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Goodwill and Other Intangible Assets
3 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets
Changes in the carrying amount of goodwill for the three months ended December 31, 2015 are (in millions):
 
Architecture &
Software
 
Control
Products &
Solutions
 
Total
Balance as of September 30, 2015
$
388.0

 
$
640.8

 
$
1,028.8

Translation
(1.5
)
 
(7.4
)
 
(8.9
)
Balance as of December 31, 2015
$
386.5

 
$
633.4

 
$
1,019.9


Other intangible assets consist of (in millions):
 
December 31, 2015
 
Carrying
Amount
 
Accumulated
Amortization
 
Net
Amortized intangible assets:
 
 
 
 
 
Computer software products
$
182.4

 
$
95.0

 
$
87.4

Customer relationships
85.5

 
50.7

 
34.8

Technology
82.8

 
45.5

 
37.3

Trademarks
31.8

 
16.7

 
15.1

Other
11.3

 
8.6

 
2.7

Total amortized intangible assets
393.8

 
216.5

 
177.3

Intangible assets not subject to amortization
43.7

 

 
43.7

Total
$
437.5

 
$
216.5

 
$
221.0

 
September 30, 2015
 
Carrying
Amount
 
Accumulated
Amortization
 
Net
Amortized intangible assets:
 
 
 
 
 
Computer software products
$
182.4

 
$
91.9

 
$
90.5

Customer relationships
87.2

 
50.1

 
37.1

Technology
83.4

 
44.1

 
39.3

Trademarks
32.3

 
16.3

 
16.0

Other
11.5

 
8.6

 
2.9

Total amortized intangible assets
396.8

 
211.0

 
185.8

Intangible assets not subject to amortization
43.7

 

 
43.7

Total
$
440.5

 
$
211.0

 
$
229.5


The Allen-Bradley® trademark has an indefinite life and therefore is not subject to amortization.
Estimated amortization expense is $29.1 million in 2016, $25.9 million in 2017, $19.8 million in 2018, $17.2 million in 2019 and $14.4 million in 2020.
We perform the annual evaluation of our goodwill and indefinite life intangible assets for impairment as required by accounting principles generally accepted in the United States (U.S. GAAP) during the second quarter of each year.