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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS - Net Periodic Benefit Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Net periodic benefit cost |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense)
U.S. Plans And Non-U.S. Plans |  |  |  |
Net periodic benefit cost |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) |  |
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) |  |
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) |  |
Defined Benefit Pension Plans | Non-U.S. Plans |  |  |  |
Net periodic benefit cost |  |  |  |
Service cost | $ 1.9 | $ 2.0 | $ 4.0 | $ 4.1
Interest cost | 2.4 | 1.7 | 4.8 | 3.4
Expected return on plan assets | (0.9) | (0.2) | (1.9) | (0.3)
Amortization of prior service credit | (0.1) | (0.1) | (0.2) | (0.1)
Amortization of net (gain) loss | (0.3) | (0.8) | (0.6) | (1.5)
Net periodic benefit cost | 3.0 | 2.6 | 6.1 | 5.6
Defined Benefit Pension Plans | U.S. Plans |  |  |  |
Net periodic benefit cost |  |  |  |
Service cost | 0.1 | 0.1 | 0.2 | 0.3
Interest cost | 0.2 | 0.2 | 0.4 | 0.4
Expected return on plan assets | (0.2) | (0.1) | (0.4) | (0.3)
Net periodic benefit cost | 0.1 | 0.2 | 0.2 | 0.4
Other Postretirement Benefit Plans | Maximum |  |  |  |
Net periodic benefit cost |  |  |  |
Net periodic benefit cost | $ 0.2 | $ 0.2 | $ 0.2 | $ 0.2

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