| Document and Entity Information | Jul. 03, 2020 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | DOMINION ENERGY, INC |
| Amendment Flag | false |
| Entity Central Index Key | 0000715957 |
| Document Type | 8-K |
| Document Period End Date | Jul. 3, 2020 |
| Entity Incorporation State 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 |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, no par value |
| Trading Symbol | D |
| Security Exchange Name | NYSE |
| Two Thousand And Sixteen Series A Five Point Two Five Percentage Enhanced Junior Subordinated Notes [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 2016 Series A 5.25% Enhanced Junior Subordinated Notes |
| Trading Symbol | DRUA |
| Security Exchange Name | NYSE |
| Two Thousand And Nineteen Series A Corporate Units [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 2019 Series A Corporate Units |
| Trading Symbol | DCUE |
| Security Exchange Name | NYSE |
