Restructuring - Additional Information (Detail) - USD ($)	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Total restructuring reserve balance	$ 43,800,000	$ 24,700,000	$ 37,500,000	$ 58,400,000	$ 66,600,000	$ 87,900,000
Western Europe Restructuring Activities
Restructuring Cost and Reserve [Line Items]
Aggregate cost for restructuring initiatives	102,000,000
Remaining restructuring liability	36,500,000
Minimum
Restructuring Cost and Reserve [Line Items]
Aggregate cost for restructuring initiatives	10,000,000
Maximum
Restructuring Cost and Reserve [Line Items]
Aggregate cost for restructuring initiatives	$ 28,000,000