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Leases (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Leases [Abstract]      
Rent expense on operating leases $ 18.2 $ 19.3 $ 20.6
Operating leases minimum payment in 2015 12.1    
Operating leases minimum payment in 2016 8.1    
Operating leases minimum payment in 2017 6.3    
Operating leases minimum payment in 2018 4.1    
Operating leases minimum payment in 2019 3.2    
Operating leases minimum payment after 2019 $ 4.5