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EQUITY AND NONCONTROLLING INTERESTS - Narrative (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 26, 2021 | Jun. 27, 2020 | Jun. 26, 2021 | Jun. 27, 2020 | Feb. 29, 2020 | Dec. 28, 2019 | Apr. 29, 2019
Vital River |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |
Equity interest |  |  |  |  |  | 92.00% |
Noncontrolling interest ownership percentage | 8.00% |  | 8.00% |  |  |  |
Citoxlab |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |
Equity interest |  |  |  |  |  | 90.00% |
Noncontrolling interest ownership percentage |  |  |  |  |  | 10.00% | 10.00%
Supplier |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |
Equity interest |  |  |  |  |  | 80.00% |
Noncontrolling interest ownership percentage |  |  |  |  |  | 20.00% |
Employee Stock Option |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share amount (in shares) | 0.2 | 0.6 | 0.2 | 0.6 |  |  |
Restricted Stock and Restricted Stock Units |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share amount (in shares) |  |  | 0.7 | 0.9 |  |  |
Vital River |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |
Contractually defined redemption value | $ 20.9 |  | $ 20.9 |  |  |  |
Citoxlab |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |
Contractually defined redemption value |  |  |  |  | $ 4.0 |  |

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