Restructuring - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 88.0	$ 70.9	$ 63.6
Restructuring charges, including curtailment and settlement losses		72.6
Carrying value in excess of related estimated fair values	4.7	1.3	4.7
Restructuring, expected cost	43.0
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	63.7	59.2	55.4
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	24.0	14.3	8.5
Other income and expense, net
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.3	(0.9)	(0.3)
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	74.5	62.9	54.1
Asset impairments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4.7	1.3	4.7
Pension benefit plan curtailment and settlement losses
Restructuring Cost and Reserve [Line Items]
Settlement/curtailment losses		1.7
Contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.5	1.7	0.1
Other related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 7.3	$ 5.0	$ 4.7