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Property, Plant and Equipment - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [abstract]    
Pledged as collateral for loans, financing and labor contingencies $ 114.5 $ 134.1
Average rate for capitalization of borrowing costs 5.50% 5.40%