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Joint Ownership of Generating and Transmission Facilities (Schedule Joint Ownership of Generating and Transmission Facilities) (Details) $ in Millions | Dec. 31, 2025 USD ($)
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Duke Energy Carolinas | Catawba (units 1 and 2) |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership interest (as a percent) | 19.25%
Property, plant, and equipment | $ 1,067
Accumulated depreciation | 600
Construction work in progress | $ 28
Duke Energy Carolinas | W.S. Lee CC |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership interest (as a percent) | 87.27%
Property, plant, and equipment | $ 659
Accumulated depreciation | 139
Construction work in progress | $ 6
Duke Energy Indiana | Gibson (unit 5) |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership interest (as a percent) | 50.05%
Property, plant, and equipment | $ 491
Accumulated depreciation | 295
Construction work in progress | $ 1
Duke Energy Indiana | Vermillion |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership interest (as a percent) | 62.50%
Property, plant, and equipment | $ 182
Accumulated depreciation | 127
Construction work in progress | 1
Duke Energy Indiana | Transmission and local facilities |
Jointly Owned Utility Plant Interests [Line Items] |
Property, plant, and equipment | 8,543
Accumulated depreciation | 1,805
Construction work in progress | $ 357

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- Definition The period end amount owned by the reporting utility of a jointly owned utility plant in service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479070/980-360-S99-1 + Details
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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 -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479070/980-360-S99-1 + 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 -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479070/980-360-S99-1 + 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 -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479070/980-360-S99-1 + Details
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