Annual report pursuant to Section 13 and 15(d)

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

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Goodwill and Intangible Assets, Net of Accumulated Amortization (Details) (USD $)
In Millions, unless otherwise specified
May 31, 2013
May 31, 2012
Components of intangible assets, at cost    
Client lists $ 231.0 $ 223.6
Other intangible assets 2.4 2.0
Total intangible assets, gross 233.4 225.6
Less: Accumulated amortization 188.2 169.8
Intangible assets, net of accumulated amortization 45.2 55.8
Estimated future amortization expense relating to intangible assets    
Fiscal year ending May 31, 2014 14.9  
Fiscal year ending May 31, 2015 10.8  
Fiscal year ending May 31, 2016 7.7  
Fiscal year ending May 31, 2017 5.5  
Fiscal year ending May 31, 2018 $ 3.5