Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2026 |
|
| Summary of Significant Accounting Policies | ||
| Equipment related to power purchase agreements and fuel delivered to customers, net | $ 11.7 | $ 12.6 |
| Impairment attributable to assets no longer in service | 2.5 | 5.2 |
| Finance Lease, Impairment Loss | 5.2 | 5.2 |
| Impairment of Prepaid Expenses, Tax Credits and Other Current Assets | 0.0 | $ 0.2 |
| Recovery of impairment loss for assets | 39.7 | |
| Recovery of impairment loss of contract assets | 37.0 | |
| Recovery of impairment loss of long lived assets | 2.2 | |
| Recovery of impairment loss of other assets | $ 0.5 |