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v3.22.2.2

Related-Party Transactions (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2022 | Jul. 31, 2021 | Jan. 31, 2022
Related-Party Transactions (Details) [Line Items] |  |  |  |  |
Accounts Payable, Related Parties, Current | $ 0.6 |  | $ 0.6 |  | $ 0.5
One Earth Energy And Nu Gen Energy [Member] |  |  |  |  |
Related-Party Transactions (Details) [Line Items] |  |  |  |  |
Costs and Expenses, Related Party | 35.3 | $ 20.7 | 66.1 | $ 37.4 |
Accounts Payable, Related Parties, Current | 0.6 |  | 0.6 |  | $ 0.5
Refined Coal [Member] |  |  |  |  |
Related-Party Transactions (Details) [Line Items] |  |  |  |  |
Payments for Commissions | $ 0.2 |  | $ 0.2 |  |

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