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Retirement Benefit Plans - Summary of Benefits Expected to be Paid Out (Detail)
$ in Millions
Dec. 31, 2015
USD ($)
U.S. and Puerto Rico [Member]  
Schedule of Expected Future Pension Benefit Payment [Line Items]  
2016 $ 14.3
2017 15.8
2018 17.3
2019 19.1
2020 20.6
2021-2025 118.4
Foreign-based Defined Benefit Plans [Member]  
Schedule of Expected Future Pension Benefit Payment [Line Items]  
2016 22.4
2017 22.5
2018 23.0
2019 24.0
2020 23.9
2021-2025 $ 125.2