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Variable Interest Entities (Consolidated VIEs) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Variable Interest Entity Consolidated Carrying Amount, Assets and Liabilities, Net [Abstract] |  |
Regulatory Assets: Current | $ 1,796 | $ 2,005
Current Assets: Other | 764 | 1,049
Property, Plant and Equipment: Cost | 147,654 | 134,458
Accumulated depreciation and amortization | (45,773) | (43,126)
Other Noncurrent Assets: Regulatory assets | 13,222 | 13,617
Other Noncurrent Assets: Other | 3,289 | 2,935
Current Liabilities: Other | 2,367 | 2,085
Current maturities of long-term debt | 3,141 | 3,406
Long-Term Debt | 54,985 | 51,123
Asset retirement obligations | 12,437 | 9,548
Other Noncurrent Liabilities: Other | 1,581 | 1,650
Duke Energy Florida |  |
Variable Interest Entity Consolidated Carrying Amount, Assets and Liabilities, Net [Abstract] |  |
Regulatory Assets: Current | 419 | 434
Current Assets: Other | 58 | 46
Property, Plant and Equipment: Cost | 20,457 | 18,792
Accumulated depreciation and amortization | (5,236) | (4,968)
Other Noncurrent Assets: Regulatory assets | 2,194 | 2,454
Other Noncurrent Assets: Other | 311 | 311
Current Liabilities: Other | 415 | 406
Current maturities of long-term debt | 571 | 270
Long-Term Debt | 7,416 | 7,051
Asset retirement obligations | 578 | 586
Other Noncurrent Liabilities: Other | 136 | 93
DEFPF | Duke Energy Florida | VIE |  |
Variable Interest Entity Consolidated Carrying Amount, Assets and Liabilities, Net [Abstract] |  |
Receivables of VIEs | 5 | 5
Regulatory Assets: Current | 52 | 52
Current Assets: Other | 39 | 39
Other Noncurrent Assets: Regulatory assets | 989 | 1,041
Current Liabilities: Other | 10 | 10
Current maturities of long-term debt | 54 | 53
Long-Term Debt | 1,057 | 1,111
Commercial Renewables | VIE |  |
Variable Interest Entity Consolidated Carrying Amount, Assets and Liabilities, Net [Abstract] |  |
Current Assets: Other | 203 | 123
Property, Plant and Equipment: Cost | 5,747 | 4,007
Accumulated depreciation and amortization | (1,041) | (698)
Other Noncurrent Assets: Other | 106 | 261
Current maturities of long-term debt | 162 | 174
Long-Term Debt | 1,541 | 1,587
Asset retirement obligations | 127 | 106
Other Noncurrent Liabilities: Other | $ 228 | $ 212

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