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16. SUPPLY CHAIN FINANCE (Details Narratives)
Dec. 31, 2020
Dec. 31, 2019
Domestic suppliers [member] | Bottom of range [member]    
DisclosureOfSupplyChainFinanceLineItems [Line Items]    
Discount rates applied on transactions 0.38% 0.38%
Domestic suppliers [member] | Top Of Range [member]    
DisclosureOfSupplyChainFinanceLineItems [Line Items]    
Discount rates applied on transactions 0.47% 0.67%
Foreign suppliers [member] | Bottom of range [member]    
DisclosureOfSupplyChainFinanceLineItems [Line Items]    
Discount rates applied on transactions 0.18% 0.32%
Foreign suppliers [member] | Top Of Range [member]    
DisclosureOfSupplyChainFinanceLineItems [Line Items]    
Discount rates applied on transactions 0.40% 0.46%