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Commitments and Contingencies - Future Minimum Lease Payments for Non-Cancellable Operating Leases (Detail)
$ in Millions
Mar. 31, 2017
USD ($)
Leases [Abstract]  
2018 $ 16.0
2019 13.0
2020 10.6
2021 7.2
2022 6.7
Thereafter 17.8
Total $ 71.3