OTHER INCOME AND EXPENSE - Other expense - Additional information (Details)	Dec. 31, 2018
Concesionaria Ruta Del Sol S.A.S. [Member]
Disclosure of joint ventures [line items]
Investment provisioned (as a percent)	100.00%

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration