Estimated Useful Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2016
Leasehold improvements
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	Term of lease
Capital Lease
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	Term of lease
Minimum | Buildings and building improvements
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	3 years
Minimum | Plant And Equipment
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	1 year
Minimum | Production tooling
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	2 years
Minimum | Computer equipment and software
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	1 year
Maximum | Buildings and building improvements
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	50 years
Maximum | Plant And Equipment
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	20 years
Maximum | Production tooling
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	7 years
Maximum | Computer equipment and software
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	10 years