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PENSOION AND OTHER POSTRETIREMENT BENEFITS 4 (Details) | Dec. 31, 2020
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Fixed Income Securities [Member] | Minimum [Member] |
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items] |
Target allocations percentage | 55.00%
Fixed Income Securities [Member] | Maximum [Member] |
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items] |
Target allocations percentage | 70.00%
Equity Securities [Member] | Minimum [Member] |
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items] |
Target allocations percentage | 25.00%
Equity Securities [Member] | Maximum [Member] |
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items] |
Target allocations percentage | 40.00%
Real Estate [Member] | Minimum [Member] |
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items] |
Target allocations percentage | 5.00%
Real Estate [Member] | Maximum [Member] |
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items] |
Target allocations percentage | 10.00%
Other than Securities Investment [Member] | Minimum [Member] |
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items] |
Target allocations percentage | 10.00%
Other than Securities Investment [Member] | Maximum [Member] |
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items] |
Target allocations percentage | 20.00%

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