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 6 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2012
Aug. 31, 2011
Accolade [Member]
       
Related Party Transaction [Line Items]        
Amounts sold to or related to services performed for related party $ 24.0 $ 22.6 $ 48.5 $ 49.6
Amounts purchased from or related to services performed by related party $ 3.8 $ 4.7 $ 7.8 $ 8.0