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Restructuring Charges
6 Months Ended
Jun. 30, 2011
Restructuring Charges [Abstract]  
Restructuring Charges
 
4.  Restructuring Charges
 
During the fourth quarter of 2010, the Company committed to a strategic initiative to rationalize certain centralized functions. Substantially all of the costs incurred were personnel related, and the plan is expected to be completed during 2011.
 
The recognition of restructuring charges and the corresponding utilization of accrued balances during the six months ended June 30, 2011 are summarized as follows:
 
         
(in $ millions)      
 
Balance as of January 1, 2011
    9  
Restructuring charges
    4  
Cash payments
    (9 )
         
Balance as of June 30, 2011
    4  
         
 
Additionally, the Company expects to incur approximately $1 million of restructuring charges for personnel related costs during the remainder of 2011.