Annual report pursuant to Section 13 and 15(d)

Valuation and Qualifying Accounts (Details)

v2.4.0.6
Valuation and Qualifying Accounts (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
May 31, 2012
May 31, 2011
May 31, 2010
Allowance for Doubtful Accounts [Member]
     
Valuation and Qualifying Accounts      
Balance as of beginning of fiscal year $ 2.1 $ 1.9 $ 4.0
Additions charged to expenses 1.2 1.8 2.6
(Deductions from)/additions to other accounts    0.4   
Costs and deductions 2.1 2.0 4.7
Balance as of end of fiscal year 1.2 2.1 1.9
Reserve for client fund losses [Member]
     
Valuation and Qualifying Accounts      
Balance as of beginning of fiscal year 3.1 2.6 3.2
Additions charged to expenses 2.3 1.9 3.5
(Deductions from)/additions to other accounts (0.7) 1.3   
Costs and deductions 2.6 2.7 4.1
Balance as of end of fiscal year $ 2.1 $ 3.1 $ 2.6