| Document and Entity Information | Feb. 04, 2020 |
| Documentand Entity Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 4, 2020 |
| Entity Registrant Name | Dominion Energy, Inc. |
| Entity Central Index Key | 0000715957 |
| Entity Emerging Growth Company | false |
| Entity Incorporation, State or Country Code | VA |
| Entity File Number | 001-08489 |
| Entity Tax Identification Number | 54-1229715 |
| Entity Address, Address Line One | 120 Tredegar Street |
| Entity Address, City or Town | Richmond |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 23219 |
| City Area Code | 804 |
| Local Phone Number | 819-2000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Common Stock | |
| Documentand Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, no par value |
| Trading Symbol | D |
| Security Exchange Name | NYSE |
| 2016 Series A 5.25% Enhanced Junior Subordinated Notes | |
| Documentand Entity Information [Line Items] | |
| Title of 12(b) Security | 2016 Series A 5.25% Enhanced Junior Subordinated Notes |
| Trading Symbol | DRUA |
| Security Exchange Name | NYSE |
| 2019 Series A Corporate Units | |
| Documentand Entity Information [Line Items] | |
| Title of 12(b) Security | 2019 Series A Corporate Units |
| Trading Symbol | DCUE |
| Security Exchange Name | NYSE |
