Pension and Other Benefit Programs (Components of Net Periodic Benefit Credit within Income Statement) (Details) - ASU 2017-07 [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension and postretirement (credit)	$ (6.5)	$ (5.7)	$ (13.4)	$ (11.4)
Cost of goods sold [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost of benefits earned during the period	0.9	1.3	1.8	2.6
SG&A Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost of benefits earned during the period	0.7	0.9	1.2	1.8
Other non-operating expense [Member]
Defined Benefit Plan Disclosure [Line Items]
Other non-operating expense	$ (8.1)	$ (7.9)	$ (16.4)	$ (15.8)