Quarterly report pursuant to Section 13 or 15(d)

Investments (Details 1)

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Investments (Details 1) (Accolade [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2012
Nov. 30, 2011
Accolade [Member]
       
Related Party Transaction [Line Items]        
Amounts sold to or related to services performed for Accolade $ 21.8 $ 18.4 $ 70.3 $ 70.5
Amounts purchased from or related to services performed by Accolade $ 3.7 $ 8.3 $ 11.5 $ 20.8