Leases - Schedule Of Maturities Of Lease Liabilities (Detail) $ in Millions	Mar. 31, 2019 USD ($)
2019 (Excludes three months ended March 31, 2019)	$ 124.7
2020	136.2
2021	113.5
2022	97.8
2023	73.8
Thereafter	264.6
Total lease payments	810.6
Less imputed interest	(125.2)
Present value of lease liabilities	685.4
2019 (Excludes three months ended March 31, 2019)	3.3
2020	4.3
2021	4.2
2022	3.3
2023	1.5
Thereafter	0.4
Total lease payments	17.0
Less imputed interest	(1.7)
Present value of lease liabilities	$ 15.3