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EMPLOYEE BENEFIT PLANS - Asset allocation (Details) - Defined Benefit Pension Items [Member] | Dec. 31, 2019 | Dec. 31, 2018
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ASSET CATEGORY: |  |
Asset allocations | 100.00% | 100.00%
Cash and Cash Equivalents [Member] |  |
ASSET CATEGORY: |  |
Asset allocations | 1.00% | 49.00%
Domestic equities [Member] |  |
ASSET CATEGORY: |  |
Asset allocations | 8.00% | 7.00%
Mutual funds/ETFs |  |
ASSET CATEGORY: |  |
Asset allocations | 82.00% | 42.00%
International equities |  |
ASSET CATEGORY: |  |
Asset allocations | 1.00% | 0.00%
Corporate bonds |  |
ASSET CATEGORY: |  |
Asset allocations | 8.00% | 2.00%

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- References No definition available. + Details
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- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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