Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Accounts and Other Receivables (Details)

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Accounts and Other Receivables (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Components of accounts and other receivables    
Trade receivables $ 123.3 $ 118.3
Other receivables and advances 16.7 22.5
Allowance for doubtful accounts (2.3) (2.7)
Total accounts and other receivables 137.7 138.1
Allowance for doubtful accounts    
Balance at beginning of period 2.7 2.3
Charged to expense   0.4
Recoveries (0.4)  
Balance at end of period $ 2.3 $ 2.7