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Leases - Future Minimum Rental Obligations Under Non-cancelable Operating Leases (Detail)
$ in Millions
Dec. 31, 2015
USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2016 $ 14.2
2017 10.1
2018 7.6
2019 5.6
2020 3.8
Thereafter 0.9
Total $ 42.2