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PROPERTY, PLANT, AND EQUIPMENT - PUBLIC SERVICE BUILDING AND STEAM TUNNEL ASSETS (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2020
Property, plant, and equipment |  |  |
Insurance proceeds received for property damage | $ 41.0 | $ 0.0 |
WE | Public Service Building and Steam Tunnel Assets |  |  |
Property, plant, and equipment |  |  |
Costs incurred for repairs and restorations | 95.3 |  |
Insurance proceeds received for property damage | 41.0 |  | $ 20.0
Costs included in other operation and maintenance |  |  | $ 12.5
Repairs and restorations to be recovered through rates | $ 21.8 |  |

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- Definition Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Excludes construction work in progress and property under finance and capital leases. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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