Business, Basis of Presentation and Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Detail)	12 Months Ended
	Dec. 31, 2017
Minimum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated useful lives	30 years
Minimum [Member] | Buildings and Related Structures [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated useful lives	10 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated useful lives	10 years
Minimum [Member] | Others [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated useful lives	3 years
Maximum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated useful lives	40 years
Maximum [Member] | Buildings and Related Structures [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated useful lives	20 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated useful lives	12 years
Maximum [Member] | Others [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated useful lives	10 years