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Other Intangible Assets
12 Months Ended
Dec. 31, 2011
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Other Intangible Assets
Other Intangible Assets

Other intangible assets consist of the following:
 
December 31,
 
2011
 
2010
 
(In millions)
Customer relationships and contracts
$
196.4

 
$
234.5

Other
47.8

 
46.8

 
244.2

 
281.3

Accumulated amortization
(113.5
)
 
(126.1
)
 
$
130.7

 
$
155.2



Amortization expense for amortizable intangible assets, which consist primarily of customer relationships, was $16.5 million, $19.1 million, and $22.1 million for the years ended December 31, 2011, 2010, and 2009, respectively. Other intangible assets primarily represent non-amortizable intangible assets such as trademarks and licenses. Estimated amortization expense for the next five years for assets owned at December 31, 2011, is $18.3 million in 2012, $14.3 million in 2013, $11.5 million in 2014, $10.5 million in 2015 and $9.4 million in 2016.