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EMPLOYEE BENEFITS - Defined benefit pension plan - Assumptions used to calculate defined benefit plans (Details) - Defined benefit pension plan | Dec. 31, 2020 | Dec. 31, 2019
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Brazil |  |
Summary of assumptions used to calculate the defined benefit plans |  |
Average discount rate | 6.56% | 7.16%
North America |  |
Summary of assumptions used to calculate the defined benefit plans |  |
Rate of increase in compensation | 3.00% | 3.00%
North America | Minimum |  |
Summary of assumptions used to calculate the defined benefit plans |  |
Average discount rate | 2.25% | 3.00%
North America | Maximum |  |
Summary of assumptions used to calculate the defined benefit plans |  |
Average discount rate | 2.50% | 3.25%

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- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_144&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_144&doctype=Standard -URIDate 2020-01-01 + Details
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