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Company Restructuring (Tables)
 12 Months Ended
Dec. 31, 2013
Company Restructuring  
Schedule of changes in the restructuring liability

 

 

($ in millions)
   Employee
costs		   Exit
costs		   Total
liability		  

Balance as of December 31, 2012

   $ 6   $ 3   $ 9  

Expense incurred

     45     5     50  

Adjustments to liability

     (2 )   —     (2 )

Payments applied against liability

     (28 )   (5 )   (33 )
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Balance as of December 31, 2013

   $ 21   $ 3   $ 24  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
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