XML 117 R100.htm IDEA: XBRL DOCUMENT v3.19.2

Regulatory Matters - Summary of Additional Significant Riders Associated with Various Virginia Power Projects (Detail) - Virginia Electric and Power Company $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Rider BW
Public Utilities General Disclosures [Line Items]
Application Date	2018-10
Approval Date	July 2019
Rate Year Beginning	2019-09
Total Revenue Requirement (millions)	$ 119
Increase (decrease) in revenue requirement	$ 3
Rider US-2
Public Utilities General Disclosures [Line Items]
Application Date	2018-10
Approval Date	July 2019
Rate Year Beginning	2019-09
Total Revenue Requirement (millions)	$ 15
Increase (decrease) in revenue requirement	$ 2
Rider S
Public Utilities General Disclosures [Line Items]
Application Date	2019-05
Approval Date	Pending
Rate Year Beginning	2020-04
Total Revenue Requirement (millions)	$ 206
Increase (decrease) in revenue requirement	$ (9)
Rider GV
Public Utilities General Disclosures [Line Items]
Application Date	2019-05
Approval Date	Pending
Rate Year Beginning	2020-04
Total Revenue Requirement (millions)	$ 137
Increase (decrease) in revenue requirement	$ 17
Rider W
Public Utilities General Disclosures [Line Items]
Application Date	2019-05
Approval Date	Pending
Rate Year Beginning	2020-04
Total Revenue Requirement (millions)	$ 113
Increase (decrease) in revenue requirement	$ 8
Rider R
Public Utilities General Disclosures [Line Items]
Application Date	2019-05
Approval Date	Pending
Rate Year Beginning	2020-04
Total Revenue Requirement (millions)	$ 49
Increase (decrease) in revenue requirement	$ (8)
Rider B
Public Utilities General Disclosures [Line Items]
Application Date	2019-05
Approval Date	Pending
Rate Year Beginning	2020-04
Total Revenue Requirement (millions)	$ 32
Increase (decrease) in revenue requirement	$ (6)
Rider US-3
Public Utilities General Disclosures [Line Items]
Application Date	2019-07
Approval Date	Pending
Rate Year Beginning	2020-06
Total Revenue Requirement (millions)	$ 31
Increase (decrease) in revenue requirement	$ 21

X

- Definition

Application date of public utilities transmission.

+ References

No definition available.

+ Details

Name:	d_ApplicationDateOfPublicUtilitiesTransmission
Namespace Prefix:	d_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of the approval date of public utilities projects.

+ References

No definition available.

+ Details

Name:	d_ApprovalDateOfPublicUtilitiesProjectsDescription
Namespace Prefix:	d_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Public Utilities, Requested Rate, Amount

+ References

No definition available.

+ Details

Name:	d_PublicUtilitiesRequestedRateAmount
Namespace Prefix:	d_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Public utilities, start date of proposed rate in month and year.

+ References

No definition available.

+ Details

Name:	d_PublicUtilitiesStartDateOfProposedRate
Namespace Prefix:	d_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=d_VirginiaElectricAndPowerCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderBWMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderUS2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderGVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderWMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderRMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=d_RiderUS3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: