Restructuring and Other Charges, Net - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) employee	Mar. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 717	$ 10,143
2017 Productivity Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 21,300
Number of positions expected to be eliminated | employee	370
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 700
Employee Severance [Member] | 2017 Productivity Program [Member]
Restructuring Cost and Reserve [Line Items]
Payments for restructuring	1,700
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge	10,100
Minimum | 2017 Productivity Program [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	30,000
Minimum | Employee Severance [Member] | 2017 Productivity Program [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	24,000
Minimum | Facility-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	6,000
Maximum | 2017 Productivity Program [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	35,000
Maximum | Employee Severance [Member] | 2017 Productivity Program [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	$ 26,000