XML 112 R96.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SHARE-BASED COMPENSATION SHARE-BASED COMPENSATION (Outstanding DSUs) (Details) - DSUs - shares | 12 Months Ended
--- | ---
Dec. 31, 2017 | Jan. 01, 2017
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Number, outstanding, beginning of fiscal year (in shares) | 255,472 | 226,000
Granted (in shares) | 35,000 | 36,000
Granted for dividends declared (in shares) | 3,000 | 2,000
Forfeited (in shares) | 0 | 9,000
Number, outstanding, end of fiscal year (in shares) | 292,873 | 255,472

X
- Definition Number Of Other Equity Instruments Granted, Excluding Granted For Dividends Declared + References No definition available. + Details
Name: | gil_NumberOfOtherEquityInstrumentsGrantedExcludingGrantedForDividendsDeclared
Namespace Prefix: | gil_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Other Equity Instruments, Granted For Dividends Declared + References No definition available. + Details
Name: | gil_NumberOfOtherEquityInstrumentsGrantedForDividendsDeclared
Namespace Prefix: | gil_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=gil_DeferredShareUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |