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Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 489.5	$ 552.4
Contract liabilities	52.0		$ 30.6
United States
Disaggregation of Revenue [Line Items]
Revenue	300.0	342.3
Iceland
Disaggregation of Revenue [Line Items]
Revenue	$ 189.5	$ 210.1

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