Estimated Useful Lives of Property Plant and Equipment (Detail)	12 Months Ended
	Dec. 31, 2017
Building and Building Improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of property plant and equipment	15 years
Building and Building Improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of property plant and equipment	30 years
Machinery and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of property plant and equipment	3 years
Machinery and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of property plant and equipment	30 years
Land Use Rights
Property, Plant and Equipment [Line Items]
Estimated useful lives of property plant and equipment	30 years