Restructuring and Other Charges, Net - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) employee	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) Position
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 19,711	$ 1,042	$ 7,594
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	18,309	1,700	$ 7,594
Facility-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, expected charges	6,000
2017 Productivity Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 20,600
Expected number of positions eliminated | employee	370
2017 Productivity Program [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Cash charges	$ 14,000
2017 Productivity Program [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, expected charges	30,000
2017 Productivity Program [Member] | Minimum [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, expected charges	24,000
2017 Productivity Program [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, expected charges	35,000
2017 Productivity Program [Member] | Maximum [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, expected charges	26,000
2015 Severance Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Decrease in provision for severance costs or other employee-related liabilities	(2,300)	$ 1,700
2015 Severance Initiatives [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Cash charges	$ 200
Expected number of positions eliminated | Position			150
Aromor [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 7,200