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Property Plant and Equipment
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]
Property, Plant and Equipment
Property, plant and equipment is comprised of the following:
 
December 31,
 
Depreciable
Lives (Years)
(dollars in millions)
2012
 
2011
 
Land and rights-of-way
$
49.7

 
$
30.9

 
20
-
Indefinite
Buildings and leasehold improvements
895.9

 
736.2

 
3
-
50
Network equipment
2,858.4

 
2,701.3

 
2
-
50
Office software, furniture, fixtures and vehicles
133.8

 
129.3

 
3
-
14
Construction in process
78.6

 
78.3

 
n/a
 
 
Gross value
4,016.4

 
3,676.0

 
 
 
 
Accumulated depreciation
(2,429.0
)
 
(2,275.5
)
 
 
 
 
Property, plant and equipment, net
$
1,587.4

 
$
1,400.5

 
 
 
 

Depreciation expense on property, plant and equipment was $198.8 million, $180.4 million, and $167.9 million in 2012, 2011, and 2010, respectively. Approximately 87%, 84%, and 82% of "Depreciation," as presented in the Consolidated Statements of Operations in 2012, 2011, and 2010, respectively, was associated with the cost of providing services. There are numerous assets included within network equipment resulting in a range of depreciable lives between 2 and 50 years, the majority of which, however, fall within the range of 9 to 22 years.
During the year ended December 31, 2012, an asset impairment loss of $11.8 million was recognized in the Data Center Colocation segment on certain leasehold improvements at data centers acquired in the GramTel acquisition. Also during 2012, asset impairment losses of $0.4 million and $0.5 million were recognized in the Wireless and Wireline segments, respectively. The Wireless impairment loss was associated with abandoned assets that have no resale market, and the Wireline impairment loss was associated with an out-of-territory fiber network. During 2011, asset impairment losses of $1.1 million and $1.0 million were recognized in the Wireless and Wireline segments, respectively, on abandoned assets that had no resale market. No asset impairment losses were recognized in 2010.
As of December 31, 2012 and 2011, buildings and leasehold improvements, network equipment, and office software, furniture, fixtures and vehicles include $244.1 million and $222.7 million, respectively, of assets accounted for as capital leases or financing arrangements. Amortization of capital lease assets is included in "Depreciation and amortization" in the Consolidated Statements of Operations.