Restructuring Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	Dec. 05, 2013	May 02, 2014
Restructuring Cost and Reserve [Line Items]
Expected integration cost	$ 40
Restructuring expense		8.9
Write off of property, plant and equipment		2.5
Severance cost		4.1
Accrued restructuring		4.0
Minimum
Restructuring Cost and Reserve [Line Items]
Expected integration cost		25
Maximum
Restructuring Cost and Reserve [Line Items]
Expected integration cost		$ 30