Retirement Benefit Plans - Total Accumulated Benefit Obligations and Plans with Accumulated Benefit Obligations in Excess of Plan Assets (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]
Total accumulated benefit obligations	$ 354.6	$ 337.5
Plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligation	34.8	32.8
Plan assets at fair market value	20.6	22.0
Foreign-based Defined Benefit Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Total accumulated benefit obligations	556.8	413.1
Plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligation	380.1	358.6
Plan assets at fair market value	$ 314.9	$ 315.0