XML 94 R55.htm IDEA: XBRL DOCUMENT
v3.23.2

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Progress) (Details) - Duke Energy Progress - USD ($) $ in Millions |  |  | 6 Months Ended | 7 Months Ended | 10 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 06, 2022 | Sep. 01, 2022 | Dec. 31, 2025 | Dec. 31, 2025 | Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2024 | May 31, 2027 | May 31, 2026 | May 31, 2025 | May 31, 2024
2022 North Carolina Rate Case | NCUC |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proposed rate period (in years) | 3 years |  |  |  |  |  |  |  |  |  |
2022 North Carolina Rate Case | NCUC | Forecast |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease), amount |  |  | $ 587 | $ 615 | $ 140 | $ 127 |  |  | $ 138 | $ 151 |
Requested return on equity (as a percent) |  |  | 15.00% |  |  |  |  | 16.00% |  |  |
2022 North Carolina Rate Case | NCUC | Forecast | Subsequent event |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease), amount |  |  |  |  |  |  | $ 320 |  |  |  | $ 326
2022 South Carolina Rate Case | PSCSC |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Approved rate increase (decrease), amount |  | $ 52 |  |  |  |  |  |  |  |  |
2022 South Carolina Rate Case, Retail Rate Case | PSCSC |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Approved rate increase (decrease), amount |  | $ 36 |  |  |  |  |  |  |  |  |
Approved return on equity percentage (as a percent) |  | 9.60% |  |  |  |  |  |  |  |  |
2022 South Carolina Rate Case, Retail Rate Case | PSCSC | Equity |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Approved return on equity percentage (as a percent) |  | 52.43% |  |  |  |  |  |  |  |  |
2022 South Carolina Rate Case, Retail Rate Case | PSCSC | Debt |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Approved return on equity percentage (as a percent) |  | 47.57% |  |  |  |  |  |  |  |  |
2022 South Carolina Rate Case, Coal Ash Basin Closure Costs | PSCSC |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Deferred compliance costs period (in years) |  | 7 years |  |  |  |  |  |  |  |  |
Deferred compliance costs |  | $ 50 |  |  |  |  |  |  |  |  |

X
- Definition Public Utilities, Deferred Compliance Costs, Non-Recovery + References No definition available. + Details
Name: | duk_PublicUtilitiesDeferredComplianceCostsNonRecovery
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Deferred Compliance Costs, Recovery Period + References No definition available. + Details
Name: | duk_PublicUtilitiesDeferredComplianceCostsRecoveryPeriod
Namespace Prefix: | duk_
Data Type: | xbrli:durationItemType
Balance Type: | na
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 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 return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_A2022NorthCarolinaRateCaseMember
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: | dei_LegalEntityAxis=duk_DukeEnergyProgressMember
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_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_A2022SouthCarolinaRateCaseMember
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_A2022SouthCarolinaRateCaseRetailRateCaseMember
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: | us-gaap_BalanceSheetLocationAxis=us-gaap_DebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_A2022SouthCarolinaRateCaseCoalAshBasinClosureCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |