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ASSETS IMPAIRMENTS AND RESTRUCTURING | 3 Months Ended
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Mar. 31, 2018
Restructuring Costs and Asset Impairment Charges [Abstract] |
ASSET IMPAIRMENTS AND RESTRUCTURING | ASSET IMPAIRMENTS AND RESTRUCTURING CHARGES, NET
In first quarter 2018, the Company recognized restructuring charges of $2 million for corporate severance. There were no asset impairments and restructuring charges in first quarter 2017. Changes in Reserves 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 three months 2018 and full year 2017:
(Dollars in millions) | Balance at January 1, 2018 |  | Provision/ Adjustments |  | Non-cash Reductions/ Additions |  | Cash Reductions |  | Balance at March 31, 2018
Severance costs | $ | 19 |  |  | $ | 2 |  |  | $ | — |  |  | $ | (3 | ) |  | $ | 18 |
Site closure and restructuring costs | 10 |  |  | — |  |  | — |  |  | — |  |  | 10 |
Total | $ | 29 |  |  | $ | 2 |  |  | $ | — |  |  | $ | (3 | ) |  | $ | 28 |
(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 |
Substantially all severance costs remaining are expected to be applied to the reserves within one year.

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- Definition The entire disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References No definition available. + Details
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