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Variable Interest Entities (Schedule of Accounts Receivable Securitizations) (Details) - USD ($) | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Variable Interest Entities [Line Items] |  |
Long-Term Debt | $ 62,196,000,000 | $ 60,448,000,000
Duke Energy Carolinas |  |
Variable Interest Entities [Line Items] |  |
Long-Term Debt | 12,803,000,000 | 12,595,000,000
Duke Energy Progress |  |
Variable Interest Entities [Line Items] |  |
Long-Term Debt | 10,396,000,000 | 9,543,000,000
Duke Energy Florida |  |
Variable Interest Entities [Line Items] |  |
Long-Term Debt | 8,374,000,000 | 8,406,000,000
CRC | VIE primary beneficiary |  |
Variable Interest Entities [Line Items] |  |
Facility size | 350,000,000 |
Long-Term Debt | 350,000,000 | 350,000,000
Accounts receivable from securitization | 566,000,000 | 587,000,000
DERF | Duke Energy Carolinas | VIE primary beneficiary |  |
Variable Interest Entities [Line Items] |  |
Facility size | 475,000,000 |
Long-Term Debt | 499,000,000 | 475,000,000
Accounts receivable from securitization | 858,000,000 | 844,000,000
DEPR | Duke Energy Progress | VIE primary beneficiary |  |
Variable Interest Entities [Line Items] |  |
Facility size | 350,000,000 |
Long-Term Debt | 350,000,000 | 350,000,000
Accounts receivable from securitization | 658,000,000 | 574,000,000
DEFR | Duke Energy Florida | VIE primary beneficiary |  |
Variable Interest Entities [Line Items] |  |
Facility size | 250,000,000 |
Long-Term Debt | 250,000,000 | 250,000,000
Accounts receivable from securitization | $ 503,000,000 | $ 427,000,000

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