Other Current and Long-term Assets - Schedule of other long-term assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Other Assets [Abstract]
Minority and equity method investments (note 5)	$ 113.6	$ 81.0
Income and other taxes receivable (note 14)	82.5	77.2
Interest rate cross-currency swap agreements (note 23)	11.1	8.3
Lease receivable	4.3	1.9
Other assets	21.2	15.6
Other long-term assets	$ 232.7	$ 184.0