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Leases - Schedule of Future Minimum Rental Commitments Under Non-Cancelable Operating Leases (Detail)
$ in Millions
Dec. 31, 2015
USD ($)
Leases [Abstract]  
2016 $ 59.1
2017 44.7
2018 33.9
2019 26.4
2020 21.8
Thereafter $ 45.9