Restructuring Charges - Additional Information (Detail)	Jul. 27, 2018 USD ($)
May 2018 Restructuring
Restructuring Cost and Reserve [Line Items]
Reduction of global work force	2.00%
Restructuring plan significant additional charges	$ 0
November 2016 Restructuring
Restructuring Cost and Reserve [Line Items]
Reduction of global work force	6.00%