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Commitments and Contingencies - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) t | Dec. 31, 2019 USD ($) t
Disclosure of Commitments and Contingencies [Line Items] |  |
Capital commitment relating to the construction of factory building improvement and acquisition of machinery | $ 2.5 | $ 5.8
Corporate guarantee | 17.0 | 38.5
Commitments in respect of management consulting services with related parties | 0.1 | 0.3
Bottom of range [Member] |  |
Disclosure of Commitments and Contingencies [Line Items] |  |
Commitments to purchase raw materials | $ 194.0 | $ 200.0
Commitments to purchase raw materials, metric tons | t | 28,736 | 20,996
Top of range [Member] |  |
Disclosure of Commitments and Contingencies [Line Items] |  |
Commitments to purchase raw materials | $ 251.0 | $ 290.0
Commitments to purchase raw materials, metric tons | t | 35,946 | 30,580
Contingent liability for guarantees | Top of range [Member] |  |
Disclosure of Commitments and Contingencies [Line Items] |  |
Corporate guarantee | $ 25.1 | $ 24.7

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- Definition Contractual commitments for acquisition of raw materials. + References No definition available. + Details
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- Definition Contractual commitments for acquisition of raw materials amount. + References No definition available. + Details
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- Definition Disclosure of commitments and contingencies. + References No definition available. + Details
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- Definition The amount of related-party commitments made by the entity to do something if a particular event occurs or does not occur in the future, including executory contracts (recognised and unrecognised). [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2020-01-01 -Paragraph 21 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_21_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of contractual commitments for the acquisition of property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 74 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_74_c&doctype=Standard -URIDate 2020-01-01 + Details
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