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FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
TAM S.A [Member] | Bottom of range [member]    
FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis [Line Items]    
Appreciation (depreciation) of R$ /US$   (10.00%)
Positions effect on equity $ 9,500 $ 39,800
TAM S.A [Member] | Top of range [member]    
FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis [Line Items]    
Appreciation (depreciation) of R$ /US$   10.00%
Positions effect on equity (9,500) $ (39,800)
TAM S.A. and Subsidiaries [Member] | Bottom of range [member]    
FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis [Line Items]    
Appreciation (depreciation) of R$ /US$   (10.00%)
Positions effect on equity 402,480 $ 384,730
TAM S.A. and Subsidiaries [Member] | Top of range [member]    
FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis [Line Items]    
Appreciation (depreciation) of R$ /US$   10.00%
Positions effect on equity (329,290) $ (314,780)
Foreign Exchange Rate Risk [Member] | Bottom of range [member]    
FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis [Line Items]    
Appreciation (depreciation) of R$ /US$   (10.00%)
Positions effect on equity (600)  
Foreign Exchange Rate Risk [Member] | Top of range [member]    
FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis [Line Items]    
Appreciation (depreciation) of R$ /US$   10.00%
Positions effect on equity $ 1,100