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Employee Benefit Plans - Additional Information (Detail) - Pension Plan
$ in Millions
Mar. 31, 2018
USD ($)
International  
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]  
Expected plan contributions $ 7.3
U.S.  
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]  
Expected plan contributions $ 0.0