XML 124 R108.htm IDEA: XBRL DOCUMENT
v3.8.0.1

EARNINGS PER SHARE (Narrative) (Details) - shares | 12 Months Ended
--- | ---
Dec. 31, 2017 | Jan. 01, 2017
Stock options |  |
Earnings per share [line items] |  |
Shares excluded from calculation of earnings per share (in shares) | 1,903,101 | 1,572,273
Treasury RSUs |  |
Earnings per share [line items] |  |
Shares excluded from calculation of earnings per share (in shares) | 0 | 7,500

X
- Definition Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount1 + References No definition available. + Details
Name: | gil_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount1
Namespace Prefix: | gil_
Data Type: | xbrli:sharesItemType
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_EarningsPerShareLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | gil_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities1Axis=gil_EmployeeStockOption1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | gil_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities1Axis=gil_TreasuryRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |