v3.25.2
Regulatory Assets and Liabilities (Schedule of Regulatory Assets) (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Regulatory Assets [Line Items]    
Regulatory assets-current [1] $ 1,232 $ 992 [2]
Regulatory assets-noncurrent [1] 8,159 8,288 [2]
Total regulatory assets 9,391 9,280
Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [3] 914 697 [4]
Regulatory assets-noncurrent [3] 4,403 4,537 [4]
Total regulatory assets $ 5,317 5,234
Weighted Average    
Regulatory Assets [Line Items]    
Weighted average useful life 24 years  
Weighted Average | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Weighted average useful life 24 years  
SCANA    
Regulatory Assets [Line Items]    
Electric service customers over period 20 years  
Deferred cost of fuel used in electric generation    
Regulatory Assets [Line Items]    
Regulatory assets-current [5] $ 403 38
Regulatory assets-noncurrent [5] 7 0
Deferred cost of fuel used in electric generation | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [5] 321 3
Regulatory assets-noncurrent [5] 7 0
Securitized cost of fuel used in electric generation    
Regulatory Assets [Line Items]    
Regulatory assets-current [6] 119 124
Regulatory assets-noncurrent [6] 955 1,040
Securitized cost of fuel used in electric generation | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [6] 119 124
Regulatory assets-noncurrent [6] 955 1,040
Deferred rider costs for Virginia electric utility    
Regulatory Assets [Line Items]    
Regulatory assets-current [7] 195 293
Regulatory assets-noncurrent [7] 741 651
Deferred rider costs for Virginia electric utility | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [7] 195 293
Regulatory assets-noncurrent [7] 741 651
Ash pond and landfill closure costs    
Regulatory Assets [Line Items]    
Regulatory assets-current [8] $ 112 108
Regulatory assets expected collection period commencing year 2021  
Ash pond and landfill closure costs | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [8] $ 112 108
Ash pond and landfill closure costs | Minimum    
Regulatory Assets [Line Items]    
Regulatory assets amounts expected collection period 15 years  
Ash pond and landfill closure costs | Maximum    
Regulatory Assets [Line Items]    
Regulatory assets amounts expected collection period 18 years  
Deferred nuclear refueling outage costs    
Regulatory Assets [Line Items]    
Regulatory assets-current [9] $ 63 97
Deferred nuclear refueling outage costs | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [9] 63 80
NND Project Costs    
Regulatory Assets [Line Items]    
Regulatory assets-current [10] 138 138
Regulatory assets-noncurrent [10] 1,742 1,811
CCR Remediation, Ash Pond and Landfill Closure Cost    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [8] 2,916 2,898
CCR Remediation, Ash Pond and Landfill Closure Cost | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [8] 2,569 2,560
Derivatives    
Regulatory Assets [Line Items]    
Regulatory assets-current [11] 27 8
Regulatory assets-noncurrent [11] 35 182
Derivatives | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [11] 25 6
Regulatory assets-noncurrent [11] 1 148
Other    
Regulatory Assets [Line Items]    
Regulatory assets-current 175 186
Regulatory assets-noncurrent 722 666
Other | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current 79 83
Regulatory assets-noncurrent 130 138
Unrecognized Pension and Other Postretirement Benefit Costs    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [12] 483 486
Unrecognized Pension and Other Postretirement Benefit Costs | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [12] 0 0
Interest rate hedges    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [13] 166 167
Interest rate hedges | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [13] 0 0
AROs and related funding    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [14] $ 392 $ 387
Amortization period for deferred costs 105 years  
Deferred Project Costs | Maximum    
Regulatory Assets [Line Items]    
Amortization period for deferred costs 18 months  
[1] See Note 15 for amounts attributable to VIEs.
[2] Dominion Energy’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.
[3] See Note 15 for amounts attributable to VIEs.
[4] Virginia Power’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.
[5] Reflects deferred fuel expenses as well as, beginning in June 2025, deferred electric capacity expenses for the Virginia and North Carolina jurisdictions of Virginia Power’s electric generation operations. Additionally, Dominion Energy includes deferred fuel expenses for the South Carolina jurisdiction of its electric generation operations.
[6] Reflects under-recovered fuel costs for Virginia Power’s Virginia service territory securitized through the issuance of bonds by VPFS in February 2024. See Notes 13 and 18 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2024 for additional information.
[7] Reflects deferrals under Virginia Power’s electric transmission FERC formula rate and the deferral of costs associated with certain current and prospective rider projects.
[8] Primarily reflects legislation in Virginia which requires any CCR asset located at certain Virginia Power stations to be closed by removing the CCR to an approved landfill or through beneficial reuse. These deferred costs are expected to be collected over a period between 15 and 18 years commencing December 2021 through Rider CCR. Virginia Power is entitled to collect carrying costs on uncollected expenditures once expenditures have been made. In addition, the balance reflects amounts related to the EPA’s May 2024 final rule concerning CCR as discussed in Note 14 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2024.
[9] Primarily reflects deferred operation and maintenance costs at Virginia Power incurred in connection with the refueling of any nuclear-powered generating plant as required by Virginia legislation. Virginia Power deferred costs will be amortized over the refueling cycle, not to exceed 18 months.
[10] Reflects expenditures by DESC associated with the NND Project, which pursuant to the SCANA Merger Approval Order, will be recovered from DESC electric service customers over a 20-year period ending in 2039.
[11] Represents changes in the fair value of derivatives, excluding separately presented interest rate hedges, that following settlement are expected to be recovered from or refunded to customers.
[12] Represents unrecognized pension and other postretirement employee benefit costs expected to be recovered or refunded through future rates generally over the expected remaining service period of plan participants by certain of Dominion Energy’s rate-regulated subsidiaries.
[13] Reflects interest rate hedges recoverable from or refundable to customers. Certain of these instruments are settled and any related payments are being amortized into interest expense over the life of the related debt, which has a weighted-average useful life of approximately 24 years for both Dominion Energy and Virginia Power as of June 30, 2025.
[14] Represents uncollected costs, including deferred depreciation and accretion expense, related to legal obligations associated with the future retirement of generation, transmission and distribution properties. The AROs primarily relate to DESC’s electric generating facilities, including Summer, and are expected to be recovered over the related property lives and periods of decommissioning which may range up to approximately 105 years.