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Subsequent Event - Additional Information (Detail) - Subsequent Event [Member]
$ in Millions
Nov. 09, 2017
USD ($)
Subsequent Event [Line Items]  
Expected annualized savings from restructuring action $ 40
Minimum [Member]  
Subsequent Event [Line Items]  
Estimated cost of restructuring action for fiscal 2018 8
Maximum [Member]  
Subsequent Event [Line Items]  
Estimated cost of restructuring action for fiscal 2018 $ 10