TYCO INTERNATIONAL LTD | 2013 | FY | 3

Goodwill and Intangible Assets
There were no goodwill impairments as a result of performing the Company's 2013, 2012 and 2011 annual impairment tests. The changes in the carrying amount of goodwill by segment for 2013 and 2012 are as follows ($ in millions):
 
NA Installation
& Services
 
ROW
Installation
& Services
 
Global
Products
 
Total
As of September 30, 2011
 
 
 
 
 
 
 
Gross Goodwill
$
2,119

 
$
2,241

 
$
1,629

 
$
5,989

Impairments
(126
)
 
(1,068
)
 
(567
)
 
(1,761
)
Carrying Amount of Goodwill
1,993

 
1,173

 
1,062

 
4,228

Acquisitions/ Purchase Accounting Adjustments
—

 
38

 
66

 
104

Currency Translation
8

 
26

 
1

 
35

As of September 28, 2012
 
 
 
 
 
 
 
Gross Goodwill
$
2,127

 
$
2,305

 
$
1,696

 
$
6,128

Impairments
(126
)
 
(1,068
)
 
(567
)
 
(1,761
)
Carrying Amount of Goodwill
2,001

 
1,237

 
1,129

 
4,367

Acquisitions/ Purchase Accounting Adjustments
24

 
77

 
90

 
191

Transfers
(39
)
 
—

 
39

 
—

Currency Translation
(8
)
 
(30
)
 
(1
)
 
(39
)
As of September 27, 2013
 
 
 
 
 
 
 
Gross Goodwill
$
2,104

 
$
2,352

 
$
1,824

 
$
6,280

Impairments
(126
)
 
(1,068
)
 
(567
)
 
(1,761
)
Carrying Amount of Goodwill
$
1,978

 
$
1,284

 
$
1,257

 
$
4,519


Intangible Assets
There were no indefinite-lived intangible asset impairments as a result of performing the Company's 2013, 2012 and 2011 annual impairment tests.
The following table sets forth the gross carrying amount and accumulated amortization of the Company's intangible assets as of September 27, 2013 and September 28, 2012 ($ in millions):
 
As of
 
September 27, 2013
 
September 28, 2012
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Gross Carrying
Amount
 
Accumulated
Amortization
Amortizable:
 
 
 
 
 
 
 
Contracts and related customer relationships
$
1,531

 
$
1,199

 
$
1,604

 
$
1,245

Intellectual property
623

 
477

 
552

 
468

Other
40

 
13

 
36

 
9

Total
$
2,194

 
$
1,689

 
$
2,192

 
$
1,722

Non-Amortizable:
 
 
 
 
 
 
 
Intellectual property
$
223

 
 

 
$
224

 
 

Franchise rights
76

 
 

 
77

 
 

Total
$
299

 
 

 
$
301

 
 


Intangible asset amortization expense for 2013, 2012 and 2011 was $99 million, $102 million and $98 million, respectively.
The estimated aggregate amortization expense on intangible assets is expected to be approximately $92 million for 2014, $74 million for 2015, $67 million for 2016, $58 million for 2017 and $214 million for 2018 and thereafter.

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