Other income, net - Schedule of Components of Other Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Interest income and other:
Interest and dividends	$ 3.7	$ 4.3
Securities transactions, net	(0.2)
Total	3.5	4.3
Currency transactions, net	(5.3)	(4.3)
Infrastructure reimbursement	5.5	0.2
Other, net	0.4	0.6
Total	4.1	0.8
LandWell
Interest income and other:
Infrastructure development cost reimbursement, for public infrastructure cost as tax increment	5.4
Infrastructure development cost reimbursed, for past costs incurred	$ 0.1	$ 0.2