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Variable Interest Entities (Schedule of Accounts Receivable Securitizations) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Variable Interest Entity [Line Items] |  |
Long-Term Debt | $ 54,985 | $ 51,123
Duke Energy Carolinas |  |
Variable Interest Entity [Line Items] |  |
Long-Term Debt | 11,142 | 10,633
Duke Energy Progress |  |
Variable Interest Entity [Line Items] |  |
Long-Term Debt | 7,902 | 7,451
Duke Energy Florida |  |
Variable Interest Entity [Line Items] |  |
Long-Term Debt | $ 7,416 | 7,051
CRC | VIE |  |
Variable Interest Entity [Line Items] |  |
Expiration date | Dec. 01, 2020 |
Facility Size | $ 350 |
Long-Term Debt | 350 | 325
Restricted Receivables | $ 522 | 564
DERF | Duke Energy Carolinas | VIE |  |
Variable Interest Entity [Line Items] |  |
Expiration date | Dec. 01, 2022 |
Facility Size | $ 475 |
Long-Term Debt | 474 | 450
Restricted Receivables | $ 642 | 699
DEPR | Duke Energy Progress | VIE |  |
Variable Interest Entity [Line Items] |  |
Expiration date | Feb. 01, 2021 |
Facility Size | $ 325 |
Long-Term Debt | 325 | 300
Restricted Receivables | $ 489 | 547
DEFR | Duke Energy Florida | VIE |  |
Variable Interest Entity [Line Items] |  |
Expiration date | Apr. 01, 2021 |
Facility Size | $ 250 |
Long-Term Debt | 250 | 225
Restricted Receivables | $ 336 | $ 357

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