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Goodwill and Other Intangible Assets
12 Months Ended
Sep. 30, 2011
Goodwill and Other Intangible Assets [Abstract] 
Goodwill and Other Intangible Assets
3. Goodwill and Other Intangible Assets
The changes in the carrying amount of goodwill for the years ended September 30, 2011 and 2010 were (in millions):
                         
            Control        
    Architecture &     Products &        
    Software     Solutions     Total  
 
                       
Balance as of September 30, 2009
  $ 386.8     $ 526.4     $ 913.2  
Translation and other
    (1.3 )     0.6       (0.7 )
 
                 
Balance as of September 30, 2010
    385.5       527.0       912.5  
Acquisition of businesses
          34.8       34.8  
Translation and other
    1.2       4.1       5.3  
 
                 
Balance as of September 30, 2011
  $ 386.7     $ 565.9     $ 952.6  
 
                 
Other intangible assets consist of (in millions):
                         
    September 30, 2011  
    Carrying     Accumulated        
    Amount     Amortization     Net  
Amortized intangible assets:
                       
Computer software products
  $ 101.2     $ 45.3     $ 55.9  
Customer relationships
    72.4       23.2       49.2  
Technology
    85.1       44.0       41.1  
Trademarks
    31.2       9.0       22.2  
Other
    21.6       15.7       5.9  
 
                 
Total amortized intangible assets
    311.5       137.2       174.3  
Intangible assets not subject to amortization
    43.7             43.7  
 
                 
Total
  $ 355.2     $ 137.2     $ 218.0  
 
                 
                         
    September 30, 2010  
    Carrying     Accumulated        
    Amount     Amortization     Net  
Amortized intangible assets:
                       
Computer software products
  $ 160.1     $ 107.3     $ 52.8  
Customer relationships
    59.6       16.6       43.0  
Technology
    83.8       38.0       45.8  
Trademarks
    32.5       7.6       24.9  
Other
    23.6       16.5       7.1  
 
                 
Total amortized intangible assets
    359.6       186.0       173.6  
Intangible assets not subject to amortization
    43.7             43.7  
 
                 
Total
  $ 403.3     $ 186.0     $ 217.3  
 
                 
Computer software products represent costs of computer software to be sold, leased or otherwise marketed. Computer software products amortization expense was $16.8 million in 2011, $13.6 million in 2010 and $15.8 million in 2009.
The Allen-Bradley® trademark has an indefinite life, and therefore is not subject to amortization.
Estimated amortization expense is $36.0 million in 2012, $32.3 million in 2013, $27.0 million in 2014, $21.4 million in 2015 and $16.8 million in 2016.
We performed the annual evaluation of our goodwill and indefinite life intangible assets for impairment during the second quarter of 2011 and concluded these assets are not impaired.