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v3.25.1

Debt and Credit Facility - Summary of Interest Expense Relating to Senior Notes and Revolving Credit Facility (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Debt Instrument [Line Items] |  |  |
Total interest expense | $ 11.2 | $ 11.5 | [1]
Senior Notes and Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Interest expense on finance lease liabilities | 0.2 | 0.2 |
Interest expense capitalized as construction in progress | (2.0) | (1.7) |
Total interest expense | 11.2 | 11.5 |
Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Revolving Credit Facility interest expense, including commitment fees and finance cost amortization | 0.6 | 0.6 |
Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Senior Notes interest expense, including debt issuance cost amortization | $ 12.4 | $ 12.4 |
[1] | Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 14 for further discussion.

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