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SUMMARY OF QUANTITATIVE INFORMATION ABOUT LEVEL 3 FAIR VALUE MEASUREMENTS OF POST-EMPLOYMENT BENEFITS (Details) - Fair Value, Inputs, Level 3 [Member] | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |
Discount Rate | 5.98% | 4.93%
Expected Return on Plan Assets |  | 4.93%
Wage Increase Rate | 7.00% | 9.00%
Disability Rate | 5.00% | 5.00%
Normal retirement age | 58 years | 58 years
Age 20 - 29 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Withdrawal Rate | 5.00% | 5.00%
Age 30 - 39 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Withdrawal Rate | 4.00% | 4.00%
Age 40 - 44 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Withdrawal Rate | 3.00% | 3.00%
Age 45 - 49 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Withdrawal Rate | 2.00% | 2.00%
Age 50 - 57 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Withdrawal Rate | 1.00% | 1.00%
Age > 57 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Withdrawal Rate | 0.00% | 0.00%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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