Quarterly report pursuant to Section 13 or 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
Aug. 31, 2014
May 31, 2014
Components of intangible assets, at cost    
Client lists $ 245.8 $ 240.9
Other intangible assets 3.5 2.6
Total intangible assets, gross 249.3 243.5
Less: Accumulated amortization 206.7 202.9
Intangible assets, net of accumulated amortization 42.6 40.6
Estimated future amortization expense relating to intangible assets    
Fiscal year ending May 31, 2015 14.8  
Fiscal year ending May 31, 2016 11.2  
Fiscal year ending May 31, 2017 8.4  
Fiscal year ending May 31, 2018 5.6  
Fiscal year ending May 31, 2019 $ 3.5