Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended		12 Months Ended			12 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 China	Mar. 31, 2013 U.S. and state	Mar. 31, 2013 Foreign	Mar. 31, 2012 Foreign France	Mar. 31, 2012 Foreign Spain	Mar. 31, 2013 Domestic Tax Authority [Member] United States
Operating Loss Carryforwards [Line Items]
Net operating loss carry-forwards				$ 333.0	$ 906.5
IRS Sec. 382 limitation on annual amount of NOLs that may be used to offset taxable income	5.0
IRS Sec. 382 limitation on annual amount of NOLs that may be used to offset taxable income, period over which amounts will be used	19 years
Net operating loss carry-forwards, subject to expiration					68.0
Establishment (reversal) of valuation allowance						73.6		85.1
Settlement with Spanish tax authorities							13.4
Undistributed earnings in foreign subsidiaries	58.8	137.3
Witholding taxes for earnings			2.2
Amount of unrecognized tax benefits, if recognized, would affect effective tax rate	30.9	38.3
Accrued interest and penalties on unrecognized tax benefits	1.2	3.0
Removal of uncertain tax benefits in next twelve months that would affect effective tax rate	$ 0.3