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Income taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income tax (expense) benefit	$ (13.3)	$ (9.7)
Pre-tax income	$ 75.3	$ 105.6
Effective tax rate	17.70%
Unrecognized tax benefits	$ 0.9
Unrecognized tax benefits that would impact the effective tax rate	$ 0.8

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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