Employee Benefit and Retirement Plans - Schedule of Company's Pension Cost And Supplemental Retirement Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.5	$ 0.8	$ 2.8
Interest cost	49.1	46.4	49.6
Expected return on plan assets	59.2	67.5	73.3
Prior service cost (credit)	(0.1)	(0.1)	(0.1)
Net actuarial loss	(15.5)	(21.4)	(23.7)
Curtailment, settlement and termination (benefit) costs		0.0	3.7
Total expense (income)	$ 5.8	$ 1.0	$ (1.0)
Effective discount rate for benefit obligations	4.12%	3.48%	3.99%
Effective rate for interest on benefit obligations	3.79%	3.09%	3.28%
Effective rate for service cost	3.93%	3.32%	3.83%
Effective rate for interest on service cost	3.62%	2.98%	3.38%
Long-term rate of return on plan assets	5.25%	5.75%	6.04%
Long-term rate of compensation increase	3.00%	2.54%	2.50%
Pension Benefits | International
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6.5	$ 6.3	$ 7.3
Interest cost	12.6	13.1	13.4
Expected return on plan assets	13.0	14.9	18.4
Prior service cost (credit)	0.5	0.4	0.4
Net actuarial loss	(1.8)	(2.0)	(2.0)
Curtailment, settlement and termination (benefit) costs	(0.6)	(1.3)	(1.3)
Total expense (income)	$ 9.0	$ 8.2	$ 6.0
Effective discount rate for benefit obligations	2.52%	2.24%	2.10%
Effective rate for interest on benefit obligations	2.20%	1.94%	1.70%
Effective rate for service cost	1.89%	2.33%	2.44%
Effective rate for interest on service cost	2.24%	2.27%	2.38%
Long-term rate of return on plan assets	2.47%	2.58%	3.20%
Long-term rate of compensation increase	2.32%	3.47%	3.53%
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.2	$ 0.3	$ 0.1
Interest cost	1.8	1.8	2.2
Prior service cost (credit)	(4.9)	(6.6)	(5.2)
Net actuarial loss	4.5	3.6	3.9
Total expense (income)	$ (7.4)	$ (8.1)	$ (6.8)
Effective discount rate for benefit obligations	3.90%	3.09%	3.76%
Effective rate for interest on benefit obligations	2.71%	2.71%	3.07%
Effective rate for service cost	2.97%	2.98%	3.25%
Effective rate for interest on service cost	2.78%	2.78%	3.02%