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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]  
Schedule of Current and Noncurrent Assets and Liabilities
The following table provides a description of amounts included in Other within Current Assets or Current Liabilities that exceed 5% of total Current Assets or Current Liabilities on the Duke Energy Registrants' Consolidated Balance Sheets at either December 31, 2024, or 2023.
December 31,
(in millions)Location20242023
Duke Energy Carolinas
Accrued compensation Current Liabilities$234 $224 
Duke Energy Florida  
Tax receivables
Current Assets
$166 $12 
Customer deposits/Collateral liabilities
Current Liabilities$164 $168 
Duke Energy Ohio  
Tax receivables
Current Assets
$4 95 
Duke Energy Indiana  
Customer advances
Current Liabilities
$100 $87 
Schedule of Cash and Cash Equivalents The following table presents the components of cash, cash equivalents and restricted cash included in the Consolidated Balance Sheets.
December 31, 2024December 31, 2023
DukeDukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyDukeEnergyProgressEnergyEnergy
(in millions)
EnergyCarolinasEnergyProgressFloridaEnergyCarolinasEnergyProgressFlorida
Current Assets
Cash and cash equivalents$314 $6 $73 $24 $33 $253 $9 $59 $18 $24 
Other84 9 76 40 35 76 9 67 31 36 
Other Noncurrent Assets
Other20 1 11 5 7 16 1 9 2 7 
Total cash, cash equivalents and restricted cash$418 $16 $160 $69 $75 $345 $19 $135 $51 $67 
Restrictions on Cash and Cash Equivalents The following table presents the components of cash, cash equivalents and restricted cash included in the Consolidated Balance Sheets.
December 31, 2024December 31, 2023
DukeDukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyDukeEnergyProgressEnergyEnergy
(in millions)
EnergyCarolinasEnergyProgressFloridaEnergyCarolinasEnergyProgressFlorida
Current Assets
Cash and cash equivalents$314 $6 $73 $24 $33 $253 $9 $59 $18 $24 
Other84 9 76 40 35 76 9 67 31 36 
Other Noncurrent Assets
Other20 1 11 5 7 16 1 9 2 7 
Total cash, cash equivalents and restricted cash$418 $16 $160 $69 $75 $345 $19 $135 $51 $67 
Components of Inventory The components of inventory are presented in the tables below.
 December 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions) EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Materials and supplies $3,387 $1,150 $1,649 $1,074 $576 $149 $389 $11 
Coal 801 341 241 164 77 23 196 — 
Natural gas, oil and other 321 45 196 103 92 11 1 67 
Total inventory $4,509 $1,536 $2,086 $1,341 $745 $183 $586 $78 
 December 31, 2023
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions) EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Materials and supplies $3,086 $1,075 $1,465 $963 $502 $139 $361 $12 
Coal842 364 231 154 77 28 219 — 
Natural gas, oil and other364 45 205 110 95 12 2 100 
Total inventory $4,292 $1,484 $1,901 $1,227 $674 $179 $582 $112 
Schedule of Property, Plant and Equipment The composite weighted average depreciation rates, excluding nuclear fuel, are included in the table that follows.
 Years Ended December 31,
 202420232022
Duke Energy 3.0 %2.9 %3.0 %
Duke Energy Carolinas 3.1 %2.7 %2.7 %
Progress Energy 3.3 %3.3 %3.2 %
Duke Energy Progress 3.2 %3.1 %3.0 %
Duke Energy Florida 3.5 %3.5 %3.5 %
Duke Energy Ohio 2.9 %2.8 %2.9 %
Duke Energy Indiana 3.6 %3.6 %3.6 %
Piedmont2.2 %2.1 %2.1 %
The following tables summarize the property, plant and equipment for Duke Energy and its subsidiary registrants.
December 31, 2024
Average
RemainingDukeDukeDukeDukeDuke
Useful LifeDukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)(Years)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Land $2,569 $617 $1,134 $535 $599 $258 $144 $391 
Plant – Regulated
Electric generation, distribution and transmission 37137,836 49,547 62,351 35,633 26,718 7,634 18,304 — 
Natural gas transmission and distribution 5815,333 — — — — 4,255 — 11,078 
Other buildings and improvements 412,982 1,256 698 391 307 418 372 238 
Nuclear fuel 3,518 2,003 1,515 1,515 — — — — 
Equipment 133,863 997 1,252 753 499 542 490 170 
Construction in process 7,850 2,735 3,657 1,884 1,773 385 406 405 
Other106,855 1,227 1,953 1,349 594 426 254 498 
Total property, plant and equipment(a)
180,806 58,382 72,560 42,060 30,490 13,918 19,970 12,780 
Total accumulated depreciation – regulated(b)(c)
(55,535)(19,090)(23,586)(15,930)(7,650)(3,674)(6,848)(2,432)
Total accumulated depreciation – other(d)
(1,968)— — — — — — — 
Total net property, plant and equipment $123,303 $39,292 $48,974 $26,130 $22,840 $10,244 $13,122 $10,348 
(a)    Includes finance leases of $670 million, $336 million, $620 million, $512 million, $108 million and $10 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy and Duke Energy Progress amounts are net of $159 million of accumulated amortization of finance leases.
(b)    Includes $1,824 million, $1,010 million, $814 million and $814 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively.
(c)    Includes accumulated amortization of finance leases of $84 million and $4 million at Duke Energy Carolinas and Duke Energy Indiana, respectively.
(d)    Includes accumulated amortization of finance leases of $25 million at Duke Energy.
December 31, 2023
Average
RemainingDukeDukeDukeDukeDuke
Useful LifeDukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)(Years)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Land $2,345 $581 $1,012 $502 $510 $242 $133 $352 
Plant – Regulated
Electric generation, distribution and transmission 40129,985 48,107 57,436 33,171 24,265 7,243 17,199 — 
Natural gas transmission and distribution 5714,130 — — — — 3,993 — 10,137 
Other buildings and improvements 422,887 1,213 677 377 300 421 355 221 
Nuclear fuel 3,303 1,866 1,437 1,437 — — — — 
Equipment 143,409 870 1,104 654 450 474 442 143 
Construction in process 8,372 2,578 3,941 1,661 2,280 427 427 690 
Other126,922 1,455 2,037 1,481 548 410 344 365 
Total property, plant and equipment(a)
171,353 56,670 67,644 39,283 28,353 13,210 18,900 11,908 
Total accumulated depreciation – regulated(b)(c)
(54,323)(19,896)(22,300)(15,227)(7,067)(3,451)(6,501)(2,259)
Total accumulated depreciation – other(d)
(1,715)— — — — — — — 
Total net property, plant and equipment $115,315 $36,774 $45,344 $24,056 $21,286 $9,759 $12,399 $9,649 
(a)    Includes finance leases of $697 million, $335 million, $615 million, $552 million, $63 million, and $10 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $292 million, $119 million and $173 million, respectively, of accumulated amortization of finance leases.
(b)    Includes $1,793 million, $991 million, $802 million and $802 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively.
(c)    Includes accumulated amortization of finance leases of $3 million, $67 million, and $4 million at Duke Energy, Duke Energy Carolinas and Duke Energy Indiana, respectively.
(d)    Includes accumulated amortization of finance leases of $7 million at Duke Energy.
Schedule of Accounts Payable and Supplier Invoices Sold
The following table presents the amounts included within Accounts payable on the Consolidated Balance Sheets sold to the financial institution by our suppliers and the supplier invoices sold to the financial institution under the program included within Net cash provided by operating activities on the Consolidated Statements of Cash Flows as of December 31, 2024, and December 31, 2023.
 For the Years Ended December 31, 2023 and 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions) EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Confirmed obligations outstanding at December 31, 2022
$87 $6 $19 $8 $11 $5 $— $57 
Invoices confirmed during the period
228 24 58 22 36 7 — 139 
Confirmed invoices paid during the period
(265)(30)(74)(30)(44)(12)— (149)
Confirmed obligations outstanding at December 31, 2023
$50 $— $3 $— $3 $— $— $47 
Invoices confirmed during the period
156 — 4 — 4 — — 152 
Confirmed invoices paid during the period
(193)— (6)— (6)— — (187)
Confirmed obligations outstanding at December 31, 2024
$13 $— $1 $— $1 $— $— $12 
Schedule of Excise Taxes Excise taxes accounted for on a gross basis within both Operating Revenues and Property and other taxes in the Consolidated Statements of Operations were as follows.
Years Ended December 31,
(in millions) 202420232022
Duke Energy $423 $458 $449 
Duke Energy Carolinas 31 27 47 
Progress Energy 285 322 290 
Duke Energy Progress 9 5 25 
Duke Energy Florida 276 317 265 
Duke Energy Ohio 105 106 104 
Duke Energy Indiana — 1 7 
Piedmont2 2 1