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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component | Changes in accumulated other comprehensive income (loss) by component were as follows (in millions):
|  | Three Months Ended March 31, 2024 |
|  | Employee Pension and Postretirement Benefits, Net of Tax |  |  | Cumulative Translation Adjustments |  |  | Derivative Instruments, Net of Tax |  |  | Accumulated Other Comprehensive Income (Loss) |
Balance at beginning of period |  | $ | 33.0 |  |  | $ | (104.5 | ) |  | $ | (0.5 | ) |  | $ | (72.0 | )
Other comprehensive income (loss) before reclassifications |  |  | — |  |  |  | (17.5 | ) |  |  | 0.5 |  |  |  | (17.0 | )
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | (0.4 | ) |  |  | — |  |  |  | (0.2 | ) |  |  | (0.6 | )
Net current period other comprehensive income (loss) |  |  | (0.4 | ) |  |  | (17.5 | ) |  |  | 0.3 |  |  |  | (17.6 | )
Balance at end of period |  | $ | 32.6 |  |  | $ | (122.0 | ) |  | $ | (0.2 | ) |  | $ | (89.6 | )
|  | Three Months Ended March 31, 2023 |
|  | Employee Pension and Postretirement Benefits, Net of Tax |  |  | Cumulative Translation Adjustments |  |  | Derivative Instruments, Net of Tax |  |  | Accumulated Other Comprehensive Income (Loss) |
Balance at beginning of period |  | $ | 31.1 |  |  | $ | (131.6 | ) |  | $ | 8.2 |  |  | $ | (92.3 | )
Other comprehensive income (loss) before reclassifications |  |  | — |  |  |  | 10.4 |  |  |  | 0.2 |  |  |  | 10.6 |
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | (0.4 | ) |  |  | 1.0 |  |  |  | (2.2 | ) |  |  | (1.6 | )
Net current period other comprehensive income (loss) |  |  | (0.4 | ) |  |  | 11.4 |  |  |  | (2.0 | ) |  |  | 9.0 |
Balance at end of period |  | $ | 30.7 |  |  | $ | (120.2 | ) |  | $ | 6.2 |  |  | $ | (83.3 | )
Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Included in the Computation of Net Periodic Pension and Postretirement Benefit Cost | Reclassifications out of accumulated other comprehensive income (loss) included in the computation of net periodic pension and postretirement benefit cost (See Note 6 for additional details regarding employee benefit plans) were as follows (in millions):
|  | Classification of Income (Expense) |  | Three Months Ended March 31, |
|  |  |  | 2024 |  |  | 2023 |
Amortization of employee pension and postretirement benefits items |  |  |  |  |  |  |  |
Prior service cost |  | Miscellaneous, net |  | $ | 0.1 |  |  | $ | 0.1 |
Actuarial gains |  | Miscellaneous, net |  |  | (0.6 | ) |  |  | (0.6 | )
Total before tax |  |  |  |  | (0.5 | ) |  |  | (0.5 | )
Tax expense |  |  |  |  | 0.1 |  |  |  | 0.1 |
Net of tax |  |  |  | $ | (0.4 | ) |  | $ | (0.4 | )

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