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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2021
Equity [Abstract] |
Schedule of Components of Accumulated Other Comprehensive Loss | The following table presents the changes in the components of accumulated other comprehensive loss, net of tax:
($ in millions) | (Losses) gains on derivatives |  | Change in equity affiliate investment AOCI |  | Defined benefit pension and other postretirement plans |  | Foreign currency translation |  | Total
Balance, December 31, 2018 | $ | (0.4) |  |  | $ | 0.4 |  |  | $ | (40.4) |  |  | $ | (113.8) |  |  | (154.2) |
Other comprehensive income (loss) before reclassifications | 5.4 |  |  | — |  |  | (1.9) |  |  | 4.9 |  |  | 8.4 |
Amounts reclassified out | (5.8) |  |  | — |  |  | 2.0 |  |  | — |  |  | (3.8) |
Other comprehensive (loss) income, net of tax | (0.4) |  |  | — |  |  | 0.1 |  |  | 4.9 |  |  | 4.6 |
Balance, December 31, 2019 | (0.8) |  |  | 0.4 |  |  | (40.3) |  |  | (108.9) |  |  | (149.6) |
Other comprehensive income (loss) before reclassifications | 2.8 |  |  | 0.2 |  |  | (2.5) |  |  | 40.1 |  |  | 40.6 |
Amounts reclassified out | (3.9) |  |  | — |  |  | 2.3 |  |  | — |  |  | (1.6) |
Other comprehensive (loss) income, net of tax | (1.1) |  |  | 0.2 |  |  | (0.2) |  |  | 40.1 |  |  | 39.0 |
Balance, December 31, 2020 | (1.9) |  |  | 0.6 |  |  | (40.5) |  |  | (68.8) |  |  | (110.6) |
Other comprehensive income (loss) before reclassifications | (1.4) |  |  | 0.9 |  |  | 7.4 |  |  | (59.3) |  |  | (52.4) |
Amounts reclassified out | 2.1 |  |  | — |  |  | 1.3 |  |  | — |  |  | 3.4 |
Other comprehensive income (loss), net of tax | 0.7 |  |  | 0.9 |  |  | 8.7 |  |  | (59.3) |  |  | (49.0) |
Balance, December 31, 2021 | $ | (1.2) |  |  | $ | 1.5 |  |  | $ | (31.8) |  |  | $ | (128.1) |  |  | $ | (159.6) |
Schedule of Reclassification out of Accumulated Other Comprehensive Loss | A summary of the reclassifications out of accumulated other comprehensive loss is presented in the following table ($ in millions):
Detail of components |  | 2021 |  | 2020 |  | 2019 |  | Location on Statement of Income
Gains (losses) on derivatives: |  |  |  |  |  |  |  |
Foreign currency contracts |  | $ | (1.1) |  |  | $ | (0.2) |  |  | $ | 1.0 |  |  | Net sales
Foreign currency contracts |  | (2.4) |  |  | 0.1 |  |  | 1.0 |  |  | Cost of goods and services sold
Foreign currency contracts |  | 1.2 |  |  | 5.9 |  |  | 6.9 |  |  | Other expense (income)
Forward treasury locks |  | (0.4) |  |  | (0.4) |  |  | (0.5) |  |  | Interest expense
Total before tax |  | (2.7) |  |  | 5.4 |  |  | 8.4 |  |  |
Tax benefit (expense) |  | 0.6 |  |  | (1.5) |  |  | (2.6) |  |  |
Net of tax |  | $ | (2.1) |  |  | $ | 3.9 |  |  | $ | 5.8 |  |  |
Amortization of defined benefit pension and other postretirement plans: |  |  |  |  |  |  |  |
Prior service credit |  | $ | 0.3 |  |  | $ | 0.6 |  |  | $ | 0.6 |  |  | (a)
Actuarial (losses) gains |  | (0.2) |  |  | (0.1) |  |  | 0.2 |  |  | (a)
Settlements |  | (1.8) |  |  | (3.7) |  |  | (3.5) |  |  | (a)
Total before tax |  | (1.7) |  |  | (3.2) |  |  | (2.7) |  |  |
Tax benefit (expense) |  | 0.4 |  |  | 0.9 |  |  | 0.7 |  |  |
Net of tax |  | $ | (1.3) |  |  | $ | (2.3) |  |  | $ | (2.0) |  |  |
Total reclassifications for the period, net of tax |  | $ | (3.4) |  |  | $ | 1.6 |  |  | $ | 3.8 |  |  |
(a) These components are included in the computation of net periodic benefit cost. Please refer to Note 15, Benefit Plans, for additional details.

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