XML 235 R173.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Fair Value Measurements (Quantitative Level 3 Fair Value Disclosure) (Details) $ in Millions | Dec. 31, 2024 USD ($) $ / MWh | Dec. 31, 2023 USD ($) $ / MWh | Dec. 31, 2022 USD ($)
--- | --- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value | $ | $ 9 | $ 15 | $ 34
Duke Energy Ohio | FTR price – per MWh | RTO auction pricing |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value | $ | $ 1 | $ 2 |
Duke Energy Ohio | FTR price – per MWh | Minimum | RTO auction pricing |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Input measurement (in usd per MWh and usd per MMBtu) |  | 0.36 |
Duke Energy Ohio | FTR price – per MWh | Maximum | RTO auction pricing |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Input measurement (in usd per MWh and usd per MMBtu) | 1.13 | 2.11 |
Duke Energy Ohio | FTR price – per MWh | Weighted Average | RTO auction pricing |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Input measurement (in usd per MWh and usd per MMBtu) | 0.48 | 0.71 |
Duke Energy Indiana |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value | $ | $ 8 | $ 13 | $ 29
Duke Energy Indiana | FTR price – per MWh | RTO auction pricing |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value | $ | $ 8 | $ 13 |
Duke Energy Indiana | FTR price – per MWh | Minimum | RTO auction pricing |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Input measurement (in usd per MWh and usd per MMBtu) | (0.63) | (1.05) |
Duke Energy Indiana | FTR price – per MWh | Maximum | RTO auction pricing |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Input measurement (in usd per MWh and usd per MMBtu) | 9.24 | 9.64 |
Duke Energy Indiana | FTR price – per MWh | Weighted Average | RTO auction pricing |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Input measurement (in usd per MWh and usd per MMBtu) | 0.94 | 1.26 |

X
- Definition Value of input used to measure net derivative asset (liability). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_DerivativeAssetLiabilityNetMeasurementInput
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=duk_DerivativeFinancialInstrumentsLiabilitiesFinancialTransmissionRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_MarketApproachValuationTechniqueMember
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: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
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: |