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SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS
12 Months Ended
Dec. 31, 2012
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS

(In millions)

 

Column A

   Column B      Column C      Column D      Column E  

Description

   Balance at
Beginning
of Period
     Additions
Charged
to Costs &
Expenses
     Charged
to Other
Accounts*
     Deductions      Balance
at End of
Period
 

Allowance for doubtful accounts

              

Year ended December 31, 2012

   $ 13       $ 2       $ 3       $ 0       $ 18   

Year ended December 31, 2011

   $ 9       $ 5       $ 0       $ 1       $ 13   

Year ended December 31, 2010

   $ 9       $ 0       $ 0       $ 0       $ 9   

 

* The allowance for doubtful accounts increased by $3 million for the year ended December 31, 2012 due to reserves from acquired entities which were closed during the period.