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ASSETS IMPAIRMENTS AND RESTRUCTURING (Tables) | 9 Months Ended
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Sep. 30, 2018
Restructuring Costs and Asset Impairment Charges [Abstract] |
Schedule of Restructuring Reserve by Type of Cost [Table Text Block] | The following table summarizes the changes in asset impairments and restructuring charges and gains, the non-cash reductions attributable to asset impairments, and the cash reductions in restructuring reserves for severance costs and site closure costs paid in first nine months 2018 and full year 2017:
(Dollars in millions) | Balance at January 1, 2018 |  | Provision/ Adjustments |  | Non-cash Reductions/ Additions |  | Cash Reductions |  | Balance at September 30, 2018
Severance costs | $ | 19 |  |  | $ | 6 |  |  | $ | — |  |  | $ | (17 | ) |  | $ | 8 |
Site closure and restructuring costs | 10 |  |  | — |  |  | — |  |  | (1 | ) |  | 9 |
Total | $ | 29 |  |  | $ | 6 |  |  | $ | — |  |  | $ | (18 | ) |  | $ | 17 |
(Dollars in millions) | Balance at January 1, 2017 |  | Provision/ Adjustments |  | Non-cash Reductions/ Additions |  | Cash Reductions |  | Balance at December 31, 2017
Non-cash charges | $ | — |  |  | $ | 1 |  |  | $ | (1 | ) |  | $ | — |  |  | $ | — |
Severance costs | 42 |  |  | 6 |  |  | — |  |  | (29 | ) |  | 19 |
Site closure and restructuring costs | 13 |  |  | 1 |  |  | 1 |  |  | (5 | ) |  | 10 |
Total | $ | 55 |  |  | $ | 8 |  |  | $ | — |  |  | $ | (34 | ) |  | $ | 29 |

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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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