Property, Plant and Equipment (Details) - USD ($) $ in Millions	Sep. 27, 2018	Dec. 31, 2017
Property, plant and equipment, net
Land	$ 15.5	$ 15.9
Buildings (including improvements)	813.3	764.1
Machinery and equipment	1,630.3	1,529.9
Tooling	1,027.2	1,013.9
Capitalized software	269.2	263.3
Construction-in-progress	212.5	213.4
Total	3,968.0	3,800.5
Less: accumulated depreciation	(1,845.0)	(1,695.2)
Property, plant and equipment, net	$ 2,123.0	$ 2,105.3