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Other Accrued Liabilities - Other Accrued Liabilities (Detail) - USD ($)
$ in Millions
Mar. 31, 2019
Jun. 30, 2018
Payables And Accruals [Abstract]    
Customer Obligations $ 47.8 $ 26.4
Inventory obligations 30.1 28.8
Warranty 4.0 5.5
Other 17.2 19.0
Other accrued liabilities $ 99.1 $ 79.7