Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment Details [Abstract]
Land	$ 31.7	$ 31.4
Buildings	844.5	829.6
Equipment and leasehold improvements	3,597.6	3,497.2
Property plant and equipment, gross	4,473.8	4,358.2
Accumulated depreciation and amortization	(1,978.1)	(1,859.3)
Property, plant and equipment, net	2,495.7	2,498.9
Construction in progress	90.7	87.4
Depreciation, Depletion and Amortization [Abstract]
Software and other amortization	10.0	10.0	$ 10.0
Total depreciation and amortization	160.8	170.3	189.9
Operating Segments [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation of property, plant and equipment	135.2	141.9	159.6
Software and other amortization	25.6	28.4	30.3
Total depreciation and amortization	$ 160.8	$ 170.3	$ 189.9