Estimated Useful Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2014
Buildings | Minimum
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	5 years
Buildings | Maximum
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	50 years
Plant and Equipment | Minimum
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	1 year
Plant and Equipment | Maximum
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	20 years
Production tooling
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	Estimated life of tool
Production tooling | Minimum
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	2 years
Production tooling | Maximum
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	5 years
Leasehold improvements
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	Shorter of estimated life or term of lease
Computer equipment and software | Minimum
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	1 year
Computer equipment and software | Maximum
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	10 years
Capital Leases
Property Plant And Equipment [Line Items]
Property plant and equipment, estimated useful life	Shorter of useful life or term of lease