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Jointly Owned Utility Facilities (Details) $ in Millions | Dec. 31, 2018 USD ($) MW
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Oak Creek Expansion Units 1 and 2 | We Power |
Jointly Owned Electric Generating Facilities |
Ownership (as a percentage) | 83.34%
Share of rated capacity (MW) (1) | MW | 1,056.8
Property, plant, and equipment | $ 2,450.6
Accumulated depreciation | (394.1)
Construction Work in Progress | $ 1.8
Weston 4 | WPS |
Jointly Owned Electric Generating Facilities |
Ownership (as a percentage) | 70.00%
Share of rated capacity (MW) (1) | MW | 384.9
Property, plant, and equipment | $ 615.4
Accumulated depreciation | (205.2)
Construction Work in Progress | $ 1.9
Columbia Energy Center Units 1 and 2 | WPS |
Jointly Owned Electric Generating Facilities |
Future Ownership Interest of Columbia | 27.50%
Ownership (as a percentage) | 28.10%
Share of rated capacity (MW) (1) | MW | 314.8
Property, plant, and equipment | $ 438.8
Accumulated depreciation | (132.2)
Construction Work in Progress | $ 0.3
Forward Wind Energy Center | WPS |
Jointly Owned Electric Generating Facilities |
Ownership (as a percentage) | 44.60%
Share of rated capacity (MW) (1) | MW | 8.7
Property, plant, and equipment | $ 123.7
Accumulated depreciation | (43.7)
Construction Work in Progress | $ 0.1

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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 -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 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
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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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- Definition The future proportionate share of interest (percent) in Columbia as capital expenditures increase by Columbia and not WPS, through June 1, 2020 + References No definition available. + Details
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- Definition The entity's proportionate share of the rated capacity of a jointly owned utility plant. + References No definition available. + Details
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