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Goodwill and Intangible Assets
9 Months Ended
Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Goodwill and Intangible Assets

Goodwill and intangible assets comprise the following:
 
 
 
June 30,
2014
 
September 30,
2013
 
June 30,
2013
Goodwill (not subject to amortization)
 
$
2,885.1

 
$
2,871.0

 
$
2,834.0

Intangible assets:
 
 
 
 
 
 
Customer relationships, noncompete agreements and other
 
$
717.3

 
$
706.4

 
$
692.6

Trademarks and tradenames (not subject to amortization)
 
132.0

 
131.3

 
128.4

     Gross carrying amount
 
849.3

 
837.7

 
821.0

     Accumulated amortization
 
(259.0
)
 
(227.1
)
 
(212.4
)
       Intangible assets, net
 
$
590.3

 
$
610.6

 
$
608.6


We amortize customer relationship and noncompete agreement intangible assets over their estimated periods of benefit which do not exceed 15 years. Amortization expense of intangible assets was $13.3 and $35.5 in the three and nine months ended June 30, 2014, respectively, and $13.3 and $40.2 in the three and nine months ended June 30, 2013, respectively. No amortization is included in cost of sales in the Condensed Consolidated Statements of Income. As of June 30, 2014, our expected aggregate amortization expense of intangible assets for the remainder of Fiscal 2014 and for the next four fiscal years is as follows: remainder of Fiscal 2014$13.1; Fiscal 2015$50.6; Fiscal 2016$44.2; Fiscal 2017$37.6; Fiscal 2018$36.3.