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Jointly Owned Facilities (Details) $ in Millions | Dec. 31, 2017 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 | $ 2,431.0
Accumulated depreciation | (351.2)
Construction Work in Progress | $ 9.5
Weston 4 | WPS |
Jointly Owned Electric Generating Facilities |
Ownership (as a percentage) | 70.00%
Share of rated capacity (MW) (1) | MW | 383.9
Property, plant, and equipment | $ 600.5
Accumulated depreciation | (189.2)
Construction Work in Progress | $ 5.3
Columbia Energy Center Units 1 and 2 | WPS |
Jointly Owned Electric Generating Facilities |
Future Ownership Interest of Columbia | 27.50%
Ownership (as a percentage) | 29.50%
Share of rated capacity (MW) (1) | MW | 319.7
Property, plant, and equipment | $ 412.7
Accumulated depreciation | (127.3)
Construction Work in Progress | $ 27.6
Edgewater Unit 4 | WPS |
Jointly Owned Electric Generating Facilities |
Ownership (as a percentage) | 31.80%
Share of rated capacity (MW) (1) | MW | 98.0
Property, plant, and equipment | $ 45.9
Accumulated depreciation | (32.9)
Construction Work in Progress | $ 0.0

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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://www.xbrl.org/2003/role/presentationRef -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=6500719&loc=d3e659983-123033 + 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://www.xbrl.org/2003/role/presentationRef -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=6500719&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://www.xbrl.org/2003/role/presentationRef -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=6500719&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://www.xbrl.org/2003/role/presentationRef -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=6500719&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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