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Cost Reduction Initiatives (Tables)
12 Months Ended
Dec. 31, 2011
Cost Reduction Initiatives (Tables)  
Remaining Accrual
   Total
   (in millions)
 Balance as of December 31, 2010 $17
 Incurred   -
 Settled   (15)
 Adjustments   (2)
 Balance as of December 31, 2011 $ -