XML 134 R79.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Regulatory Matters (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
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) | 2023 |  | 2022 |  | 2023 |  | 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – coal ash | $ | 3,214 |  |  | $ | 3,205 |  |  | $ | 1,230 |  |  | $ | 1,429 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – nuclear and other | 1,179 |  |  | 945 |  |  | 1,127 |  |  | 884 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred fuel and purchased power | 2,486 |  |  | 3,866 |  |  | 1,173 |  |  | 2,060 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued pension and OPEB | 2,389 |  |  | 2,336 |  |  | 757 |  |  | 759 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost securitized balance, net | 890 |  |  | 940 |  |  | 682 |  |  | 720 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear asset securitized balance, net | 830 |  |  | 881 |  |  | 830 |  |  | 881 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt fair value adjustment | 774 |  |  | 829 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedge costs deferrals | 749 |  |  | 378 |  |  | 323 |  |  | 128 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost deferrals | 407 |  |  | 687 |  |  | 298 |  |  | 559 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR regulatory asset | 371 |  |  | 221 |  |  | 337 |  |  | 221 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Post-in-service carrying costs (PISCC) and deferred operating expenses | 357 |  |  | 359 |  |  | 42 |  |  | 42 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retired generation facilities | 275 |  |  | 316 |  |  | 220 |  |  | 243 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred asset – Lee and Harris COLA | 252 |  |  | 288 |  |  | 15 |  |  | 21 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer connect project | 251 |  |  | 271 |  |  | 125 |  |  | 136 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advanced metering infrastructure (AMI) | 243 |  |  | 283 |  |  | 92 |  |  | 111 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Incremental COVID-19 expenses | 237 |  |  | 210 |  |  | 80 |  |  | 78 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vacation accrual | 228 |  |  | 222 |  |  | 43 |  |  | 43 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grid Deferral | 210 |  |  | 136 |  |  | 51 |  |  | 40 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Demand side management (DSM)/Energy efficiency (EE) | 201 |  |  | 189 |  |  | 191 |  |  | 188 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CEP deferral | 193 |  |  | 190 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NCEMPA deferrals | 172 |  |  | 157 |  |  | 172 |  |  | 157 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives – natural gas supply contracts | 147 |  |  | 168 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred pipeline integrity costs | 133 |  |  | 121 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear deferral | 131 |  |  | 154 |  |  | 42 |  |  | 64 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR settlement | 115 |  |  | 120 |  |  | 30 |  |  | 32 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decoupling | 115 |  |  | 42 |  |  | 15 |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred coal ash handling system costs | 86 |  |  | 92 |  |  | 21 |  |  | 25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Qualifying facility contract buyouts | 68 |  |  | 81 |  |  | 68 |  |  | 81 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Network Integration Transmission Services deferral | 31 |  |  | 23 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transmission expansion obligation | 30 |  |  | 31 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
East Bend deferrals | 28 |  |  | 33 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Propane caverns | 26 |  |  | 26 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tennessee ARM Deferral | 20 |  |  | 3 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | 428 |  |  | 327 |  |  | 127 |  |  | 77 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory assets | 17,266 |  |  | 18,130 |  |  | 8,091 |  |  | 8,979 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion | 3,648 |  |  | 3,485 |  |  | 1,661 |  |  | 1,833 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory assets | $ | 13,618 |  |  | $ | 14,645 |  |  | $ | 6,430 |  |  | $ | 7,146 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net regulatory liability related to income taxes | $ | 5,901 |  |  | $ | 6,462 |  |  | $ | 2,008 |  |  | $ | 2,192 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR regulatory liability | 5,497 |  |  | 5,151 |  |  | 2,805 |  |  | 2,269 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – nuclear and other | 1,673 |  |  | 1,038 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedge cost deferrals | 443 |  |  | 683 |  |  | 208 |  |  | 252 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued pension and OPEB | 266 |  |  | 211 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred fuel and purchased power | 137 |  |  | 35 |  |  | 14 |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DSM/EE | 89 |  |  | 88 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DOE Settlement | 32 |  |  | 154 |  |  | 32 |  |  | 154 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for rate refunds | 15 |  |  | 78 |  |  | 4 |  |  | 28 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | 1,355 |  |  | 1,148 |  |  | 430 |  |  | 434 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory liabilities | 15,408 |  |  | 15,048 |  |  | 5,501 |  |  | 5,329 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion | 1,369 |  |  | 1,466 |  |  | 418 |  |  | 576 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory liabilities | $ | 14,039 |  |  | $ | 13,582 |  |  | $ | 5,083 |  |  | $ | 4,753 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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) | 2023 |  | 2022 |  | 2023 |  | 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – coal ash | $ | 3,214 |  |  | $ | 3,205 |  |  | $ | 1,230 |  |  | $ | 1,429 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – nuclear and other | 1,179 |  |  | 945 |  |  | 1,127 |  |  | 884 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred fuel and purchased power | 2,486 |  |  | 3,866 |  |  | 1,173 |  |  | 2,060 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued pension and OPEB | 2,389 |  |  | 2,336 |  |  | 757 |  |  | 759 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost securitized balance, net | 890 |  |  | 940 |  |  | 682 |  |  | 720 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear asset securitized balance, net | 830 |  |  | 881 |  |  | 830 |  |  | 881 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt fair value adjustment | 774 |  |  | 829 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedge costs deferrals | 749 |  |  | 378 |  |  | 323 |  |  | 128 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm cost deferrals | 407 |  |  | 687 |  |  | 298 |  |  | 559 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR regulatory asset | 371 |  |  | 221 |  |  | 337 |  |  | 221 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Post-in-service carrying costs (PISCC) and deferred operating expenses | 357 |  |  | 359 |  |  | 42 |  |  | 42 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retired generation facilities | 275 |  |  | 316 |  |  | 220 |  |  | 243 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred asset – Lee and Harris COLA | 252 |  |  | 288 |  |  | 15 |  |  | 21 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer connect project | 251 |  |  | 271 |  |  | 125 |  |  | 136 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advanced metering infrastructure (AMI) | 243 |  |  | 283 |  |  | 92 |  |  | 111 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Incremental COVID-19 expenses | 237 |  |  | 210 |  |  | 80 |  |  | 78 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vacation accrual | 228 |  |  | 222 |  |  | 43 |  |  | 43 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grid Deferral | 210 |  |  | 136 |  |  | 51 |  |  | 40 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Demand side management (DSM)/Energy efficiency (EE) | 201 |  |  | 189 |  |  | 191 |  |  | 188 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CEP deferral | 193 |  |  | 190 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NCEMPA deferrals | 172 |  |  | 157 |  |  | 172 |  |  | 157 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives – natural gas supply contracts | 147 |  |  | 168 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred pipeline integrity costs | 133 |  |  | 121 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nuclear deferral | 131 |  |  | 154 |  |  | 42 |  |  | 64 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR settlement | 115 |  |  | 120 |  |  | 30 |  |  | 32 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decoupling | 115 |  |  | 42 |  |  | 15 |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred coal ash handling system costs | 86 |  |  | 92 |  |  | 21 |  |  | 25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Qualifying facility contract buyouts | 68 |  |  | 81 |  |  | 68 |  |  | 81 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Network Integration Transmission Services deferral | 31 |  |  | 23 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transmission expansion obligation | 30 |  |  | 31 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
East Bend deferrals | 28 |  |  | 33 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Propane caverns | 26 |  |  | 26 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tennessee ARM Deferral | 20 |  |  | 3 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | 428 |  |  | 327 |  |  | 127 |  |  | 77 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory assets | 17,266 |  |  | 18,130 |  |  | 8,091 |  |  | 8,979 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion | 3,648 |  |  | 3,485 |  |  | 1,661 |  |  | 1,833 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory assets | $ | 13,618 |  |  | $ | 14,645 |  |  | $ | 6,430 |  |  | $ | 7,146 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net regulatory liability related to income taxes | $ | 5,901 |  |  | $ | 6,462 |  |  | $ | 2,008 |  |  | $ | 2,192 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
COR regulatory liability | 5,497 |  |  | 5,151 |  |  | 2,805 |  |  | 2,269 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AROs – nuclear and other | 1,673 |  |  | 1,038 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedge cost deferrals | 443 |  |  | 683 |  |  | 208 |  |  | 252 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued pension and OPEB | 266 |  |  | 211 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred fuel and purchased power | 137 |  |  | 35 |  |  | 14 |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DSM/EE | 89 |  |  | 88 |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DOE Settlement | 32 |  |  | 154 |  |  | 32 |  |  | 154 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for rate refunds | 15 |  |  | 78 |  |  | 4 |  |  | 28 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | 1,355 |  |  | 1,148 |  |  | 430 |  |  | 434 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total regulatory liabilities | 15,408 |  |  | 15,048 |  |  | 5,501 |  |  | 5,329 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion | 1,369 |  |  | 1,466 |  |  | 418 |  |  | 576 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory liabilities | $ | 14,039 |  |  | $ | 13,582 |  |  | $ | 5,083 |  |  | $ | 4,753 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Potential Plant Retirements |
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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 1,559 |  | $ | 1,391 |  |  | (g) | (b)
Deferred fuel and purchased power(i) | 1,293 |  | 1,614 |  |  | (e) | 2025
Accrued pension and OPEB | 671 |  | 614 |  |  |  | (h)
Storm cost securitized balance, net | 208 |  | 220 |  |  | Yes | 2041
Hedge costs deferrals | 405 |  | 228 |  |  |  | (b)
Storm cost deferrals | 97 |  | 114 |  |  | Yes | (b)
PISCC and deferred operating expenses | 48 |  | 47 |  |  | Yes | (b)
Retired generation facilities(c) | 26 |  | 39 |  |  | Yes | (b)
Deferred asset – Lee COLA | 237 |  | 267 |  |  |  | (b)
Customer connect project(c) | 58 |  | 62 |  |  | Yes | (b)
AMI(c) | 125 |  | 139 |  |  | Yes | (b)
Incremental COVID-19 expenses | 152 |  | 127 |  |  | Yes | (b)
Vacation accrual | 87 |  | 84 |  |  |  | 2024
Grid Deferral(c) | 159 |  | 96 |  |  | Yes | (b)
Nuclear deferral | 89 |  | 90 |  |  |  | 2025
COR settlement(c) | 85 |  | 88 |  |  | Yes | (b)
Deferred coal ash handling system costs(c) | 65 |  | 67 |  |  | Yes | (b)
Other | 116 |  | 101 |  |  |  | (b)
Total regulatory assets | 5,480 |  | 5,388 |  |  |  |
Less: Current portion | 1,564 |  | 1,095 |  |  |  |
Total noncurrent regulatory assets | $ | 3,916 |  | $ | 4,293 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes(d) | $ | 2,200 |  | $ | 2,475 |  |  | Yes | (b)
COR regulatory liability(c) | 1,641 |  | 1,769 |  |  | Yes | (f)
AROs – nuclear and other | 1,673 |  | 1,038 |  |  |  | (b)
Hedge cost deferrals | 158 |  | 350 |  |  |  | (b)
Accrued pension and OPEB | 106 |  | 44 |  |  |  | (h)
Deferred fuel and purchased power(i) | 85 |  | — |  |  | (e) | 2025
DSM/EE(c) | 87 |  | 86 |  |  | Yes | (j)
Provision for rate refunds(c) | 11 |  | 50 |  |  | Yes | (b)
Other | 616 |  | 501 |  |  |  | (b)
Total regulatory liabilities | 6,577 |  | 6,313 |  |  |  |
Less: Current portion | 587 |  | 530 |  |  |  |
Total noncurrent regulatory liabilities | $ | 5,990 |  | $ | 5,783 |  |  |  |
(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) 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) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (i) Duke Energy Carolinas submitted a fuel filing to the NCUC in February 2023 for recovery of $998 million, which included deferrals through December 2022. The NCUC approved recovery of this balance through December 2024. The next filing will be made in the first quarter of 2024. Duke Energy Carolinas submitted a fuel filing to the PSCSC in August 2023 for recovery of $310 million, which included deferrals through May 2023. The PSCSC approved recovery of this balance through October 2024. The next filing will be made in the third quarter of 2024. (j) 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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 1,559 |  | $ | 1,391 |  |  | (g) | (b)
Deferred fuel and purchased power(i) | 1,293 |  | 1,614 |  |  | (e) | 2025
Accrued pension and OPEB | 671 |  | 614 |  |  |  | (h)
Storm cost securitized balance, net | 208 |  | 220 |  |  | Yes | 2041
Hedge costs deferrals | 405 |  | 228 |  |  |  | (b)
Storm cost deferrals | 97 |  | 114 |  |  | Yes | (b)
PISCC and deferred operating expenses | 48 |  | 47 |  |  | Yes | (b)
Retired generation facilities(c) | 26 |  | 39 |  |  | Yes | (b)
Deferred asset – Lee COLA | 237 |  | 267 |  |  |  | (b)
Customer connect project(c) | 58 |  | 62 |  |  | Yes | (b)
AMI(c) | 125 |  | 139 |  |  | Yes | (b)
Incremental COVID-19 expenses | 152 |  | 127 |  |  | Yes | (b)
Vacation accrual | 87 |  | 84 |  |  |  | 2024
Grid Deferral(c) | 159 |  | 96 |  |  | Yes | (b)
Nuclear deferral | 89 |  | 90 |  |  |  | 2025
COR settlement(c) | 85 |  | 88 |  |  | Yes | (b)
Deferred coal ash handling system costs(c) | 65 |  | 67 |  |  | Yes | (b)
Other | 116 |  | 101 |  |  |  | (b)
Total regulatory assets | 5,480 |  | 5,388 |  |  |  |
Less: Current portion | 1,564 |  | 1,095 |  |  |  |
Total noncurrent regulatory assets | $ | 3,916 |  | $ | 4,293 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes(d) | $ | 2,200 |  | $ | 2,475 |  |  | Yes | (b)
COR regulatory liability(c) | 1,641 |  | 1,769 |  |  | Yes | (f)
AROs – nuclear and other | 1,673 |  | 1,038 |  |  |  | (b)
Hedge cost deferrals | 158 |  | 350 |  |  |  | (b)
Accrued pension and OPEB | 106 |  | 44 |  |  |  | (h)
Deferred fuel and purchased power(i) | 85 |  | — |  |  | (e) | 2025
DSM/EE(c) | 87 |  | 86 |  |  | Yes | (j)
Provision for rate refunds(c) | 11 |  | 50 |  |  | Yes | (b)
Other | 616 |  | 501 |  |  |  | (b)
Total regulatory liabilities | 6,577 |  | 6,313 |  |  |  |
Less: Current portion | 587 |  | 530 |  |  |  |
Total noncurrent regulatory liabilities | $ | 5,990 |  | $ | 5,783 |  |  |  |
(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) 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) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (i) Duke Energy Carolinas submitted a fuel filing to the NCUC in February 2023 for recovery of $998 million, which included deferrals through December 2022. The NCUC approved recovery of this balance through December 2024. The next filing will be made in the first quarter of 2024. Duke Energy Carolinas submitted a fuel filing to the PSCSC in August 2023 for recovery of $310 million, which included deferrals through May 2023. The PSCSC approved recovery of this balance through October 2024. The next filing will be made in the third quarter of 2024. (j) 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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 1,218 |  | $ | 1,418 |  |  | (g) | (b)
AROs – nuclear and other | 1,110 |  | 869 |  |  |  | (c)
Deferred fuel and purchased power(l) | 579 |  | 705 |  |  | (e) | 2025
Accrued pension and OPEB | 408 |  | 417 |  |  |  | (j)
Storm cost securitized balance, net | 682 |  | 720 |  |  | Yes | 2041
Hedge costs deferrals | 260 |  | 55 |  |  |  | (b)
Storm cost deferrals | 228 |  | 234 |  |  | Yes | (b)
PISCC and deferred operating expenses | 42 |  | 42 |  |  | Yes | 2054
Retired generation facilities(d) | 126 |  | 149 |  |  | Yes | (b)
Deferred asset – Harris COLA | 15 |  | 21 |  |  |  | (b)
Customer connect project(d) | 49 |  | 54 |  |  | Yes | (b)
AMI(d) | 68 |  | 81 |  |  | Yes | (b)
Incremental COVID-19 expenses | 80 |  | 78 |  |  |  | (b)
Vacation accrual | 43 |  | 43 |  |  |  | 2024
Grid Deferral(d) | 51 |  | 40 |  |  | Yes | (b)
DSM/EE(d) | 182 |  | 180 |  |  | Yes | (h)
NCEMPA deferrals(d) | 172 |  | 157 |  |  | (f) | 2042
Nuclear deferral | 42 |  | 64 |  |  |  | 2025
COR settlement(d) | 30 |  | 32 |  |  | Yes | (b)
Decoupling | 15 |  | — |  |  | Yes | (b)
Deferred coal ash handling system costs(d) | 21 |  | 25 |  |  | Yes | (b)
Other | 67 |  | 30 |  |  |  | (b)
Total regulatory assets | 5,488 |  | 5,414 |  |  |  |
Less: Current portion | 942 |  | 690 |  |  |  |
Total noncurrent regulatory assets | $ | 4,546 |  | $ | 4,724 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes(k) | $ | 1,420 |  | $ | 1,559 |  |  | Yes | (b)
COR regulatory liability | 2,805 |  | 2,269 |  |  |  | (i)
Hedge cost deferrals | 87 |  | 252 |  |  |  | (b)
Deferred fuel and purchased power(l) | 14 |  | — |  |  | (e) | 2025
Provision for rate refunds(d) | 4 |  | 28 |  |  | Yes | (b)
Other | 345 |  | 344 |  |  |  | (b)
Total regulatory liabilities | 4,675 |  | 4,452 |  |  |  |
Less: Current portion | 300 |  | 332 |  |  |  |
Total noncurrent regulatory liabilities | $ | 4,375 |  | $ | 4,120 |  |  |  |
(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) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism. (i) Recovered over the life of the associated assets. (j) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (k) 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. (l) Duke Energy Progress submitted a fuel filing to the NCUC in June 2023 for recovery of $445 million, which included deferrals through March 2023. The NCUC approved recovery of this balance through November 2024. The next filing will be made in the second quarter of 2024. Duke Energy Progress submitted a fuel filing to the PSCSC in May 2023 for recovery of $79 million, which included deferrals through February 2023. The PSCSC approved recovery of this balance through July 2024. The next filing will be made in the second quarter of 2024.
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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 1,218 |  | $ | 1,418 |  |  | (g) | (b)
AROs – nuclear and other | 1,110 |  | 869 |  |  |  | (c)
Deferred fuel and purchased power(l) | 579 |  | 705 |  |  | (e) | 2025
Accrued pension and OPEB | 408 |  | 417 |  |  |  | (j)
Storm cost securitized balance, net | 682 |  | 720 |  |  | Yes | 2041
Hedge costs deferrals | 260 |  | 55 |  |  |  | (b)
Storm cost deferrals | 228 |  | 234 |  |  | Yes | (b)
PISCC and deferred operating expenses | 42 |  | 42 |  |  | Yes | 2054
Retired generation facilities(d) | 126 |  | 149 |  |  | Yes | (b)
Deferred asset – Harris COLA | 15 |  | 21 |  |  |  | (b)
Customer connect project(d) | 49 |  | 54 |  |  | Yes | (b)
AMI(d) | 68 |  | 81 |  |  | Yes | (b)
Incremental COVID-19 expenses | 80 |  | 78 |  |  |  | (b)
Vacation accrual | 43 |  | 43 |  |  |  | 2024
Grid Deferral(d) | 51 |  | 40 |  |  | Yes | (b)
DSM/EE(d) | 182 |  | 180 |  |  | Yes | (h)
NCEMPA deferrals(d) | 172 |  | 157 |  |  | (f) | 2042
Nuclear deferral | 42 |  | 64 |  |  |  | 2025
COR settlement(d) | 30 |  | 32 |  |  | Yes | (b)
Decoupling | 15 |  | — |  |  | Yes | (b)
Deferred coal ash handling system costs(d) | 21 |  | 25 |  |  | Yes | (b)
Other | 67 |  | 30 |  |  |  | (b)
Total regulatory assets | 5,488 |  | 5,414 |  |  |  |
Less: Current portion | 942 |  | 690 |  |  |  |
Total noncurrent regulatory assets | $ | 4,546 |  | $ | 4,724 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes(k) | $ | 1,420 |  | $ | 1,559 |  |  | Yes | (b)
COR regulatory liability | 2,805 |  | 2,269 |  |  |  | (i)
Hedge cost deferrals | 87 |  | 252 |  |  |  | (b)
Deferred fuel and purchased power(l) | 14 |  | — |  |  | (e) | 2025
Provision for rate refunds(d) | 4 |  | 28 |  |  | Yes | (b)
Other | 345 |  | 344 |  |  |  | (b)
Total regulatory liabilities | 4,675 |  | 4,452 |  |  |  |
Less: Current portion | 300 |  | 332 |  |  |  |
Total noncurrent regulatory liabilities | $ | 4,375 |  | $ | 4,120 |  |  |  |
(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) Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders. (h) Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism. (i) Recovered over the life of the associated assets. (j) Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail. (k) 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. (l) Duke Energy Progress submitted a fuel filing to the NCUC in June 2023 for recovery of $445 million, which included deferrals through March 2023. The NCUC approved recovery of this balance through November 2024. The next filing will be made in the second quarter of 2024. Duke Energy Progress submitted a fuel filing to the PSCSC in May 2023 for recovery of $79 million, which included deferrals through February 2023. The PSCSC approved recovery of this balance through July 2024. The next filing will be made in the second quarter of 2024.
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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 12 |  | $ | 11 |  |  |  | (b)
AROs – nuclear and other | 17 |  | 15 |  |  |  | (b)
Deferred fuel and purchased power(g) | 594 |  | 1,355 |  |  | (e) | 2024
Accrued pension and OPEB(c) | 349 |  | 342 |  |  | Yes | (f)
Nuclear asset securitized balance, net | 830 |  | 881 |  |  |  | 2036
Hedge costs deferrals(c) | 63 |  | 73 |  |  | Yes | 2038
Storm cost deferrals(c) | 70 |  | 325 |  |  | (e) | (b)
COR regulatory asset | 337 |  | 221 |  |  | (d) | (b)
Retired generation facilities(c) | 94 |  | 94 |  |  | Yes | 2044
Customer connect project(c) | 76 |  | 82 |  |  | Yes | 2037
AMI(c) | 24 |  | 30 |  |  | Yes | 2032
Qualifying facility contract buyouts(c) | 68 |  | 81 |  |  | Yes | 2034
Other | 69 |  | 55 |  |  | (d) | (b)
Total regulatory assets | 2,603 |  | 3,565 |  |  |  |
Less: Current portion | 720 |  | 1,143 |  |  |  |
Total noncurrent regulatory assets | $ | 1,883 |  | $ | 2,422 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes(c) | $ | 588 |  | $ | 633 |  |  |  | (b)
Hedge cost deferrals | 121 |  | — |  |  |  | (b)
DOE Settlement | 32 |  | 154 |  |  |  | 2024
Other | 85 |  | 90 |  |  | (d) | (b)
Total regulatory liabilities | 826 |  | 877 |  |  |  |
Less: Current portion | 118 |  | 244 |  |  |  |
Total noncurrent regulatory liabilities | $ | 708 |  | $ | 633 |  |  |  |
(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. (g) On March 6, 2023, the FPSC approved Duke Energy Florida's amended February 2023 fuel filing recovery of $469 million, which included the 2022 actual under-recovery of $1.2 billion, offset by projected declining fuel costs in 2023 due to lower natural gas prices. The approved 21-month recovery period for the actual 2022 under-recovery is April 2023 through December 2024; the reduction in 2023 fuel costs were approved to be returned over 9-months from April 2023 through December 2023. Duke Energy Florida made its most recent fuel filing in September 2023. On November 1, 2023, the FPSC approved Duke Energy Florida's September 2023 fuel filing, which included the proposed fuel factors for 2024. In addition to the under-recoveries approved above, that filing also included a re-projected 2023 over-recovery of approximately $120 million that will be returned to customers January 2024 through December 2024.
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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 12 |  | $ | 11 |  |  |  | (b)
AROs – nuclear and other | 17 |  | 15 |  |  |  | (b)
Deferred fuel and purchased power(g) | 594 |  | 1,355 |  |  | (e) | 2024
Accrued pension and OPEB(c) | 349 |  | 342 |  |  | Yes | (f)
Nuclear asset securitized balance, net | 830 |  | 881 |  |  |  | 2036
Hedge costs deferrals(c) | 63 |  | 73 |  |  | Yes | 2038
Storm cost deferrals(c) | 70 |  | 325 |  |  | (e) | (b)
COR regulatory asset | 337 |  | 221 |  |  | (d) | (b)
Retired generation facilities(c) | 94 |  | 94 |  |  | Yes | 2044
Customer connect project(c) | 76 |  | 82 |  |  | Yes | 2037
AMI(c) | 24 |  | 30 |  |  | Yes | 2032
Qualifying facility contract buyouts(c) | 68 |  | 81 |  |  | Yes | 2034
Other | 69 |  | 55 |  |  | (d) | (b)
Total regulatory assets | 2,603 |  | 3,565 |  |  |  |
Less: Current portion | 720 |  | 1,143 |  |  |  |
Total noncurrent regulatory assets | $ | 1,883 |  | $ | 2,422 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes(c) | $ | 588 |  | $ | 633 |  |  |  | (b)
Hedge cost deferrals | 121 |  | — |  |  |  | (b)
DOE Settlement | 32 |  | 154 |  |  |  | 2024
Other | 85 |  | 90 |  |  | (d) | (b)
Total regulatory liabilities | 826 |  | 877 |  |  |  |
Less: Current portion | 118 |  | 244 |  |  |  |
Total noncurrent regulatory liabilities | $ | 708 |  | $ | 633 |  |  |  |
(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. (g) On March 6, 2023, the FPSC approved Duke Energy Florida's amended February 2023 fuel filing recovery of $469 million, which included the 2022 actual under-recovery of $1.2 billion, offset by projected declining fuel costs in 2023 due to lower natural gas prices. The approved 21-month recovery period for the actual 2022 under-recovery is April 2023 through December 2024; the reduction in 2023 fuel costs were approved to be returned over 9-months from April 2023 through December 2023. Duke Energy Florida made its most recent fuel filing in September 2023. On November 1, 2023, the FPSC approved Duke Energy Florida's September 2023 fuel filing, which included the proposed fuel factors for 2024. In addition to the under-recoveries approved above, that filing also included a re-projected 2023 over-recovery of approximately $120 million that will be returned to customers January 2024 through December 2024.
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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 17 |  | $ | — |  |  | Yes | (b)
Deferred fuel and purchased gas costs | 20 |  | 54 |  |  |  | 2024
Accrued pension and OPEB | 123 |  | 129 |  |  |  | (e)
Storm cost deferrals | 12 |  | 14 |  |  |  | 2024
COR regulatory asset | 34 |  | — |  |  |  | (b)
PISCC and deferred operating expenses(c) | 15 |  | 15 |  |  | Yes | 2083
Customer connect project | 49 |  | 54 |  |  |  | (b)
AMI | 13 |  | 18 |  |  |  | (b)
CEP deferral | 193 |  | 190 |  |  | Yes | (b)
Deferred pipeline integrity costs | 30 |  | 28 |  |  | Yes | (b)
Decoupling | 25 |  | — |  |  |  | (b)
Network Integration Transmission Services deferral | 31 |  | 23 |  |  | Yes | (b)
Transmission expansion obligation | 30 |  | 31 |  |  |  | (b)
East Bend deferrals(c) | 28 |  | 33 |  |  | Yes | (b)
Propane caverns | 26 |  | 26 |  |  |  | (b)
Other | 103 |  | 69 |  |  |  | (b)
Total regulatory assets | 749 |  | 684 |  |  |  |
Less: Current portion | 73 |  | 103 |  |  |  |
Total noncurrent regulatory assets | $ | 676 |  | $ | 581 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 466 |  | $ | 496 |  |  |  | (b)
COR regulatory liability | — |  | 9 |  |  |  | (d)
Accrued pension and OPEB | 17 |  | 21 |  |  |  | (e)
Deferred fuel and purchased gas costs | 15 |  | 35 |  |  |  | 2024
Other | 55 |  | 72 |  |  |  | (b)
Total regulatory liabilities | 553 |  | 633 |  |  |  |
Less: Current portion | 56 |  | 99 |  |  |  |
Total noncurrent regulatory liabilities | $ | 497 |  | $ | 534 |  |  |  |
(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) 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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 17 |  | $ | — |  |  | Yes | (b)
Deferred fuel and purchased gas costs | 20 |  | 54 |  |  |  | 2024
Accrued pension and OPEB | 123 |  | 129 |  |  |  | (e)
Storm cost deferrals | 12 |  | 14 |  |  |  | 2024
COR regulatory asset | 34 |  | — |  |  |  | (b)
PISCC and deferred operating expenses(c) | 15 |  | 15 |  |  | Yes | 2083
Customer connect project | 49 |  | 54 |  |  |  | (b)
AMI | 13 |  | 18 |  |  |  | (b)
CEP deferral | 193 |  | 190 |  |  | Yes | (b)
Deferred pipeline integrity costs | 30 |  | 28 |  |  | Yes | (b)
Decoupling | 25 |  | — |  |  |  | (b)
Network Integration Transmission Services deferral | 31 |  | 23 |  |  | Yes | (b)
Transmission expansion obligation | 30 |  | 31 |  |  |  | (b)
East Bend deferrals(c) | 28 |  | 33 |  |  | Yes | (b)
Propane caverns | 26 |  | 26 |  |  |  | (b)
Other | 103 |  | 69 |  |  |  | (b)
Total regulatory assets | 749 |  | 684 |  |  |  |
Less: Current portion | 73 |  | 103 |  |  |  |
Total noncurrent regulatory assets | $ | 676 |  | $ | 581 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 466 |  | $ | 496 |  |  |  | (b)
COR regulatory liability | — |  | 9 |  |  |  | (d)
Accrued pension and OPEB | 17 |  | 21 |  |  |  | (e)
Deferred fuel and purchased gas costs | 15 |  | 35 |  |  |  | 2024
Other | 55 |  | 72 |  |  |  | (b)
Total regulatory liabilities | 553 |  | 633 |  |  |  |
Less: Current portion | 56 |  | 99 |  |  |  |
Total noncurrent regulatory liabilities | $ | 497 |  | $ | 534 |  |  |  |
(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) 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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 408 |  | $ | 385 |  |  | Yes | (b)
Deferred fuel and purchased power | — |  | 138 |  |  |  | 2024
Accrued pension and OPEB | 208 |  | 214 |  |  |  | (e)
Hedge costs deferrals | 19 |  | 20 |  |  |  | (b)
PISCC and deferred operating expenses(c) | 252 |  | 255 |  |  | Yes | (b)
Retired generation facilities(c) | 29 |  | 34 |  |  | Yes | 2030
Customer connect project | 19 |  | 19 |  |  |  | (b)
AMI | 13 |  | 15 |  |  |  | 2031
Other | 48 |  | 44 |  |  |  | (b)
Total regulatory assets | 996 |  | 1,124 |  |  |  |
Less: Current portion | 102 |  | 249 |  |  |  |
Total noncurrent regulatory assets | $ | 894 |  | $ | 875 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 794 |  | $ | 840 |  |  |  | (b)
COR regulatory liability | 496 |  | 531 |  |  |  | (d)
Hedge cost deferrals | 77 |  | 81 |  |  |  | (b)
Accrued pension and OPEB | 109 |  | 104 |  |  |  | (e)
Deferred fuel and purchased power | 23 |  | — |  |  |  | 2024
Other | 169 |  | 85 |  |  |  | (b)
Total regulatory liabilities | 1,668 |  | 1,641 |  |  |  |
Less: Current portion | 209 |  | 187 |  |  |  |
Total noncurrent regulatory liabilities | $ | 1,459 |  | $ | 1,454 |  |  |  |
(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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – coal ash | $ | 408 |  | $ | 385 |  |  | Yes | (b)
Deferred fuel and purchased power | — |  | 138 |  |  |  | 2024
Accrued pension and OPEB | 208 |  | 214 |  |  |  | (e)
Hedge costs deferrals | 19 |  | 20 |  |  |  | (b)
PISCC and deferred operating expenses(c) | 252 |  | 255 |  |  | Yes | (b)
Retired generation facilities(c) | 29 |  | 34 |  |  | Yes | 2030
Customer connect project | 19 |  | 19 |  |  |  | (b)
AMI | 13 |  | 15 |  |  |  | 2031
Other | 48 |  | 44 |  |  |  | (b)
Total regulatory assets | 996 |  | 1,124 |  |  |  |
Less: Current portion | 102 |  | 249 |  |  |  |
Total noncurrent regulatory assets | $ | 894 |  | $ | 875 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 794 |  | $ | 840 |  |  |  | (b)
COR regulatory liability | 496 |  | 531 |  |  |  | (d)
Hedge cost deferrals | 77 |  | 81 |  |  |  | (b)
Accrued pension and OPEB | 109 |  | 104 |  |  |  | (e)
Deferred fuel and purchased power | 23 |  | — |  |  |  | 2024
Other | 169 |  | 85 |  |  |  | (b)
Total regulatory liabilities | 1,668 |  | 1,641 |  |  |  |
Less: Current portion | 209 |  | 187 |  |  |  |
Total noncurrent regulatory liabilities | $ | 1,459 |  | $ | 1,454 |  |  |  |
(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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – nuclear and other | $ | 26 |  | $ | 27 |  |  |  | (d)
Accrued pension and OPEB(c) | 129 |  | 119 |  |  |  | (g)
Vacation accrual | 13 |  | 12 |  |  |  | 2024
Derivatives – natural gas supply contracts(f) | 147 |  | 168 |  |  |  |
Deferred pipeline integrity costs(c) | 103 |  | 93 |  |  |  | 2025
Decoupling | 75 |  | 42 |  |  | (e) | (b)
Tennessee ARM Deferral | 20 |  | 3 |  |  | (e) | (b)
Other | 58 |  | 47 |  |  | (e) | (b)
Total regulatory assets | 571 |  | 511 |  |  |  |
Less: Current portion | 161 |  | 119 |  |  |  |
Total noncurrent regulatory assets | $ | 410 |  | $ | 392 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 433 |  | $ | 459 |  |  |  | (b)
COR regulatory liability(c) | 555 |  | 573 |  |  |  | (d)
Other | 98 |  | 66 |  |  | (e) | (b)
Total regulatory liabilities | 1,086 |  | 1,098 |  |  |  |
Less: Current portion | 98 |  | 74 |  |  |  |
Total noncurrent regulatory liabilities | $ | 988 |  | $ | 1,024 |  |  |  |
(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. Current contracts extend into 2031. (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) | 2023 | 2022 |  | a Return | Period Ends
Regulatory Assets(a) |  |  |  |  |
AROs – nuclear and other | $ | 26 |  | $ | 27 |  |  |  | (d)
Accrued pension and OPEB(c) | 129 |  | 119 |  |  |  | (g)
Vacation accrual | 13 |  | 12 |  |  |  | 2024
Derivatives – natural gas supply contracts(f) | 147 |  | 168 |  |  |  |
Deferred pipeline integrity costs(c) | 103 |  | 93 |  |  |  | 2025
Decoupling | 75 |  | 42 |  |  | (e) | (b)
Tennessee ARM Deferral | 20 |  | 3 |  |  | (e) | (b)
Other | 58 |  | 47 |  |  | (e) | (b)
Total regulatory assets | 571 |  | 511 |  |  |  |
Less: Current portion | 161 |  | 119 |  |  |  |
Total noncurrent regulatory assets | $ | 410 |  | $ | 392 |  |  |  |
Regulatory Liabilities(a) |  |  |  |  |
Net regulatory liability related to income taxes | $ | 433 |  | $ | 459 |  |  |  | (b)
COR regulatory liability(c) | 555 |  | 573 |  |  |  | (d)
Other | 98 |  | 66 |  |  | (e) | (b)
Total regulatory liabilities | 1,086 |  | 1,098 |  |  |  |
Less: Current portion | 98 |  | 74 |  |  |  |
Total noncurrent regulatory liabilities | $ | 988 |  | $ | 1,024 |  |  |  |
(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. Current contracts extend into 2031. (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-types1: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 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//1943274/2147481878/980-340-50-1 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//1943274/2147481691/980-715-50-1 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//1943274/2147481878/980-340-50-2 + 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//1943274/2147481854/980-405-25-1 + 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: |