DIVIDENDS (Details) $ / shares in Units, $ in Millions					12 Months Ended
Mar. 27, 2020 $ / shares	Feb. 21, 2020 R / shares	Feb. 19, 2019 R / shares	Feb. 19, 2019 $ / shares	Feb. 20, 2018 R / shares	Feb. 20, 2018 $ / shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Disclosure of share capital, reserves and other equity interest [Abstract]
Dividends declared (USD per share) \| (per share)	$ 0.09	R 1.65	R 0.95	$ 0.07	R 0.70	$ 0.06
Dividends paid							$ 38	$ 27	$ 24

Disclosure of share capital, reserves and other equity interest [Abstract]

No definition available.

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- Definition

The amount of dividends paid by the entity on ordinary shares. [Refer: Ordinary shares [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 34
-IssueDate 2020-01-01
-Paragraph 16A
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=34&code=ifrs-tx-2020-en-r&anchor=para_16A_f&doctype=Standard
-URIDate 2020-01-01

+ Details

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- Definition

The amount, per share, of dividends proposed or declared before financial statements were authorised for issue but not recognised as distribution to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 137
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_137_a&doctype=Standard
-URIDate 2020-01-01

+ Details

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