Leases - Schedule Of Maturities Of Lease Liabilities (Detail) $ in Millions	Sep. 30, 2019 USD ($)
Leases [Abstract]
2019 (Excludes nine months ended September 30, 2019)	$ 45.0
2020	158.5
2021	131.3
2022	110.0
2023	85.2
Thereafter	281.0
Total lease payments	811.0
Less: imputed interest	(123.7)
Present value of lease liabilities	687.3
2019 (Excludes nine months ended September 30, 2019)	1.1
2020	4.3
2021	4.2
2022	3.3
2023	1.5
Thereafter	0.4
Total lease payments	14.8
Less: imputed interest	(0.9)
Present value of lease liabilities	$ 13.9