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EMPLOYEE BENEFIT PLANS - Expense for Defined Contribution Plans, excluding discussed ESOP plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Jan. 02, 2021 | Dec. 28, 2019 | Dec. 29, 2018
Retirement Benefits [Abstract] |  |  |
Multi-employer plan expense | $ 7.8 | $ 7.2 | $ 7.3
Other defined contribution plan expense | $ 29.7 | $ 36.2 | $ 12.9

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