Schedule of Maturities of Lease Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
OPERATING LEASES
2021	$ 13.7
2022	10.6
2023	5.8
2024	3.2
2025	2.4
Thereafter	6.0
Total lease payments	41.7
Less: interest	(1.4)
Total lease liabilities	40.3	$ 37.7
FINANCE LEASES
2021	0.6
2022	0.2
2023	0.2
2024	0.1
Total lease payments	1.1
Less: interest	(0.1)
Total lease liabilities	$ 1.0	$ 1.2