XML 37 R19.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Jointly Owned Utility Facilities | 12 Months Ended
--- | ---
Dec. 31, 2024
Jointly Owned Utility Plant, Net Ownership Amount [Abstract] |
JOINTLY OWNED UTILITY FACILITIES | JOINTLY OWNED UTILITY FACILITIES Our electric utilities hold joint ownership interests in certain electric generating facilities. We are entitled to our share of generating capability and output of each facility equal to our respective ownership interest. We have supplied our own financing for all jointly owned projects. We pay our ownership share of additional construction costs, fuel inventory purchases, and operating expenses, unless specific agreements have been executed to limit our maximum exposure to additional costs. We record our proportionate share of significant jointly owned electric generating facilities as property, plant, and equipment on the balance sheets. In addition, our proportionate share of direct expenses for the joint operation of these plants is recorded within operating expenses in the income statements. Information related to jointly owned utility facilities at December 31, 2024 was as follows:
Company |  | Jointly-Owned Utility Facilities |  |  |  | Ownership |  | Share of Capacity (MW) |  | In-Service /Acquisition Date |  | Operating Owner |  | Property, Plant, and Equipment |  | Accumulated Depreciation |  | CWIP
(in millions, except for percentages and MW) |  |  |  |  |  |  |  |  |  |  |  |
We Power (1) |  | ER 1 & ER 2 (2) |  |  |  | 83.34 | % |  | 1,083.4 |  |  | 2010 & 2011 |  | WE |  | $ | 2,482.4 |  |  | $ | (548.3) |  |  | $ | 4.3 |
WPS |  | Weston Unit 4 (2) |  |  |  | 70.0 | % |  | 383.4 |  |  | 2008 |  | WPS |  | 600.9 |  |  | (230.7) |  |  | 1.6 |
WPS |  | Columbia Units 1 & 2 (2) (5) |  |  |  | 27.5 | % |  | 307.5 |  |  | 1975 & 1978 |  | WPL |  | 436.5 |  |  | (186.9) |  |  | 4.0 |
WPS |  | Forward Wind (3) |  |  |  | 44.6 | % |  | 61.5 |  |  | 2008 |  | WPS |  | 120.1 |  |  | (60.0) |  |  | — |
WPS |  | Two Creeks (4) |  |  |  | 66.7 | % |  | 100.0 |  |  | 2020 |  | WPS |  | 136.9 |  |  | (18.6) |  |  | — |
WPS |  | Badger Hollow I (4) |  |  |  | 66.7 | % |  | 100.0 |  |  | 2021 |  | WPS |  | 146.5 |  |  | (14.5) |  |  | 0.4 |
WPS |  | Red Barn (3) |  |  |  | 90.0 | % |  | 82.4 |  |  | 2023 |  | WPS |  | 150.6 |  |  | (8.1) |  |  | — |
WE |  | West Riverside (2) (6) |  |  |  | 27.5 | % |  | 190.5 |  |  | 2023 & 2024 |  | WPL |  | 217.8 |  |  | (29.5) |  |  | 3.2 |
WE |  | Badger Hollow II (4) |  |  |  | 66.7 | % |  | 100.0 |  |  | 2023 |  | WE |  | 179.4 |  |  | (6.0) |  |  | 0.4 |
WE, WPS |  | Paris (solar portion) (4) |  |  |  | 90.0 | % |  | 180.0 |  |  | 2024 |  | WE |  | 357.8 |  |  | — |  |  | 0.5 |
(1) We Power leases its ownership interest in ER 1 and ER 2 to WE. (2) Capacity 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 2025 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. (3) Capacity for wind generating facilities is based on nameplate capacity, which is the amount of energy a turbine should produce at optimal wind speeds. (4) Capacity for solar generating facilities is based on nameplate capacity, which is the maximum output that a generator should produce at continuous full power. (5) These coal units are expected to be retired by the end of 2029. See Note 7, Property, Plant, and Equipment, for more information. (6) WE acquired a 13.8% ownership interest in June 2023 and acquired an additional 13.7% ownership interest in May 2024. See Note 2, Acquisitions, for more information. WE and WPS, along with an unaffiliated utility, received PSCW approval to construct Paris, a utility-scale solar-powered electric generating facility with a battery energy storage system. The solar portion of this project went into service in December 2024 (see details in the table above) and construction of the battery storage is expected to be completed in 2025. O nce fully constructed, WE and WPS will collectively own 90%, or 99 MWs of battery storage of this project. Our CWIP balance for Paris battery storage was $217.0 million as of December 31, 2024. WE and WPS, along with an unaffiliated utility, received PSCW approval to construct Darien, a utility-scale solar-powered electric generating facility with a battery energy storage system. Once constructed, WE and WPS will collectively own 90%, or 225 MWs of solar generation and 68 MWs of battery storage of this project. Commercial operation of the solar portion and the battery storage is expected to be completed in 2025 and 2026, respectively. Our CWIP balance for Darien was $422.2 million as of December 31, 2024. WE and WPS, along with an unaffiliated utility, received PSCW approval to construct Koshkonong, a utility-scale solar-powered electric generating facility with a battery energy storage system. Once fully constructed, WE and WPS will collectively own 90%, or 270 MWs of solar generation and 149 MWs of battery storage of this project. Commercial operation of the solar facility and the battery storage is expected to be completed in 2026 and 2027, respectively. Our CWIP balance for Koshkonong was $140.3 million as of December 31, 2024.

X
- References No definition available. + Details
Name: | us-gaap_JointlyOwnedUtilityPlantNetOwnershipAmountAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure of interests in jointly owned utility plants. + References No definition available. + Details
Name: | wec_JointlyOwnedUtilityFacilitiesDisclosureTextBlock
Namespace Prefix: | wec_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration