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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | $ 1,667.4 | $ 961.2
Amortization of prior service cost | (0.9) | (1.1)
Amortization of net loss | 0.8 | 1.2
Other adjustments | 0.3 | (0.2)
Balance at the end of the period | 1,910.7 | 1,028.9
Pensions |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | (39.1) | (61.7)
Amortization of prior service cost | (0.2) | (0.4)
Amortization of net loss | 0.6 | 0.9
Balance at the end of the period | (38.7) | (61.2)
Post Retirement |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | 10.1 | 12.2
Amortization of prior service cost | (0.7) | (0.7)
Amortization of net loss | 0.2 | 0.2
Balance at the end of the period | 9.6 | 11.7
Non-Qualified Plans |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | (0.7) | (0.6)
Amortization of net loss |  | 0.1
Balance at the end of the period | (0.7) | (0.5)
Other |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | (1.2) | (0.7)
Foreign currency exchange | 0.3 | (0.2)
Balance at the end of the period | (0.9) | (0.9)
Accumulated Other Comprehensive Income (Loss) |  |
Changes in accumulated other comprehensive income (loss) by component, net of taxes |  |
Balance at the beginning of the period | (30.9) | (50.8)
Amortization of prior service cost | (0.9) | (1.1)
Amortization of net loss | 0.8 | 1.2
Foreign currency exchange | 0.3 | (0.2)
Balance at the end of the period | $ (30.7) | $ (50.9)

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