Property, Plant and Equipment, net (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, plant and equipment, net
Land	$ 17.9	$ 17.7
Buildings (including improvements)	566.0	504.7
Machinery and equipment	1,084.0	960.0
Tooling	801.6	722.4
Capitalized software	172.2	170.2
Construction-in-progress	130.2	143.0
Total	2,771.9	2,518.0
Less: accumulated depreciation	(968.6)	(819.5)
Property, plant and equipment, net	$ 1,803.3	$ 1,698.5