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Goodwill, Spectrum Licenses and Intangible Assets
9 Months Ended
Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill, Spectrum Licenses, and Intangible Assets
Note 5 – Goodwill, Spectrum Licenses and Intangible Assets

Goodwill and Spectrum Licenses

Carrying values of goodwill and spectrum licenses were as follows:
(in millions)
September 30,
2013
 
December 31,
2012
Goodwill
$
1,683

 
$

Spectrum licenses
18,414

 
14,550


Goodwill and spectrum licenses include $1.7 billion and $3.8 billion, respectively, based on preliminary fair values, acquired through the business combination with MetroPCS. See Note 2 – Transaction with MetroPCS for further information.
  
Other Intangible Assets

The components of intangible assets were as follows:
(in millions)
Useful Lives
 
September 30,
2013
 
December 31,
2012
Customer lists
1 - 6 years
 
$
1,313

 
$
209

Trademarks
1 - 8 years
 
291

 
55

Other
Up to 28 years
 
97

 
58

Accumulated amortization
 
 
(404
)
 
(243
)
Other intangible assets, net
 
 
$
1,297

 
$
79



Customer lists, trademarks and other intangible assets include $1.1 billion, $233 million and $39 million respectively, based on preliminary fair values, related to the business combination with MetroPCS. See Note 2 – Transaction with MetroPCS for further information. Estimated aggregate future amortization expense for intangible assets subject to amortization are $92 million for the three months ended December 31, 2013, $333 million in 2014, $278 million in 2015, $222 million in 2016, $163 million in 2017 and $209 million thereafter.