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Supplemental Cash Flow Information
12 Months Ended
Dec. 31, 2011
Supplemental Cash Flow Information  
Supplemental Cash Flow Information

21. Supplemental Cash Flow Information

Supplemental cash flow information is as follows (amounts in millions):

   For the Years Ended December 31,
   2011 2010 2009
Supplemental cash flow information:         
 Cash paid for income taxes $317 $255 $257
 Cash paid for interest  4  2  5