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Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Sep. 30, 2021
Equity [Abstract] |
Schedule of Components of Accumulated Other Comprehensive Loss | The following table presents the changes in the components of accumulated other comprehensive income ("AOCI") (loss), net of tax, for the nine months ended September 30, 2021:
($ 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, 2020 | $ | (1.9) |  |  | $ | 0.6 |  |  | $ | (40.5) |  |  | $ | (68.8) |  |  | $ | (110.6) |
Other comprehensive income (loss) before reclassifications | (2.5) |  |  | — |  |  | 0.6 |  |  | (46.9) |  |  | (48.8) |
Amounts reclassified out from accumulated other comprehensive income (loss) | 3.2 |  |  | — |  |  | 0.5 |  |  | — |  |  | 3.7 |
Other comprehensive income (loss), net of tax | 0.7 |  |  | — |  |  | 1.1 |  |  | (46.9) |  |  | (45.1) |
Balance, September 30, 2021 | $ | (1.2) |  |  | $ | 0.6 |  |  | $ | (39.4) |  |  | $ | (115.7) |  |  | $ | (155.7) |
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) |  | Three Months Ended September 30, |  | Nine Months Ended September 30, |  | Location on Statement of Income
Detail of components |  | 2021 |  | 2020 |  | 2021 |  | 2020 |
Gains (losses) on derivatives: |  |  |  |  |  |  |  |  |  |
Foreign currency contracts |  | $ | (0.1) |  |  | $ | (0.3) |  |  | $ | (1.1) |  |  | $ | 0.3 |  |  | Net sales
Foreign currency contracts |  | 0.4 |  |  | (0.1) |  |  | (1.9) |  |  | 0.3 |  |  | Cost of goods and services sold
Foreign currency contracts |  | (0.9) |  |  | 1.1 |  |  | (2.1) |  |  | 5.1 |  |  | Other expense (income)
Forward treasury locks |  | (0.1) |  |  | (0.1) |  |  | (0.3) |  |  | (0.3) |  |  | Interest expense
Total before tax |  | (0.7) |  |  | 0.6 |  |  | (5.4) |  |  | 5.4 |  |  |
Tax benefit (expense) |  | 0.7 |  |  | (0.3) |  |  | 2.2 |  |  | (1.9) |  |  |
Net of tax |  | $ | — |  |  | $ | 0.3 |  |  | $ | (3.2) |  |  | $ | 3.5 |  |  |
Amortization of defined benefit pension and other postretirement plans: |  |  |  |  |  |  |  |  |  |
Prior service credit |  | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.2 |  |  | $ | 0.4 |  |  | (a)
Actuarial losses |  | 0.1 |  |  | 0.2 |  |  | (0.1) |  |  | — |  |  | (a)
Settlements |  | — |  |  | (1.1) |  |  | (0.7) |  |  | (3.4) |  |  | (a)
Total before tax |  | 0.2 |  |  | (0.8) |  |  | (0.6) |  |  | (3.0) |  |  |
Tax benefit (expense) |  | (0.1) |  |  | 0.3 |  |  | 0.1 |  |  | 0.8 |  |  |
Net of tax |  | $ | 0.1 |  |  | $ | (0.5) |  |  | $ | (0.5) |  |  | $ | (2.2) |  |  |
Total reclassifications for the period, net of tax |  | $ | 0.1 |  |  | $ | (0.2) |  |  | $ | (3.7) |  |  | $ | 1.3 |  |  |
(a) These components are included in the computation of net periodic benefit cost. Please refer to Note 14, Benefit Plans, for additional details.

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