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v3.23.3

Debt and Credit Facility - Summary of Interest Expense Relating to Senior Notes and Revolving Credit Facility (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Debt Instrument [Line Items] |  |  |  |
Total interest expense | $ 11.4 | $ 12.1 | $ 35.4 | $ 36.5
Senior Notes and Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest expense capitalized as construction in progress | (1.8) | (0.9) | (4.7) | (2.3)
Total interest expense | 11.4 | 12.1 | 35.4 | 36.5
Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Revolving Credit Facility, including commitment fees and finance cost amortization | 0.8 | 0.6 | 2.9 | 1.6
Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Senior Notes. including debt issuance cost amortization | $ 12.4 | $ 12.4 | $ 37.2 | $ 37.2

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