v3.26.1
Regulatory Assets and Liabilities (Schedule of Regulatory Assets) (Detail) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Regulatory Assets [Line Items]    
Regulatory assets-current [1] $ 2,125 $ 1,380 [2]
Regulatory assets-noncurrent [1] 8,465 8,276 [2]
Total regulatory assets 10,590 9,656
Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [3] 1,670 1,110 [4]
Regulatory assets-noncurrent [3] 4,583 4,526 [4]
Total regulatory assets 6,253 5,636
Future decommissioning activities $ 10 4
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 23 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] $ 1,209 213
Regulatory assets-noncurrent [5] 153 391
Deferred Cost of Fuel Used in Electric Generation | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [5] 1,015 174
Regulatory assets-noncurrent [5] 153 391
Securitized Cost of Fuel Used in Electric Generation    
Regulatory Assets [Line Items]    
Regulatory assets-current [6] 133 125
Regulatory assets-noncurrent [6] 779 868
Securitized Cost of Fuel Used in Electric Generation | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [6] 133 125
Regulatory assets-noncurrent [6] 779 868
Riders OSW and CE    
Regulatory Assets [Line Items]    
Regulatory assets-current [7] 51 23
Regulatory assets-noncurrent [7] 442 287
Riders OSW and CE | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [7] 51 23
Regulatory assets-noncurrent [7] 442 287
Other Deferred Rider Costs for Virginia Electric Utility    
Regulatory Assets [Line Items]    
Regulatory assets-current [8] 157 445
Regulatory assets-noncurrent [8] 526 338
Other Deferred Rider Costs for Virginia Electric Utility | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [8] 157 445
Regulatory assets-noncurrent [8] 526 338
Ash Pond and Landfill Closure Costs    
Regulatory Assets [Line Items]    
Regulatory assets-current [9] $ 125 164
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 [9] $ 125 164
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 [10] $ 107 101
Deferred Nuclear Refueling Outage Costs | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current [10] 107 101
NND Project Costs    
Regulatory Assets [Line Items]    
Regulatory assets-current [11] 138 138
Regulatory assets-noncurrent [11] 1,603 1,672
CCR Remediation, Ash Pond and Landfill Closure Cost    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [9] 3,093 2,868
CCR Remediation, Ash Pond and Landfill Closure Cost | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [9] 2,530 2,510
Other    
Regulatory Assets [Line Items]    
Regulatory assets-current 205 171
Regulatory assets-noncurrent 797 775
Other | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-current 82 78
Regulatory assets-noncurrent 153 132
Unrecognized Pension and Other Postretirement Benefit Costs    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [12] 510 527
Unrecognized Pension and Other Postretirement Benefit Costs | Virginia Electric and Power Company    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [12]   0
Interest Rate Hedges    
Regulatory Assets [Line Items]    
Regulatory assets-noncurrent [13] 165 165
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] $ 397 $ 385
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 14 for amounts attributable to VIEs.
[2] Dominion Energy’s Consolidated Balance Sheet at December 31, 2025 has been derived from the audited Consolidated Balance Sheet at that date.
[3] See Note 14 for amounts attributable to VIEs.
[4] Virginia Power’s Consolidated Balance Sheet at December 31, 2025 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, which are being amortized into electric fuel and other energy-related purchases. See Note 18 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2025 for additional information.
[7] Deferred balances for Riders OSW and CE include amounts for shortfall or excess in energy sales, capacity revenue, renewable energy credits and production tax credits as such customer benefit amounts are included as a component, including an equity return, of the revenue requirements associated with each rate adjustment clause. In addition, the deferred Rider OSW balance at June 30, 2026 and December 31, 2025 includes $10 million and $4 million, respectively, for future decommissioning activities respectively.
[8] Reflects deferrals under Virginia Power’s electric transmission FERC formula rate and the deferral of costs associated with certain current and prospective rider projects.
[9] 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, 2025.
[10] 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.
[11] 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.
[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 and 23 years for Dominion Energy and Virginia Power, respectively at June 30, 2026.
[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.