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Goodwill and Intangible Assets (Tables)
 9 Months Ended
Jun. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Component of company's intangible assets
Goodwill and intangible assets comprise the following:
 
 
 
June 30,
2013
 
September 30,
2012
 
June 30,
2012
Goodwill (not subject to amortization)
 
$
2,834.0

 
$
2,818.3

 
$
2,756.0

Intangible assets:
 
 
 
 
 
 
Customer relationships, noncompete agreements and other
 
$
692.6

 
$
691.9

 
$
689.3

Trademarks and tradenames (not subject to amortization)
 
128.4

 
137.2

 
189.6

     Gross carrying amount
 
821.0

 
829.1

 
878.9

     Accumulated amortization
 
(212.4
)
 
(170.9
)
 
(161.2
)
       Intangible assets, net
 
$
608.6

 
$
658.2

 
$
717.7