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SHARE-BASED COMPENSATION (Stock options and restricted share units Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 29, 2019 USD ($) shares $ / shares | Dec. 29, 2019 shares $ / shares $ / shares | Dec. 30, 2018 USD ($) shares | Dec. 30, 2018 shares $ / shares | Dec. 29, 2019 shares $ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Number of common shares issuable pursuant to the exercise of stock options and vesting of Treasury RSUs for the plan (in shares) | 12,000,632 | 12,000,632 |  |  | 12,000,632
Number of shares remained authorized for future issuance under the plan (in shares) | 1,505,829 | 1,505,829 |  |  | 1,505,829
Outstanding options exercisable (in shares) | 990,000 | 990,000 |  | 915,628 | 990,000
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ / shares |  |  |  | $ 30.22 | $ 34.02
Compensation expense included in selling, general and administrative expenses and cost of sales | $ | $ 16,272,000 |  | $ 19,974,000 |  |
Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise | $ / shares |  | $ 47.24 |  | $ 39.79 |
Treasury RSUs |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Vesting period | 5 years |  |  |  |
Percentage of awards contingent on achievement of performance conditions | 50.00% |  |  |  |
Number of outstanding shares vested (in shares) | 0 |  | 0 |  |
Compensation expense included in selling, general and administrative expenses and cost of sales | $ | $ 600,000 |  | $ 500,000 |  |
Stock options |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Compensation expense included in selling, general and administrative expenses and cost of sales | $ | $ 2,600,000 |  | $ 2,900,000 |  |
Non-Treasury RSUs |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
Number of outstanding shares vested (in shares) | 0 |  | 0 |  |
Compensation expense included in selling, general and administrative expenses and cost of sales | $ | $ 12,880,000.0 |  | $ 16,380,000.0 |  |
Percentage of awards dependent on performance conditions | 100.00% |  |  |  |
Ratio of awards that can vest to the actual number of shares awarded | 2 |  |  |  |
CAD |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Outstanding options exercisable (in shares) | 822,394 | 822,394 |  |  | 822,394
USD |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Outstanding options exercisable (in shares) | 167,224 | 167,224 |  | 0 | 167,224
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ / shares | $ 29.01 | $ 29.01 |  |  |
Shares granted (in shares) | 0 |  | (90,000) |  |

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