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Organization and Basis of Presentation (Tables) | 6 Months Ended
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Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Cash, Cash Equivalents and Restricted Cash | The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets.
| June 30, 2024 |  | December 31, 2023
|  | Duke |  | Duke | Duke |  |  | Duke |  | Duke | Duke
| Duke | Energy | Progress | Energy | Energy |  | Duke | Energy | Progress | Energy | Energy
| Energy | Carolinas | Energy | Progress | Florida |  | Energy | Carolinas | Energy | Progress | Florida
Current Assets |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 390 |  | $ | 9 |  | $ | 85 |  | $ | 33 |  | $ | 35 |  |  | $ | 253 |  | $ | 9 |  | $ | 59 |  | $ | 18 |  | $ | 24 |
Other | 74 |  | 10 |  | 64 |  | 32 |  | 32 |  |  | 76 |  | 9 |  | 67 |  | 31 |  | 36 |
Other Noncurrent Assets |  |  |  |  |  |  |  |  |  |  |
Other | 18 |  | 1 |  | 11 |  | 5 |  | 6 |  |  | 16 |  | 1 |  | 9 |  | 2 |  | 7 |
Total cash, cash equivalents and restricted cash | $ | 482 |  | $ | 20 |  | $ | 160 |  | $ | 70 |  | $ | 73 |  |  | $ | 345 |  | $ | 19 |  | $ | 135 |  | $ | 51 |  | $ | 67 |
Schedule of Utility Inventory | The components of inventory are presented in the tables below.
| June 30, 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 | $ | 3,254 |  |  | $ | 1,094 |  |  | $ | 1,588 |  |  | $ | 1,051 |  |  | $ | 537 |  |  | $ | 150 |  |  | $ | 373 |  |  | $ | 12 |
Coal | 846 |  |  | 372 |  |  | 233 |  |  | 146 |  |  | 87 |  |  | 29 |  |  | 212 |  |  | — |
Natural gas, oil and other fuel | 290 |  |  | 43 |  |  | 198 |  |  | 106 |  |  | 92 |  |  | 12 |  |  | 2 |  |  | 35 |
Total inventory | $ | 4,390 |  |  | $ | 1,509 |  |  | $ | 2,019 |  |  | $ | 1,303 |  |  | $ | 716 |  |  | $ | 191 |  |  | $ | 587 |  |  | $ | 47 |
| December 31, 2023
|  |  | 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 | $ | 3,086 |  |  | $ | 1,075 |  |  | $ | 1,465 |  |  | $ | 963 |  |  | $ | 502 |  |  | $ | 139 |  |  | $ | 361 |  |  | $ | 12 |
Coal | 842 |  |  | 364 |  |  | 231 |  |  | 154 |  |  | 77 |  |  | 28 |  |  | 219 |  |  | — |
Natural gas, oil and other fuel | 364 |  |  | 45 |  |  | 205 |  |  | 110 |  |  | 95 |  |  | 12 |  |  | 2 |  |  | 100 |
Total inventory | $ | 4,292 |  |  | $ | 1,484 |  |  | $ | 1,901 |  |  | $ | 1,227 |  |  | $ | 674 |  |  | $ | 179 |  |  | $ | 582 |  |  | $ | 112 |
Schedule of Accounts Payable Finance Programs | The following table represents the changes in confirmed obligations outstanding for the six months ended June 30, 2024, and 2023.
| Three months ended June 30, 2023 and 2024
|  | Duke |  | Duke | Duke | Duke | Duke |
| Duke | Energy | Progress | Energy | Energy | Energy | Energy |
(in millions) | Energy | Carolinas | Energy | Progress | Florida | Ohio | Indiana | Piedmont
Confirmed obligations outstanding at March 31, 2023 | $ | 52 |  | $ | 7 |  | $ | 15 |  | $ | 6 |  | $ | 9 |  | $ | — |  | $ | — |  | $ | 29 |
Invoices confirmed during the period | 55 |  | 10 |  | 20 |  | 12 |  | 8 |  | 2 |  | — |  | 24 |
Confirmed invoices paid during the period | (67) |  | (12) |  | (21) |  | (6) |  | (15) |  | — |  | — |  | (34) |
Confirmed obligations outstanding at June 30, 2023 | $ | 40 |  | $ | 5 |  | $ | 14 |  | $ | 12 |  | $ | 2 |  | $ | 2 |  | $ | — |  | $ | 19 |
Confirmed obligations outstanding at the March 31, 2024 | $ | 76 |  | $ | — |  | $ | 2 |  | $ | — |  | $ | 2 |  | $ | — |  | $ | — |  | $ | 74 |
Invoices confirmed during the period | 63 |  | — |  | — |  | — |  | — |  | — |  | — |  | 63 |
Confirmed invoices paid during the period | (111) |  | — |  | (2) |  | — |  | (2) |  | — |  | — |  | (109) |
Confirmed obligations outstanding at June 30, 2024 | $ | 28 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 28 |
| Six Months Ended June 30, 2023 and 2024
|  | Duke |  | Duke | Duke | Duke | Duke |
| Duke | Energy | Progress | Energy | Energy | Energy | Energy |
(in millions) | Energy | Carolinas | Energy | Progress | Florida | Ohio | Indiana | Piedmont
Confirmed obligations outstanding at December 31, 2022 | $ | 87 |  | $ | 6 |  | $ | 19 |  | $ | 8 |  | $ | 11 |  | $ | 5 |  | $ | — |  | $ | 57 |
Invoices confirmed during the period | 114 |  | 20 |  | 42 |  | 23 |  | 19 |  | 3 |  | — |  | 49 |
Confirmed invoices paid during the period | (161) |  | (21) |  | (47) |  | (19) |  | (28) |  | (6) |  | — |  | (87) |
Confirmed obligations outstanding at June 30, 2023 | $ | 40 |  | $ | 5 |  | $ | 14 |  | $ | 12 |  | $ | 2 |  | $ | 2 |  | $ | — |  | $ | 19 |
Confirmed obligations outstanding at December 31, 2023 | $ | 50 |  | $ | — |  | $ | 3 |  | $ | — |  | $ | 3 |  | $ | — |  | $ | — |  | $ | 47 |
Invoices confirmed during the period | 120 |  | — |  | 1 |  | — |  | 1 |  | — |  | — |  | 119 |
Confirmed invoices paid during the period | (142) |  | — |  | (4) |  | — |  | (4) |  | — |  | — |  | (138) |
Confirmed obligations outstanding at June 30, 2024 | $ | 28 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 28 |

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