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SHARE-BASED COMPENSATION SHARE-BASED COMPENSATION (Stock options issued and outstanding and exercisable) (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Jan. 02, 2022 shares $ / shares | Jan. 03, 2021 shares | Dec. 29, 2019 shares
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Options exercisable, number (in shares) |  | 1,304,338 |
CAD |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Options issued and outstanding, number (in shares) | 1,236,000 | 1,463,000 | 1,550,000
Options exercisable, number (in shares) | 1,235,845 |  |
CAD | Exercise Price Range One [Member] |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price of outstanding share options | $ / shares | $ 30.46 |  |
Options issued and outstanding, number (in shares) | 43,000 |  |
Weighted average remaining contractual life of outstanding share options | 0 years |  |
Options exercisable, number (in shares) | 43,000 |  |
CAD | Exercise Price Range Two [Member] |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price of outstanding share options | $ / shares | $ 33.01 |  |
Options issued and outstanding, number (in shares) | 463,000 |  |
Weighted average remaining contractual life of outstanding share options | 2 years |  |
Options exercisable, number (in shares) | 463,000 |  |
CAD | Exercise Price Range Three [Member] |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price of outstanding share options | $ / shares | $ 38.01 |  |
Options issued and outstanding, number (in shares) | 447,000 |  |
Weighted average remaining contractual life of outstanding share options | 1 year |  |
Options exercisable, number (in shares) | 447,000 |  |
CAD | Exercise Price Range Four [Member] |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price of outstanding share options | $ / shares | $ 42.27 |  |
Options issued and outstanding, number (in shares) | 283,000 |  |
Weighted average remaining contractual life of outstanding share options | 4 years |  |
Options exercisable, number (in shares) | 283,000 |  |
CAD | CAD Total |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Options issued and outstanding, number (in shares) | 1,236,000 |  |
Options exercisable, number (in shares) | 1,236,000 |  |
CAD | US Total |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Options issued and outstanding, number (in shares) | 3,224,000 |  |
Options exercisable, number (in shares) | 1,670,000 |  |
USD |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Options issued and outstanding, number (in shares) | 1,988,000 | 2,056,000 | 669,000
Options exercisable, number (in shares) | 433,962 | 334,448 |
USD | Exercise Price Range One [Member] |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price of outstanding share options | $ / shares | $ 20.77 |  |
Options issued and outstanding, number (in shares) | 537,000 |  |
Weighted average remaining contractual life of outstanding share options | 6 years |  |
Options exercisable, number (in shares) | 0 |  |
USD | Exercise Price Range Two [Member] |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price of outstanding share options | $ / shares | $ 29.01 |  |
Options issued and outstanding, number (in shares) | 601,000 |  |
Weighted average remaining contractual life of outstanding share options | 3 years |  |
Options exercisable, number (in shares) | 434,000 |  |
USD | Exercise Price Range Three [Member] |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price of outstanding share options | $ / shares | $ 30.00 |  |
Options issued and outstanding, number (in shares) | 850,000 |  |
Weighted average remaining contractual life of outstanding share options | 6 years |  |
Options exercisable, number (in shares) | 0 |  |

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