Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Line of Credit Facility [Line Items]
Tax-exempt bonds	$ (1,331,000,000)	$ (1,331,000,000)
Duke Energy Progress
Line of Credit Facility [Line Items]
Tax-exempt bonds	(500,000,000)	(500,000,000)
Duke Energy Ohio
Line of Credit Facility [Line Items]
Tax-exempt bonds	(77,000,000)	(77,000,000)
Duke Energy Indiana
Line of Credit Facility [Line Items]
Tax-exempt bonds	(352,000,000)	$ (352,000,000)
Revolving Credit Facility
Line of Credit Facility [Line Items]
Facility size	9,000,000,000		$ 9,000,000,000
Commercial paper	(3,143,000,000)
Outstanding letters of credit	(18,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity	5,758,000,000
Revolving Credit Facility | Duke Energy Carolinas
Line of Credit Facility [Line Items]
Facility size	1,400,000,000
Commercial paper	(300,000,000)
Outstanding letters of credit	(4,000,000)
Available capacity	1,096,000,000
Revolving Credit Facility | Duke Energy Progress
Line of Credit Facility [Line Items]
Facility size	1,500,000,000
Commercial paper	(736,000,000)
Outstanding letters of credit	(1,000,000)
Available capacity	763,000,000
Revolving Credit Facility | Duke Energy Florida
Line of Credit Facility [Line Items]
Facility size	875,000,000
Commercial paper	(448,000,000)
Outstanding letters of credit	(7,000,000)
Available capacity	420,000,000
Revolving Credit Facility | Duke Energy Ohio
Line of Credit Facility [Line Items]
Facility size	1,050,000,000
Commercial paper	(182,000,000)
Available capacity	868,000,000
Revolving Credit Facility | Duke Energy Indiana
Line of Credit Facility [Line Items]
Facility size	950,000,000
Commercial paper	(160,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity	709,000,000
Revolving Credit Facility | Piedmont
Line of Credit Facility [Line Items]
Facility size	950,000,000
Commercial paper	(709,000,000)
Available capacity	241,000,000
Revolving Credit Facility | Parent Company
Line of Credit Facility [Line Items]
Facility size	2,275,000,000
Commercial paper	(608,000,000)
Outstanding letters of credit	(6,000,000)
Available capacity	1,661,000,000
Revolving Credit Facility | Parent Company | Proceeds Loaned To Subsidiary Registrants
Line of Credit Facility [Line Items]
Commercial paper	$ (625,000,000)