Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - USD ($)	Dec. 31, 2022	Mar. 31, 2022	Mar. 01, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Tax-exempt bonds	$ (1,331,000,000)			$ (360,000,000)
Duke Energy Progress
Line of Credit Facility [Line Items]
Tax-exempt bonds	(500,000,000)			(48,000,000)
Duke Energy Ohio
Line of Credit Facility [Line Items]
Tax-exempt bonds	(77,000,000)			(27,000,000)
Duke Energy Indiana
Line of Credit Facility [Line Items]
Tax-exempt bonds	(352,000,000)			$ (285,000,000)
Revolving Credit Facility
Line of Credit Facility [Line Items]
Facility size	9,000,000,000	$ 9,000,000,000	$ 8,000,000,000
Commercial paper	(3,685,000,000)
Outstanding letters of credit	(40,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity	5,194,000,000
Revolving Credit Facility | Parent Company
Line of Credit Facility [Line Items]
Facility size	2,375,000,000
Commercial paper	463,000,000
Outstanding letters of credit	(27,000,000)
Available capacity	2,811,000,000
Revolving Credit Facility | Duke Energy Carolinas
Line of Credit Facility [Line Items]
Facility size	1,925,000,000
Commercial paper	(1,533,000,000)
Outstanding letters of credit	(4,000,000)
Available capacity	388,000,000
Revolving Credit Facility | Duke Energy Progress
Line of Credit Facility [Line Items]
Facility size	800,000,000
Commercial paper	(389,000,000)
Outstanding letters of credit	(2,000,000)
Available capacity	409,000,000
Revolving Credit Facility | Duke Energy Florida
Line of Credit Facility [Line Items]
Facility size	1,150,000,000
Commercial paper	(605,000,000)
Outstanding letters of credit	(7,000,000)
Available capacity	538,000,000
Revolving Credit Facility | Duke Energy Ohio
Line of Credit Facility [Line Items]
Facility size	900,000,000
Commercial paper	(522,000,000)
Available capacity	378,000,000
Revolving Credit Facility | Duke Energy Indiana
Line of Credit Facility [Line Items]
Facility size	1,050,000,000
Commercial paper	(585,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity	384,000,000
Revolving Credit Facility | Piedmont
Line of Credit Facility [Line Items]
Facility size	800,000,000
Commercial paper	(514,000,000)
Available capacity	286,000,000
Proceeds Loaned To Subsidiary Registrants | Revolving Credit Facility | Parent Company
Line of Credit Facility [Line Items]
Commercial paper	$ (625,000,000)