XML 132 R92.htm IDEA: XBRL DOCUMENT
v3.25.2

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Indiana) (Details) - IURC - Duke Energy Indiana $ in Millions | Feb. 13, 2025 USD ($) MW | Feb. 07, 2025 USD ($) | Feb. 03, 2025 USD ($) | Apr. 30, 2024 USD ($) | Sep. 20, 2023 | Jun. 15, 2022 USD ($)
--- | --- | --- | --- | --- | --- | ---
Indiana Coal Ash Recovery |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Interest rate on refunds (as a percent) |  |  |  |  | 4.71% |
TDSIG 2.0 |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Future investment in infrastructure |  |  |  |  |  | $ 2,000
2024 Indiana Rate Case |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Future investment in infrastructure |  |  |  | $ 1,600 |  |
Approved return on equity percentage (as a percent) |  |  | 9.75% |  |  |
Equity ratio (as a percent) |  |  | 53.00% |  |  |
Approved rate increase (decrease), amount |  | $ 385 | $ 296 |  |  |
Cayuga Combined Cycle CPCN, Gas-Fired |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
New combustion turbines (in megawatts) | MW | 1,476 |  |  |  |  |
Cayuga Combined Cycle CPCN, Coal-Fired |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
New combustion turbines (in megawatts) | MW | 1,005 |  |  |  |  |
Cayuga Combined Cycle CPCN |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
New combustion turbines (in megawatts) | MW | 471 |  |  |  |  |
Estimated cost of facilities | $ 3,300 |  |  |  |  |
Requested rate increase, percentage, net of tax | 5.40% |  |  |  |  |

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

X
- Definition Public Utilities, Equity Ratio + References No definition available. + Details
Name: | duk_PublicUtilitiesEquityRatio
Namespace Prefix: | duk_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Estimated Cost of Generation Facilities to be Built + References No definition available. + Details
Name: | duk_PublicUtilitiesEstimatedCostOfGenerationFacilitiesToBeBuilt
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Refund Interest Rate Percentage + References No definition available. + Details
Name: | duk_PublicUtilitiesRefundInterestRatePercentage
Namespace Prefix: | duk_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Requested Rate Increase (Decrease), Percentage, Net Of Tax + References No definition available. + Details
Name: | duk_PublicUtilitiesRequestedRateIncreaseDecreasePercentageNetOfTax
Namespace Prefix: | duk_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Utilities, Future Investment in Infrastructure + References No definition available. + Details
Name: | duk_UtilitiesFutureInvestmentInInfrastructure
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

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

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_TDSIG20Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_A2024IndianaRateCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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