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POST-EMPLOYMENT BENEFITS - Allocation of Plan Assets (Details) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of fair value of plan assets [line items] |  |
Domestic equity securities | 11.90% | 12.00%
International equity securities | 48.60% | 48.10%
Debt securities | 39.00% | 39.50%
Other - cash | 0.50% | 0.40%
Total | 100.00% | 100.00%
Minimum |  |
Disclosure of fair value of plan assets [line items] |  |
Target asset allocation percentage, Debt securities | 25.00% |
Target asset allocation percentage, Other - cash | 0.00% |
Minimum | Domestic |  |
Disclosure of fair value of plan assets [line items] |  |
Target asset allocation percentage, Equity securities | 8.00% |
Minimum | International |  |
Disclosure of fair value of plan assets [line items] |  |
Target asset allocation percentage, Equity securities | 37.00% |
Maximum |  |
Disclosure of fair value of plan assets [line items] |  |
Target asset allocation percentage, Debt securities | 45.00% |
Target asset allocation percentage, Other - cash | 2.00% |
Maximum | Domestic |  |
Disclosure of fair value of plan assets [line items] |  |
Target asset allocation percentage, Equity securities | 18.00% |
Maximum | International |  |
Disclosure of fair value of plan assets [line items] |  |
Target asset allocation percentage, Equity securities | 67.00% |

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