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Trade and Other Receivables - Schedule of Trade and Other Receivables (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Trade and Other Receivables [line items]
Derivative Financial Assets	$ 113.3	$ 1.1
Tarkwa [member]
Trade and Other Receivables [line items]
Provision for expected Credit Loss was raised against Receivables	$ 29.0
Trade And Other Receivable [Member]
Trade and Other Receivables [line items]
Derivative Financial Assets		$ 1.1

X

- Definition

Trade and other receivables.

+ References

No definition available.

+ Details

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X

- Definition

The amount of derivative financial assets held for hedging. [Refer: Derivative financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard
-URIDate 2020-01-01

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X

- Definition

The maximum exposure to the credit risk of loans or receivables. [Refer: Loans and receivables; Credit risk [member]; Maximum exposure to credit risk]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 9
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_9_a&doctype=Standard&book=b
-URIDate 2020-01-01

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- Details

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