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BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details)	12 Months Ended
	Dec. 31, 2019
Plant and machinery [Member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment
Useful life measured as period of time, property, plant and equipment	3 years
Plant and machinery [Member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment
Useful life measured as period of time, property, plant and equipment	13 years
Mobile equipment [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment
Useful life measured as period of time, property, plant and equipment	5 years
Mobile equipment [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment
Useful life measured as period of time, property, plant and equipment	7 years

X

- Definition

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.

+ References

No definition available.

+ Details

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X

- Definition

The useful life, measured as period of time, used for property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2019-01-01
-Paragraph 73
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_c&doctype=Standard
-URIDate 2019-03-27

+ Details

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- Details

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X

- Details

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X

- Details

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