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EQUITY AND NONCONTROLLING INTERESTS - Narrative (Details) - USD ($) shares in Millions, $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 13, 2019 | Jun. 29, 2019 | Jun. 30, 2018 | Jun. 29, 2019 | Jun. 30, 2018 | Apr. 29, 2019
Citoxlab |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Ownership percentage |  |  |  |  |  | 90.00%
Noncontrolling interest ownership percentage |  |  |  |  |  | 10.00%
Vital River |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Additional equity interest percentage purchased | (5.00%) |  |  |  |  |
Ownership percentage | 92.00% |  |  |  |  |
Noncontrolling interest ownership percentage | 8.00% |  |  |  |  |
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) |  | 0.4 | 0.5 | 0.4 | 0.5 |
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) |  |  |  | 1.0 | 1.1 |
Citoxlab |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Contractually defined redemption value |  | $ 4.0 |  | $ 4.0 |  |
Vital River |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Purchase of additional equity interest | $ 7.9 |  |  |  |  |
Gain in equity equal to the excess fair value of additional equity interest purchase | 0.8 |  |  |  |  |
Contractually defined redemption value |  | $ 13.9 |  | $ 13.9 |  |
Vital River | Selling, general and administrative |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Charges equal to the excess fair value of hybrid equity instrument | $ 2.2 |  |  |  |  |

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