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Equity-Accounted Investees - FSE (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Disclosure of equity-accounted investees [line items]
Investment - current year	$ (113.6)	$ (30.8)
Investment in joint ventures	72.5	173.1
Far Southeast Gold Resources Incorporated ("FSE")
Disclosure of equity-accounted investees [line items]
Unlisted shares at cost	230.0	230.0
Equity contribution	97.8	96.8
Impairment - prior years	(116.4)	(85.6)
Share of accumulated losses brought forward	(96.8)	(95.2)
Share of loss after taxation	(1.0)	(1.6)
Investment in joint ventures	$ 0.0	$ 113.6

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

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Investment In Joint Venture Cumulative Impairment, Current Year

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Investment in joint venture cumulative impairment.

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Investment in joint venture equity contribution.

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Investment in joint venture share of accumulated losses brought forward.

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Investment in joint venture share of loss after taxation.

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Investment in joint venture shares at cost.

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The amount of investments in joint ventures accounted for using the equity method. [Refer: Joint ventures [member]; Investments accounted for using equity method]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard
-URIDate 2022-03-24

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