Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets, Net of Accumulated Amortization (Details)

v2.4.0.6
Goodwill and Intangible Assets, Net of Accumulated Amortization (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Feb. 29, 2012
May 31, 2011
Components of intangible assets, at cost    
Client lists $ 223.3 $ 223.4
Other intangible assets 2.0 2.0
Total intangible assets, gross 225.3 225.4
Less: Accumulated amortization 164.1 148.2
Intangible assets, net of accumulated amortization 61.2 77.2
Estimated future amortization expense relating to intangible asset balances    
2012 22.9  
2013 18.0  
2014 13.0  
2015 9.2  
2016 $ 6.4