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
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Activity in the allowance for doubtful accounts      
Balance at beginning of year $ 331 $ 61 $ 53
Net charges to costs and expenses 45 308 30
Write-offs (10) (13) (14)
Other (14) (25) (8)
Balance at end of year $ 352 $ 331 $ 61