XML 185 R123.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Regulatory Matters (Duke Energy Carolinas Narrative) (Details) $ in Millions |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 03, 2024 USD ($) | May 17, 2024 USD ($) | Mar. 14, 2024 USD ($) numberOfCombustionTurbines MW | Jan. 04, 2024 | Dec. 15, 2023 | Aug. 22, 2023 USD ($) | Dec. 14, 2027 USD ($) | Dec. 14, 2026 USD ($) | Dec. 14, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 14, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of assets and other charges |  |  |  |  |  |  |  |  |  | $ 38 |  | $ 85 | $ 434
Operation, maintenance and other |  |  |  |  |  |  |  |  |  | 5,389 |  | 5,625 | 5,734
Capital expenditures |  |  |  |  |  |  |  |  |  | 12,263 |  | 12,622 | 11,419
Other Noncurrent Assets: Regulatory assets |  |  |  |  |  |  |  |  |  | 14,254 |  | 13,618 |
Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of assets and other charges |  |  |  |  |  |  |  |  |  | 31 |  | 44 | 26
Operation, maintenance and other |  |  |  |  |  |  |  |  |  | 1,740 |  | 1,774 | 1,892
Capital expenditures |  |  |  |  |  |  |  |  |  | 3,966 |  | 3,733 | 3,304
Other Noncurrent Assets: Regulatory assets |  |  |  |  |  |  |  |  |  | 4,199 |  | 3,916 |
Duke Energy Carolinas | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  |  |  |  |  |  | 34 |  | 32 |
Duke Energy Carolinas | Hurricanes Helene, Debby and Milton |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  |  |  |  |  |  | 583 |  |  |
Duke Energy Carolinas | Minimum | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Storm costs incurred |  |  |  |  |  |  |  |  |  | 612 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  | 402 |  |  |
Duke Energy Carolinas and Duke Energy Progress | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  |  |  |  |  |  | 802 |  | 87 |
Duke Energy Carolinas and Duke Energy Progress | Minimum | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Storm costs incurred |  |  |  |  |  |  |  |  |  | 95 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  | 8 |  |  |
Duke Energy Carolinas and Duke Energy Progress | Minimum | Hurricanes Helene, Debby and Milton |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Storm costs incurred |  |  |  |  |  |  |  |  |  | 860 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  | 548 |  |  |
Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of assets and other charges |  |  |  |  |  |  |  |  |  | 6 |  | 29 | 7
Operation, maintenance and other |  |  |  |  |  |  |  |  |  | 1,388 |  | 1,379 | 1,475
Capital expenditures |  |  |  |  |  |  |  |  |  | 2,803 |  | 2,387 | $ 2,070
Other Noncurrent Assets: Regulatory assets |  |  |  |  |  |  |  |  |  | 4,555 |  | 4,546 |
Duke Energy Progress | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  |  |  |  |  |  | 47 |  | $ 55 |
Duke Energy Progress | Hurricanes Helene, Debby and Milton |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  |  |  |  |  |  | 219 |  |  |
Duke Energy Progress | Minimum | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Storm costs incurred |  |  |  |  |  |  |  |  |  | 248 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  | 146 |  |  |
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
MYRP period (in years) |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Settlement amount |  |  |  |  |  | $ 19,500 |  |  |  |  |  |  |
Impairment of assets and other charges |  |  |  |  |  |  |  |  |  | 29 |  |  |
Operation, maintenance and other |  |  |  |  |  |  |  |  |  | 8 |  |  |
Approved rate increase (decrease) amount by state commission |  |  |  |  |  |  |  |  |  |  | $ 436 |  |
Approved return on equity (as a percent) |  |  |  |  | 10.10% |  |  |  |  |  |  |  |
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas | Equity |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved return on equity (as a percent) |  |  |  |  | 53.00% |  |  |  |  |  |  |  |
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved rate increase (decrease) amount by state commission |  |  |  |  |  |  | $ 768 | $ 158 | $ 174 |  |  |  |
2023 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement amount |  |  |  |  |  | $ 4,600 |  |  |  |  |  |  |
2024 South Carolina Rate Case | PSCSC | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement amount | $ 7,400 |  |  |  |  |  |  |  |  |  |  |  |
Impairment of assets and other charges |  |  |  |  |  |  |  |  |  | 33 |  |  |
Operation, maintenance and other |  |  |  |  |  |  |  |  |  | 2 |  |  |
Approved rate increase (decrease) amount by state commission | $ 150 | $ 240 |  |  |  |  |  |  |  |  |  |  |
Approved return on equity (as a percent) |  | 9.94% |  |  |  |  |  |  |  |  |  |  |
Customer giveback |  | $ 84 |  |  |  |  |  |  |  |  |  |  |
Approved capital structure (as a percent) |  | 51.21% |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  | $ 11 |  |  |
Proposed rate period (in years) |  |  |  | 2 years |  |  |  |  |  |  |  |  |
Marshall Combustion Turbines CPCN Proceedings | NCUC | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  | $ 104 |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease), percent |  |  | 2.20% |  |  |  |  |  |  |  |  |  |
Hydrogen-Capable Advanced-Class Simple-Cycle Combustion Turbines, Number | numberOfCombustionTurbines |  |  | 2 |  |  |  |  |  |  |  |  |  |
Winter rating, combustion turbines | MW |  |  | 850 |  |  |  |  |  |  |  |  |  |

X
- Definition Hydrogen-Capable Advanced-Class Simple-Cycle Combustion Turbines, Number + References No definition available. + Details
Name: | duk_HydrogenCapableAdvancedClassSimpleCycleCombustionTurbinesNumber
Namespace Prefix: | duk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Impairment Of Assets And Other Charges + References No definition available. + Details
Name: | duk_ImpairmentOfAssetsAndOtherCharges
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total expenditures for long-lived assets additions other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment; if the amount: (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets. + References No definition available. + Details
Name: | duk_NoncurrentAssetAdditions
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Combustion Turbines, in Megawatts + References No definition available. + Details
Name: | duk_PublicUtilitiesCombustionTurbinesInMegawatts
Namespace Prefix: | duk_
Data Type: | dtr-types1:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Customer Giveback + References No definition available. + Details
Name: | duk_PublicUtilitiesCustomerGiveback
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Proposed Rate, Period + References No definition available. + Details
Name: | duk_PublicUtilitiesProposedRatePeriod
Namespace Prefix: | duk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Settlement Rate, Amount + References No definition available. + Details
Name: | duk_PublicUtilitiesSettlementRateAmount
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Settlement Rate, Period + References No definition available. + Details
Name: | duk_PublicUtilitiesSettlementRatePeriod
Namespace Prefix: | duk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of interest expense classified as nonoperating. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_InterestExpenseNonoperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 720 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483359/720-20-50-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 27 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482395/460-10-55-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-9 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-4 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-3 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-2 + Details
Name: | us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of public utility's approved equity to capital, including debt and equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedEquityCapitalStructurePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of public utility's approved rate increase (decrease) by regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of public utility's approved return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of public utility's requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of public utility's requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreasePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 + Details
Name: | us-gaap_RegulatoryAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of operating expenses for the period that are associated with the utility's normal revenue producing operation; including selling, general, and administrative expenses, costs incurred for routine plant repairs and maintenance, and operations. + References No definition available. + Details
Name: | us-gaap_UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyCarolinasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnusualOrInfrequentItemAxis=us-gaap_NaturalDisastersAndOtherCasualtyEventsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnusualOrInfrequentItemAxis=duk_HurricanesHeleneDebbyAndMiltonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyCarolinasandDukeEnergyProgressMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyProgressMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_A2023NorthCarolinaRateCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=duk_NCUCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_EquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_A2023NorthCarolinaRateCaseRetailAllocatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_A2024SouthCarolinaRateCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=duk_PSCSCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_MarshallCombustionTurbinesCPCNProceedingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |