Impairment and Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	$ 8.3	$ 2.2	$ 25.1	$ 2.2
Loss on disposal of assets		2.2		2.2
Assets Held-for-sale	12.5		12.5		2.5
Restructuring and repositioning expenses [Abstract]
Employee severance and related benefits	1.0	0	6.6	0
Repositioning costs	0.4	0	0.7	0
Total restructuring and repositioning expenses	1.4	0	7.3	0
Accrued Restructuring Liability [Roll Forward]
Beginning Balance	4.7		0
Additions	1.0		6.6
Payments	(0.9)		(1.9)
Effect of exchange rate changes	0.2		0.3
Ending Balance	5.0		5.0
Europe segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges			$ 24.1