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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain(Loss) Recognized in AOCI			$ (18.7)	$ 5.3
(Loss) Reclassified from AOCI into Income	$ (0.4)	$ (0.4)	(1.0)	(1.6)
Continuing Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income	(0.4)	(0.4)	(1.0)	(1.5)
Discontinued Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income				(0.1)
Natural Gas Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain(Loss) Recognized in AOCI				0.2
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				0.7
Foreign Exchange Contracts - Sales [Member] | Net Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income		(0.1)		(0.3)
Interest Rate Swap Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain(Loss) Recognized in AOCI			(18.7)	4.3
Interest Rate Swap Contracts [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Reclassified from AOCI into Income	$ (0.4)	$ (0.3)	$ (1.0)	$ (0.8)