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Summary of Significant Accounting Policies (Excise Taxes) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Organization And Basis Of Presentation [Line Items] |  |  |
Excise taxes | $ 447 | $ 423 | $ 458
Duke Energy Carolinas |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |
Excise taxes | 27 | 31 | 27
Progress Energy |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |
Excise taxes | 307 | 285 | 322
Duke Energy Progress |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |
Excise taxes | 8 | 9 | 5
Duke Energy Florida |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |
Excise taxes | 299 | 276 | 317
Duke Energy Ohio |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |
Excise taxes | 110 | 105 | 106
Duke Energy Indiana |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |
Excise taxes | 0 | 0 | 1
Piedmont |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |
Excise taxes | $ 3 | $ 2 | $ 2

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- Definition The excise taxes collected by a public utility and reported in revenues if the amount of excise taxes is equal to 1 percent or more of such total. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)(e)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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