Annual report pursuant to Section 13 and 15(d)

BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3)

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BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (Allowance for doubtful accounts, USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Allowance for doubtful accounts
     
Activity in the allowance for doubtful accounts      
Balance, beginning of year $ 83 $ 48 $ 55
Net charges to costs and expenses 5 56 21
Write-offs (19) (12) (18)
Other (16) (9) (10)
Balance, end of year $ 53 $ 83 $ 48