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v3.26.1

Related Party Transactions (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025
Board Member Consulting Agreement |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Cash paid for consulting fees | $ 0.2 |  |  |  |
Outstanding amounts payable for the consulting services | 0.0 |  | $ 0.0 |  |
Related Party | Total Energies S.E. |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Proceeds from related party | 0.0 | $ 0.0 | 0.0 | $ 0.0 |
Related Party | SAFE S.p.A. |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Payable to related parties | 0.3 |  | 0.3 |  | $ 0.5
Related Party | Business Expenses Reimbursement | Total Energies S.E. |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related party expense | 0.3 | 0.2 | 0.5 | 0.4 |
Related Party | Business Expenses Reimbursement | SAFE S.p.A. |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related party expense | 1.9 | 0.4 | 2.8 | 0.8 |
Related Party | Business Expenses Reimbursement | TotalEnergies JV and bpJV |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related party expense | 0.6 | 0.1 | 0.7 | 0.1 |
Receivables from related party | 0.9 |  | 0.9 |  | 0.3
Related Party | Management Fee for Services | TotalEnergies JV and bpJV |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Proceeds from related party | 1.1 | 0.9 | 2.1 | 1.7 |
Receivables from related party | 3.6 |  | 3.6 |  | 1.7
Related Party | Management Fee for Services & Business Expenses Reimbursement | TotalEnergies JV and bpJV |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Proceeds from related party | 0.5 | 1.0 | 0.6 | 1.6 |
Related Party | Sharing of Environmental Credits | TotalEnergies JV and bpJV |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related party expense | 0.9 | 0.9 | 1.8 | 1.9 |
Payable to related parties | 0.7 |  | 0.7 |  | 0.4
Related Party | Guaranty Agreement | TotalEnergies JV and bpJV |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Tax credit loss |  | 38.3 |  | 38.3 |
Fee received |  | 0.7 |  | 0.7 |
Equity Method Investees | Rimere |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Payable to related parties | 0.0 |  | 0.0 |  | 0.0
Receivables from related party | $ 0.0 |  | $ 0.0 |  | $ 0.0
Equity Method Investees | Loan Commitment | Rimere |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Proceeds from related party |  | 0.2 |  | 0.3 |
Amount provided for funding in certain equity method investee |  | $ 0.9 |  | $ 2.4 |

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