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Joint Ownership of Generating and Transmission Facilities (Schedule Joint Ownership of Generating and Transmission Facilities) (Details) $ in Millions | Dec. 31, 2020 USD ($)
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Duke Energy Carolinas | Catawba (units 1 and 2) |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership interest | 19.25%
Property, plant, and equipment | $ 1,017
Accumulated depreciation | 518
Construction work in progress | $ 23
Duke Energy Carolinas | W.S. Lee CC |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership interest | 87.27%
Property, plant, and equipment | $ 632
Accumulated depreciation | 49
Construction work in progress | $ 1
Duke Energy Indiana | Gibson (unit 5) |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership interest | 50.05%
Property, plant, and equipment | $ 447
Accumulated depreciation | 199
Construction work in progress | $ 4
Duke Energy Indiana | Vermillion |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership interest | 62.50%
Property, plant, and equipment | $ 174
Accumulated depreciation | 101
Construction work in progress | 1
Duke Energy Indiana | Transmission and local facilities |
Jointly Owned Utility Plant Interests [Line Items] |
Property, plant, and equipment | 5,817
Accumulated depreciation | 1,508
Construction work in progress | $ 150

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- Definition The period end amount of construction work in progress at a jointly owned electricity generation plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -URI http://asc.fasb.org/extlink&oid=115995737&loc=d3e659983-123033 + Details
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- Definition The period end amount of accumulated depreciation in a jointly owned electricity generation plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -URI http://asc.fasb.org/extlink&oid=115995737&loc=d3e659983-123033 + Details
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- Definition The proportionate share of interest (percent) in a jointly owned utility plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -URI http://asc.fasb.org/extlink&oid=115995737&loc=d3e659983-123033 + Details
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