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Reportable Segments - Reconciliation of operating income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Operating performance by segment
Operating income	$ 24.4	$ 70.4
Foreign exchange loss, net		(0.3)
Other income, net	0.1
Interest expense, net	(4.6)	(7.8)
Income before provision for income taxes	19.9	62.3
Corporate and non-allocated costs
Operating performance by segment
Operating income	$ (35.9)	$ (26.6)

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