Retirement Benefit Plans - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017 USD ($)
Foreign-based Defined Benefit Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Contribution towards defined benefit plans	$ 13,200,000
Expected contribution during remainder of year	4,700,000
U.S. and Puerto Rico [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Contribution towards defined benefit plans	0
Expected contribution during remainder of year	$ 0