v3.26.3
Regulatory Assets and Liabilities (Schedule of Regulatory Liabilities) (Detail) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current $ 469 $ 542 [1]
Regulatory liabilities-noncurrent 9,977 9,072 [1]
Total regulatory liabilities 10,446 9,614
Virginia Electric and Power Company    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current 284 374 [2]
Regulatory liabilities-noncurrent 7,389 6,530 [2]
Total regulatory liabilities $ 7,673 6,904
SCANA    
Regulatory Liabilities [Line Items]    
Estimation period of collection to be credited 11 years  
Electric service customers over period 20 years  
Deferred Cost of Fuel Used in Electric Generation    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [3] $ 3 3
Deferred Cost of Fuel Used in Electric Generation | Virginia Electric and Power Company    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [3] 3 3
Provision for Future Cost of Removal and AROs    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [4] 101 101
Regulatory liabilities-noncurrent [4] 1,987 1,950
Provision for Future Cost of Removal and AROs | Virginia Electric and Power Company    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [4] 101 101
Regulatory liabilities-noncurrent [4] 1,370 1,346
Reserve for Rate Credits to Electric Utility Customers    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [5] 21 34
Regulatory liabilities-noncurrent [5] 121 128
Reserve for Rate Credits to Electric Utility Customers | Virginia Electric and Power Company    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [5] 0 0
Regulatory liabilities-noncurrent [5] 0 0
Income Taxes Refundable through Future Rates    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [6] 121 110
Regulatory liabilities-noncurrent [6] 2,735 2,854
Income Taxes Refundable through Future Rates | Virginia Electric and Power Company    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [6] 77 77
Regulatory liabilities-noncurrent [6] 1,963 2,046
Monetization of Guarantee Settlement    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [7] 67 67
Regulatory liabilities-noncurrent [7] $ 451 501
Electric service customers over period 20 years  
Derivatives    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [8] $ 53 158
Regulatory liabilities-noncurrent [8] 302 228
Derivatives | Virginia Electric and Power Company    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current [8] 2 135
Regulatory liabilities-noncurrent [8] 0 31
Other    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current 103 69
Regulatory liabilities-noncurrent 396 247
Other | Virginia Electric and Power Company    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-current 101 58
Regulatory liabilities-noncurrent 301 152
Nuclear Decommissioning Trust    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-noncurrent [9] 2,801 2,494
Nuclear Decommissioning Trust | Virginia Electric and Power Company    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-noncurrent [9] 2,801 2,494
Interest Rate Hedges    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-noncurrent [10] 954 461
Interest Rate Hedges | Virginia Electric and Power Company    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-noncurrent [10] 954 461
Overrecovered Other Postretirement Benefit Costs    
Regulatory Liabilities [Line Items]    
Regulatory liabilities-noncurrent [11] $ 230 $ 209
[1] Dominion Energy’s Consolidated Balance Sheet at December 31, 2025 has been derived from the audited Consolidated Balance Sheet at that date.
[2] Virginia Power’s Consolidated Balance Sheet at December 31, 2025 has been derived from the audited Consolidated Balance Sheet at that date.
[3] 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. In September 2026, the Virginia Commission issued an order permitting Virginia Power to securitize $932 million of under-recovered fuel costs for its Virginia service territory. See Note 12 for additional information.
[4] Rates charged to customers by Dominion Energy and Virginia Power’s regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement.
[5] Reflects amounts previously collected from retail electric customers of DESC for the NND Project to be credited over an estimated 11-year period effective February 2019, in connection with the SCANA Merger Approval Order.
[6] Amounts recorded to pass the effect of reduced income taxes from the 2017 Tax Reform Act to customers in future periods, which will primarily reverse at the weighted-average tax rate that was used to build the reserves over the remaining book life of the property, net of amounts to be recovered through future rates to pay income taxes that become payable when rate revenue is provided to recover AFUDC equity.
[7] Reflects amounts to be refunded to DESC electric service customers over a 20-year period ending in 2039 associated with the monetization of a bankruptcy settlement agreement.
[8] 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.
[9] Primarily reflects a regulatory liability representing amounts collected from Virginia jurisdictional customers and placed in external trusts (including income, losses, changes in fair value and taxes thereon, as applicable) for the future decommissioning of Virginia Power’s utility nuclear generation stations, in excess of the related AROs.
[10] 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 September 30, 2026.
[11] Reflects a regulatory liability for the collection of postretirement benefit costs allowed in rates in excess of expense incurred.