Retirement Benefit Plans - Part of Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
U.S. and Puerto Rico [Member]
Pension And Other Employee Benefit Plans [Line Items]
Unrecognized prior service cost	$ (2.6)
Unrecognized actuarial loss	18.3
Total amount recognized	15.7
Foreign-based Defined Benefit Plans [Member]
Pension And Other Employee Benefit Plans [Line Items]
Unrecognized prior service cost	(1.9)
Unrecognized actuarial loss	2.7
Total amount recognized	$ 0.8