings
Repayments Of Long Term Lines Of Credit
Issuance of long-term debt
Proceeds From Issuance Of Long Term Debt
Issuance (repayment) of affiliated current borrowings, net
Proceeds From Repayments Of Related Party Debt
Repayment of long-term debt, including redemption premiums
Repayments Of Long Term Debt
Issuance of common stock
Proceeds From Issuance Of Common Stock
Common dividend payments
Payments Of Dividends Common Stock
Distribution payments to parent
Payments Of Distributions To Affiliates
Other
Proceeds From Payments For Other Financing Activities
Net cash provided by (used in) financing activities
Net Cash Provided By Used In Financing Activities
Increase (decrease) in cash, restricted cash and equivalents
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
Cash, restricted cash and equivalents at beginning of period
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
Cash, restricted cash and equivalents at end of period
Supplemental Cash Flow Information
Supplemental Cash Flow Information [Abstract]
Significant noncash investing and financing activities:
Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract]
Accrued capital expenditures
Capital Expenditures Incurred But Not Yet Paid
Net realized and unrealized changes related to derivative activities
Increase Decrease In Commodity Contract Assets And Liabilities
Total equity
Members Equity
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations
Nature Of Operations
Accounting Policies [Abstract]
Significant Accounting Policies
Significant Accounting Policies [Text Block]
Mergers, acquisitions and dispositions including property plant and equipment sales disclosures.
Text Block [Abstract]
Acquisitions and Dispositions
Mergers Acquisitions And Dispositions Including Property Plant And Equipment Sales Disclosures [Text Block]
Operating Revenue Disclosure [Text Block]
Operating Revenue
Operating Revenue Disclosure [Text Block]
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Earnings Per Share [Abstract]
Earnings Per Share
Earnings Per Share [Text Block]
Equity [Abstract]
Accumulated Other Comprehensive Income
Stockholders Equity Note Disclosure [Text Block]
Fair Value Disclosures [Abstract]
Fair Value Measurements
Fair Value Disclosures [Text Block]
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedge Accounting Activities
Derivative Instruments And Hedging Activities Disclosure [Text Block]
Investments, Debt and Equity Securities [Abstract]
Investments
Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block]
Property Plant And Equipment [Abstract]
Property Plant and Equipment
Property Plant And Equipment Disclosure [Text Block]
Regulated Operations [Abstract]
Regulatory Assets and Liabilities
Schedule Of Regulatory Assets And Liabilities [Text Block]
Regulatory Matters
Public Utilities Disclosure [Text Block]
Leases [Abstract]
Leases
Leases Of Lessee Disclosure [Text Block]
Variable Interest Entities
Variable Interest Entity Disclosure [Text Block]
Debt Disclosure [Abstract]
Significant Financing Transactions
Debt Disclosure [Text Block]
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies
Commitments And Contingencies Disclosure [Text Block]
Risks and Uncertainties [Abstract]
Credit Risk
Concentration Risk Disclosure [Text Block]
Related Party Transactions [Abstract]
Related-Party Transactions
Related Party Transactions Disclosure [Text Block]
Retirement Benefits [Abstract]
Employee Benefit Plans
Pension And Other Postretirement Benefits Disclosure [Text Block]
Segment Reporting [Abstract]
Operating Segments
Segment Reporting Disclosure [Text Block]
Basis of Accounting
Basis Of Accounting Policy Policy [Text Block]
Estimates
Use Of Estimates
Consolidation
Consolidation Policy [Text Block]
Consolidation, consolidated entities and noncontrolling interest
Consolidation Subsidiaries Or Other Investments Consolidated Entities Policy
Reclassifications
Prior Period Reclassification Adjustment Description
Cash, Restricted Cash and Equivalents
Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy
Property, Plant and Equipment
Property Plant And Equipment Policy [Text Block]
Leases
Lessee Leases Policy [Text Block]
New Accounting Standards
New Accounting Pronouncements Policy Policy [Text Block]
Fair Value Measurements
Fair Value Measurement Policy Policy [Text Block]
Regulatory Matters Involving Potential Loss Contingencies
Public Utilities Policy [Text Block]
Commitments and Contingencies
Commitments And Contingencies Policy [Text Block]
Guarantees, Surety Bonds and Letters of Credit
Minimum Guarantees Policy
Reconciliation of Total Cash, Restricted Cash and Equivalents
Schedule Of Cash And Cash Equivalents Table [Text Block]
Tabular disclosure of purchase price acquisitions.
Business Acquisition
Business Acquisition [Axis]
Business Acquisition, Acquiree
Business Acquisition Acquiree [Domain]
SCANA.
SCANA
S C A N A [Member]
Schedule of Preliminary Allocation of Purchase Price to Assets Acquired and Liabilities Assumed
Schedule Of Acquisition Purchase Price Table [Text Block]
Business Acquisition, Pro Forma Information
Business Acquisition Pro Forma Information [Text Block]
This element contains information about the components of the entity's operating revenue.
Regulated And Unregulated Operating Revenue [Abstract]
Schedule of Operating Revenue
Operating Revenue Table [Text Block]
Schedule of Aggregate Amount of Transaction Price Allocated To Fixed-price Performance Obligations That Unsatisfied At End of Reporting Period And Expected To be Recognized
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Table [Text Block]
Effective Income Tax
Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block]
Earnings Per Share Computation
Schedule Of Earnings Per Share Basic And Diluted Table [Text Block]
Accumulated Other Comprehensive Income Loss [Table]
Accumulated Other Comprehensive Income Loss [Table]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income Loss [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss)
Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block]
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out Of Accumulated Other Comprehensive Income Table [Text Block]
Fair Value Inputs, Assets, Quantitative Information
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques Table [Text Block]
Fair value options qualitative disclosure related to election.
Fair Value, Options, Qualitative Disclosures
Fair Value Options Qualitative Disclosure Related To Election Table [Text Block]
Fair Value, by Balance Sheet Grouping
Fair Value By Balance Sheet Grouping [Text Block]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Input Reconciliation Table [Text Block]
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments
Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments Table [Text Block]
Offsetting Assets
Offsetting Assets Table [Text Block]
Offsetting Liabilities
Offsetting Liabilities Table [Text Block]
Schedule of Volume of Derivative Activity
Schedule Of Notional Amounts Of Outstanding Derivative Positions Table [Text Block]
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)
Schedule Of Cash Flow Hedges Included In Accumulated Other Comprehensive Income Loss Table [Text Block]
Schedule of Amounts Recorded on Balance Sheet Related to Cumulative Basis Adjustments for Fair Value Hedges
Schedule Of Fair Value Hedging Instruments Statements Of Financial Performance And Financial Position Location Table [Text Block]
Fair Value of Derivatives
Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block]
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location
Schedule Of Cash Flow Hedging Instruments Statements Of Financial Performance And Financial Position Location Table [Text Block]
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance
Schedule Of Other Derivatives Not Designated As Hedging Instruments Statements Of Financial Performance And Financial Position Location Table [Text Block]
Investments Debt And Equity Securities [Abstract]
Equity and Fixed Income Securities, Insurance Contracts and Cash Equivalents in Decommissioning Trust Funds
Trading Securities And Certain Trading Assets [Text Block]
Unrealized Gain Loss on Equity
Unrealized Gain Loss On Investments Table [Text Block]
Investments Classified by Contractual Maturity Date
Investments Classified By Contractual Maturity Date Table [Text Block]
Equity And Debt Securities Held In Nuclear Decommissioning Trust Funds [Table Text Block]
Marketable Securities
Equity And Debt Securities Held In Nuclear Decommissioning Trust Funds Table [Text Block]
Schedule of Regulatory Assets
Schedule Of Regulatory Assets [Text Block]
Schedule of Regulatory Liabilities
Schedule Of Regulatory Liabilities [Text Block]
Significant virginia power electric transmission projects approved or applied.
Summary of Additional Virginia Power Electric Transmission Projects Approved or Applied
Significant Virginia Power Electric Transmission Projects Approved O R Applied Table [Text Block]
Schedule of lease assets and liabilities recorded in consolidated balance sheets.
Lease Assets and Liabilities Recorded in Consolidated Balance Sheets
Schedule Of Lease Assets And Liabilities Recorded In Consolidated Balance Sheets Table [Text Block]
Summary of Total Lease Cost
Lease Cost Table [Text Block]
Summary of cash paid for amounts included in measurement of lease liabilities in consolidated statements of cash flows.
Cash Paid for Amounts Included in Measurement of Lease Liabilities
Summary Of Cash Paid For Amounts Included In Measurement Of Lease Liabilities In Consolidated Statements Of Cash Flows Table [Text Block]
Summary of weighted average remaining lease term and discount rate for operating and finance leases.
Weighted Average Remaining Lease Term and Weighted Discounted Rate for Finance and Operating Leases
Summary Of Weighted Average Remaining Lease Term And Discount Rate For Operating And Finance Leases Table [Text Block]
Schedule of maturity analysis of operating and finance lease liabilities.
Scheduled Maturities of Lease Liabilities
Schedule Of Maturity Analysis Of Operating And Finance Lease Liabilities Table [Text Block]
Debt Instrument [Table]
Debt Instrument [Table]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Schedule of Line of Credit Facilities
Schedule Of Line Of Credit Facilities [Text Block]
Schedule Of Subsidiary Guarantees
Schedule Of Guarantee Obligations [Text Block]
Schedule of Related Party Transactions
Schedule Of Related Party Transactions Table [Text Block]
Schedule of related party transactions and other affiliates and related parties.
Schedule of Related Party Transactions
Schedule Of Related Party Transactions And Other Affiliates And Related Parties Table [Text Block]
Compensation And Retirement Disclosure [Abstract]
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Table]
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Table]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost (Credit)
Schedule Of Net Benefit Costs Table [Text Block]
Segment reporting disclosure other information.
Schedule Of Segment Reporting Information By Segment [Table]
Schedule Of Segment Reporting Information By Segment [Table]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Segment Reporting Disclosure Other Information
Segment Reporting Disclosure Other Information Table [Text Block]
Schedule of Segment Reporting Information, by Segment
Schedule Of Segment Reporting Information By Segment [Text Block]
[Line Items] for Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Disposal Group Name
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Axis]
Disposal Group Name
Disposal Groups Including Discontinued Operations Name [Domain]
Merchant solar projects.
Merchant Solar Projects
Merchant Solar Projects [Member]
Ownership
Ownership [Axis]
Ownership
Ownership [Domain]
Dominion Energy Midstream Partners, LP.
Dominion Energy Midstream Partners, LP
Dominion Energy Midstream Partners L P [Member]
Terra nova renewable partners.
Terra Nova Renewable Partners
Terra Nova Renewable Partners [Member]
Option Indexed to Issuer's Equity
Option Indexed To Issuers Equity Equity [Axis]
Option Indexed to Issuer's Equity, Type
Option Indexed To Issuers Equity Type [Domain]
Call Option
Call Option [Member]
Class of Stock
Statement Class Of Stock [Axis]
Class of Stock
Class Of Stock [Domain]
Common and subordinated units.
Common and Subordinated Units
Common And Subordinated Units [Member]
Convertible Preferred Units
Convertible Preferred Stock [Member]
Income Statement Location
Income Statement Location [Axis]
Income Statement Location
Income Statement Location [Domain]
Impairment of assets and other charges.
Impairment of Assets and Other Charges
Impairment Of Assets And Other Charges [Member]
Range
Range [Axis]
Range
Range [Member]
Minimum
Minimum [Member]
Maximum [Member]
Maximum [Member]
Significant Accounting Policies [Line Items]
Significant Accounting Policies [Line Items]
Ownership interest percentage of limited partner interests
Limited Liability Company L L C Or Limited Partnership L P Members Or Limited Partners Ownership Interest
Business Acquisition, Percentage of Voting Interests Acquired
Business Acquisition Percentage Of Voting Interests Acquired
Percentage of equity interest sold to noncontrolling interest owners
Minority Interest Ownership Percentage By Noncontrolling Owners
Percentage ownership in total units
Minority Interest Ownership Percentage By Parent
Cash, cash equivalents and restricted cash.
Cash Cash Equivalents And Restricted Cash [Abstract]
Cash, cash equivalents and restricted cash.
Schedule of cash, cash equivalents and restricted cash.
Schedule Of Cash Cash Equivalents And Restricted Cash [Table]
Schedule Of Cash Cash Equivalents And Restricted Cash [Table]
Cash Cash Equivalents And Restricted Cash [Line Items]
Cash Cash Equivalents And Restricted Cash [Line Items]
Restricted cash and equivalents
Restricted Cash And Cash Equivalents At Carrying Value
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows
Asset Impairment Charges After Tax
Capacity of facility of company owned solar distribution generation facilities.
Number of facilities in cold reserve units retired.
Asset impairment charges
Asset impairment charges after tax
Asset Impairment Charges After Tax
MW Capacity
Capacity Of Facility Of Company Owned Solar Distribution Generation Facilities
Number of facilities in cold reserve units retired
Number Of Facilities In Cold Reserve Units Retired
Lease renewal term, operating lease
Lessee Operating Lease Renewal Term
Option to extend, description, operating lease
Lessee Operating Lease Option To Extend
Option to extend, existence, operating lease
Lessee Operating Lease Existence Of Option To Extend
Estimated useful life of finite-lived intangible asset
Finite Lived Intangible Asset Useful Life
Business acquisition equity interests issued or issuable number of shares issued upon merger, ratio.
Business combinations, discontinued operations and disposal groups.
Business Combinations Discontinued Operations And Disposal Groups [Abstract]
Business acquisition and dispositions line items.
Schedule of business acquisition and dispositions.
Schedule Of Business Acquisitions And Dispositions [Table]
Schedule Of Business Acquisitions And Dispositions [Table]
Toshiba Corporation [Member]
Toshiba Corporation
Toshiba Corporation [Member]
Columbia Energy [Member]
Columbia Energy
Columbia Energy [Member]
Business Acquisition And Dispositions [Line Items]
Business Acquisition And Dispositions [Line Items]
Stock issued during period for acquisition, shares
Stock issued during period for acquisition, value
Common stock agreed to be issued, percentage
Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued Upon Merger Ratio
Total outstanding debt
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities
Business combination consideration refund to customers.
Period to provide refund to customer.
Business combination, refund to customers
Business Combination Consideration Refund To Customers
Period to provide refund to customer
Period To Provide Refund To Customer
Cash consideration
Proceeds From Divestiture Of Businesses
Regulatory Liabilities
Regulatory Liabilities
Regulatory liabilities-current
Refund Liability to electric service customers
Customer Refund Liability Noncurrent
Increase Decrease In Operating Deferred Revenue
Reduction in operating revenue
Increase Decrease In Operating Deferred Revenue
Business combination cost related to exclusion from rate recovery
Business combination cost related to exclusion from rate recovery
Business Combination Cost Related To Exclusion From Rate Recovery
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Regulatory Assets
Business combination recognized identifiable assets acquired and liabilities assumed regulatory assets current.
Remaining regulatory asset
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Regulatory Assets
Remaining regulatory asset current
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Regulatory Assets Current
Charitable contributions, Committed Annual Increase
Charitable contributions, Committed period for annual increase
Other Commitment, Fiscal Year Maturity [Abstract]
Other Commitment Fiscal Year Maturity [Abstract]
Charitable contributions, annual committed increase for next five years
Charitable Contributions Committed Annual Increase
Charitable contributions, period committed for annual increase
Charitable Contributions Committed Period For Annual Increase
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Regulatory Liabilities
Schedule Of Business Acquisitions By Acquisition [Table]
Schedule Of Business Acquisitions By Acquisition [Table]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets [Abstract]
Total current assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets
Investments
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Marketable Securities
Property, plant and equipment
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment
Regulatory assets
Other deferred charges and other assets, including intangible assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets
Total Assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets
Total current liabilities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities
Long-term debt
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Long Term Debt
Deferred income taxes
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities Noncurrent
Regulatory liabilities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Regulatory Liabilities
Other deferred credits and other liabilities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Other
Total Liabilities
Total purchase price
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net
Dominion Energy
Dominion Energy
Dominion Energy [Member]
Cash, restricted cash and equivalents
Restricted cash
Restricted Cash
Property, plant and equipment with NND project.
Asset Impairment Charges Net Of Tax
Property, plant and equipment with NND project
Property Plant And Equipment With N N D Project
Asset impairment charges, after tax
Asset Impairment Charges Net Of Tax
Income tax regulatory assets
Deferred Tax Liabilities Regulatory Assets
Business combination, stock based compensation, fair value.
Stock based compensation awards estimated fair value
Business Combination Stock Based Compensation Fair Value
Dominion energy Questar corporation.
Dominion Energy Questar Corporation
Dominion Energy Questar Corporation [Member]
Other operations and maintenance expense.
Other operations and maintenance
Other Operations And Maintenance Expense [Member]
Interest and related charges.
Interest and related charges
Interest And Related Charges [Member]
Increase in operating revenue
Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual
Decrease in net income
Business Combination Pro Forma Information Earnings Or Loss Of Acquiree Since Acquisition Date Actual
Merger and integration related costs
Business Combination Acquisition Related Costs
Operating Revenue
Business Acquisitions Pro Forma Revenue
Net income attributable to Dominion Energy
Business Acquisitions Pro Forma Net Income Loss
Earnings Per Common Share – Basic
Business Acquisition Pro Forma Earnings Per Share Basic
Earnings Per Common Share – Diluted
Business Acquisition Pro Forma Earnings Per Share Diluted
Public Utilities General Disclosures [Abstract]
Public Utilities General Disclosures [Table]
Public Utilities General Disclosures [Table]
Product and Service
Product Or Service [Axis]
Product and Service
Products And Services [Domain]
Regulated Electric Sales
Electricity Us Regulated [Member]
Member stands for non-regulated electric sales.
Nonregulated Electric Sales
Nonregulated Electricity Sales [Member]
Member stands for Regulated gas sales.
Regulated Gas Sales
Regulated Gas Sales [Member]
Member stands for non-regulated gas operations.
Nonregulated Gas Sales
Nonregulated Gas Operations [Member]
Member stands for regulated gas transportation and storage.
Regulated Gas Transporation and Storage
Regulated Gas Transportation And Storage [Member]
Member stands for non-regulated gas transportation and storage.
Nonregulated Gas Transporation and Storage
Nonregulated Gas Transportation And Storage [Member]
Member stands for revenues from other regulated activities.
Other Regulated Revenues
Other Regulated Revenues [Member]
Member stands for revenues from other non-regulated activities.
Other Nonregulated Revenues
Other Nonregulated Revenues [Member]
NGL Production
Natural Gas Production [Member]
Management Service
Management Service [Member]
Contract with Customer, Sales Channel
Contract With Customer Sales Channel [Axis]
Contract with Customer, Sales Channel
Contract With Customer Sales Channel [Domain]
Residential.
Residential
Residential [Member]
Commercial.
Commercial
Commercial [Member]
Industrial.
Industrial
Industrial [Member]
Government and other retail.
Government and Other Retail
Government And Other Retail [Member]
Wholesale.
Wholesale
Wholesale [Member]
Other.
Other
Other [Member]
Regulatory Agency
Regulatory Agency [Axis]
Regulatory Agency
Regulatory Agency [Domain]
Federal Energy Regulatory Commission.
FERC-regulated
Federal Energy Regulatory Commission [Member]
State regulatory.
State-regulated
State Regulatory [Member]
Public Utilities General Disclosures [Line Items]
Public Utilities General Disclosures [Line Items]
Operating revenue from contracts with customers
Revenue From Contract With Customer Including Assessed Tax
Other revenues
Other Operating Revenues Or Adjustment To Other Operating Revenues
Operating revenue
Virginia Power [Member]
Virginia Electric and Power Company
Virginia Power [Member]
NGL Midstream
Natural Gas Midstream [Member]
Member stands for revenue from alternative operations.
Renewable Energy Investment Tax Credits
Alternative Operations [Member]
Product and Service, Other
Product And Service Other [Member]
Operating revenue from contracts with customers
Revenue From Contract With Customer [Abstract]
Revenues from contract with customer.
Revenues from customers with customers.
Revenues From Customers With Customers [Table]
Revenues From Customers With Customers [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date [Axis]
Revenues From Contract With Customer [Line Items]
Revenues From Contract With Customer [Line Items]
Revenue, expected to be recognized on multi-year contracts
Revenue Remaining Performance Obligation
Revenue, expected to be recognized on multi-year contracts, period
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
Contract asset balances
Contract With Customer Asset Net
Contract liability balances
Contract With Customer Liability
Revenue recognized from contract liability balances
Contract With Customer Liability Revenue Recognized
Effective income tax rate reconciliation deductions for reversal of excess deferred income taxes.
Effective income tax rate reconciliation write-off of regulatory assets.
Effective income tax computation.
Disclosure of information about effective income tax computation.
Effective Income Tax Computation [Table]
Effective Income Tax Computation [Table]
Effective Income Tax Computation [Line Items]
Effective Income Tax Computation [Line Items]
U.S. statutory rate
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
Increases (reductions) resulting from:
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
State taxes, net of federal benefit
Effective Income Tax Rate Reconciliation State And Local Income Taxes
Investment tax credits
Effective Income Tax Rate Reconciliation Tax Credits Investment
Production tax credits
Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities
Reversal of excess deferred income taxes
Effective Income Tax Rate Reconciliation Deductions For Reversal Of Excess Deferred Income Taxes
Write-off of regulatory assets
Effective Income Tax Rate Reconciliation Write Off Of Regulatory Assets
Other, net
Effective Income Tax Rate Reconciliation Other Adjustments
Effective tax rate
Effective Income Tax Rate Continuing Operations
Federal statutory income tax rate
Deferred income tax expense
Deferred Income Tax Expense Benefit
Increase in unrecognized tax benefits
Unrecognized Tax Benefits Period Increase Decrease
Increase in goodwill
Goodwill Period Increase Decrease
Unrecognized Tax Benefits,
Unrecognized Tax Benefits Increases Resulting From Acquisition
Effective income tax rate reconciliation deductions interest expense percent.
Percentage of deductibility of interest expense
Effective Income Tax Rate Reconciliation Deductions Interest Expense Percent
Net income (loss) attributable to Dominion Energy
Average shares of common stock outstanding – Basic
Weighted Average Number Of Shares Outstanding Basic
Net effect of dilutive securities
Weighted Average Number Diluted Shares Outstanding Adjustment
Average shares of common stock outstanding – Diluted
Weighted Average Number Of Diluted Shares Outstanding
Earnings Per Common Share – Basic
Earnings Per Common Share – Diluted
Other comprehensive income (loss) net of tax including portion attributable to noncontrolling interest.
Deferred Gains and Losses on Derivatives-Hedging Activities
Accumulated Gain Loss Net Cash Flow Hedge Parent [Member]
Unrealized Gains and Losses on Investment Securities
Accumulated Net Unrealized Investment Gain Loss [Member]
Unrecognized Pension and Other Postretirement Benefit Costs
Accumulated Defined Benefit Plans Adjustment [Member]
Other comprehensive income (loss) from equity method investees.
Other Comprehensive Loss From Equity Method Investee
Other Comprehensive Income Loss From Equity Method Investees [Member]
Accumulated Other Comprehensive Income (Loss)
Beginning balance
Other comprehensive income before reclassifications: gains (losses)
Other Comprehensive Income Loss Before Reclassifications Net Of Tax
Amounts reclassified from AOCI: (gains) losses
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
Net current period other comprehensive income (loss)
Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest
Cumulative-effect of changes in accounting principle
New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification
Less other comprehensive income attributable to noncontrolling interest
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest
Ending balance
Deferred (gains) and losses on derivatives-hedging activities:
Accumulated Gain Loss Cash Flow Hedge Including Noncontrolling Interest [Member]
Unrealized (gains) and losses on investment securities:
Accumulated Net Investment Gain Loss Including Portion Attributable To Noncontrolling Interest [Member]
Amortization of prior-service costs (credits)
Accumulated Defined Benefit Plans Adjustment Net Prior Service Including Portion Attributable To Noncontrolling Interest [Member]
Unrecognized pension and other postretirement benefit costs:
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable To Noncontrolling Interest [Member]
Amortization of actuarial losses
Accumulated Defined Benefit Plans Adjustment Net Gain Loss Including Portion Attributable To Noncontrolling Interest [Member]
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out Of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out Of Accumulated Other Comprehensive Income [Domain]
Amounts Reclassified From AOCI
Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Derivative Instrument
Derivative Instrument Risk [Axis]
Derivative Contract
Derivative Contract Type [Domain]
Commodity contracts
Commodity Contract [Member]
Interest rate contracts
Interest Rate Contract [Member]
Foreign currency
Foreign Exchange Contract [Member]
Operating revenue
Other income
Income from operations before income tax expense
Income (loss) including noncontrolling interests, net of tax
Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
Realized (gain) loss on sale of securities
Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss
Unrecognized pension and other postretirement benefit costs, before tax
Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax
Unrecognized pension and other postretirement benefit costs, income tax expense
Reclassification From Aoci Current Period Tax
Unrecognized pension and other postretirement benefit costs, net of tax
Fair Value Option Quantitative Disclosures [Table]
Fair Value Option Quantitative Disclosures [Table]
Measurement Frequency
Fair Value By Measurement Frequency [Axis]
Fair Value, Measurement Frequency
Fair Value Measurement Frequency [Domain]
Fair Value, Measurements, Recurring
Fair Value Measurements Recurring [Member]
Fair Value Hierarchy and NAV
Fair Value By Fair Value Hierarchy Level [Axis]
Fair Value Hierarchy and NAV
Fair Value Measurements Fair Value Hierarchy [Domain]
Level 3
Fair Value Inputs Level3 [Member]
Valuation Approach and Technique
Valuation Technique [Axis]
Valuation Approach and Technique
Valuation Technique [Domain]
Discounted Cash Flow [Member]
Income Approach Valuation Technique [Member]
Option Model [Member]
Market Approach Valuation Technique [Member]
Petroleum Reserves
Reserve Quantities By Type Of Reserve [Axis]
Type of Reserve
Type Of Reserve [Domain]
Natural Gas
Natural Gas Reserves [Member]
Energy
Energy [Axis]
Energy
Energy [Domain]
Financial Transmission Rights
FTRs [Member]
Financial Transmission Rights [Member]
Commodity
Physical Options [Member]
Commodity Option [Member]
Weighted Average
Weighted Average [Member]
Asset Class
Fair Value By Asset Class [Axis]
Asset Class
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]
Assets
Derivative Financial Instruments Assets [Member]
Liability Class
Fair Value By Liability Class [Axis]
Fair Value by Liability Class
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain]
Derivative Financial Instruments, Liabilities
Derivative Financial Instruments Liabilities [Member]
Measurement Input Type
Measurement Input Type [Axis]
Measurement Input Type
Measurement Input Type [Domain]
Market Price [Member]
Market Price [Member]
Market Price [Member]
Price Volatility [Member]
Price Volatility [Member]
Price Volatility [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Option Quantitative Disclosures [Line Items]
Fair Value of Derivative Assets
Derivative Assets
Total assets
Assets Fair Value Disclosure
Fair Value of Derivative Liabilities
Derivative Liabilities
Total liabilities
Liabilities Fair Value Disclosure
Fair value inputs, offered quotes for commodity contracts.
Fair value assumptions, expected volatility rate for commodity contracts.
Market Price
Fair Value Inputs Offered Quotes For Commodity Contracts
Price volatility (percentage)
Fair Value Assumptions Expected Volatility Rate For Commodity Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
Level 1
Fair Value Inputs Level1 [Member]
Level 2
Fair Value Inputs Level2 [Member]
Interest rate
Investment Type
Investment Type [Axis]
Investments
Investment Type Categorization [Member]
Equity securities:
Equity Securities [Member]
Fixed Income
Fixed Income Securities [Member]
Cash equivalents and other
Cash And Cash Equivalents [Member]
Geographical
Statement Geographical [Axis]
Geographical
Segment Geographical [Domain]
U.S.
UNITED STATES
Financial Instrument
Financial Instrument [Axis]
Financial Instruments
Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain]
Corporate debt instruments
Corporate Debt Securities [Member]
Government debt securities.
Government Securities
Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Asset
Investments
Investments Fair Value Disclosure
Total assets
Derivative Liabilities
Total Liabilities
Assets measured at fair value using NAV
Alternative Investment
Fair value, net derivative asset (liability) measured on recurring basis, unobservable inputs reconciliation, gain (loss) included in regulatory assets and liabilities.
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Total Gains Losses Realized Unrealized [Abstract]
Operating Revenue
Sales [Member]
Electric Fuel and Other Energy Related Purchases
Electric Fuel and Other Energy-Related Purchases
Electric Fuel And Other Energy Related Purchases [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Input Reconciliation Roll Forward
Beginning balance
Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs
Total realized and unrealized gains (losses):
Realized And Unrealized Gains Losses [Abstract]
Included in earnings
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings
Included in other comprehensive income
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss
Included in regulatory assets/liabilities
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Regulatory Assets And Liabilities
Settlements
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements
Purchases
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchases
Transfers out of Level 3
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3
Ending balance
Unrealized gains or losses included in earnings in Level 3 fair value category
Fair Value Measured On Recurring Basis Gain Loss Included In Earnings
Net changes in assets and liabilities measured at fair value on recurring basis
Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Period Increase Decrease
Remarketable Subordinated Notes, Fair Value Disclosure
Fair Value By Balance Sheet Grouping [Table]
Fair Value By Balance Sheet Grouping [Table]
Measurement Basis
Fair Value By Measurement Basis [Axis]
Fair Value Disclosure Item Amounts [Default]
Portion At Fair Value Fair Value Disclosure [Member]
Fair Value Measurement
Fair Value Disclosure Item Amounts [Domain]
Carrying Amount
Carrying Reported Amount Fair Value Disclosure [Member]
Estimate of Fair Value
Estimate Of Fair Value Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, including securities due within one year
Long Term Debt Fair Value
Credit facility borrowings
Line Of Credit Facility Fair Value Of Amount Outstanding
Junior subordinated notes
Fair Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations
Remarketable subordinated notes
Remarketable Subordinated Notes Fair Value Disclosure
Valuation of certain fair value hedges associated with fixed rate debt
Interest Rate Fair Value Hedge Derivative At Fair Value Net
Offsetting Assets [Table]
Offsetting Assets [Table]
Transaction Type
Transaction Type [Axis]
Transaction
Transaction [Domain]
Over-the-counter
Over The Counter [Member]
Exchange
Exchange Traded [Member]
Offsetting Assets [Line Items]
Offsetting Assets [Line Items]
Gross Assets Presented in the Consolidated Balance Sheet
Derivative Fair Value Of Derivative Asset
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments
Derivative Asset Not Offset Policy Election Deduction
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral Received
Derivative Collateral Obligation To Return Cash
Net Amounts
Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election
Derivative assets, not subject to a master netting or similar arrangement
Derivative Asset Not Subject To Master Netting Arrangement
Offsetting Liabilities [Table]
Offsetting Liabilities [Table]
Offsetting Liabilities [Line Items]
Offsetting Liabilities [Line Items]
Gross Liabilities Presented in the Consolidated Balance Sheet
Derivative Fair Value Of Derivative Liability
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments
Derivative Liability Not Offset Policy Election Deduction
Gross Amounts Not Offset in the Consolidated Balance Sheet, Cash Collateral
Derivative Collateral Right To Reclaim Cash
Net Amounts
Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election
Derivative liabilities, not subject to a master netting or similar arrangement
Derivative Liability Not Subject To Master Netting Arrangement
Derivative [Table]
Derivative [Table]
Fixed price - natural gas - current derivative contract.
Fixed Price - Natural Gas - Current Derivative Contract
Fixed Price Natural Gas Current Derivative Contract [Member]
Fixed price - natural gas - non-current derivative contract.
Fixed Price - Natural Gas - Non-current Derivative Contract
Fixed Price Natural Gas Noncurrent Derivative Contract [Member]
Basis - natural gas - current derivative contract.
Basis - Natural Gas - Current Derivative Contract
Basis Natural Gas Current Derivative Contract [Member]
Basis - natural gas - non-current derivative contract.
Basis - Natural Gas - Non-current Derivative Contract
Basis Natural Gas Noncurrent Derivative Contract [Member]
Fixed price - electricity - current derivative contract.
Fixed Price - Electricity - Current Derivative Contract
Fixed Price Electricity Current Derivative Contract [Member]
Fixed price - electricity - non-current derivative contract.
Fixed Price - Electricity - Non-current Derivative Contract
Fixed Price Electricity Noncurrent Derivative Contract [Member]
Financial transmission rights - electricity- current derivative contract.
Financial Transmission Rights - Electricity- Current Derivative Contract
Financial Transmission Rights Electricity Current Derivative Contract [Member]
Financial Transmission Rights - Electricity- Non-current Derivative Contract [Member]
Financial Transmission Rights - Electricity- Non-current Derivative Contract
Financial Transmission Rights Electricity Noncurrent Derivative Contract [Member]
Natural gas liquids - current derivative contract.
NGLs - Current Derivative Contract
Natural Gas Liquids Current Derivative Contract [Member]
Natural gas liquids - non-current derivative contract.
NGLs - Non-current Derivative Contract
Natural Gas Liquids Noncurrent Derivative Contract [Member]
Interest rate - current derivative contract.
Interest Rate - Current Derivative Contract
Interest Rate Current Derivative Contract [Member]
Interest rate non-current derivative contract.
Interest Rate - Non-current Derivative Contract
Interest Rate Noncurrent Derivative Contract [Member]
Foreign Exchange - Current Derivative Contract [Member]
Foreign Exchange - Current Derivative Contract
Foreign Exchange Current Derivative Contract [Member]
Foreign Exchange - Non- Current Derivative Contract [Member]
Foreign Exchange - Non- Current Derivative Contract
Foreign Exchange Non Current Derivative Contract [Member]
Derivative [Line Items]
Derivative [Line Items]
Volume of derivative activity
Derivative Nonmonetary Notional Amount Volume
Volume of electricity
Derivative Nonmonetary Notional Amount Energy Measure
Interest rate / Foreign currency (US Dollars, Euros)
Derivative Notional Amount
Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table]
Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table]
Electricity
Electricity [Member]
Derivative Instruments Gain Loss [Line Items]
Derivative Instruments Gain Loss [Line Items]
AOCI After-Tax
Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax
Accumulated change, net of tax, in accumulated gains and losses from instruments designated and qualifying as the effective portion of cash flow hedges that will be reclassified into earnings during the next 12 months.
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax
Price Risk Cash Flow Hedge Unrealized Gain Loss To Be Reclassified During Next12 Months
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax
Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net
Foreign currency, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax
Foreign Currency Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax
Amount Of Gain Loss Expected To Be Reclassified To Earnings During Next12 Months After Tax
Maximum Term
Maximum Length Of Time Hedged In Cash Flow Hedge1
Derivative Instruments And Hedging Activities Disclosures [Table]
Derivative Instruments And Hedging Activities Disclosures [Table]
Hedging Designation
Hedging Designation [Axis]
Hedging Designation
Hedging Designation [Domain]
Designated as Hedging Instrument
Designated As Hedging Instrument [Member]
Hedging Relationship
Derivative Instruments Gain Loss By Hedging Relationship [Axis]
Hedging Relationship
Hedging Relationship [Domain]
Fair Value Hedging
Fair Value Hedging [Member]
Long-term Debt
Long Term Debt [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Carrying Amount of the Hedged Asset (Liability)
Hedged Liability Fair Value Hedge
Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Assets(Liabilities)
Hedged Liability Fair Value Hedge Cumulative Increase Decrease
Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table]
Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table]
Fair Value - Derivatives not under Hedge Accounting
Nondesignated [Member]
Balance Sheet Location
Balance Sheet Location [Axis]
Balance Sheet Location
Balance Sheet Location [Domain]
Current Assets
Other Current Assets [Member]
Noncurrent Assets
Other Noncurrent Assets [Member]
Current Liabilities
Other Current Liabilities [Member]
Noncurrent Liabilities [Member]
Other Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives Fair Value [Line Items]
Derivative Asset
Derivative Liabilities
The increase (decrease) (net) in instruments designated and qualifying as hedging instruments subject to regulatory treatment.
Cash Flow Hedges
Cash Flow Hedging [Member]
Purchased gas.
Purchased Gas
Purchased Gas [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivatives
Unrealized Gain Loss On Cash Flow Hedging Instruments
Amount of Gain (Loss) Reclassified From AOCI to Income
Derivative Instruments Gain Loss Reclassified From Accumulated O C I Into Income Effective Portion Net
Increase (Decrease) in Derivatives Subject to Regulatory Treatment
Increase Decrease In Derivatives Affecting Regulatory Assets And Liabilities
Derivatives Not Designated as Hedging Instruments
Amount of Gain (Loss) Recognized in Income on Derivatives
Derivative Gain Loss On Derivative Net
Schedule Of Equity Method Investments [Table]
Schedule Of Equity Method Investments [Table]
Debt Security Category
Information By Category Of Debt Security [Axis]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments
Other Than Temporary Impairment Credit Losses Recognized In Earnings Categories Of Investments [Domain]
Trading account asset.
Trading Securities
Trading Account Asset [Member]
Investment, Name
Schedule Of Equity Method Investment Equity Method Investee Name [Axis]
Investment, Name
Equity Method Investee Name [Domain]
Atlantic coast pipeline LLC.
Atlantic Coast Pipeline
Atlantic Coast Pipeline L L C [Member]
Property, Plant and Equipment, Type
Property Plant And Equipment By Type [Axis]
Property, Plant and Equipment, Type
Property Plant And Equipment Type [Domain]
Pipelines
Pipelines [Member]
Jointly Owned Utility Plant
Jointly Owned Utility Plant [Axis]
Jointly Owned Utility Plant
Jointly Owned Utility Plant [Domain]
Jointly Owned Natural Gas Pipeline.
Jointly Owned Natural Gas Pipeline
Jointly Owned Natural Gas Pipeline [Member]
Public Utility
Public Utility [Axis]
Utility Plant
Utility Plant [Domain]
Distribution
Gas Distribution [Member]
Customer
Major Customers [Axis]
Customer
Name Of Major Customer [Domain]
Duke Energy Corporation.
Duke Energy
Duke Energy Corporation [Member]
Southern Company Gas [Member]
Southern Company Gas [Member]
Southern Company Gas [Member]
Dominion Energy Transmission, Inc.
DETI
Dominion Energy Transmission Inc [Member]
Scenario
Statement Scenario [Axis]
Scenario, Unspecified
Scenario Unspecified [Domain]
Scenario Forecast
Scenario Forecast [Member]
Range Of Amounts [Axis]
Range Of Amounts
Range Of Amounts [Axis]
Range Of Amounts [Domain]
Range Of Amounts
Range Of Amounts [Domain]
Previous Minimum [Member]
Previous Minimum
Previous Minimum [Member]
Previous Maximum [Member]
Previous Maximum
Previous Maximum [Member]
Current Minimum [Member]
Current Minimum
Current Minimum [Member]
Current Maximum [Member]
Current Maximum
Current Maximum [Member]
Blue Racer Midstream LLC [Member]
Blue Racer
Blue Racer Midstream Llc [Member]
Partnership Interest
Partnership Interest [Member]
Schedule of Equity Method Investments [Line Items]
Schedule Of Equity Method Investments [Line Items]
Rabbi trust securities
Assets Held In Trust
Investment Holdings [Table]
Investment Holdings [Table]
Related Party
Related Party Transactions By Related Party [Axis]
Related Party
Related Party [Domain]
Common/collective trust funds
Trust For Benefit Of Employees [Member]
Investment
Investment [Axis]
Investment
Investment [Domain]
Insurance Contracts [Member]
Insurance Contracts
Insurance Contracts [Member]
Cash Equivalents and Other Investment [Member]
Cash Equivalents and Other [Member]
Cash Equivalents And Other Investment [Member]
Investment Holdings [Line Items]
Investment Holdings [Line Items]
Equity securities Amortized Cost
Equity Securities Fv Ni Cost
Equity securities Total Unrealized Gains
Equity Securities Fv Ni Unrealized Gain
Equity securities Total Unrealized Losses
Equity Securities Fv Ni Unrealized Loss
Equity securities Recorded Value
Equity Securities Fv Ni
Fixed income securities Amortized Cost, Total
Available For Sale Debt Securities Amortized Cost Basis
Fixed income securities Total Unrealized Gains
Available For Sale Debt Securities Gross Unrealized Gain
Fixed income securities Total Unrealized Losses
Available For Sale Debt Securities Gross Unrealized Loss
Fixed income securities Recorded Value
Available For Sale Securities Debt Securities
Cash equivalents and other carrying value.
Cash equivalents and other fair value.
Cash equivalents and other Amortized Cost
Cash Equivalents And Other Carrying Value
Cash equivalents and other Recorded Value
Cash Equivalents And Other Fair Value
Available for sale securities amortized cost basis and other investments.
Amortized Cost, Total
Available For Sale Securities Amortized Cost Basis And Other Investments
Total Unrealized Gains
Decommissioning Trust Securities Unrealized Gains
Total Unrealized Losses
Decommissioning Trust Securities Unrealized Losses
Recorded Value, Total
This item represents net assets (liabilities) of pending sales (purchases) of investment securities.
Fair value of securities in an unrealized loss position
Debt Securities Available For Sale Unrealized Loss Position
Net assets related to pending sales and purchases of securities
Net Assets Liabilities Of Pending Sales Purchases Of Investment Securities
Equity securities Fv-Ni net gains losses.
Net gains (losses) recognized during the period
Equity Securities Fv Ni Net Gains Losses
Less: Net gains recognized during the period on securities sold during the period
Equity Securities Fv Ni Realized Gain
Unrealized gains (losses) recognized during the period on securities still held at March 31, 2019 and 2018
Equity Securities Fv Ni Unrealized Gain Loss
Schedule Of Held To Maturity Securities [Table]
Schedule Of Held To Maturity Securities [Table]
Schedule of Held-to-maturity Securities [Line Items]
Schedule Of Held To Maturity Securities [Line Items]
Due in one year or less
Available For Sale Securities Debt Maturities Within One Year Fair Value
Due after one year through five years
Available For Sale Securities Debt Maturities After One Through Five Years Fair Value
Due after five years through ten years
Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value
Due after ten years
Available For Sale Securities Debt Maturities After Ten Years Fair Value
Total
Debt and equity securities realized gains.
Debt and equity securities realized losses.
Debt Securities Available For Sale [Table]
Debt Securities Available For Sale [Table]
Schedule of Available-for-sale Securities [Line Items]
Schedule Of Available For Sale Securities [Line Items]
Proceeds from sales
Realized gains
Debt And Equity Securities Realized Gains
Realized losses
Debt And Equity Securities Realized Losses
Ownership interest (percentage)
Jointly Owned Utility Plant Proportionate Ownership Share
Public Utilities, Length of Pipeline
Jointly Owned Utility Plant, Number of Members
Duration of contract.
Length of natural gas pipeline (in miles)
Public Utilities Length Of Pipeline
Number of members
Jointly Owned Utility Plant Number Of Members
Duration of contract
Duration Of Contract
Contributions to equity method affiliates
Revenue
Revenue From Contract With Customer Excluding Assessed Tax
Other receivables
Estimated Project Costs
Estimated Project Costs Increase
Project cost estimates
Estimated Project Costs
Project cost estimates increase
Estimated Project Costs Increase
Additional consideration including interest received from sale of equity method investments.
Additional consideration including interest received in connection with sale
Additional Consideration Including Interest Received From Sale Of Equity Method Investments
Equity in earnings on investments
Distributions received from investment
Equity Method Investment Dividends Or Distributions
Carrying amount of investment that exceeded share of underlying equity
Equity Method Investment Difference Between Carrying Amount And Underlying Equity
Schedule Of Property Plant And Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Solar development project in Virginia.
Solar Development Project in Virginia
Solar Development Project In Virginia [Member]
Subsequent Event Type
Subsequent Event Type [Axis]
Subsequent Event Type
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Two solar development projects.
Two Solar Development Projects
Two Solar Development Projects [Member]
First solar development project.
First Solar Development Project
First Solar Development Project [Member]
Second solar development project.
Second Solar Development Project
Second Solar Development Project [Member]
Marcellus Shale.
Marcellus Shale
Marcellus Shale [Member]
Oil and Gas Properties
Oil And Gas Properties [Member]
Utica and point pleasant shale.
Utica and Point Pleasant Shale
Utica And Point Pleasant Shale [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment [Line Items]
Cost of project
Number of solar development projects acquired.
Number of Projects
Number Of Solar Development Projects Acquired
Oil and gas property, number of natural gas storage fields.
Gas and oil area, developed, net, remaining interest conveyed, percentage.
Gain (loss) on disposition of property plant and equipment, net of tax.
Development rights (number of acres)
Gas And Oil Area Developed Net
Number of natural gas storage fields
Oil And Gas Property Number Of Natural Gas Storage Fields
Gas and oil area developed net remaining interest conveyed percentage
Gas And Oil Area Developed Net Remaining Interest Conveyed Percentage
Amount of consideration
Disposal Group Including Discontinued Operation Consideration
Gain on sale
Gain Loss On Sale Of Property Plant Equipment
After tax gain on sale
Gain Loss On Disposition Of Property Plant And Equipment Net Of Tax
Proceeds from assignment of Shale Development Rights
Proceeds From Sale Of Property Plant And Equipment
Regulatory Assets And Liabilities Disclosure [Abstract]
Schedule Of Regulatory Assets [Table]
Schedule Of Regulatory Assets [Table]
Regulatory Asset
Regulatory Asset [Axis]
Regulatory Asset
Regulatory Asset [Domain]
Deferred cost of fuel used in electric generation
Deferred cost of fuel used in electric generation
Deferred Cost Of Fuel Used In Electric Generation [Member]
Deferred rate adjustment clause costs for Virginia electric utility.
Deferred Rate Adjustment Clause Costs For Virginia Electric Utility
Deferred Rate Adjustment Clause Costs For Virginia Electric Utility [Member]
Deferred nuclear refueling outage costs.
Deferred nuclear refueling outage costs
Deferred Nuclear Refueling Outage Costs [Member]
Unrecovered NND project costs.
Unrecovered NND Project Costs
Unrecovered N N D Project Costs [Member]
Other
Other Regulatory Assets Liabilities [Member]
Unrecognized pension and other postretirement benefit costs
Pension And Other Postretirement Plans Costs [Member]
PJM transmission rates
PJM transmission rates
Pjm Transmission Rates [Member]
Deferred project costs for gas utilities.
Deferred project costs for gas utilities
Deferred Project Costs For Gas Utilities [Member]
AROs and related funding.
AROs and related funding
A R Os And Related Funding [Member]
Interest rate hedges.
Interest rate hedges
Interest Rate Hedges [Member]
Cost of reacquired debt.
Cost of reacquired debt
Cost Of Reacquired Debt [Member]
Ash pond and landfill closure costs.
Ash pond and landfill closure costs
Ash Pond And Landfill Closure Costs [Member]
Loss Contingency Nature
Loss Contingencies By Nature Of Contingency [Axis]
Loss Contingency, Nature
Loss Contingency Nature [Domain]
Cost of reacquired debt
Loss On Reacquired Debt [Member]
DESC.
DESC
D E S C [Member]
Deferred Project Costs
Deferred Project Costs [Member]
Transmission rate design for allocation of costs of service.
Transmission Rate Design For Allocation Of Costs Of Service
Transmission Rate Design For Allocation Of Costs Of Service [Member]
Deferred rate adjustment clause costs
Deferred rate adjustment clause costs
Deferred Rate Adjustment Clause Costs [Member]
Percentage of Income Payment Plan deployed by East Ohio [Member]
PIPP
Percentage Of Income Payment Plan Deployed By East Ohio [Member]
Unrecovered Gas Costs.
Unrecovered gas costs
Unrecovered Gas Costs [Member]
Regulatory Assets [Line Items]
Regulatory Asset [Line Items]
Regulatory assets-current
Regulatory assets-noncurrent
Total regulatory assets
Regulatory Assets
Schedule Of Regulatory Liabilities [Table]
Schedule Of Regulatory Liabilities [Table]
Regulatory Liability
Regulatory Liability [Axis]
Regulatory Liability
Regulatory Liability [Domain]
Provision for future cost of removal and AROs
Asset Retirement Obligation Costs [Member]
Nuclear decommissioning trust
Environmental Restoration Costs [Member]
Monetization of guarantee settlement.
Monetization of guarantee settlement
Monetization Of Guarantee Settlement [Member]
Cost-of-service impact of 2017 Tax Reform Act.
Cost-of-service impact of 2017 Tax Reform Act
Cost Of Service Impact Of2017 Tax Reform Act [Member]
Reserve for refunds and rate credits to electric utility customers
Revenue Subject To Refund [Member]
Income taxes refundable through future rates
Deferred Income Tax Charges [Member]
Overrecovered other postretirement benefit costs.
Overrecovered Other Postretirement Benefit Costs
Overrecovered Other Postretirement Benefit Costs [Member]
Provision for future cost of removal.
Provision For Future Cost Of Removal
Provision For Future Cost Of Removal [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities [Line Items]
Regulatory liabilities-noncurrent
Total regulatory liabilities
Electric service customers over period.
PJM over period.
Write off of regulatory asset.
Write off of regulatory asset net of tax.
Excess deferred taxes adjusted in charge of operating revenue.
Excess deferred taxes adjusted in charge of operating revenue net of tax.
Excess deferred taxes adjusted in charge of operating revenue
Excess Deferred Taxes Adjusted In Charge Of Operating Revenue
Excess deferred taxes adjusted in charge of operating revenue net of tax
Excess Deferred Taxes Adjusted In Charge Of Operating Revenue Net Of Tax
Amortization period for deferred costs
Regulatory Asset Amortization Period
Duration of payment under settlement agreement
Pjm Over Period
Electric service customers over period
Electric Service Customers Over Period
Write off of regulatory asset
Write Off Of Regulatory Asset
Write off of regulatory asset, after tax
Write Off Of Regulatory Asset Net Of Tax
Weighted average useful life
Debt Instrument Term
Repurchase of first mortgage bonds
Repayments Of First Mortgage Bond
Debt issuance costs
Deferred Finance Costs Net
Public Utilities General Disclosures [Line Items]
Regulatory assets past expenditures not earning return
Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided
Period for which expenditures are expected to be recovered
Remaining Recovery Period Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided1
Public utilities interim rate reduction amount.
Estimated annual revenue reduction on one-time customer credit.
Public utilities annual revenue reduction amount.
Annual revenue reduction amount.
Virginia regulation.
Virginia Regulation
Virginia Regulation [Member]
Solar development project.
Solar Development Project
Solar Development Project [Member]
Public Utilities, Regulatory Proceeding
Public Utilities Regulatory Proceeding [Axis]
Public Utilities, Regulatory Proceeding
Public Utilities Regulatory Proceeding [Domain]
Rider US-3
Rider US-3
Rider U S3 [Member]
Consolidation Items
Consolidation Items [Axis]
Consolidation Items
Consolidation Items [Domain]
Operating Segments
Operating Segments [Member]
Fourth phase.
Fourth Phase
Fourth Phase [Member]
Rider U.
Rider U
Rider U [Member]
Project
Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project [Axis]
Project
Project [Member]
Surry Switching Station Transmission Line [Member]
Surry Switching Station Transmission Line
Surry Switching Station Transmission Line [Member]
Transmission Line from Skiffes Creek Switching Station to Wheaton Substation [Member]
Transmission Line from Skiffes Creek Switching Station to Wheaton Substation
Transmission Line From Skiffes Creek Switching Station To Wheaton Substation [Member]
North Carolina regulation.
North Carolina Regulation
North Carolina Regulation [Member]
Annual base fuel revenues.
Annual Base Fuel Revenues
Annual Base Fuel Revenues [Member]
Information pertaining to SCE & G.
SCE&G [Member]
S C E And G [Member]
East Ohio.
East Ohio
East Ohio [Member]
Ohio Regulation.
Ohio Regulation
Ohio Regulation [Member]
Category of Item Purchased
Long Term Purchase Commitment By Category Of Item Purchased [Axis]
Long-term Purchase Commitment, Category of Item Purchased
Long Term Purchase Commitment Category Of Item Purchased [Domain]
Pipeline infrastructure replacement program.
Pipeline Infrastructure Replacement Program
Pipeline Infrastructure Replacement Program [Member]
Automated meter reading program.
Automated Meter Reading Program
Automated Meter Reading Program [Member]
Capital expenditure program
CEP Program
Capital Expenditure Program [Member]
Questar Gas Company provides retail natural gas distribution services in Utah, Wyoming and Idaho.
Questar Gas
Questar Gas Company [Member]
Utah and Wyoming Regulation.
Utah And Wyoming Regulation
Utah And Wyoming Regulation [Member]
Dominion Cove Point LNG, LP.
Cove Point
Dominion Cove Point L N G L P [Member]
Federal Energy Regulatory Commission
Proposed annual revenue reduction amount
Public Utilities Annual Revenue Reduction Amount
Interim rate reduction amount
Public Utilities Interim Rate Reduction Amount
Annual revenue reduction amount
Annual Revenue Reduction Amount
Estimated annual revenue reduction on one-time customer credit
Estimated Annual Revenue Reduction On One Time Customer Credit
Regulatory liabilities one time bill credit amount.
Submitted and approved decrease in base rate revenue
Public Utilities Approved Rate Increase Decrease Amount
Regulatory liabilities one time bill credit amount
Regulatory Liabilities One Time Bill Credit Amount
Return of equity percentage
Public Utilities Requested Return On Equity Percentage
Public Utilities, Requested Rate, Amount
Proposed revenue requirement
Public Utilities Requested Rate Amount
Projected capital investment
Phase In Plan Net Change In Amount Of Costs Deferred For Rate Making Purposes
Public utilities, length of transmission line.
Kilo Volt Line
Length of transmission line (miles)
Public Utilities Length Of Transmission Line
Capacity of transmission line (kV)
Kilo Volt Line
Application date of public utilities transmission.
Approval date of public utilities transmission.
Public utilities, property, plant and equipment, expected cost of construction.
Transmission Line In Alleghany Country Virginia And Covington Virginia [Member]
Partial Rebuild of Overhead Transmission Lines in Alleghany County, Virginia and Covington, Virginia
Transmission Line In Alleghany Country Virginia And Covington Virginia [Member]
Transmission lines between Lanexa and Northern Neck in Virginia.
Rebuild and Operate Between Lanexa and Northern Neck in Virginia
Transmission Lines Between Lanexa And Northern Neck In Virginia [Member]
Transmission Lines Between Glebe Substation and Arlington Country, Virginia and City of Alexandria, Virginia Existing Overhead Line Underground.
Rebuild and Operate Glebe Substation and Relocate and Operate in Arlington County, Virginia and City of Alexandria, Virginia Existing Overhead Line Underground
Transmission Lines Between Glebe Substation And Arlington Country Virginia And City Of Alexandria Virginia Existing Overhead Line Underground [Member]
Transmission Lines Between Valley, Virginia and Mt.Storm, West virginia.
Rebuild and Operate Between Valley, Virginia and Mt. Storm, West Virginia
Transmission Lines Between Valley Virginia And Mt Storm West Virginia [Member]
Application Date
Application Date Of Public Utilities Transmission
Approval Date
Approval Date Of Public Utilities Transmission
Type of Line
Miles of Lines
Cost Estimate (millions)
Public Utilities Property Plant And Equipment Expected Cost Of Construction
Public utilities authorized rate percentage.
Increase (decrease) in revenue requirement
Public Utilities Requested Rate Increase Decrease Amount
Percentage of earned return
Public Utilities Approved Rate Increase Decrease Percentage
Authorized return percentage
Public Utilities Authorized Rate Percentage
Recovery of cost and net lost revenues with incentive.
Recover of cost and net lost revenue with incentive
Recovery Of Cost And Net Lost Revenues With Incentive
Public utilities, percentage replacement of pipeline system.
Percentage replacement of pipeline system
Public Utilities Percentage Replacement Of Pipeline System
Total estimated cost
Public Utilities Property Plant And Equipment Amount Of Construction Work In Process Included In Rate Base
Public utilities, number of customers with updated automated meter reading technology.
Number of customers with automated meter reading technology
Public Utilities Number Of Customers With Updated Automated Meter Reading Technology
Percentage to defer expenses on capital investments.
Percentage to defer expenses on capital investments
Percentage To Defer Expenses On Capital Investments
Liquefied natural gas storage facility liquefaction rate per day.
Number of days to make prudency determination.
LNG storage facility, liquefaction rate per day
Liquefied Natural Gas Storage Facility Liquefaction Rate Per Day
Number of days to make prudency determination
Number Of Days To Make Prudency Determination
Public utilities annual transportation cost rate adjustment approval request to recover amount.
Annual transportation cost rate adjustment, approval amount requested to recover amount
Public Utilities Annual Transportation Cost Rate Adjustment Approval Request To Recover Amount
Operating and finance lease right of use asset.
Operating and finance lease liability.
Lessee, lease, disclosure.
Lessee, lease, disclosure.
Lessee Lease Disclosure [Table]
Lessee Lease Disclosure [Table]
Lessee Lease Disclosure [Line Items]
Lessee Lease Disclosure [Line Items]
Operating lease assets
Finance lease assets
Finance Lease Right Of Use Asset
Total lease assets
Operating And Finance Lease Right Of Use Asset
Operating lease liabilities - current
Operating Lease Liability Current
Finance lease liabilities - current
Finance Lease Liability Current
Total lease liabilities - current
Operating And Finance Lease Liability Current
Operating lease liabilities - noncurrent
Finance lease liabilities - noncurrent
Finance Lease Liability Noncurrent
Total lease liabilities - noncurrent
Operating And Finance Lease Liability Noncurrent
Total lease liabilities
Operating And Finance Lease Liability
Finance lease right of use asset accumulated amortization.
Finance lease assets, accumulated amortization
Finance Lease Right Of Use Asset Accumulated Amortization
Leases.
Schedule of leases.
Schedule Of Leases Disclosure [Table]
Schedule Of Leases Disclosure [Table]
Type of Arrangement and Non-arrangement Transactions
Type Of Arrangement [Axis]
Arrangements and Non-arrangement Transactions
Arrangements And Nonarrangement Transactions [Member]
Power purchase arrangement.
Power Purchase Arrangements
Power Purchase Arrangement [Member]
Lessor [Member]
Lessor
Lessor [Member]
Corporate office
Building [Member]
Lease Arrangement, Type
Lease Arrangement Type [Axis]
Lease Arrangement, Type
Lease Arrangement Type [Domain]
Built to suit lease arrangement with lessor to construct and lease corporate office property.
Agreement with Lessor to Construct and Lease Corporate Office Property
Built To Suit Lease Arrangement With Lessor To Construct And Lease Corporate Office Property [Member]
Leases Disclosure [Line Items]
Leases Disclosure [Line Items]
Property, plant and equipment, net
Accumulated depreciation, depletion and amortization
Finance lease cost:
Finance Lease Cost [Abstract]
Finance lease cost, Amortization
Finance Lease Right Of Use Asset Amortization
Finance lease cost, Interest
Finance Lease Interest Expense
Operating lease cost
Operating Lease Cost
Short-term lease cost
Short Term Lease Cost
Variable lease cost
Variable Lease Cost
Total lease cost
Lease Cost
Operating cash flows for finance leases
Finance Lease Interest Payment On Liability
Operating cash flows for operating leases
Operating Lease Payments
Financing cash flows for finance leases
Finance Lease Principal Payments
Rental revenue
Operating Leases Income Statement Lease Revenue
Depreciation expense
Depreciation
Weighted average remaining lease term - finance leases
Finance Lease Weighted Average Remaining Lease Term1
Weighted average remaining lease term - operating leases
Operating Lease Weighted Average Remaining Lease Term1
Weighted average discount rate - finance leases
Finance Lease Weighted Average Discount Rate Percent
Weighted average discount rate - operating leases
Operating Lease Weighted Average Discount Rate Percent
Maturity of Operating Lease Liabilities
Operating Lease Liabilities Payments Due [Abstract]
Maturity of Lease Liabilities, Operating, 2019
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
Maturity of Lease Liabilities, Operating, 2020
Lessee Operating Lease Liability Payments Due Year Two
Maturity of Lease Liabilities, Operating, 2021
Lessee Operating Lease Liability Payments Due Year Three
Maturity of Lease Liabilities, Operating, 2022
Lessee Operating Lease Liability Payments Due Year Four
Maturity of Lease Liabilities, Operating, 2023
Lessee Operating Lease Liability Payments Due Year Five
Maturity of Lease Liabilities, Operating, After 2023
Lessee Operating Lease Liability Payments Due After Year Five
Maturity of Lease Liabilities, Operating, Total undiscounted lease payments
Lessee Operating Lease Liability Payments Due
Present value adjustment, Operating
Lessee Operating Lease Liability Undiscounted Excess Amount
Present value of lease liabilities, Operating
Operating Lease Liability
Maturity of Finance Lease Liabilities
Finance Lease Liabilities Payments Due [Abstract]
Maturity of Lease Liabilities, Finance, 2019
Finance Lease Liability Payments Remainder Of Fiscal Year
Maturity of Lease Liabilities, Finance, 2020
Finance Lease Liability Payments Due Year Two
Maturity of Lease Liabilities, Finance, 2021
Finance Lease Liability Payments Due Year Three
Maturity of Lease Liabilities, Finance, 2022
Finance Lease Liability Payments Due Year Four
Maturity of Lease Liabilities, Finance, 2023
Finance Lease Liability Payments Due Year Five
Maturity of Lease Liabilities, Finance, After 2023
Finance Lease Liability Payments Due After Year Five
Maturity of Lease Liabilities, Finance, Total undiscounted lease payments
Finance Lease Liability Payments Due
Present value adjustment, Finance
Finance Lease Liability Undiscounted Excess Amount
Present value of lease liabilities, Finance
Finance Lease Liability
Built to suit lease arrangement, indemnification agreements, maximum percentage payment of funded amount in event of default.
Built to suit lease arrangement, indemnification agreements, maximum percentage payment of funded amount in full recourse events.
Built to suit lease arrangement indemnification agreements maximum percentage payment of differential between project costs and sales proceeds.
Amount of financing commitments to fund estimated project costs
Contractual Obligation
Requested cash draws from lessor to fund project costs
Proceeds From Construction Loans Payable
Required percentage payment of funded amount under certain events of default
Built To Suit Lease Arrangement Indemnification Agreements Maximum Percentage Payment Of Funded Amount In Event Of Default
Required percentage payment for specific full recourse events
Built To Suit Lease Arrangement Indemnification Agreements Maximum Percentage Payment Of Funded Amount In Full Recourse Events
Option to extend, description, finance lease
Lessee Finance Lease Lease Not Yet Commenced Option To Extend
Lease term
Lessee Finance Lease Lease Not Yet Commenced Term Of Contract1
Extension term of lease
Lessee Finance Lease Lease Not Yet Commenced Renewal Term1
Option to extend, existence, finance lease
Lessee Finance Lease Lease Not Yet Commenced Existence Of Option To Extend
Required percentage payment to lessor for difference between project costs and sales proceeds
Built To Suit Lease Arrangement Indemnification Agreements Maximum Percentage Payment Of Differential Between Project Costs And Sales Proceeds
Schedule Of Variable Interest Entities [Table]
Schedule Of Variable Interest Entities [Table]
Variable Interest Entities
Variable Interest Entities By Classification Of Entity [Axis]
Variable Interest Entity, Classification
Classification Of Variable Interest Entity [Domain]
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity Primary Beneficiary [Member]
SBL Holdco [Member]
SBL Holdco
S B L Holdco [Member]
Variable Interest Entity (VIE) or Potential VIE, Information Unavailability
Variable Interest Entity V I E Or Potential V I E Information Unavailability [Member]
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity Not Primary Beneficiary [Member]
Counterparty Name
Counterparty Name [Axis]
Counterparty Name
Repurchase Agreement Counterparty Name [Domain]
Dominion Energy Services Inc.
DES
Dominion Energy Services Inc [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity [Line Items]
Long term debt
Costs incurred in purchasing electric capacity.
Long Term Capacity Contract Non Utility Generators
This item represents the entity's aggregate generation capacity from long-term power and capacity contracts.
Long term capacity contract non utility generators (generators)
Long Term Capacity Contract Non Utility Generators
Aggregate generation capacity from long-term power and capacity contracts (MW)
Aggregate Generation Capacity From Long Term Power And Capacity Contracts Mw
Remaining purchase commitments
Purchase Commitment Remaining Minimum Amount Committed
Payment for electric capacity
Cost Purchased Electric Capacity
Payment for electric energy
Cost Of Goods And Services Sold
Shared Services Purchased
Shared services purchased
Shared Services Purchased
Line Of Credit Facility [Table]
Line Of Credit Facility [Table]
Line of Credit Facility [Line Items]
Line Of Credit Facility [Line Items]
Facility Limit
Line Of Credit Facility Maximum Borrowing Capacity
Outstanding Commercial Paper
Longterm Commercial Paper Current And Noncurrent
Outstanding Letters of Credit
Letters Of Credit Outstanding Amount
Facility Capacity Available
Line Of Credit Facility Remaining Borrowing Capacity
Credit Facility
Credit Facility [Axis]
Credit Facility
Credit Facility [Domain]
Letter of Credit
Letter Of Credit [Member]
Line of Credit
Line Of Credit [Member]
Facility Limit
Debt Instrument
Debt Instrument [Axis]
Debt Instrument, Name
Debt Instrument Name [Domain]
Credit facility maturing in June two thousand twenty.
Credit Facility, Maturing in June 2020
Credit Facility Maturing In June Two Thousand Twenty [Member]
Dominion Solar Projects Three, Inc.
Dominion Solar Projects III, Inc
Dominion Solar Projects Three Inc [Member]
Credit facilities, maturing in December 2017 with 1 year automatic renewals through 2023.
Credit Facilities, Maturing in December 2017 with 1 year Automatic Renewals through 2023
Credit Facilities Maturing In December2017 With1 Year Automatic Renewals Through2023 [Member]
Credit facilities maturing in May 2018 with 1 year automatic renewals through 2024.
Credit Facilities, Maturing in May 2018 with 1 year Automatic Renewals through 2024
Credit Facilities Maturing In May2018 With1 Year Automatic Renewals Through2024 [Member]
Revolving Credit Facility
Revolving Credit Facility [Member]
Variable Rate Term Loan [Member]
Variable Rate Term Loan
Variable Rate Term Loan [Member]
Long-term Debt, Type
Longterm Debt Type [Axis]
Long-term Debt, Type
Longterm Debt Type [Domain]
Senior Notes
Senior Notes [Member]
Senior notes due in two zero four nine.
Senior Notes, Due in 2049
Senior Notes Due In Two Zero Four Nine [Member]
Senior notes, due in two zero two eight.
Senior Notes, Due in 2028
Senior Notes Due In Two Zero Two Eight [Member]
Special facility revenue bonds due through 2023.
Economic Development Authority of the County of Chesterfield Pollution Control Refunding Revenue Bonds, Series 2009A, due in 2023
Special Facility Revenue Bonds Due Through2023 [Member]
Sale of Stock
Subsidiary Sale Of Stock [Axis]
Sale of Stock
Sale Of Stock Name Of Transaction [Domain]
Shelf registration for sale of common stock through at the market program.
Shelf Registration For Sale Of Common Stock Through At Market Program
Shelf Registration For Sale Of Common Stock Through At Market Program [Member]
Credit facility, outstanding amount
Line Of Credit
Line of credit facility, termination date
Line Of Credit Facility Expiration Date1
Line of credit facility terminated borrowing capacity amount.
Line of credit sub-limit.
Terminated credit facility
Line Of Credit Facility Terminated Borrowing Capacity Amount
Line of credit sub-limit
Line Of Credit Sub Limit
Debt instrument auto renewal term.
Automatic renewal period
Debt Instrument Auto Renewal Term
Repayment of long-term debt
Tender offer expiration description.
Repurchase of medium term notes
Repayments Of Medium Term Notes
Tender offer expiration description
Tender Offer Expiration Description
Debt instrument maturity year.
Total Long-term Debt
Debt Instrument Face Amount
Interest rate percentage
Debt Instrument Interest Rate Stated Percentage
Debt maturity year
Debt Instrument Maturity Year
Debt, amount redeemed
Debt Instrument Repurchased Face Amount
Right to receive conversion of common stock.
Shares of common stock issued in acquisition
Shares of common stock issued in acquisition, value
Right to receive conversion of common stock
Right To Receive Conversion Of Common Stock
Gain or loss recognized in equity transaction
Debt And Equity Securities Realized Gain Loss
Amount of income taxes recognized in equity primarily attributable to establishing additional regulatory liabilities
Cash proceeds received from common stock
Fees and commissions paid
Payments Of Stock Issuance Costs
Issuance of common stock value
Effective term to operate power station units.
Loss Contingencies [Table]
Loss Contingencies [Table]
Unfavorable Regulatory Action
Unfavorable Regulatory Action [Member]
Environmental Remediation Contingency
Environmental Remediation Contingency [Axis]
Environmental Remediation Contingency
Environmental Remediation Contingency [Domain]
Utility mercury and air toxics standard rule.
MATS
Utility Mercury And Air Toxics Standard Rule [Member]
Environmental protection agency.
EPA
Environmental Protection Agency [Member]
Ozone standards.
Ozone Standards
Ozone Standards [Member]
Clean water act.
CWA
Clean Water Act [Member]
Final rule to revise effluent limitations guidelines for steam electric power generating category.
Final Rule to Revise Effluent Limitations Guidelines for Steam Electric Power Generating Category
Final Rule To Revise Effluent Limitations Guidelines For Steam Electric Power Generating Category [Member]
Two thousand fifteen effluent limitations guidelines rule.
2015 Effluent Limitations Guidelines Rule for Steam Electric Power Generating Category
Two Thousand Fifteen Effluent Limitations Guidelines Rule [Member]
Coal tar and other potentially harmful materials.
Coal Tar and Other Potentially Harmful Materials
Coal Tar And Other Potentially Harmful Materials [Member]
Environmental Remediation Site
Environmental Remediation Site [Axis]
Environmental Remediation Site
Environmental Remediation Site [Domain]
Former gas plant site with post closure groundwater monitoring program.
Former Gas Plant Site with Post Closure Groundwater Monitoring Program
Former Gas Plant Site With Post Closure Groundwater Monitoring Program [Member]
Litigation Case
Litigation Case [Axis]
Litigation Case
Litigation Case Type [Domain]
DESC ratepayer case.
DESC Ratepayer Case
D E S C Ratepayer Case [Member]
SOUTH CAROLINA
SOUTH CAROLINA
Income Tax Authority, Name
Income Tax Authority Name [Axis]
Income Tax Authority, Name
Income Tax Authority Name [Domain]
SCDOR [Member]
California Franchise Tax Board [Member]
Environmental protection agency final rule regulating management of coal combustion residual.
Environmental Protection Agency Final Rule Regulating Management of CCRs
Environmental Protection Agency Final Rule Regulating Management Of Coal Combustion Residual [Member]
Coal combustion residual.
CCR
Coal Combustion Residual [Member]
Facilities subject to coal combustion residual final rule.
Facilities Subject to Coal Combustion Residual Final Rule
Facilities Subject To Coal Combustion Residual Final Rule [Member]
Environmental Exit Cost by Property
Environmental Exit Cost By Property [Axis]
Environmental Exit Costs, Name of Property
Environmental Exit Costs Name Of Property [Domain]
Cost of landfills and beneficial reuse.
Cost of Landfills and Beneficial Reuse
Cost Of Landfills And Beneficial Reuse [Member]
Increase in Property, Plant and Equipment [Member]
Increase In Property Plant And Equipment
Increase In Property Plant And Equipment [Member]
Future Ash Pond and Landfill Closure Costs [Member]
Future Ash Pond and Landfill Closure Costs
Future Ash Pond And Landfill Closure Costs [Member]
Litigation Status
Litigation Status [Axis]
Litigation Status
Litigation Status [Domain]
Pending Litigation [Member]
Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Number of effective days to operate power station units
Effective Term To Operate Power Station Units
Standard emission level parts per billon prior to revision.
Revised standard level emission parts per billion.
Number of natural gas fired units to place at facility.
Standard emission level prior to revision
Standard Emission Level Parts Per Billion Prior To Revision
Revised emission standard level
Revised Emission Standard Level Parts Per Billion
Estimated compliance costs
Loss Contingency Estimate Of Possible Loss
Number of natural gas fired units to place at facility
Number Of Natural Gas Fired Units To Place At Facility
Public utilities significant emission rate per year CO2 equivalent.
Significant emission rate per rear CO2 equivalent
Public Utilities Significant Emission Rate Per Year C O2 Equivalent
Loss contingency number of facilities that may be subject to final regulations.
Public utilities electric generating station facilities heightened entrainment analysis.
Public Utilities Electric Generating Station Facilities, Governed Under Rule, Water Withdrawals Levels
Number of mandatory facility-specific factors
Number of optional facility-specific factors.
Electric generating stations with water withdrawals per day
Public Utilities Electric Generating Station Facilities Governed Under Rule Water Withdrawals Levels
Number of mandatory facility-specific factors
Number Of Mandatory Facility Specific Factors
Number of optional facility-specific factors
Number Of Optional Facility Specific Factors
Electric generating station facilities heightened entrainment analysis per day
Public Utilities Electric Generating Station Facilities Heightened Entrainment Analysis
Number of facilities that may be subject to final regulations
Loss Contingency Number Of Facilities That May Be Subject To Final Regulations
Loss contingency number of separate petitions for reconsideration granted.
Loss contingency compliance date
Number of separate petitions for reconsideration granted
Loss Contingency Number Of Separate Petitions For Reconsideration Granted
Compliance date
Loss Contingency Compliance Date
Site contingency number of sites.
Environmental remediation expense, net of tax.
Number of sites where investigations are in progress.
Number of sites with updated remediation work plan.
Increase in environmental remediation expense.
Number of former manufactured gas plant sites.
Number of former manufactured gas plant sites
Number Of Former Manufactured Gas Plant Sites
Number of former sites
Site Contingency Number Of Sites
Environmental Remediation Expense
Environmental Remediation Expense, net of tax
Environmental Remediation Expense Netof Tax
Number of sites under investigation, remediation and monitoring
Number Of Sites Where Investigations Are In Progress
Number of sites with an updated remediation work plan
Number Of Sites With Updated Remediation Work Plan
Updated remediation work plan, cost increase
Increase In Environmental Remediation Expense
Maximum credit amount in future electric rate relief.
Cash Payment For Settlements
Estimated Proceeds From Sale Of Property Plant And Equipment
Escrow account
Escrow Deposit
Credit in future electric rate relief
Maximum Credit Amount In Future Electric Rate Relief
Cash payment
Cash Payment For Settlements
Proceeds from sale of property
Estimated Proceeds From Sale Of Property Plant And Equipment
Proportional share percentage in settlement amount.
Amount claimed by plaintiffs in legal matter
Loss Contingency Damages Sought Value
Proportional share with NND project
Proportional Share Percentage In Settlement Amount
Proposed assessment amount from audit
Income Tax Examination Penalties Expense
Liabilities recorded
Equity method investment, ownership percentage
Equity Method Investment Ownership Percentage
Contesting amount for filed liens.
Contesting amount for filed liens in Fairfield country
Contesting Amount For Filed Liens
Public utilities number of facilities with coal combustion residual.
Number of facilities with CCR
Public Utilities Number Of Facilities With Coal Combustion Residual
Number of petition agreed for reconsideration.
Number of petition agreed for reconsideration
Number Of Petition Agreed For Reconsideration
Public utilities, number of stations with coal combustion residual.
Number of stations
Public Utilities Number Of Stations With Coal Combustion Residual
Legislation requires for coal combustion residual.
Asset retirement obligation liabilities incurred net of tax.
Legislation requires for coal combustion residual
Legislation Requires For Coal Combustion Residual
ARO incurred
Asset Retirement Obligation Liabilities Incurred
ARO incurred, after tax
Asset Retirement Obligation Liabilities Incurred Net Of Tax
Regulatory liability
Guarantee obligations maximum potential loss exposure guarantee limited percentage.
Guarantee obligation.
Schedule Of Guarantee Obligations [Table]
Schedule Of Guarantee Obligations [Table]
Guarantor Obligations, Nature
Guarantee Obligations By Nature [Axis]
Guarantor Obligations, Nature
Guarantee Obligations Nature [Domain]
Financial Guarantee [Member]
Financial Guarantee [Member]
Equity Method Investee [Member]
Equity Method Investee [Member]
Solar [Member]
Solar
Solar [Member]
Other Guarantor Obligations [Member]
Other
Other Guarantor Obligations [Member]
Nuclear Obligations
Nuclear Plant [Member]
Trading Activity
Trading Activity By Type [Axis]
Trading Activity, by Type
Trading Activity By Type [Domain]
Commodity Transactions
Commodity [Member]
Surety Bond [Member]
Surety Bond [Member]
Financial Standby Letter of Credit [Member]
Financial Standby Letter Of Credit [Member]
Guarantee Obligations [Line Items]
Guarantee Obligations [Line Items]
Maximum potential loss exposure, limited guarantee percentage
Guarantee Obligations Maximum Potential Loss Exposure Guarantee Limited Percentage
Guarantee liability
Guarantee Obligation
Guarantee recorded amount
Additional amount borrowed
Proceeds From Lines Of Credit
Maximum Exposure
Guarantee Obligations Maximum Exposure
Number of counterparties.
Concentration risk, credit risk, financial instrument, maximum exposure for single counterparty.
Risks And Uncertainties [Abstract]
Concentration Risk and Guarantor Obligations [Line Items]
Concentration Risk and Guarantor Obligations [Table]
Concentration Risk And Guarantor Obligations [Table]
Concentration Risk And Guarantor Obligations [Table]
Concentration Risk Type
Concentration Risk By Type [Axis]
Concentration Risk Type
Concentration Risk Type [Domain]
Credit Concentration Risk
Credit Concentration Risk [Member]
Internal Credit Assessment
Internal Credit Assessment [Axis]
Internal Credit Assessment
Internal Credit Assessment [Domain]
Internal and external credit rating, investment grade.
Investment Grade
Internal And External Credit Rating Investment Grade [Member]
Wholesale Customers [Member]
Wholesale Customers
Wholesale Customers [Member]
Concentration Risk Benchmark
Concentration Risk By Benchmark [Axis]
Concentration Risk Benchmark
Concentration Risk Benchmark [Domain]
Investment grade counterparty.
Investment Grade Counterparty
Investment Grade Counterparty [Member]
Sales Revenue, Net
Sales Revenue Net [Member]
Concentration Risk and Guarantor Obligations [Line Items]
Concentration Risk And Guarantor Obligations [Line Items]
Gross credit exposure
Concentration Risk Credit Risk Financial Instrument Maximum Exposure
Concentration risk, percentage (percentage)
Concentration Risk Percentage1
Number of counterparties
Number Of Counterparties
Amount of exposure for single counterparty
Concentration Risk Credit Risk Financial Instrument Maximum Exposure For Single Counterparty
Additional collateral to be posted if the credit related contingent features were triggered
Additional Collateral Aggregate Fair Value
Schedule Of Related Party Transactions By Related Party [Table]
Schedule Of Related Party Transactions By Related Party [Table]
Affiliated Entity
Affiliated Entity [Member]
Retirement Plan Type
Retirement Plan Type [Axis]
Retirement Plan Type
Retirement Plan Type [Domain]
Pension Benefits
Pension Plans Defined Benefit [Member]
Medical Coverage for Local retirees
Defined Benefit Postretirement Health Coverage [Member]
Related Party Transaction
Related Party Transaction [Axis]
Related Party Transaction
Related Party Transaction [Domain]
Amounts associated with the Dominion pension plan.
Amounts Associated with the Dominion Pension Plan
Amounts Associated With Dominion Pension Plan [Member]
Amounts associated with the Dominion retiree health and welfare plan.
Amounts Associated with the Dominion Retiree Health and Welfare Plan
Amounts Associated With Dominion Retiree Health And Welfare Plan [Member]
Principal Owner
Principal Owner [Member]
Intercompany revolving credit agreement.
IRCA
Intercompany Revolving Credit Agreement [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Amounts due to Dominion, noncurrent
Due To Affiliate Noncurrent
Amounts due from Dominion, noncurrent
Due From Affiliate Noncurrent
Commodity purchases from affiliates
Related Party Transaction Purchases From Related Party
Services provided by affiliates
Related Party Transaction Expenses From Transactions With Related Party
Services provided to related parties
Revenue From Related Parties
Services provided by affiliates.
Services provided by affiliates
Services Provided By Affiliates [Member]
Capital expenditures
Related Party Outstanding Borrowing For Non Regulated Subsidiaries
Short term demand note
Outstanding borrowings, net of repayments, under money pool for non-regulated subsidiaries
Related Party Outstanding Borrowing For Non Regulated Subsidiaries
Gas Balancing Asset, Current
Other receivables
Due From Other Related Parties
Customer receivables from related parties
Accounts Receivable Related Parties Current
Imbalances receivable from affiliates
Gas Balancing Asset Current
Imbalances payable to affiliates
Gas Imbalance Payable Current
Affiliated notes receivable
Notes Receivable Related Parties
Schedule Of Defined Benefit Plans Disclosures [Table]
Schedule Of Defined Benefit Plans Disclosures [Table]
Other Postretirement Benefits
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Defined Benefit Plan Service Cost
Interest cost
Defined Benefit Plan Interest Cost
Expected return on plan assets
Defined Benefit Plan Expected Return On Plan Assets
Amortization of prior service credit
Defined Benefit Plan Amortization Of Prior Service Cost Credit
Amortization of net actuarial loss
Defined Benefit Plan Amortization Of Gains Losses
Settlements
Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1
Net periodic benefit cost (credit)
Defined Benefit Plan Net Periodic Benefit Cost
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Contributions to defined benefit pension plans and OPEB plans
Pension And Other Postretirement Benefit Contributions
Expected contribution to voluntary employees' beneficiary association for the remainder of 2019
Defined Benefit Plan Expected Future Employer Contributions Remainder Of Fiscal Year
Segments
Statement Business Segments [Axis]
Segments
Segment [Domain]
Corporate and Other
Corporate And Other [Member]
Southeast Energy.
Southeast Energy
Southeast Energy [Member]
Power generation.
Power Generation
Power Generation [Member]
Power delivery.
Power Delivery
Power Delivery [Member]
Virginia legislation.
Virginia Legislation
Virginia Legislation [Member]
After- tax net expenses
Nonoperating Income Expense
Customer refundable fees refund payments after tax.
Asset early retirement obligation expense.
Asset early retirement obligation expense, after tax.
Regulatory assets, net of deferred tax liabilities.
Litigation settlement expense after tax.
Charge for property, plant and equipment acquired but committed to forgo recovery.
Charge for property, plant and equipment acquired but committed to forgo recovery, after tax.
Business combination acquisition related costs after tax.
Charge for refund of amounts from customers
Contract With Customer Refund Liability Current
Charge for refund of amounts from customers, after tax
Customer Refundable Fees Refund Payments After Tax
Asset retirement obligations
Asset Early Retirement Obligation Expense
Asset retirement obligations, after tax
Asset Early Retirement Obligation Expense After Tax
Income tax related to regulatory assets acquired
Income tax related to regulatory assets acquired, after tax
Regulatory Assets Net Of Deferred Tax Liabilities
Litigation settlement expense
Litigation Settlement Expense
Litigation settlement expense, after tax
Litigation Settlement Expense After Tax
Merger and integration-related costs, after tax
Business Combination Acquisition Related Costs After Tax
Charge for property, plant and equipment acquired but committed to forgo recovery
Charge For Property Plant And Equipment Acquired But Committed To Forgo Recovery
Charge for property, plant and equipment acquired but committed to forgo recovery, after tax
Charge For Property Plant And Equipment Acquired But Committed To Forgo Recovery After Tax
Benefit from revision of environmental remediation expense.
Benefit from revision of environmental remediation expense after tax.
Benefit from revision of future closure costs
Benefit From Revision Of Environmental Remediation Expense
Benefit from revision of future closure costs, after tax
Benefit From Revision Of Environmental Remediation Expense After Tax
One time Rate Credits To Customers after tax
One time Rate Credits To Customers
Tax cuts and jobs act of 2017 one time reclass of stranded tax effects resulting from revaluation of DTA due to change in federal tax rate net of tax.
One-time rate credit amount
One Time Rate Credits To Customers
One-time rate credit amount after tax
One Time Rate Credits To Customers After Tax
Charge associated with one-time rate credits of certain amounts to utility customers, after tax
Tax Cuts And Jobs Act Of2017 One Time Reclass Of Stranded Tax Effects Resulting From Revaluation Of D T A Due To Change In Federal Tax Rate Net Of Tax
Gain loss on investments held in nuclear decommissioning trust funds
Other Comprehensive Income Loss Before Tax
Gas infrastructure.
Gas Infrastructure
Gas Infrastructure [Member]
Intersegment revenue
Intersegment Elimination [Member]
Adjustments/Eliminations
Material Reconciling Items [Member]
Eliminations
Consolidation Eliminations [Member]
Operating revenue
Net income (loss)
Storm damage and service restoration charge.
Storm damage and service restoration charge net of tax.
Operating revenue recorded charge.
Operating revenue recorded charge after tax.
Operating revenue recorded charge
Operating Revenue Recorded Charge
Operating revenue recorded charge, after tax
Operating Revenue Recorded Charge After Tax
Charge for storm damage and service restoration
Storm Damage And Service Restoration Charge
Charge for storm damage and service restoration, after tax
Storm Damage And Service Restoration Charge Net Of Tax