Retirement Benefit Plan - Summary of Amounts Recognized in Balance Sheet (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
U.S. and Puerto Rico [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Prepaid pension	$ 14.6	$ 29.4
Short-term accrued benefit liability	(1.0)	(0.7)
Long-term accrued benefit liability	(14.6)	(13.1)
Net amount recognized	(1.0)	15.6
Foreign-based Defined Benefit Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Prepaid pension	16.5	12.4
Short-term accrued benefit liability	(0.6)	(0.5)
Long-term accrued benefit liability	(78.9)	(50.2)
Net amount recognized	$ (63.0)	$ (38.3)