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Summary of Significant Accounting Policies - Summary of Expected Useful Lives (Detail) | 12 Months Ended
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Dec. 31, 2021
Bottom of range |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 7 years
Bottom of range | Buildings and equipment (not used in production) |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 1 year
Bottom of range | Plant and equipment (smelting operations) |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 3 years
Top of range |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 40 years
Top of range | Buildings and equipment (not used in production) |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 43 years
Top of range | Plant and equipment (smelting operations) |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 30 years

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2021-01-01 -Paragraph 118 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2021-en-r&anchor=para_118_a&doctype=Standard -URIDate 2021-03-24 + Details
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