Restructuring - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Total restructuring reserve balance	$ 33.4	$ 39.6	$ 35.8	$ 87.1
Minimum
Restructuring Cost and Reserve [Line Items]
Aggregate cost for restructuring initiatives	11.0
Maximum
Restructuring Cost and Reserve [Line Items]
Aggregate cost for restructuring initiatives	31.0
Western Europe Restructuring Activities
Restructuring Cost and Reserve [Line Items]
Aggregate cost for restructuring initiatives	109.0
Remaining restructuring liability	$ 27.0