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SIGNIFICANT ACCOUNTING POLICIES (Ownership percentage of principal subsidiaries) (Details) | 12 Months Ended
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Dec. 29, 2024 | Dec. 31, 2022
Gildan Activewear SRL |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Yarns, LLC |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan USA LLC |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Honduras Properties, S. de R.L. |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Activewear (UK) Limited |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Activewear EU SRL |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Textiles de Sula, S. de R.L. |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
G.A.B. Limited |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
SDS International Limited |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage |  | 100.00%
Gildan Activewear (Eden) Inc. |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Hosiery Rio Nance, S. de R.L. |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Mayan Textiles, S. de R.L. |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Charleston Inc. |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Activewear Dominican Republic Textile Company Inc. |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |
Gildan Choloma Textiles, S. de R. L. |  |
Disclosure of subsidiaries [line items] |  |
Ownership percentage | 100.00% |

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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 proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Total for all subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2024-01-01 -Paragraph 19B -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2024-03-27 + Details
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