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Intangible Assets
12 Months Ended
Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets

11.  INTANGIBLE ASSETS

The table below provides details of acquired intangible assets:

    30 September 2013    30 September 2012 
      Accumulated        Accumulated   
   Gross  Amortization  Net  Gross  Amortization  Net
Customer relationships $ 629.2 $ (97.3) $ 531.9 $ 665.3 $ (93.1) $ 572.2
Patents and technology   91.3   (52.1)   39.2   129.8   (82.0)   47.8
Other   91.5   (35.9)   55.6   82.3   (38.4)   43.9
Trade names and trademarks   90.6   -   90.6   97.7   -   97.7
  $ 902.6 $ (185.3) $ 717.3 $ 975.1 $ (213.5) $ 761.6
                   
Refer to Note 1, Major Accounting Policies, for amortization periods associated with our intangible assets.

Amortization expense for intangible assets was $42.3, $27.1, and $22.6 in 2013, 2012, and 2011, respectively.

Projected annual amortization expense for intangible assets as of 30 September 2013 is as follows:  
   
2014$41.9
2015 40.1
2016 38.0
2017 36.6
2018 34.8
Thereafter 435.3
 $626.7