Other Income, Net - Schedule of Components of Other Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Securities earnings:
Dividends and interest	$ 4.0	$ 4.8	$ 10.9
Securities transactions, net		(0.1)	0.3
Total	4.0	4.7	11.2
Gain on land sales	16.0	4.5	4.4
Infrastructure reimbursement	15.3	19.7	9.2
Insurance recoveries	0.1	1.6	7.7
Currency transactions, net	1.6	(4.0)	2.0
Disposal of property and equipment, net	(0.6)	(0.2)	(0.3)
Gain on sale of business		4.9	3.0
Other, net	2.6	2.1	3.7
Total	$ 39.0	$ 28.4	$ 40.9