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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2025
Accounting Policies [Abstract] |
Schedule of Current and Noncurrent Assets and Liabilities | The following table provides a description of amounts included in Other within Current Assets or Current Liabilities that exceed 5% of total Current Assets or Current Liabilities on the Duke Energy Registrants' Consolidated Balance Sheets at either December 31, 2025, or 2024.
|  |  | December 31,
(in millions) | Location |  | 2025 |  | 2024
Duke Energy Carolinas |  |  |  |  |
Accrued compensation | Current Liabilities |  | $ | 302 |  |  | $ | 234 |
Progress Energy |  |  |  |  |
Customer deposits/Collateral liabilities | Current Liabilities |  | $ | 293 |  |  | $ | 281 |
Duke Energy Progress |  |  |  |  |
Accrued compensation | Current Liabilities |  | $ | 143 |  |  | $ | 114 |
Duke Energy Florida |  |  |  |  |
Tax receivables | Current Assets |  | $ | 12 |  |  | $ | 166 |
Customer deposits/Collateral liabilities | Current Liabilities |  | 191 |  |  | 164 |
Duke Energy Indiana |  |  |  |  |
Customer advances | Current Liabilities |  | $ | 117 |  |  | $ | 100 |
Schedule of Cash and Cash Equivalents | The following table presents the components of cash, cash equivalents and restricted cash included on the Consolidated Balance Sheets.
| December 31, 2025 |  | December 31, 2024
|  | Duke |  | Duke | Duke |  |  | Duke |  | Duke | Duke
| Duke | Energy | Progress | Energy | Energy |  | Duke | Energy | Progress | Energy | Energy
(in millions) | Energy | Carolinas | Energy | Progress | Florida |  | Energy | Carolinas | Energy | Progress | Florida
Current Assets |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 245 |  | $ | 3 |  | $ | 54 |  | $ | 16 |  | $ | 21 |  |  | $ | 314 |  | $ | 6 |  | $ | 73 |  | $ | 24 |  | $ | 33 |
Other | 84 |  | 12 |  | 71 |  | 38 |  | 34 |  |  | 84 |  | 9 |  | 76 |  | 40 |  | 35 |
Other Noncurrent Assets |  |  |  |  |  |  |  |  |  |  |
Other | 34 |  | 7 |  | 14 |  | 7 |  | 7 |  |  | 20 |  | 1 |  | 11 |  | 5 |  | 7 |
Total cash, cash equivalents and restricted cash | $ | 363 |  | $ | 22 |  | $ | 139 |  | $ | 61 |  | $ | 62 |  |  | $ | 418 |  | $ | 16 |  | $ | 160 |  | $ | 69 |  | $ | 75 |
Restrictions on Cash and Cash Equivalents | The following table presents the components of cash, cash equivalents and restricted cash included on the Consolidated Balance Sheets.
| December 31, 2025 |  | December 31, 2024
|  | Duke |  | Duke | Duke |  |  | Duke |  | Duke | Duke
| Duke | Energy | Progress | Energy | Energy |  | Duke | Energy | Progress | Energy | Energy
(in millions) | Energy | Carolinas | Energy | Progress | Florida |  | Energy | Carolinas | Energy | Progress | Florida
Current Assets |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 245 |  | $ | 3 |  | $ | 54 |  | $ | 16 |  | $ | 21 |  |  | $ | 314 |  | $ | 6 |  | $ | 73 |  | $ | 24 |  | $ | 33 |
Other | 84 |  | 12 |  | 71 |  | 38 |  | 34 |  |  | 84 |  | 9 |  | 76 |  | 40 |  | 35 |
Other Noncurrent Assets |  |  |  |  |  |  |  |  |  |  |
Other | 34 |  | 7 |  | 14 |  | 7 |  | 7 |  |  | 20 |  | 1 |  | 11 |  | 5 |  | 7 |
Total cash, cash equivalents and restricted cash | $ | 363 |  | $ | 22 |  | $ | 139 |  | $ | 61 |  | $ | 62 |  |  | $ | 418 |  | $ | 16 |  | $ | 160 |  | $ | 69 |  | $ | 75 |
Components of Inventory | The components of inventory are presented in the tables below.
| December 31, 2025
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Materials and supplies | $ | 3,542 |  |  | $ | 1,157 |  |  | $ | 1,789 |  |  | $ | 1,109 |  |  | $ | 680 |  |  | $ | 155 |  |  | $ | 398 |  |  | $ | 10 |
Coal | 715 |  |  | 328 |  |  | 235 |  |  | 155 |  |  | 80 |  |  | 21 |  |  | 131 |  |  | — |
Natural gas, oil and other | 312 |  |  | 45 |  |  | 186 |  |  | 99 |  |  | 87 |  |  | 11 |  |  | 2 |  |  | 67 |
Total inventory | $ | 4,569 |  |  | $ | 1,530 |  |  | $ | 2,210 |  |  | $ | 1,363 |  |  | $ | 847 |  |  | $ | 187 |  |  | $ | 531 |  |  | $ | 77 |
| December 31, 2024
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Materials and supplies | $ | 3,386 |  |  | $ | 1,150 |  |  | $ | 1,649 |  |  | $ | 1,074 |  |  | $ | 576 |  |  | $ | 149 |  |  | $ | 389 |  |  | $ | 11 |
Coal | 801 |  |  | 341 |  |  | 241 |  |  | 164 |  |  | 77 |  |  | 23 |  |  | 196 |  |  | — |
Natural gas, oil and other | 309 |  |  | 45 |  |  | 196 |  |  | 103 |  |  | 92 |  |  | 11 |  |  | 1 |  |  | 55 |
Total inventory | $ | 4,496 |  |  | $ | 1,536 |  |  | $ | 2,086 |  |  | $ | 1,341 |  |  | $ | 745 |  |  | $ | 183 |  |  | $ | 586 |  |  | $ | 66 |
Schedule of Property, Plant and Equipment | The composite weighted average depreciation rates, excluding nuclear fuel, are included in the table that follows.
| Years Ended December 31,
| 2025 |  | 2024 |  | 2023
Duke Energy | 3.1 | % |  | 3.0 | % |  | 2.9 | %
Duke Energy Carolinas | 3.1 | % |  | 3.1 | % |  | 2.7 | %
Progress Energy | 3.2 | % |  | 3.3 | % |  | 3.3 | %
Duke Energy Progress | 3.2 | % |  | 3.2 | % |  | 3.1 | %
Duke Energy Florida | 3.2 | % |  | 3.5 | % |  | 3.5 | %
Duke Energy Ohio | 2.9 | % |  | 2.9 | % |  | 2.8 | %
Duke Energy Indiana | 4.3 | % |  | 3.6 | % |  | 3.6 | %
Piedmont | 2.2 | % |  | 2.2 | % |  | 2.1 | %
The following tables summarize the property, plant and equipment for Duke Energy and its subsidiary registrants.
| December 31, 2025
| Average |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Remaining |  |  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Useful Life |  | Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | (Years) |  | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Land |  |  | $ | 2,667 |  |  | $ | 644 |  |  | $ | 1,226 |  |  | $ | 557 |  |  | $ | 669 |  |  | $ | 289 |  |  | $ | 157 |  |  | $ | 326 |
Plant – Regulated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Electric generation, distribution and transmission | 38 |  | 145,947 |  |  | 52,259 |  |  | 66,751 |  |  | 37,561 |  |  | 29,190 |  |  | 7,945 |  |  | 18,992 |  |  | — |
Natural gas transmission and distribution | 58 |  | 14,201 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 4,529 |  |  | — |  |  | 9,672 |
Other buildings and improvements | 40 |  | 3,214 |  |  | 1,280 |  |  | 854 |  |  | 423 |  |  | 431 |  |  | 437 |  |  | 381 |  |  | 262 |
Nuclear fuel |  |  | 3,683 |  |  | 2,128 |  |  | 1,555 |  |  | 1,555 |  |  | — |  |  | — |  |  | — |  |  | — |
Equipment | 11 |  | 4,193 |  |  | 1,132 |  |  | 1,456 |  |  | 852 |  |  | 604 |  |  | 555 |  |  | 540 |  |  | 131 |
Construction in process |  |  | 10,075 |  |  | 3,708 |  |  | 4,390 |  |  | 2,761 |  |  | 1,629 |  |  | 394 |  |  | 884 |  |  | 408 |
Other | 11 |  | 6,429 |  |  | 1,362 |  |  | 2,115 |  |  | 1,466 |  |  | 637 |  |  | 478 |  |  | 287 |  |  | 526 |
Total property, plant and equipment(a) |  |  | 190,409 |  |  | 62,513 |  |  | 78,347 |  |  | 45,175 |  |  | 33,160 |  |  | 14,627 |  |  | 21,241 |  |  | 11,325 |
Total accumulated depreciation – regulated(b)(c) |  |  | (59,441) |  |  | (20,658) |  |  | (25,425) |  |  | (16,980) |  |  | (8,437) |  |  | (3,812) |  |  | (7,492) |  |  | (2,168) |
Total accumulated depreciation – other(d) |  |  | (1,009) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total net property, plant and equipment |  |  | $ | 129,959 |  |  | $ | 41,855 |  |  | $ | 52,922 |  |  | $ | 28,195 |  |  | $ | 24,723 |  |  | $ | 10,815 |  |  | $ | 13,749 |  |  | $ | 9,157 |
(a) Includes finance leases of $682 million, $349 million, $605 million, $478 million, $127 million and $13 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $208 million, $203 million and $5 million, respectively, of accumulated amortization of finance leases. (b) Includes $1,886 million, $1,064 million, $822 million and $822 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (c) Includes accumulated amortization of finance leases of $98 million and $5 million at Duke Energy Carolinas and Duke Energy Indiana, respectively. (d) Includes accumulated amortization of finance leases of $35 million at Duke Energy.
| December 31, 2024
| Average |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Remaining |  |  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Useful Life |  | Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | (Years) |  | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Land |  |  | $ | 2,503 |  |  | $ | 617 |  |  | $ | 1,134 |  |  | $ | 535 |  |  | $ | 599 |  |  | $ | 258 |  |  | $ | 144 |  |  | $ | 325 |
Plant – Regulated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Electric generation, distribution and transmission | 37 |  | 137,836 |  |  | 49,547 |  |  | 62,351 |  |  | 35,633 |  |  | 26,718 |  |  | 7,634 |  |  | 18,304 |  |  | — |
Natural gas transmission and distribution | 57 |  | 13,482 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 4,255 |  |  | — |  |  | 9,227 |
Other buildings and improvements | 41 |  | 2,948 |  |  | 1,256 |  |  | 698 |  |  | 391 |  |  | 307 |  |  | 418 |  |  | 372 |  |  | 204 |
Nuclear fuel |  |  | 3,518 |  |  | 2,003 |  |  | 1,515 |  |  | 1,515 |  |  | — |  |  | — |  |  | — |  |  | — |
Equipment | 13 |  | 3,850 |  |  | 997 |  |  | 1,252 |  |  | 753 |  |  | 499 |  |  | 542 |  |  | 490 |  |  | 157 |
Construction in process |  |  | 7,756 |  |  | 2,735 |  |  | 3,657 |  |  | 1,884 |  |  | 1,773 |  |  | 385 |  |  | 406 |  |  | 311 |
Other | 10 |  | 6,844 |  |  | 1,227 |  |  | 1,953 |  |  | 1,349 |  |  | 594 |  |  | 426 |  |  | 254 |  |  | 488 |
Total property, plant and equipment(a) |  |  | 178,737 |  |  | 58,382 |  |  | 72,560 |  |  | 42,060 |  |  | 30,490 |  |  | 13,918 |  |  | 19,970 |  |  | 10,712 |
Total accumulated depreciation – regulated(b)(c) |  |  | (55,143) |  |  | (19,090) |  |  | (23,586) |  |  | (15,930) |  |  | (7,650) |  |  | (3,674) |  |  | (6,848) |  |  | (2,041) |
Total accumulated depreciation – other(d) |  |  | (1,968) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total net property, plant and equipment |  |  | $ | 121,626 |  |  | $ | 39,292 |  |  | $ | 48,974 |  |  | $ | 26,130 |  |  | $ | 22,840 |  |  | $ | 10,244 |  |  | $ | 13,122 |  |  | $ | 8,671 |
(a) Includes finance leases of $670 million, $336 million, $620 million, $512 million, $108 million, and $10 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy and Duke Energy Progress amounts are net of $159 million of accumulated amortization of finance leases. (b) Includes $1,824 million, $1,010 million, $814 million and $814 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (c) Includes accumulated amortization of finance leases of $84 million and $4 million at Duke Energy Carolinas and Duke Energy Indiana, respectively. (d) Includes accumulated amortization of finance leases of $25 million at Duke Energy.
Schedule of Accounts Payable and Supplier Invoices Sold | The following table presents the amounts included within Accounts payable on the Consolidated Balance Sheets sold to the financial institution by our suppliers and the supplier invoices sold to the financial institution under the program included within Net cash provided by operating activities on the Consolidated Statements of Cash Flows as of December 31, 2025, and December 31, 2024.
| For the Years Ended December 31, 2024 and 2025 |  |
| Duke |  |  |  |  |  |  |  |  |  |  |  |  |
(in millions) | Energy |  |  |  |  |  |  | Piedmont |  |  |  |  |  |
Confirmed obligations outstanding at December 31, 2023 | $ | 50 |  |  |  |  |  |  |  | $ | 47 |  |  |  |  |  |  |
Invoices confirmed during the period | 156 |  |  |  |  |  |  |  | 152 |  |  |  |  |  |  |
Confirmed invoices paid during the period | (193) |  |  |  |  |  |  |  | (187) |  |  |  |  |  |  |
Confirmed obligations outstanding at December 31, 2024 | $ | 13 |  |  |  |  |  |  |  | $ | 12 |  |  |  |  |  |  |
Invoices confirmed during the period | 71 |  |  |  |  |  |  |  | 69 |  |  |  |  |  |  |
Confirmed invoices paid during the period | (61) |  |  |  |  |  |  |  | (58) |  |  |  |  |  |  |
Confirmed obligations outstanding at December 31, 2025 | $ | 23 |  |  |  |  |  |  |  | $ | 23 |  |  |  |  |  |  |
Schedule of Excise Taxes | Excise taxes accounted for on a gross basis within both Operating Revenues and Property and other taxes on the Consolidated Statements of Operations were as follows.
| Years Ended December 31,
(in millions) | 2025 |  | 2024 |  | 2023
Duke Energy | $ | 447 |  |  | $ | 423 |  |  | $ | 458 |
Duke Energy Carolinas | 27 |  |  | 31 |  |  | 27 |
Progress Energy | 307 |  |  | 285 |  |  | 322 |
Duke Energy Progress | 8 |  |  | 9 |  |  | 5 |
Duke Energy Florida | 299 |  |  | 276 |  |  | 317 |
Duke Energy Ohio | 110 |  |  | 105 |  |  | 106 |
Duke Energy Indiana | — |  |  | — |  |  | 1 |
Piedmont | 3 |  |  | 2 |  |  | 2 |

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