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v3.25.1

Organization and Basis of Presentation (Schedule of Inventory) (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Public Utilities, Inventory [Line Items] |  |
Total inventory | $ 4,418 | $ 4,509
Duke Energy (Parent) |  |
Public Utilities, Inventory [Line Items] |  |
Materials and supplies | 3,413 | 3,387
Coal | 700 | 801
Natural gas, oil and other fuel | 305 | 321
Total inventory | 4,418 | 4,509
Duke Energy Carolinas |  |
Public Utilities, Inventory [Line Items] |  |
Materials and supplies | 1,133 | 1,150
Coal | 309 | 341
Natural gas, oil and other fuel | 46 | 45
Total inventory | 1,488 | 1,536
Progress Energy |  |
Public Utilities, Inventory [Line Items] |  |
Materials and supplies | 1,677 | 1,649
Coal | 233 | 241
Natural gas, oil and other fuel | 197 | 196
Total inventory | 2,107 | 2,086
Duke Energy Progress |  |
Public Utilities, Inventory [Line Items] |  |
Materials and supplies | 1,090 | 1,074
Coal | 137 | 164
Natural gas, oil and other fuel | 106 | 103
Total inventory | 1,333 | 1,341
Duke Energy Florida |  |
Public Utilities, Inventory [Line Items] |  |
Materials and supplies | 586 | 576
Coal | 96 | 77
Natural gas, oil and other fuel | 91 | 92
Total inventory | 773 | 745
Duke Energy Ohio |  |
Public Utilities, Inventory [Line Items] |  |
Materials and supplies | 155 | 149
Coal | 18 | 23
Natural gas, oil and other fuel | 11 | 11
Total inventory | 184 | 183
Duke Energy Indiana |  |
Public Utilities, Inventory [Line Items] |  |
Materials and supplies | 399 | 389
Coal | 140 | 196
Natural gas, oil and other fuel | 2 | 1
Total inventory | 541 | 586
Piedmont |  |
Public Utilities, Inventory [Line Items] |  |
Materials and supplies | 12 | 11
Coal | 0 | 0
Natural gas, oil and other fuel | 49 | 67
Total inventory | $ 61 | $ 78

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