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EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Feb. 12, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Defined Contribution Plan, Cost |  | $ 18.8 |  | $ 15.9 | $ 58.4 | $ 58.8 |
Pension Cost (Reversal of Cost) |  | (2.2) |  | 0.0 | 3.3 | 0.0 |
Service cost |  | 0.4 |  | 1.2 | 1.4 | 3.6 |
Interest cost |  | 3.2 |  | 7.5 | 13.6 | 16.4 |
Expected return on plan assets |  | (3.2) |  | (7.4) | (13.3) | (16.4) |
Recognized actuarial gain |  | (0.2) |  | (0.3) | (0.4) | (0.9) |
Net periodic pension (benefit) cost |  | (2.0) |  | 1.0 | 4.6 | 2.7 |
Pension Cost (Reversal of Cost) |  | (2.2) |  | 0.0 | 3.3 | 0.0 |
Foreign Plan |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year |  | 7.0 |  |  | 7.0 |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  | 1.0 |  |  | 4.4 |  |
Pension Cost (Reversal of Cost) |  | 0.0 |  | 0.0 | 0.0 | 0.0 |
Service cost |  | 0.4 |  | 1.2 | 1.4 | 3.6 |
Interest cost |  | 3.2 |  | 2.9 | 12.5 | 8.6 |
Expected return on plan assets |  | (3.2) |  | (3.1) | (13.0) | (9.1) |
Recognized actuarial gain |  | (0.2) |  | (0.3) | (0.4) | (0.9) |
Net periodic pension (benefit) cost |  | 0.2 |  | 0.7 | 0.5 | 2.2 |
Pension Cost (Reversal of Cost) |  | 0.0 |  | 0.0 | 0.0 | 0.0 |
UNITED STATES |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement | $ 138.8 |  |  |  |  |  |
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan |  |  | $ 30.6 |  |  |  |
Excise and Sales Taxes |  | 4.8 |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Other Nonoperating Income (Expense) |  |  |  |
Pension Cost (Reversal of Cost) |  | (2.2) |  | 0.0 | 3.3 | 0.0 |
Service cost |  | 0.0 |  | 0.0 | 0.0 | 0.0 |
Interest cost |  | 0.0 |  | 4.6 | 1.1 | 7.8 |
Expected return on plan assets |  | 0.0 |  | (4.3) | (0.3) | (7.3) |
Recognized actuarial gain |  | 0.0 |  | 0.0 | 0.0 | 0.0 |
Net periodic pension (benefit) cost |  | (2.2) |  | 0.3 | 4.1 | 0.5 |
Pension Cost (Reversal of Cost) |  | (2.2) |  | 0.0 | 3.3 | 0.0 |
Pension Plan [Member] |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Other Nonoperating Gains (Losses) |  | (2.4) |  | $ (0.2) | 3.2 | $ (0.9) |
WESCODeferredCompensationPlanMember |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Deferred Compensation Liability, Classified, Noncurrent |  | $ 32.5 |  |  | $ 32.5 |  | $ 27.4

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