Property and Equipment (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and equipment, gross	558.0	421.6
Less accumulated depreciation	(255.1)	(213.3)
Property and equipment	302.9	208.3
Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	1 year
Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	50 years
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	112.8	97.5
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	1 year	1 year
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	50 years	50 years
Machinery
Property, Plant and Equipment [Line Items]
Property and equipment, gross	134.2	96.7
Machinery | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	1 year	1 year
Machinery | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	20 years	20 years
Tooling
Property, Plant and Equipment [Line Items]
Property and equipment, gross	70.0	52.5
Tooling | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	2 years	2 years
Tooling | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	10 years	10 years
Computer Equipment and Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	216.3	158.3
Computer Equipment and Software | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	1 year	1 year
Computer Equipment and Software | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	10 years	10 years
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	24.7	16.6
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	1 year	1 year
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	15 years	15 years