Restructuring - Additional Information (Detail) - USD ($)	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Total restructuring reserve balance	$ 41,100,000	$ 41,700,000	$ 30,800,000	$ 37,500,000
Western Europe Restructuring Activities
Restructuring Cost and Reserve [Line Items]
Aggregate cost for restructuring initiatives	101,000,000
Remaining restructuring liability	36,700,000
Maximum
Restructuring Cost and Reserve [Line Items]
Aggregate cost for restructuring initiatives	28,000,000
Minimum
Restructuring Cost and Reserve [Line Items]
Aggregate cost for restructuring initiatives	$ 10,000,000