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Other Accrued Liabilities and Other Long-Term Liabilities - Other Accrued Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Jun. 30, 2019
Payables And Accruals [Abstract]    
Customer Obligations $ 27.3 $ 52.0
Inventory obligations 27.1 26.7
Operating lease liabilities 8.3  
Warranty 4.0 4.0
Other 20.9 23.4
Other accrued liabilities $ 87.6 $ 106.1