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Organization and Basis of Presentation (Schedule of Cash and Cash Equivalents) (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Current Assets |  |  |  |
Cash and cash equivalents | $ 344 | $ 314 |  |
Other Noncurrent Assets |  |  |  |
Total cash, cash equivalents and restricted cash | 442 | 421 | $ 483 | $ 357
Duke Energy (Parent) |  |  |  |
Current Assets |  |  |  |
Cash and cash equivalents | 344 | 314 |  |
Other | 75 | 84 |  |
Other Noncurrent Assets |  |  |  |
Other | 23 | 20 |  |
Total cash, cash equivalents and restricted cash | 442 | 418 |  |
Duke Energy Carolinas |  |  |  |
Current Assets |  |  |  |
Cash and cash equivalents | 7 | 6 |  |
Other | 9 | 9 |  |
Other Noncurrent Assets |  |  |  |
Other | 1 | 1 |  |
Total cash, cash equivalents and restricted cash | 17 | 16 | 20 | 19
Progress Energy |  |  |  |
Current Assets |  |  |  |
Cash and cash equivalents | 58 | 73 |  |
Other | 66 | 76 |  |
Other Noncurrent Assets |  |  |  |
Other | 11 | 11 |  |
Total cash, cash equivalents and restricted cash | 135 | 160 | 160 | 135
Duke Energy Progress |  |  |  |
Current Assets |  |  |  |
Cash and cash equivalents | 24 | 24 |  |
Other | 37 | 40 |  |
Other Noncurrent Assets |  |  |  |
Other | 5 | 5 |  |
Total cash, cash equivalents and restricted cash | 66 | 69 | 70 | 51
Duke Energy Florida |  |  |  |
Current Assets |  |  |  |
Cash and cash equivalents | 16 | 33 |  |
Other | 28 | 35 |  |
Other Noncurrent Assets |  |  |  |
Other | 7 | 7 |  |
Total cash, cash equivalents and restricted cash | $ 51 | $ 75 | $ 73 | $ 67

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