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Jointly Owned Utility Facilities (Tables) | 12 Months Ended
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Dec. 31, 2019
Jointly Owned Utility Plant, Net Ownership Amount [Abstract] |
Schedule of Jointly Owned Utility Plants | Information related to jointly owned utility facilities at December 31, 2019 was as follows:
|  | We Power |  | WPS
(in millions, except for percentages and MW) |  | Elm Road Generating Station Units 1 and 2 |  | Weston Unit 4 |  | Columbia Energy Center Units 1 and 2 (2) |  | Forward Wind Energy Center
Ownership |  | 83.34 | % |  | 70.0 | % |  | 27.6 | % |  | 44.6 | %
Share of rated capacity (MW) (1) |  | 1,054.3 |  |  | 386.0 |  |  | 313.9 |  |  | 8.4 |
In-service date |  | 2010 and 2011 |  |  | 2008 |  |  | 1975 and 1978 |  |  | 2008 |
Property, plant, and equipment |  | $ | 2,447.9 |  |  | $ | 663.2 |  |  | $ | 422.3 |  |  | $ | 118.7 |
Accumulated depreciation |  | $ | (416.1 | ) |  | $ | (232.4 | ) |  | $ | (129.5 | ) |  | $ | (46.4 | )
CWIP |  | $ | 0.8 |  |  | $ | 5.3 |  |  | $ | 1.8 |  |  | $ | 0.1 |
(1) | Capacity for our electric generation facilities is based on rated capacity, which is the net power output under average operating conditions with equipment in an average state of repair as of a given month in a given year. Values are primarily based on the net dependable expected capacity ratings for summer 2020 established by tests and may change slightly from year to year. The summer period is the most relevant for capacity planning purposes. This is a result of continually reaching demand peaks in the summer months, primarily due to air conditioning demand.
(2) Columbia Energy Center is jointly owned by Wisconsin Power and Light, Madison Gas and Electric, and WPS. In October 2016, Wisconsin Power and Light received an order from the PSCW approving amendments to the Columbia Energy Center joint operating agreement between the parties allowing WPS and Madison Gas and Electric to forgo certain capital expenditures at the Columbia Energy Center. As a result, Wisconsin Power and Light will incur these capital expenditures in exchange for a proportional increase in its ownership share of the Columbia Energy Center. Based upon the additional capital expenditures Wisconsin Power and Light expects to incur through June 1, 2020, WPS's ownership interest would decrease to 27.5%

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- Definition Tabular disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants. + 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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