Components of Net Periodic Benefit Cost from Continuing Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plans, Defined Benefit
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit (credit) cost	$ 16.9
Pension Plans, Defined Benefit | U.S. Pension Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	8.7	$ 9.0	$ 8.3
Interest cost	12.8	14.8	14.6
Expected return on plan assets	(20.4)	(17.6)	(16.6)
Amortization of prior service credit	0.1	0.0	(0.9)
Amortization of actuarial loss	2.2	6.0	4.8
Curtailment loss		0.2
Net periodic benefit (credit) cost	3.4	12.4	10.2
Pension Plans, Defined Benefit | Non-U.S. Pension Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	10.8	10.4	10.8
Interest cost	5.7	5.5	5.8
Expected return on plan assets	(2.0)	(1.9)	(2.2)
Amortization of prior service credit	0.3	0.2	0.2
Amortization of actuarial loss	1.4	1.9	1.4
Settlement loss (gain)	0.2	0.1	(2.4)
Special termination benefits	0.5	0.3	0.1
Net periodic benefit (credit) cost	16.9	16.5	13.7
Postretirement Benefits Other Than Pensions
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.3	0.3	0.3
Interest cost	0.6	0.6	0.7
Amortization of prior service credit	(2.2)	(2.2)	(2.2)
Amortization of actuarial loss	(0.3)	(0.5)
Net periodic benefit (credit) cost	$ (1.6)	$ (1.8)	$ (1.2)