XML 160 R104.htm IDEA: XBRL DOCUMENT
v3.20.4

Property, Plant and Equipment (Schedule Of Property, Plant and Equipment) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Equipment, estimated useful life, years | 15 years | 13 years |
Land | $ 2,046 | $ 2,091 |
Other buildings and improvements | 5,090 | 4,916 |
Equipment | 2,608 | 2,313 |
Construction in process | 6,645 | 6,102 |
Total property, plant and equipment | 155,580 | 147,654 |
Generation facilities to be retired, net | 29 | 246 |
Total net property, plant and equipment | $ 106,782 | $ 102,127 |
Other, estimated useful life, in years | 14 years | 13 years |
Finance leases, gross | $ 832 | $ 952 |
Net property, plant and equipment | 797 | 926 |
Accumulated amortization of finance leases | 12 | 6 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 112 | 159 | $ 161
Nuclear fuel |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Nuclear fuel | 3,284 | 3,253 |
Accumulated depreciation and amortization | (1,832) | (1,807) |
Consolidated VIEs |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Total property, plant and equipment | 6,394 | 5,747 |
Accumulated depreciation and amortization | (1,242) | (1,041) |
Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | $ (46,216) | $ (43,419) |
Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Equipment, estimated useful life, years | 39 years | 39 years |
Plant - transmission and distribution | $ 117,107 | $ 111,739 |
Regulated | Natural gas transmission and distribution |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Equipment, estimated useful life, years | 54 years | 54 years |
Plant - transmission and distribution | $ 10,799 | $ 9,839 |
Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Equipment, estimated useful life, years | 36 years | 32 years |
Other buildings and improvements | $ 2,038 | $ 1,810 |
Nonregulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (2,611) | (2,354) |
Accumulated amortization of finance leases | $ 23 | $ 20 |
Nonregulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Equipment, estimated useful life, years | 27 years | 28 years |
Plant - transmission and distribution | $ 5,444 | $ 5,103 |
Nonregulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Equipment, estimated useful life, years | 10 years | 9 years |
Other buildings and improvements | $ 519 | $ 488 |
Duke Energy Carolinas |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 536 | 520 |
Other buildings and improvements | 1,203 | 1,139 |
Equipment | 620 | 546 |
Construction in process | 1,645 | 1,389 |
Total property, plant and equipment | 50,640 | 48,922 |
Total net property, plant and equipment | 33,187 | 32,397 |
Finance leases, gross | 335 | 211 |
Net property, plant and equipment | 312 | 198 |
Accumulated amortization of finance leases | 23 | 13 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 28 | 30 | 35
Duke Energy Carolinas | Nuclear fuel |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Nuclear fuel | 1,837 | 1,891 |
Accumulated depreciation and amortization | (1,010) | (1,082) |
Duke Energy Carolinas | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (17,453) | (16,525) |
Duke Energy Carolinas | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 44,059 | 42,723 |
Duke Energy Carolinas | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 740 | 714 |
Progress Energy |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 908 | 884 |
Other buildings and improvements | 1,521 | 1,467 |
Equipment | 759 | 665 |
Construction in process | 2,013 | 2,149 |
Total property, plant and equipment | 57,892 | 55,070 |
Generation facilities to be retired, net | 29 | 246 |
Total net property, plant and equipment | 39,553 | 38,157 |
Net property, plant and equipment | 416 | 443 |
Accumulated amortization of finance leases | 141 | 143 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 17 | 31 | 51
Progress Energy | Nuclear fuel |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Nuclear fuel | 1,447 | 1,362 |
Accumulated depreciation and amortization | (822) | (725) |
Progress Energy | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (18,368) | (17,159) |
Progress Energy | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 50,785 | 48,142 |
Progress Energy | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 459 | 401 |
Duke Energy Progress |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 463 | 449 |
Other buildings and improvements | 1,070 | 1,046 |
Equipment | 498 | 452 |
Construction in process | 709 | 1,114 |
Total property, plant and equipment | 35,759 | 34,603 |
Generation facilities to be retired, net | 29 | 246 |
Total net property, plant and equipment | 22,987 | 22,934 |
Net property, plant and equipment | 297 | 308 |
Accumulated amortization of finance leases | 24 | 17 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 12 | 28 | 26
Duke Energy Progress | Nuclear fuel |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Nuclear fuel | 1,447 | 1,362 |
Accumulated depreciation and amortization | (822) | (725) |
Duke Energy Progress | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (12,801) | (11,915) |
Duke Energy Progress | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 31,375 | 30,018 |
Duke Energy Progress | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 197 | 162 |
Duke Energy Florida |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 445 | 435 |
Other buildings and improvements | 441 | 411 |
Equipment | 261 | 213 |
Construction in process | 1,304 | 1,035 |
Total property, plant and equipment | 22,123 | 20,457 |
Total net property, plant and equipment | 16,563 | 15,221 |
Net property, plant and equipment | 119 | 135 |
Accumulated amortization of finance leases | 117 | 126 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 5 | 3 | 25
Duke Energy Florida | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (5,560) | (5,236) |
Duke Energy Florida | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 19,410 | 18,124 |
Duke Energy Florida | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 262 | 239 |
Duke Energy Ohio |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 171 | 150 |
Other buildings and improvements | 294 | 269 |
Equipment | 385 | 319 |
Construction in process | 407 | 504 |
Total property, plant and equipment | 11,022 | 10,241 |
Total net property, plant and equipment | 8,009 | 7,398 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 26 | 22 | 17
Duke Energy Ohio | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (3,013) | (2,843) |
Duke Energy Ohio | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 6,255 | 5,838 |
Duke Energy Ohio | Regulated | Natural gas transmission and distribution |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 3,136 | 2,892 |
Duke Energy Ohio | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 374 | 269 |
Duke Energy Indiana |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 118 | 117 |
Other buildings and improvements | 309 | 292 |
Equipment | 238 | 205 |
Construction in process | 409 | 381 |
Total property, plant and equipment | 17,382 | 16,305 |
Total net property, plant and equipment | 11,721 | 11,072 |
Finance leases, gross | 10 | 10 |
Net property, plant and equipment | 7 | 7 |
Accumulated amortization of finance leases | 3 | 3 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 10 | 26 | 27
Duke Energy Indiana | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (5,661) | (5,233) |
Duke Energy Indiana | Regulated | Electric generation, distribution and transmission |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 16,008 | 15,032 |
Duke Energy Indiana | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | 300 | 278 |
Piedmont |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Land | 279 | 388 |
Other buildings and improvements | 324 | 304 |
Equipment | 122 | 128 |
Construction in process | 581 | 531 |
Total property, plant and equipment | 9,134 | 8,446 |
Total net property, plant and equipment | 7,385 | 6,765 |
Capitalized Interest Costs [Abstract] |  |  |
Capitalized interest | 8 | 26 | $ 17
Piedmont | Regulated |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Accumulated depreciation and amortization | (1,749) | (1,681) |
Piedmont | Regulated | Natural gas transmission and distribution |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Plant - transmission and distribution | 7,663 | 6,947 |
Piedmont | Regulated | Other buildings and improvements |  |  |
Public Utilities, Property, Plant and Equipment, Net [Abstract] |  |  |
Other buildings and improvements | $ 165 | $ 148 |

X
- Definition Generation facilities to be retired, net + References No definition available. + Details
Name: | duk_GenerationFacilitiesToBeRetiredNet
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
Name: | us-gaap_FinanceLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated amortization of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 + Details
Name: | us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
Name: | us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InterestCostsIncurredCapitalizedAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PropertyPlantAndEquipmentGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount capitalized of allowance for funds used during construction. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501569&loc=d3e55921-110430 + Details
Name: | us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Period end amount of construction work in progress in public utility. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Period end book value of equipment owned (but not classified elsewhere) by the public utility. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of other equipment owned by public utility, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period end amount of property, plant and equipment (PPE) related to fuels owned by the public utility. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentFuel
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Period end book value of land owned by the public utility. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentLand
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period end book value of other property, plant and equipment (PPE) owned (but not classified elsewhere) by the public utility. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of other property, plant and equipment (PPE) owned by public utility, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period end amount of property, plant and equipment (PPE) related to transmission and distribution owned by public utility. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

X
- Details
Name: | us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap_RegulatedOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap_UnregulatedOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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