XML 119 R102.htm IDEA: XBRL DOCUMENT
v3.10.0.1

SUPPLEMENTARY INFORMATION RELATING TO THE NATURE OF EXPENSES (Government assistance) (Details) - USD ($) $ in Millions | Dec. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Analysis of income and expense [abstract] |  |
Government assistance | $ 10.1 | $ 10.2

X
- Definition Income From Government Grants And Tax Credits + References No definition available. + Details
Name: | gil_IncomeFromGovernmentGrantsAndTaxCredits
Namespace Prefix: | gil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | ifrs-full_AnalysisOfIncomeAndExpenseAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration