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Acquisitions and Other Significant Transactions (Tables)
15 Months Ended
Jan. 31, 2012
Acquisitions, Divestitures and Other Significant Transactions [Abstract]  
Acquisitions
      September 30,       September 30,       September 30,       September 30,       September 30,  
                January 31, 2012  
    # of
Acquisitions
    Purchase Price,
net of cash
    Tangible
Assets, net
    Intangible
Assets
    Goodwill  

Total 2012 Acquisitions

    0     $ 0     $ 0     $ 0     $ 0  

Total 2011 Acquisitions

    8     $ 344.9     $ 106.9     $ 74.6     $ 282.9