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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill are as follows:

 

  

2014

 

 

2013

 

 

  

(In millions)

 

Beginning balance at January 1

  

$

1,869

 

 

$

2,208

 

Acquisitions

  

 

115

 

 

 

—

 

Dispositions*

  

 

(126

)

 

 

(339

)

Ending balance at December 31

  

$

1,858

 

 

$

1,869

 

 

In 2013, the dispositions include $21 million allocated to other assets sold and $76 million that was classified as held for sale and reported within Other current assets.