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           Legal and settlement expense (recovery), net (Tables) 
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        12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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           Sep. 30, 2012 
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| Schedule of matters representing legal and settlement expense (recoveries), net | 
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- Details 
          
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- Definition 
          Tabular disclosure of legal and settlement expense (recovery), net consists of costs, net of reimbursed insurance claims, related to acquisitions, significant legal settlements and non-routine legal matters, including future probable legal costs estimated to be incurred in connection with those matters. No definition available. 
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