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Revenue (Unbilled Revenues) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | $ 1,457 | $ 922
Duke Energy Carolinas |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | 486 | 316
Progress Energy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | 355 | 266
Duke Energy Progress |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | 232 | 193
Duke Energy Florida |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | 123 | 73
Duke Energy Ohio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | 20 | 4
Duke Energy Ohio | CRC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | 148 | 82
Duke Energy Indiana |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | 28 | 27
Duke Energy Indiana | CRC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | 260 | 121
Piedmont |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unbilled receivables | $ 160 | $ 106

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