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v3.22.4

Variable Interest Entities - WEPCo Environmental Trust (Details) - USD ($) $ in Millions | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Nov. 30, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Assets |  |  |  |
Other current assets (restricted cash) |  | $ 25.6 | $ 19.6 | $ 0.0
Regulatory assets |  | 3,264.6 | 3,264.8 |
Other long-term assets (restricted cash) |  | 127.7 | 51.6 | $ 47.8
Liabilities |  |  |  |
Current portion of long-term debt |  | 808.5 | 91.0 |
Long-term debt |  | 14,655.7 | 13,472.4 |
WEPCo Environmental Trust |  |  |  |
Variable interest entities |  |  |  |
Securitization of environmental control costs related to Pleasant Prairie power plant | $ 100.0 |  |  |
Assets |  |  |  |
Other current assets (restricted cash) |  | 3.0 | 2.4 |
Regulatory assets |  | 92.4 | 100.7 |
Other long-term assets (restricted cash) |  | 0.6 | 0.6 |
Liabilities |  |  |  |
Current portion of long-term debt |  | 8.9 | 8.8 |
Other current liabilities (accrued interest) |  | 0.1 | 0.1 |
Long-term debt |  | $ 94.1 | $ 102.7 |

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