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Guarantees, Commitments and Contingencies (Details Textual) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2010
Mar. 31, 2007
ScheduledRentIncreases
Guarantees, Commitments and Contingencies (Textual) [Abstract]        
Outstanding letters of credit, performance bonds and similar instruments $ 44.6      
Rent expense under various non-cancellable operating leases 44.4 53.0 48.1  
Cash proceeds from sale of headquarters campus and three undeveloped land parcels, net of closing costs       291.9
Term of lease agreement in connection with the sale of the buildings       15 years
Deferred gain to be amortized over the lease term       24.2
Number of scheduled rent increases over the lease term       5
Capital lease obligations to procure certain equipment, current portion 7.6 7.4    
Capital lease obligations to procure certain equipment, long-term portion 10.5 13.9    
Capital lease obligation, future minimum payments to be made in 2013 8.9      
Capital lease obligation, future minimum payments to be made in 2014 8.3      
Capital lease obligation, future minimum payments to be made in 2015 2.6      
Maximum estimated charge from litigation of foreign tax dispute $ 12