XML 138 R84.htm IDEA: XBRL DOCUMENT
v3.25.4

Regulatory Matters (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
Public Utilities, General Disclosures [Line Items] |
Schedule of Regulatory Assets | The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant.
| Duke Energy |  | Progress Energy |  |  |  |  |  |  |  |  |  |  |  |  |  |
| December 31, |  | December 31, |  |  |  |  |  |  |  |  |  |  |  |  |  |
(in millions) | 2025 |  | 2024 |  | 2025 |  | 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – coal ash | $ | 3,670 |  |  | $ | 3,384 |  |  | $ | 1,544 |  |  | $ | 1,335 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued pension and OPEB | 2,281 |  |  | 2,524 |  |  | 744 |  |  | 828 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost deferrals | 73 |  |  | 1,951 |  |  | 49 |  |  | 1,238 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost securitized balance, net | 2,567 |  |  | 1,023 |  |  | 1,239 |  |  | 822 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – nuclear and other | 602 |  |  | 948 |  |  | 564 |  |  | 905 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear asset securitized balance, net | 717 |  |  | 771 |  |  | 717 |  |  | 771 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt fair value adjustment | 665 |  |  | 719 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR regulatory asset | 860 |  |  | 646 |  |  | 746 |  |  | 571 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred fuel and purchased power | 619 |  |  | 588 |  |  | 228 |  |  | 282 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedge costs deferrals | 365 |  |  | 352 |  |  | 135 |  |  | 126 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PISCC and deferred operating expenses | 291 |  |  | 331 |  |  | 37 |  |  | 37 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retired generation facilities | 252 |  |  | 337 |  |  | 176 |  |  | 202 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer connect project | 234 |  |  | 257 |  |  | 107 |  |  | 116 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grid deferral | 257 |  |  | 255 |  |  | 63 |  |  | 54 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Incremental COVID-19 expenses | 202 |  |  | 231 |  |  | 94 |  |  | 89 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vacation accrual | 240 |  |  | 228 |  |  | 45 |  |  | 43 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred asset – Lee and Harris COLA | 177 |  |  | 215 |  |  | 4 |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advanced metering infrastructure (AMI) | 162 |  |  | 204 |  |  | 48 |  |  | 70 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Demand side management (DSM) / Energy efficiency (EE) | 335 |  |  | 199 |  |  | 247 |  |  | 199 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CEP deferral | 200 |  |  | 195 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NCEMPA deferrals | 202 |  |  | 179 |  |  | 202 |  |  | 179 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decoupling | 118 |  |  | 162 |  |  | 27 |  |  | 32 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear deferral | 117 |  |  | 134 |  |  | 53 |  |  | 53 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred pipeline integrity costs | 117 |  |  | 129 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR settlement | 106 |  |  | 110 |  |  | 28 |  |  | 29 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives – natural gas supply contracts | 72 |  |  | 94 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred coal ash handling system costs | 60 |  |  | 77 |  |  | 13 |  |  | 17 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Qualifying facility contract buyouts | 55 |  |  | 62 |  |  | 55 |  |  | 62 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Network Integration Transmission Services deferral | 31 |  |  | 31 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transmission expansion obligation | 30 |  |  | 31 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
East Bend deferrals | 20 |  |  | 24 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Propane caverns | 22 |  |  | 24 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred purchased gas costs | 26 |  |  | 9 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | 568 |  |  | 535 |  |  | 238 |  |  | 195 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory assets | 16,313 |  |  | 16,959 |  |  | 7,403 |  |  | 8,265 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion | 1,934 |  |  | 2,739 |  |  | 753 |  |  | 1,647 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory assets | $ | 14,379 |  |  | $ | 14,220 |  |  | $ | 6,650 |  |  | $ | 6,618 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR regulatory liability | $ | 5,336 |  |  | $ | 5,302 |  |  | $ | 3,084 |  |  | $ | 2,984 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net regulatory liability related to income taxes | 4,748 |  |  | 5,356 |  |  | 1,741 |  |  | 1,882 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – nuclear and other | 2,982 |  |  | 2,289 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred nuclear PTC | 1,377 |  |  | 676 |  |  | 197 |  |  | 95 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedge cost deferrals | 582 |  |  | 583 |  |  | 248 |  |  | 281 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Renewable energy credits | 267 |  |  | 241 |  |  | 146 |  |  | 139 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued pension and OPEB | 184 |  |  | 232 |  |  | 11 |  |  | 12 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred fuel and purchased power | 28 |  |  | 223 |  |  | 28 |  |  | 94 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost recovery | 262 |  |  | 6 |  |  | 90 |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DSM / EE | 26 |  |  | 69 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm reserve | 132 |  |  | — |  |  | 132 |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear insurance distributions reserve | 163 |  |  | 152 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | 866 |  |  | 813 |  |  | 274 |  |  | 287 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory liabilities | 16,953 |  |  | 15,942 |  |  | 5,951 |  |  | 5,780 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion | 1,271 |  |  | 1,421 |  |  | 350 |  |  | 522 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory liabilities | $ | 15,682 |  |  | $ | 14,521 |  |  | $ | 5,601 |  |  | $ | 5,258 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Regulatory Liabilities | The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant.
| Duke Energy |  | Progress Energy |  |  |  |  |  |  |  |  |  |  |  |  |  |
| December 31, |  | December 31, |  |  |  |  |  |  |  |  |  |  |  |  |  |
(in millions) | 2025 |  | 2024 |  | 2025 |  | 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – coal ash | $ | 3,670 |  |  | $ | 3,384 |  |  | $ | 1,544 |  |  | $ | 1,335 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued pension and OPEB | 2,281 |  |  | 2,524 |  |  | 744 |  |  | 828 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost deferrals | 73 |  |  | 1,951 |  |  | 49 |  |  | 1,238 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost securitized balance, net | 2,567 |  |  | 1,023 |  |  | 1,239 |  |  | 822 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – nuclear and other | 602 |  |  | 948 |  |  | 564 |  |  | 905 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear asset securitized balance, net | 717 |  |  | 771 |  |  | 717 |  |  | 771 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt fair value adjustment | 665 |  |  | 719 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR regulatory asset | 860 |  |  | 646 |  |  | 746 |  |  | 571 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred fuel and purchased power | 619 |  |  | 588 |  |  | 228 |  |  | 282 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedge costs deferrals | 365 |  |  | 352 |  |  | 135 |  |  | 126 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PISCC and deferred operating expenses | 291 |  |  | 331 |  |  | 37 |  |  | 37 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retired generation facilities | 252 |  |  | 337 |  |  | 176 |  |  | 202 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer connect project | 234 |  |  | 257 |  |  | 107 |  |  | 116 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grid deferral | 257 |  |  | 255 |  |  | 63 |  |  | 54 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Incremental COVID-19 expenses | 202 |  |  | 231 |  |  | 94 |  |  | 89 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vacation accrual | 240 |  |  | 228 |  |  | 45 |  |  | 43 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred asset – Lee and Harris COLA | 177 |  |  | 215 |  |  | 4 |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advanced metering infrastructure (AMI) | 162 |  |  | 204 |  |  | 48 |  |  | 70 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Demand side management (DSM) / Energy efficiency (EE) | 335 |  |  | 199 |  |  | 247 |  |  | 199 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CEP deferral | 200 |  |  | 195 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NCEMPA deferrals | 202 |  |  | 179 |  |  | 202 |  |  | 179 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decoupling | 118 |  |  | 162 |  |  | 27 |  |  | 32 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear deferral | 117 |  |  | 134 |  |  | 53 |  |  | 53 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred pipeline integrity costs | 117 |  |  | 129 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR settlement | 106 |  |  | 110 |  |  | 28 |  |  | 29 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives – natural gas supply contracts | 72 |  |  | 94 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred coal ash handling system costs | 60 |  |  | 77 |  |  | 13 |  |  | 17 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Qualifying facility contract buyouts | 55 |  |  | 62 |  |  | 55 |  |  | 62 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Network Integration Transmission Services deferral | 31 |  |  | 31 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transmission expansion obligation | 30 |  |  | 31 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
East Bend deferrals | 20 |  |  | 24 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Propane caverns | 22 |  |  | 24 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred purchased gas costs | 26 |  |  | 9 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | 568 |  |  | 535 |  |  | 238 |  |  | 195 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory assets | 16,313 |  |  | 16,959 |  |  | 7,403 |  |  | 8,265 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion | 1,934 |  |  | 2,739 |  |  | 753 |  |  | 1,647 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory assets | $ | 14,379 |  |  | $ | 14,220 |  |  | $ | 6,650 |  |  | $ | 6,618 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR regulatory liability | $ | 5,336 |  |  | $ | 5,302 |  |  | $ | 3,084 |  |  | $ | 2,984 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net regulatory liability related to income taxes | 4,748 |  |  | 5,356 |  |  | 1,741 |  |  | 1,882 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – nuclear and other | 2,982 |  |  | 2,289 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred nuclear PTC | 1,377 |  |  | 676 |  |  | 197 |  |  | 95 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedge cost deferrals | 582 |  |  | 583 |  |  | 248 |  |  | 281 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Renewable energy credits | 267 |  |  | 241 |  |  | 146 |  |  | 139 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued pension and OPEB | 184 |  |  | 232 |  |  | 11 |  |  | 12 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred fuel and purchased power | 28 |  |  | 223 |  |  | 28 |  |  | 94 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost recovery | 262 |  |  | 6 |  |  | 90 |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DSM / EE | 26 |  |  | 69 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm reserve | 132 |  |  | — |  |  | 132 |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear insurance distributions reserve | 163 |  |  | 152 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | 866 |  |  | 813 |  |  | 274 |  |  | 287 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory liabilities | 16,953 |  |  | 15,942 |  |  | 5,951 |  |  | 5,780 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion | 1,271 |  |  | 1,421 |  |  | 350 |  |  | 522 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory liabilities | $ | 15,682 |  |  | $ | 14,521 |  |  | $ | 5,601 |  |  | $ | 5,258 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Potential Plant Retirements |
Total Storm Registration Costs Across Subsidiary Registrants | Winter Storm Fern In late January 2026, Winter Storm Fern moved across the eastern U.S and impacted all of Duke Energy's service territories, with damage primarily occurring in the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 200,000 customers were impacted across Duke Energy's system. Total storm restoration costs, including capital expenditures, for Duke Energy are currently estimated to be in the range of $250 million to $350 million (which includes $150 million to $225 million for Duke Energy Carolinas and $100 million to $125 million for Duke Energy Progress). Incremental storm restoration costs related to operation and maintenance activities in excess of amounts in base rates will be deferred as regulatory assets and reviewed for recovery in future regulatory proceedings or charged to storm reserves, where applicable. These estimates could change as additional information is received on actual costs incurred for preparation and restoration activities. Duke Energy Carolinas and Duke Energy Progress
Duke Energy Carolinas |
Public Utilities, General Disclosures [Line Items] |
Schedule of Regulatory Assets | The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 1,506 |  | $ | 1,481 |  |  | Yes | (b)
Storm cost deferrals | — |  | 691 |  |  | Yes | (b)
Accrued pension and OPEB(c) | 592 |  | 668 |  |  | Yes | (g)
Deferred fuel and purchased power | 306 |  | 298 |  |  | (e) | 2028
Deferred asset – Lee COLA | 173 |  | 205 |  |  |  | (b)
Hedge costs deferrals | 199 |  | 202 |  |  |  | (b)
Storm cost securitized balance, net | 1,328 |  | 201 |  |  |  | 2046
Grid deferral(c) | 194 |  | 201 |  |  | Yes | (b)
Incremental COVID-19 expenses(c) | 104 |  | 137 |  |  | Yes | (b)
AMI(c) | 102 |  | 114 |  |  | Yes | (b)
Vacation accrual | 91 |  | 86 |  |  |  | 2026
Nuclear deferral | 64 |  | 81 |  |  |  | 2027
COR settlement | 78 |  | 81 |  |  | Yes | (b)
Deferred coal ash handling system costs(c) | 47 |  | 60 |  |  | Yes | (b)
Customer connect project(c) | 48 |  | 54 |  |  | Yes | (b)
Retired generation facilities(c) | 56 |  | 110 |  |  | Yes | (b)
DSM/EE | 86 |  | — |  |  | Yes | (h)
PISCC and deferred operating expenses | 39 |  | 42 |  |  | Yes | (b)
Decoupling | 45 |  | 24 |  |  | Yes | (b)
Other | 174 |  | 148 |  |  |  | (b)
Total regulatory assets | 5,232 |  | 4,884 |  |  |  |
Less: Current portion | 730 |  | 685 |  |  |  |
Total noncurrent regulatory assets | $ | 4,502 |  | $ | 4,199 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
AROs – nuclear and other | $ | 2,982 |  | 2,289 |  |  |  | (b)
Net regulatory liability related to income taxes(d) | 1,608 |  | $ | 1,951 |  |  | Yes | (b)
COR regulatory liability(c) | 1,383 |  | 1,479 |  |  |  | (f)
Deferred nuclear PTC | 1,180 |  | 581 |  |  | Yes | (b)
Hedge cost deferrals | 228 |  | 199 |  |  |  | (b)
Deferred fuel and purchased power | — |  | 108 |  |  | (e) |
Renewable energy credits | 121 |  | 102 |  |  | Yes | (b)
Storm cost recovery | 172 |  | — |  |  | Yes | (b)
DSM / EE(c) | — |  | 53 |  |  | Yes | (h)
Accrued pension and OPEB(c) | 18 |  | 35 |  |  | Yes | (g)
Nuclear insurance distributions reserve(c) | 163 |  | 152 |  |  | Yes | (b)
Other | 323 |  | 261 |  |  |  | (b)
Total regulatory liabilities | 8,178 |  | 7,210 |  |  |  |
Less: Current portion | 569 |  | 618 |  |  |  |
Total noncurrent regulatory liabilities | $ | 7,609 |  | $ | 6,592 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate. Portions are included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. The asset balance principally relates to North Carolina costs while the liability balance relates to South Carolina. (f) Recovered over the life of the associated assets. (g) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (h) Includes incentives on DSM/EE investments and is recovered or refunded through an annual rider mechanism.
Schedule of Regulatory Liabilities | The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 1,506 |  | $ | 1,481 |  |  | Yes | (b)
Storm cost deferrals | — |  | 691 |  |  | Yes | (b)
Accrued pension and OPEB(c) | 592 |  | 668 |  |  | Yes | (g)
Deferred fuel and purchased power | 306 |  | 298 |  |  | (e) | 2028
Deferred asset – Lee COLA | 173 |  | 205 |  |  |  | (b)
Hedge costs deferrals | 199 |  | 202 |  |  |  | (b)
Storm cost securitized balance, net | 1,328 |  | 201 |  |  |  | 2046
Grid deferral(c) | 194 |  | 201 |  |  | Yes | (b)
Incremental COVID-19 expenses(c) | 104 |  | 137 |  |  | Yes | (b)
AMI(c) | 102 |  | 114 |  |  | Yes | (b)
Vacation accrual | 91 |  | 86 |  |  |  | 2026
Nuclear deferral | 64 |  | 81 |  |  |  | 2027
COR settlement | 78 |  | 81 |  |  | Yes | (b)
Deferred coal ash handling system costs(c) | 47 |  | 60 |  |  | Yes | (b)
Customer connect project(c) | 48 |  | 54 |  |  | Yes | (b)
Retired generation facilities(c) | 56 |  | 110 |  |  | Yes | (b)
DSM/EE | 86 |  | — |  |  | Yes | (h)
PISCC and deferred operating expenses | 39 |  | 42 |  |  | Yes | (b)
Decoupling | 45 |  | 24 |  |  | Yes | (b)
Other | 174 |  | 148 |  |  |  | (b)
Total regulatory assets | 5,232 |  | 4,884 |  |  |  |
Less: Current portion | 730 |  | 685 |  |  |  |
Total noncurrent regulatory assets | $ | 4,502 |  | $ | 4,199 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
AROs – nuclear and other | $ | 2,982 |  | 2,289 |  |  |  | (b)
Net regulatory liability related to income taxes(d) | 1,608 |  | $ | 1,951 |  |  | Yes | (b)
COR regulatory liability(c) | 1,383 |  | 1,479 |  |  |  | (f)
Deferred nuclear PTC | 1,180 |  | 581 |  |  | Yes | (b)
Hedge cost deferrals | 228 |  | 199 |  |  |  | (b)
Deferred fuel and purchased power | — |  | 108 |  |  | (e) |
Renewable energy credits | 121 |  | 102 |  |  | Yes | (b)
Storm cost recovery | 172 |  | — |  |  | Yes | (b)
DSM / EE(c) | — |  | 53 |  |  | Yes | (h)
Accrued pension and OPEB(c) | 18 |  | 35 |  |  | Yes | (g)
Nuclear insurance distributions reserve(c) | 163 |  | 152 |  |  | Yes | (b)
Other | 323 |  | 261 |  |  |  | (b)
Total regulatory liabilities | 8,178 |  | 7,210 |  |  |  |
Less: Current portion | 569 |  | 618 |  |  |  |
Total noncurrent regulatory liabilities | $ | 7,609 |  | $ | 6,592 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate. Portions are included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. The asset balance principally relates to North Carolina costs while the liability balance relates to South Carolina. (f) Recovered over the life of the associated assets. (g) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (h) Includes incentives on DSM/EE investments and is recovered or refunded through an annual rider mechanism.
Duke Energy Progress |
Public Utilities, General Disclosures [Line Items] |
Schedule of Regulatory Assets | The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 1,531 |  | $ | 1,322 |  |  | Yes | (b)
AROs – nuclear and other | 554 |  | 900 |  |  |  | (c)
Storm cost securitized balance, net | 1,239 |  | 822 |  |  |  | 2046
Accrued pension and OPEB(d) | 396 |  | 439 |  |  | Yes | (i)
Deferred fuel and purchased power | 227 |  | 277 |  |  | (e) | 2028
Storm cost deferrals | 20 |  | 276 |  |  | Yes | (b)
DSM/EE(d) | 229 |  | 188 |  |  | Yes | (g)
NCEMPA deferrals(d) | 202 |  | 179 |  |  | (f) | 2042
Retired generation facilities(d) | 87 |  | 108 |  |  | Yes | (b)
Incremental COVID-19 expenses(d) | 94 |  | 89 |  |  |  | (b)
Hedge costs deferrals | 87 |  | 85 |  |  |  | (b)
AMI(d) | 39 |  | 54 |  |  | Yes | (b)
Grid deferral(d) | 63 |  | 54 |  |  | Yes | (b)
Nuclear deferral | 53 |  | 53 |  |  |  | 2027
Customer connect project(d) | 42 |  | 45 |  |  | Yes | (b)
Vacation accrual | 45 |  | 43 |  |  |  | 2026
PISCC and deferred operating expenses | 37 |  | 37 |  |  | Yes | 2054
Decoupling | 27 |  | 32 |  |  | Yes | (b)
COR settlement | 28 |  | 29 |  |  | Yes | (b)
Deferred coal ash handling system costs(d) | 13 |  | 17 |  |  | Yes | (b)
Deferred asset – Harris COLA | 4 |  | 10 |  |  |  | (b)
Other | 178 |  | 122 |  |  |  | (b)
Total regulatory assets | 5,195 |  | 5,181 |  |  |  |
Less: Current portion | 652 |  | 626 |  |  |  |
Total noncurrent regulatory assets | $ | 4,543 |  | $ | 4,555 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
COR regulatory liability(d) | $ | 3,084 |  | 2,984 |  |  |  | (h)
Net regulatory liability related to income taxes(j) | 1,206 |  | $ | 1,318 |  |  | Yes | (b)
Hedge cost deferrals | 126 |  | 151 |  |  |  | (b)
Renewable energy credits | 146 |  | 139 |  |  | Yes | (b)
Storm cost recovery | 90 |  | 6 |  |  | Yes | (b)
Deferred nuclear PTC | 197 |  | 95 |  |  | Yes | (b)
Accrued pension and OPEB(d) | 11 |  | 12 |  |  | Yes | (i)
Deferred fuel and purchased power | 10 |  | 10 |  |  | (e) | 2028
Other | 211 |  | 203 |  |  |  | (b)
Total regulatory liabilities | 5,081 |  | 4,918 |  |  |  |
Less: Current portion | 274 |  | 348 |  |  |  |
Total noncurrent regulatory liabilities | $ | 4,807 |  | $ | 4,570 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit. (d) Included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. The asset balance principally relates to North Carolina costs while the liability balance relates to South Carolina. (f) South Carolina retail allocated costs are earning a return. (g) Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism. (h) Recovered over the life of the associated assets. (i) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (j) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate. Portions are included in rate base.
Schedule of Regulatory Liabilities | The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 1,531 |  | $ | 1,322 |  |  | Yes | (b)
AROs – nuclear and other | 554 |  | 900 |  |  |  | (c)
Storm cost securitized balance, net | 1,239 |  | 822 |  |  |  | 2046
Accrued pension and OPEB(d) | 396 |  | 439 |  |  | Yes | (i)
Deferred fuel and purchased power | 227 |  | 277 |  |  | (e) | 2028
Storm cost deferrals | 20 |  | 276 |  |  | Yes | (b)
DSM/EE(d) | 229 |  | 188 |  |  | Yes | (g)
NCEMPA deferrals(d) | 202 |  | 179 |  |  | (f) | 2042
Retired generation facilities(d) | 87 |  | 108 |  |  | Yes | (b)
Incremental COVID-19 expenses(d) | 94 |  | 89 |  |  |  | (b)
Hedge costs deferrals | 87 |  | 85 |  |  |  | (b)
AMI(d) | 39 |  | 54 |  |  | Yes | (b)
Grid deferral(d) | 63 |  | 54 |  |  | Yes | (b)
Nuclear deferral | 53 |  | 53 |  |  |  | 2027
Customer connect project(d) | 42 |  | 45 |  |  | Yes | (b)
Vacation accrual | 45 |  | 43 |  |  |  | 2026
PISCC and deferred operating expenses | 37 |  | 37 |  |  | Yes | 2054
Decoupling | 27 |  | 32 |  |  | Yes | (b)
COR settlement | 28 |  | 29 |  |  | Yes | (b)
Deferred coal ash handling system costs(d) | 13 |  | 17 |  |  | Yes | (b)
Deferred asset – Harris COLA | 4 |  | 10 |  |  |  | (b)
Other | 178 |  | 122 |  |  |  | (b)
Total regulatory assets | 5,195 |  | 5,181 |  |  |  |
Less: Current portion | 652 |  | 626 |  |  |  |
Total noncurrent regulatory assets | $ | 4,543 |  | $ | 4,555 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
COR regulatory liability(d) | $ | 3,084 |  | 2,984 |  |  |  | (h)
Net regulatory liability related to income taxes(j) | 1,206 |  | $ | 1,318 |  |  | Yes | (b)
Hedge cost deferrals | 126 |  | 151 |  |  |  | (b)
Renewable energy credits | 146 |  | 139 |  |  | Yes | (b)
Storm cost recovery | 90 |  | 6 |  |  | Yes | (b)
Deferred nuclear PTC | 197 |  | 95 |  |  | Yes | (b)
Accrued pension and OPEB(d) | 11 |  | 12 |  |  | Yes | (i)
Deferred fuel and purchased power | 10 |  | 10 |  |  | (e) | 2028
Other | 211 |  | 203 |  |  |  | (b)
Total regulatory liabilities | 5,081 |  | 4,918 |  |  |  |
Less: Current portion | 274 |  | 348 |  |  |  |
Total noncurrent regulatory liabilities | $ | 4,807 |  | $ | 4,570 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit. (d) Included in rate base. (e) Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. The asset balance principally relates to North Carolina costs while the liability balance relates to South Carolina. (f) South Carolina retail allocated costs are earning a return. (g) Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism. (h) Recovered over the life of the associated assets. (i) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (j) Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate. Portions are included in rate base.
Duke Energy Florida |
Public Utilities, General Disclosures [Line Items] |
Schedule of Regulatory Assets | The following tables present the regulatory assets and liabilities recorded on Duke Energy Florida's Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
Storm cost deferrals | $ | 29 |  | 962 |  |  | (e) | (b)
Nuclear asset securitized balance, net | 717 |  | 771 |  |  |  | 2036
COR regulatory asset | 746 |  | 571 |  |  | Yes | (b)
Accrued pension and OPEB(c) | 348 |  | 389 |  |  | Yes | (f)
Retired generation facilities(c) | 89 |  | 94 |  |  | Yes | 2044
Customer connect project(c) | 65 |  | 71 |  |  | Yes | 2037
Qualifying facility contract buyouts(c) | 55 |  | 62 |  |  | Yes | 2034
Hedge costs deferrals(c) | 48 |  | 41 |  |  | Yes | (b)
AMI(c) | 9 |  | 16 |  |  | Yes | 2032
AROs – coal ash | 13 |  | 13 |  |  |  | (b)
AROs – nuclear and other | 10 |  | 5 |  |  |  | (b)
Other | 79 |  | 91 |  |  | (d) | (b)
Total regulatory assets | 2,208 |  | 3,086 |  |  |  |
Less: Current portion | 102 |  | 1,022 |  |  |  |
Total noncurrent regulatory assets | $ | 2,106 |  | $ | 2,064 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes(c) | $ | 535 |  | $ | 564 |  |  |  | (b)
Hedge cost deferrals(c) | 122 |  | 130 |  |  | Yes | (b)
Deferred fuel and purchased power | 18 |  | 84 |  |  | (e) | 2026
Storm reserve(c) | 132 |  | — |  |  | Yes | (b)
Other | 63 |  | 84 |  |  | (d) | (b)
Total regulatory liabilities | 870 |  | 862 |  |  |  |
Less: Current portion | 76 |  | 174 |  |  |  |
Total noncurrent regulatory liabilities | $ | 794 |  | $ | 688 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Certain costs earn/pay a return. (e) Earns commercial paper rate. (f) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Schedule of Regulatory Liabilities | The following tables present the regulatory assets and liabilities recorded on Duke Energy Florida's Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
Storm cost deferrals | $ | 29 |  | 962 |  |  | (e) | (b)
Nuclear asset securitized balance, net | 717 |  | 771 |  |  |  | 2036
COR regulatory asset | 746 |  | 571 |  |  | Yes | (b)
Accrued pension and OPEB(c) | 348 |  | 389 |  |  | Yes | (f)
Retired generation facilities(c) | 89 |  | 94 |  |  | Yes | 2044
Customer connect project(c) | 65 |  | 71 |  |  | Yes | 2037
Qualifying facility contract buyouts(c) | 55 |  | 62 |  |  | Yes | 2034
Hedge costs deferrals(c) | 48 |  | 41 |  |  | Yes | (b)
AMI(c) | 9 |  | 16 |  |  | Yes | 2032
AROs – coal ash | 13 |  | 13 |  |  |  | (b)
AROs – nuclear and other | 10 |  | 5 |  |  |  | (b)
Other | 79 |  | 91 |  |  | (d) | (b)
Total regulatory assets | 2,208 |  | 3,086 |  |  |  |
Less: Current portion | 102 |  | 1,022 |  |  |  |
Total noncurrent regulatory assets | $ | 2,106 |  | $ | 2,064 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes(c) | $ | 535 |  | $ | 564 |  |  |  | (b)
Hedge cost deferrals(c) | 122 |  | 130 |  |  | Yes | (b)
Deferred fuel and purchased power | 18 |  | 84 |  |  | (e) | 2026
Storm reserve(c) | 132 |  | — |  |  | Yes | (b)
Other | 63 |  | 84 |  |  | (d) | (b)
Total regulatory liabilities | 870 |  | 862 |  |  |  |
Less: Current portion | 76 |  | 174 |  |  |  |
Total noncurrent regulatory liabilities | $ | 794 |  | $ | 688 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Certain costs earn/pay a return. (e) Earns commercial paper rate. (f) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Duke Energy Ohio |
Public Utilities, General Disclosures [Line Items] |
Schedule of Regulatory Assets | The following tables present the regulatory assets and liabilities recorded on Duke Energy Ohio's Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
CEP deferral | $ | 200 |  | 195 |  |  | Yes | (b)
Accrued pension and OPEB | 121 |  | 131 |  |  |  | (d)
COR regulatory asset | 114 |  | 75 |  |  |  | (b)
Customer connect project | 39 |  | 44 |  |  |  | (b)
Network Integration Transmission Services deferral | 31 |  | 31 |  |  | Yes | (b)
Transmission expansion obligation | 30 |  | 31 |  |  |  | (b)
Decoupling | 18 |  | 29 |  |  |  | (b)
Deferred pipeline integrity costs | 26 |  | 28 |  |  | Yes | (b)
East Bend deferrals(c) | 20 |  | 24 |  |  | Yes | (b)
Propane caverns | 22 |  | 24 |  |  |  | (b)
PISCC and deferred operating expenses(c) | 14 |  | 15 |  |  | Yes | 2083
AROs – coal ash | 14 |  | 14 |  |  | Yes | (b)
Deferred fuel and purchased power | 25 |  | 8 |  |  |  | 2026
Other | 98 |  | 144 |  |  |  | (b)
Total regulatory assets | 772 |  | 793 |  |  |  |
Less: Current portion | 86 |  | 88 |  |  |  |
Total noncurrent regulatory assets | $ | 686 |  | $ | 705 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 405 |  | $ | 432 |  |  |  | (b)
Accrued pension and OPEB | 13 |  | 14 |  |  |  | (d)
Other | 109 |  | 53 |  |  |  | (b)
Total regulatory liabilities | 527 |  | 499 |  |  |  |
Less: Current portion | 57 |  | 34 |  |  |  |
Total noncurrent regulatory liabilities | $ | 470 |  | $ | 465 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Schedule of Regulatory Liabilities | The following tables present the regulatory assets and liabilities recorded on Duke Energy Ohio's Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
CEP deferral | $ | 200 |  | 195 |  |  | Yes | (b)
Accrued pension and OPEB | 121 |  | 131 |  |  |  | (d)
COR regulatory asset | 114 |  | 75 |  |  |  | (b)
Customer connect project | 39 |  | 44 |  |  |  | (b)
Network Integration Transmission Services deferral | 31 |  | 31 |  |  | Yes | (b)
Transmission expansion obligation | 30 |  | 31 |  |  |  | (b)
Decoupling | 18 |  | 29 |  |  |  | (b)
Deferred pipeline integrity costs | 26 |  | 28 |  |  | Yes | (b)
East Bend deferrals(c) | 20 |  | 24 |  |  | Yes | (b)
Propane caverns | 22 |  | 24 |  |  |  | (b)
PISCC and deferred operating expenses(c) | 14 |  | 15 |  |  | Yes | 2083
AROs – coal ash | 14 |  | 14 |  |  | Yes | (b)
Deferred fuel and purchased power | 25 |  | 8 |  |  |  | 2026
Other | 98 |  | 144 |  |  |  | (b)
Total regulatory assets | 772 |  | 793 |  |  |  |
Less: Current portion | 86 |  | 88 |  |  |  |
Total noncurrent regulatory assets | $ | 686 |  | $ | 705 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 405 |  | $ | 432 |  |  |  | (b)
Accrued pension and OPEB | 13 |  | 14 |  |  |  | (d)
Other | 109 |  | 53 |  |  |  | (b)
Total regulatory liabilities | 527 |  | 499 |  |  |  |
Less: Current portion | 57 |  | 34 |  |  |  |
Total noncurrent regulatory liabilities | $ | 470 |  | $ | 465 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Duke Energy Indiana |
Public Utilities, General Disclosures [Line Items] |
Schedule of Regulatory Assets | The following tables present the regulatory assets and liabilities recorded on Duke Energy Indiana's Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 606 |  | $ | 554 |  |  | Yes | (b)
PISCC and deferred operating expenses(c) | 201 |  | 237 |  |  | Yes | (b)
Accrued pension and OPEB | 203 |  | 212 |  |  |  | (e)
Retired generation facilities(c) | 20 |  | 25 |  |  | Yes | 2030
Hedge costs deferrals | 30 |  | 23 |  |  |  | (b)
Customer connect project | 18 |  | 19 |  |  |  | (b)
Deferred fuel and purchased power | 60 |  | — |  |  |  | 2026
Storm cost deferrals | 21 |  | 17 |  |  |  | (b)
AMI | 10 |  | 12 |  |  |  | 2031
Other | 56 |  | 54 |  |  |  | (b)
Total regulatory assets | 1,225 |  | 1,153 |  |  |  |
Less: Current portion | 193 |  | 113 |  |  |  |
Total noncurrent regulatory assets | $ | 1,032 |  | $ | 1,040 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 641 |  | $ | 725 |  |  |  | (b)
COR regulatory liability(c) | 444 |  | 434 |  |  |  | (d)
Accrued pension and OPEB | 113 |  | 139 |  |  |  | (e)
Hedge cost deferrals | 106 |  | 103 |  |  |  | (b)
Deferred fuel and purchased power | — |  | 21 |  |  |  |
DSM / EE | 19 |  | 11 |  |  |  | (b)
Other | 137 |  | 154 |  |  |  | (b)
Total regulatory liabilities | 1,460 |  | 1,587 |  |  |  |
Less: Current portion | 275 |  | 183 |  |  |  |
Total noncurrent regulatory liabilities | $ | 1,185 |  | $ | 1,404 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Refunded over the life of the associated assets. (e) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Schedule of Regulatory Liabilities | The following tables present the regulatory assets and liabilities recorded on Duke Energy Indiana's Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 606 |  | $ | 554 |  |  | Yes | (b)
PISCC and deferred operating expenses(c) | 201 |  | 237 |  |  | Yes | (b)
Accrued pension and OPEB | 203 |  | 212 |  |  |  | (e)
Retired generation facilities(c) | 20 |  | 25 |  |  | Yes | 2030
Hedge costs deferrals | 30 |  | 23 |  |  |  | (b)
Customer connect project | 18 |  | 19 |  |  |  | (b)
Deferred fuel and purchased power | 60 |  | — |  |  |  | 2026
Storm cost deferrals | 21 |  | 17 |  |  |  | (b)
AMI | 10 |  | 12 |  |  |  | 2031
Other | 56 |  | 54 |  |  |  | (b)
Total regulatory assets | 1,225 |  | 1,153 |  |  |  |
Less: Current portion | 193 |  | 113 |  |  |  |
Total noncurrent regulatory assets | $ | 1,032 |  | $ | 1,040 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 641 |  | $ | 725 |  |  |  | (b)
COR regulatory liability(c) | 444 |  | 434 |  |  |  | (d)
Accrued pension and OPEB | 113 |  | 139 |  |  |  | (e)
Hedge cost deferrals | 106 |  | 103 |  |  |  | (b)
Deferred fuel and purchased power | — |  | 21 |  |  |  |
DSM / EE | 19 |  | 11 |  |  |  | (b)
Other | 137 |  | 154 |  |  |  | (b)
Total regulatory liabilities | 1,460 |  | 1,587 |  |  |  |
Less: Current portion | 275 |  | 183 |  |  |  |
Total noncurrent regulatory liabilities | $ | 1,185 |  | $ | 1,404 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Refunded over the life of the associated assets. (e) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Piedmont |
Public Utilities, General Disclosures [Line Items] |
Schedule of Regulatory Assets | The following tables present the regulatory assets and liabilities recorded on Piedmont's Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
Accrued pension and OPEB(c) | $ | 131 |  | $ | 144 |  |  |  | (g)
Deferred pipeline integrity costs(c) | 91 |  | 101 |  |  |  | 2034
Derivatives – natural gas supply contracts(f) | 72 |  | 94 |  |  |  | 2031
Decoupling | 28 |  | 77 |  |  | Yes | (b)
Pipeline Integrity Management – Transmission/Distribution | 27 |  | 14 |  |  |  | (b)
Deferred purchased gas costs | 26 |  | 9 |  |  | Yes | (b)
AROs – nuclear and other | 25 |  | 25 |  |  |  | (d)
Customer connect project(c) | 22 |  | 24 |  |  |  | 2030
Vacation accrual(c) | 15 |  | 14 |  |  |  | 2026
Other | 19 |  | 26 |  |  | (e) | (b)
Total regulatory assets | 456 |  | 528 |  |  |  |
Less: Current portion | 106 |  | 141 |  |  |  |
Total noncurrent regulatory assets | $ | 350 |  | $ | 387 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
COR regulatory liability(c) | $ | 425 |  | $ | 405 |  |  | (e) | (d)
Net regulatory liability related to income taxes | 353 |  | 366 |  |  |  | (b)
Other | 44 |  | 76 |  |  | (e) | (b)
Total regulatory liabilities | 822 |  | 847 |  |  |  |
Less: Current portion | 20 |  | 64 |  |  |  |
Total noncurrent regulatory liabilities | $ | 802 |  | $ | 783 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Recovery over the life of the associated assets. (e) Certain costs earn/pay a return. (f) Balance will fluctuate with changes in the market. (g) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.
Schedule of Regulatory Liabilities | The following tables present the regulatory assets and liabilities recorded on Piedmont's Consolidated Balance Sheets.
| December 31, |  | Earns/Pays | Recovery/Refund
(in millions) | 2025 | 2024 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
Accrued pension and OPEB(c) | $ | 131 |  | $ | 144 |  |  |  | (g)
Deferred pipeline integrity costs(c) | 91 |  | 101 |  |  |  | 2034
Derivatives – natural gas supply contracts(f) | 72 |  | 94 |  |  |  | 2031
Decoupling | 28 |  | 77 |  |  | Yes | (b)
Pipeline Integrity Management – Transmission/Distribution | 27 |  | 14 |  |  |  | (b)
Deferred purchased gas costs | 26 |  | 9 |  |  | Yes | (b)
AROs – nuclear and other | 25 |  | 25 |  |  |  | (d)
Customer connect project(c) | 22 |  | 24 |  |  |  | 2030
Vacation accrual(c) | 15 |  | 14 |  |  |  | 2026
Other | 19 |  | 26 |  |  | (e) | (b)
Total regulatory assets | 456 |  | 528 |  |  |  |
Less: Current portion | 106 |  | 141 |  |  |  |
Total noncurrent regulatory assets | $ | 350 |  | $ | 387 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
COR regulatory liability(c) | $ | 425 |  | $ | 405 |  |  | (e) | (d)
Net regulatory liability related to income taxes | 353 |  | 366 |  |  |  | (b)
Other | 44 |  | 76 |  |  | (e) | (b)
Total regulatory liabilities | 822 |  | 847 |  |  |  |
Less: Current portion | 20 |  | 64 |  |  |  |
Total noncurrent regulatory liabilities | $ | 802 |  | $ | 783 |  |  |  |
(a) Regulatory assets and liabilities are excluded from rate base unless otherwise noted. (b) The expected recovery or refund period varies or has not been determined. (c) Included in rate base. (d) Recovery over the life of the associated assets. (e) Certain costs earn/pay a return. (f) Balance will fluctuate with changes in the market. (g) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

X
- Definition Generating facilities that are still operating, but are expected to be retired significantly before the end of their previously estimated useful lives. + References No definition available. + Details
Name: | duk_PotentialPlantRetirementScheduleTableTextBlock
Namespace Prefix: | duk_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of environmental loss contingencies by individual site. Does not include loss contingencies that are not environmental in nature. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 + Details
Name: | us-gaap_ScheduleOfEnvironmentalLossContingenciesBySiteTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 715 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478574/980-715-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-2 + Details
Name: | us-gaap_ScheduleOfRegulatoryAssetsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of regulatory liabilities. Detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 405 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477571/980-405-25-1 + Details
Name: | us-gaap_ScheduleOfRegulatoryLiabilitiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyCarolinasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyProgressMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyFloridaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyOhioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyIndianaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_PiedmontNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |