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Summary of Significant Accounting Policies (Excise Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	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

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