Summary of Significant Accounting Policies (Other Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current Liabilities
Organization And Basis Of Presentation [Line Items]
Accrued compensation	$ 778	$ 915
Duke Energy Carolinas | Current Liabilities
Organization And Basis Of Presentation [Line Items]
Accrued compensation	247	277
Duke Energy Progress | Current Liabilities
Organization And Basis Of Presentation [Line Items]
Customer deposits	106	144
Other accrued liabilities	124	163
Duke Energy Florida | Current Liabilities
Organization And Basis Of Presentation [Line Items]
Customer deposits	200	200
Other accrued liabilities	61	89
Duke Energy Ohio | Current Assets
Organization And Basis Of Presentation [Line Items]
Gas Storage	57	25
Duke Energy Ohio | Current Liabilities
Organization And Basis Of Presentation [Line Items]
Collateral liabilities	53	57
Duke Energy Indiana | Current Assets
Organization And Basis Of Presentation [Line Items]
Mark-to-market transactions	$ 110	$ 23