Other Income, Net - Schedule of Components of Other Income (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest income and other:
Interest and dividends				$ 6.2	$ 2.8
Securities transactions, net				(0.6)	0.1
Total				5.6	2.9
Infrastructure reimbursement		$ 0.8		10.8	6.2
Gain on land sales					16.0
Currency transactions, net				17.1	1.2
Insurance recoveries	$ 2.7			2.7
Other, net				1.9	1.6
Total	$ 23.1		$ 13.1	$ 38.1	$ 27.9