Property, Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment:
Land and buildings	$ 425.4	$ 430.3
Machinery and equipment	1,807.6	1,741.4
Subtotal	2,233.0	2,171.7
Less allowances for depreciation	(1,428.6)	(1,393.9)
Property, Plant and Equipment - net	$ 804.4	$ 777.8	$ 780.5