Derivatives and Hedging Activities, (Gain) Loss by Hedging Relationship, by Income Statement Location, (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments, (Gain) Loss [Line Items]
Amount of Loss Recognized in AOCI			$ 0.3	$ 1.4
Total Loss (Gain) Recognized in Continuing Operations	0	0.1	0	2.4
Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Loss Reclassified from AOCI into Continuing Operations	0.1	1.0	0.2	1.7
Foreign Exchange Contract [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of Loss Recognized in AOCI			0	0
Statement of Operations Location			Other expense - net	Other expense - net
Commodity Derivatives [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of Loss Recognized in AOCI			0.3	1.4
Statement of Operations Location			Cost of sales	Cost of sales
Cost of Sales [Member] | Commodity Derivatives [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Total Loss (Gain) Recognized in Continuing Operations	(0.1)	0	0.2	2.7
Cost of Sales [Member] | Commodity Derivatives [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Loss Reclassified from AOCI into Continuing Operations	0.1	1.0	0.2	1.7
Other expense - net [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Total Loss (Gain) Recognized in Continuing Operations	0.1	0.1	(0.2)	(0.3)
Other expense - net [Member] | Foreign Exchange Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Loss Reclassified from AOCI into Continuing Operations	$ 0	$ 0	$ 0	$ 0