XML 98 R58.htm IDEA: XBRL DOCUMENT
v3.20.2

Regulatory Matters (Schedule of Net Carrying Value Of Facilities and Megawatt Capacity) (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 USD ($) MW | Dec. 31, 2019 USD ($)
Public Utilities, General Disclosures [Line Items] |  |
Public utilities, property, plant and equipment, net | $ 105,760 | $ 102,127
Duke Energy Carolinas |  |
Public Utilities, General Disclosures [Line Items] |  |
Public utilities, property, plant and equipment, net | 33,216 | 32,397
Duke Energy Progress |  |
Public Utilities, General Disclosures [Line Items] |  |
Public utilities, property, plant and equipment, net | 22,960 | 22,934
Duke Energy Indiana |  |
Public Utilities, General Disclosures [Line Items] |  |
Public utilities, property, plant and equipment, net | $ 11,644 | $ 11,072
Generation facilities to be retired |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 8,178 |
Public utilities, property, plant and equipment, net | $ 4,706 |
Generation facilities to be retired | Duke Energy Carolinas | Allen Steam Station Units 1-3 |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 582 |
Public utilities, property, plant and equipment, net | $ 141 |
Generation facilities to be retired | Duke Energy Carolinas | Allen Steam Station Units 4-5 |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 516 |
Public utilities, property, plant and equipment, net | $ 321 |
Generation facilities to be retired | Duke Energy Carolinas | Cliffside Unit 5 |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 544 |
Public utilities, property, plant and equipment, net | $ 355 |
Generation facilities to be retired | Duke Energy Progress | Mayo Unit 1 |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 727 |
Public utilities, property, plant and equipment, net | $ 673 |
Generation facilities to be retired | Duke Energy Progress | Roxboro Units 3-4 |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 1,392 |
Public utilities, property, plant and equipment, net | $ 486 |
Generation facilities to be retired | Duke Energy Indiana | Gallagher Units 2 and 4 |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 280 |
Public utilities, property, plant and equipment, net | $ 112 |
Generation facilities to be retired | Duke Energy Indiana | Gibson Units 1-5 |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 3,132 |
Public utilities, property, plant and equipment, net | $ 1,683 |
Generation facilities to be retired | Duke Energy Indiana | Cayuga Units 1-2 |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 1,005 |
Public utilities, property, plant and equipment, net | $ 935 |

X
- Definition Coal-Fired Generation Capacity, in Megawatts + References No definition available. + Details
Name: | duk_CoalFiredGenerationCapacityPotentialPlantsToBeRetiredInMegawatts
Namespace Prefix: | duk_
Data Type: | num:powerItemType
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 Period end amount of total net PPE. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=duk_GenerationFacilitiesToBeRetiredMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=duk_AllenSteamStationUnits13Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=duk_AllenSteamStationUnits45Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=duk_CliffsideUnit5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=duk_MayoUnit1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=duk_RoxboroUnits34Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=duk_GallagherUnits2and4Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=duk_GibsonUnits1Through5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=duk_CayugaUnits1And2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |