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PROVISIONS - Narrative (Details) - Environmental rehabilitation - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017
Disclosure of other provisions [line items]
Increase in other provisions	$ 864	$ 850
Discount rate change (as percent)		1.00%
Expected decrease in other provisions with 1% increase in discount rate		$ (385)
Expected increase in other provisions with 1% decrease in discount rate		$ 257

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 37
-IssueDate 2017-01-01
-Paragraph 84
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84&doctype=Standard
-URIDate 2017-03-09

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