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RESTRUCTURING CHARGES (Details 2) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 99 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Accrued restructuring costs | $ 16.2 |  | $ 49.7 |  | $ 16.2 | $ 49.7 | $ 16.2 | $ 27.5 | $ 13.6
Restructuring charges | 6.8 | $ 8.3 | 19.2 | $ 60.9 | 15.1 | 80.1 | 208.3 |  |
Amounts utilized |  |  |  |  | (26.4) | (44.0) |  |  |
Employee severance and related benefit costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Accrued restructuring costs | 3.4 |  | 11.3 |  | 3.4 | 11.3 | 3.4 | 10.8 | 9.4
Restructuring charges | 0.0 | 0.0 | 3.3 | 0.0 |  |  | 17.9 |  |
Amounts utilized |  |  |  |  | (7.4) | (1.4) |  |  |
Lease and other contract termination costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Accrued restructuring costs | 12.8 |  | 38.4 |  | 12.8 | 38.4 | 12.8 | 16.7 | 4.2
Restructuring charges | 1.7 | 0.0 | 1.7 | 39.7 |  |  | 37.2 |  |
Amounts utilized |  |  |  |  | (5.6) | (7.2) |  |  |
Facility exit costs |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Accrued restructuring costs | 0.0 |  | 0.0 |  | 0.0 | 0.0 | 0.0 | 0.0 | 0.0
Restructuring charges | 5.1 | 8.3 | 9.3 | 8.4 |  |  | 73.3 |  |
Amounts utilized |  |  |  |  | (13.4) | (17.7) |  |  |
Write-off of equipment and facility |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Accrued restructuring costs | 0.0 |  | 0.0 |  | 0.0 | 0.0 | 0.0 | $ 0.0 | $ 0.0
Restructuring charges | $ 0.0 | $ 0.0 | $ 4.9 | $ 12.8 |  |  | $ 79.9 |  |
Amounts utilized |  |  |  |  | $ 0.0 | $ (17.7) |  |  |

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