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Property, Plant and Equipment (Schedule of Capitalized Interest) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Property, Plant and Equipment [Line Items] |  |  |
Capitalized interest | $ 182 | $ 201 | $ 201
Duke Energy Carolinas |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Capitalized interest | 66 | 61 | 62
Progress Energy |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Capitalized interest | 60 | 57 | 41
Duke Energy Progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Capitalized interest | 53 | 52 | 35
Duke Energy Florida |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Capitalized interest | 7 | 5 | 6
Duke Energy Ohio |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Capitalized interest | 10 | 14 | 16
Duke Energy Indiana |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Capitalized interest | 2 | 13 |
PISCC amortization |  |  | (21)
Piedmont |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Capitalized interest | $ 7 | $ 8 | $ 8

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