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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | $ 2,400.7 | $ 2,296.9
Other adjustments | (0.8) | 1.4
Balance at the end of the period | 2,373.8 | 2,270.3
Pensions |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | (20.3) | (25.8)
Amortization of net gain (loss) | 0.1 | 0.3
Balance at the end of the period | (20.2) | (25.5)
Post Retirement |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | 11.0 | 18.7
Amortization of prior service cost | (0.7) | (0.7)
Amortization of net gain (loss) | (0.2) | (0.4)
Balance at the end of the period | 10.1 | 17.6
Non-Qualified Plans |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | (0.2) | 0.1
Balance at the end of the period | (0.2) | 0.1
Other |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | 1.3 | 0.1
Foreign currency exchange | (0.9) | (0.3)
Other adjustments | 0.1 | 1.7
Balance at the end of the period | 0.5 | 1.5
Accumulated Other Comprehensive Income (Loss) |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | (8.2) | (6.9)
Amortization of prior service cost | (0.7) | (0.7)
Amortization of net gain (loss) | (0.1) | (0.1)
Foreign currency exchange | (0.9) | (0.3)
Other adjustments | 0.1 | 1.7
Balance at the end of the period | $ (9.8) | $ (6.3)

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