XML 137 R52.htm IDEA: XBRL DOCUMENT
v3.19.3

Employee Benefit Plans (Tables) | Nov. 18, 2019
--- | ---
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Net Periodic Benefit Cost (Credit) | The components of Dominion Energy’s provision for net periodic benefit cost (credit) were as follows:
|  | Pension Benefits |  |  | Other Postretirement Benefits |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
(millions) |  |  |  |  |  |  |  |  |  |  |  |
Three Months Ended June 30, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 40 |  |  | $ | 40 |  |  | $ | 6 |  |  | $ | 6 |
Interest cost |  |  | 98 |  |  |  | 84 |  |  |  | 17 |  |  |  | 14 |
Expected return on plan assets |  |  | (176 | ) |  |  | (168 | ) |  |  | (35 | ) |  |  | (35 | )
Amortization of prior service cost (credit) |  |  | 1 |  |  |  | 1 |  |  |  | (13 | ) |  |  | (13 | )
Amortization of net actuarial loss |  |  | 43 |  |  |  | 49 |  |  |  | 3 |  |  |  | 2 |
Curtailment (1) |  |  | 71 |  |  |  | — |  |  |  | 42 |  |  |  | — |
Net periodic benefit cost (credit) |  | $ | 77 |  |  | $ | 6 |  |  | $ | 20 |  |  | $ | (26 | )
Six Months Ended June 30, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 80 |  |  | $ | 79 |  |  | $ | 13 |  |  | $ | 13 |
Interest cost |  |  | 199 |  |  |  | 168 |  |  |  | 34 |  |  |  | 28 |
Expected return on plan assets |  |  | (353 | ) |  |  | (333 | ) |  |  | (68 | ) |  |  | (71 | )
Amortization of prior service cost (credit) |  |  | 1 |  |  |  | 1 |  |  |  | (26 | ) |  |  | (26 | )
Amortization of net actuarial loss |  |  | 82 |  |  |  | 97 |  |  |  | 7 |  |  |  | 5 |
Settlements and Curtailment (1) |  |  | 73 |  |  |  | — |  |  |  | 42 |  |  |  | — |
Net periodic benefit cost (credit) |  | $ | 82 |  |  | $ | 12 |  |  | $ | 2 |  |  | $ | (51 | )
(1) | Primarily related to a voluntary retirement program.
Dominion Energy Gas Holdings, LLC |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Net Periodic Benefit Cost (Credit) | The components of Dominion Energy Gas’ provision for net periodic benefit cost (credit) for employees represented by collective bargaining units were as follows:
|  | Pension Benefits |  |  | Other Postretirement Benefits |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
(millions) |  |  |  |  |  |  |  |  |  |  |  |
Three Months Ended June 30, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 4 |  |  | $ | 5 |  |  | $ | 1 |  |  | $ | 1 |
Interest cost |  |  | 8 |  |  |  | 7 |  |  |  | 2 |  |  |  | 2 |
Expected return on plan assets |  |  | (39 | ) |  |  | (38 | ) |  |  | (7 | ) |  |  | (6 | )
Amortization of prior service credit |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | (1 | )
Amortization of net actuarial loss |  |  | 5 |  |  |  | 5 |  |  |  | 1 |  |  |  | 1 |
Curtailment (1) |  |  | 1 |  |  |  | — |  |  |  | 1 |  |  |  | — |
Net periodic benefit credit |  | $ | (21 | ) |  | $ | (21 | ) |  | $ | (3 | ) |  | $ | (3 | )
Six Months Ended June 30, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 8 |  |  | $ | 9 |  |  | $ | 2 |  |  | $ | 2 |
Interest cost |  |  | 16 |  |  |  | 14 |  |  |  | 5 |  |  |  | 5 |
Expected return on plan assets |  |  | (78 | ) |  |  | (75 | ) |  |  | (14 | ) |  |  | (14 | )
Amortization of prior service credit |  |  | — |  |  |  | — |  |  |  | (2 | ) |  |  | (2 | )
Amortization of net actuarial loss |  |  | 10 |  |  |  | 10 |  |  |  | 2 |  |  |  | 2 |
Curtailment (1) |  |  | 1 |  |  |  | — |  |  |  | 1 |  |  |  | — |
Net periodic benefit credit |  | $ | (43 | ) |  | $ | (42 | ) |  | $ | (6 | ) |  | $ | (7) |
(1) | Related to a voluntary retirement program.

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_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=d_DominionEnergyGasHoldingsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |