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Restructuring And Impairments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 24 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Reduction in global workforce, percentage 19.00%   57.00%
Employee severance and benefit costs $ 2.5 $ 5.3  
Fair value of remaining lease payments 0.4   0.4
Facility exit costs   0.3  
Asset impairment charge $ 5.0 $ 1.7  
Beijing, China [Member]
      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Space to be vacated, square feet 8,200   8,200
Klagenfurt, Austria [Member]
      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Space to be vacated, square feet 4,000 8,937 4,000
Middleton, WI [Member]
      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Space to be vacated, square feet   33,000  
Nuremburg, Germany [Member]
      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Space to be vacated, square feet   3,300