Derivative Financial Instruments (Summary of Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income) (Details) - Derivatives in Cash Flow Hedging Relationships [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain(Loss) Recognized in AOCI	$ (7.4)	$ 3.7
(Loss) Reclassified from AOCI into Income	(0.6)	(1.2)
Continuing Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income	(0.6)	(1.1)
Discontinued Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income		(0.1)
Natural Gas Commodity Contracts [Member] | Cost of goods sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income		(0.4)
Foreign Exchange Contracts - Purchases [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain(Loss) Recognized in AOCI		0.1
Foreign Exchange Contracts - Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain(Loss) Recognized in AOCI		0.3
Foreign Exchange Contracts - Sales [Member] | Net Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income		(0.2)
Interest Rate Swap Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain(Loss) Recognized in AOCI	(7.4)	3.3
Interest Rate Swap Contracts [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income	$ (0.6)	$ (0.5)