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Acquisitions and Dispositions (Tables)
 3 Months Ended
Mar. 31, 2015
Business Combinations [Abstract]  
Consideration transferred and preliminary value of intangible assets
The following table includes the aggregate consideration transferred and the preliminary value of intangible assets recorded as a result of the Company's acquisitions (in millions):
 
 
Three months ended March 31,
 
 
2015
 
2014
Consideration
 
$
21

 
$
5

Intangible assets:
 
 

 
 

Goodwill
 
$
16

 
$
4

Other intangible assets
 
1

 
4

     Total
 
$
17

 
$
8