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SHARE-BASED COMPENSATION (Outstanding stock options) (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 29, 2019 shares $ / shares | Dec. 30, 2018 shares $ / shares | Dec. 30, 2018 shares $ / shares $ / shares | Dec. 30, 2018 $ / shares | Dec. 31, 2017 $ / shares | Dec. 31, 2017 $ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Forfeited (in shares) |  | (160,000) | (160,000) |  |  |
Number, outstanding, end of fiscal period (in shares) | 2,219,000 |  |  |  |  |
Weighted average exercise price of share options forfeited in share-based payment arrangement | $ / shares |  |  | $ 33.58 |  |  |
CAD |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Weighted average exercise price of share options outstanding in share-based payment arrangement | $ / shares | $ 35.65 |  |  | $ 33.60 |  | $ 32.94
Number, outstanding, beginning of fiscal period (in shares) | 1,993,000 | 2,263,000 | 2,263,000 |  |  |
Exercised (in shares) | (443,000) | (110,000) | (110,000) |  |  |
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares | $ 26.45 |  | $ 19.98 |  |  |
Number, outstanding, end of fiscal period (in shares) | 1,550,000 | 1,993,000 | 1,993,000 |  |  |
USD |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Weighted average exercise price of share options outstanding in share-based payment arrangement | $ / shares |  | $ 29.01 | $ 29.01 |  | $ 29.01 |
Number, outstanding, beginning of fiscal period (in shares) | 669,000 | 759,000 | 759,000 |  |  |
Granted (in shares) | 0 | (90,000) | (90,000) |  |  |
Weighted average exercise price of share options granted in share-based payment arrangement | $ / shares |  | $ 29.01 |  |  |  |
Number, outstanding, end of fiscal period (in shares) |  | 669,000 | 669,000 |  |  |

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