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Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |
Balance at start of period | $ 810.1 | $ 864.8
Balance at end of period | 787.0 | 810.1
Derivative Financial Instruments |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |
Balance at start of period | 1.1 | 4.0
Other comprehensive income (loss) before reclassifications, net of tax | 0.2 | 7.0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | (2.0) | (9.9)
Balance at end of period | (0.7) | 1.1
Foreign Currency Adjustments |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |
Balance at start of period | (380.1) | (342.2)
Other comprehensive income (loss) before reclassifications, net of tax | 30.3 | (37.9)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 0.0 | 0.0
Balance at end of period | (349.8) | (380.1)
Unrecognized Pension and Other Post-retirement Benefit Costs |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |
Balance at start of period | (161.3) | (197.3)
Other comprehensive income (loss) before reclassifications, net of tax | (20.0) | 29.1
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 5.5 | 6.9
Balance at end of period | (175.8) | (161.3)
Accumulated Other Comprehensive Income (Loss) |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |
Balance at start of period | (540.3) | (535.5)
Other comprehensive income (loss) before reclassifications, net of tax | 10.5 | (1.8)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 3.5 | (3.0)
Balance at end of period | $ (526.3) | $ (540.3)

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