BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Activity in the allowance for doubtful accounts | |||
| Balance at beginning of year | $ 477 | $ 466 | $ 352 |
| Net charges to costs and expenses | 29 | 32 | 126 |
| Write-offs | (4) | (10) | (10) |
| Other | (13) | (11) | (2) |
| Balance at end of year | $ 489 | $ 477 | $ 466 |
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of valuation and qualifying accounts and reserves. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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