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Variable Interest Entities (Sales and Cash Flows) (Details) - Non-consolidated VIEs - Cinergy Receivables [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Duke Energy Ohio
Variable Interest Entity [Line Items]
Receivables sold	$ 474	$ 2,578
Loss recognized on sale	7	34
Cash proceeds from receivables sold	478	2,591
Collection fees received		1
Return received on retained interests	4	19
Duke Energy Indiana
Variable Interest Entity [Line Items]
Receivables sold	473	3,223
Loss recognized on sale	6	39
Cash proceeds from receivables sold	523	3,294
Collection fees received		2
Return received on retained interests	$ 4	$ 25

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