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Accrued Liabilities - Summary of Accrued Liabilities (Detail) - USD ($)
$ in Millions
Sep. 30, 2016
Jun. 30, 2016
Payables and Accruals [Abstract]    
Employee compensation and benefits $ 37.0 $ 37.3
Accrued taxes payable 3.2 2.8
Other 14.6 9.4
Total accrued liabilities $ 54.8 $ 49.5