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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

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