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Reclassifications from Accumulated Other Comprehensive Loss (Tables) | 3 Months Ended
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Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Changes in AOCI by Component, Net of Tax | The changes in AOCI by component, net of tax, for the three months ended September 30, 2025 and 2024 were as follows:
Three Months Ended September 30, 2025 ($ in millions) (a) |  | Cash flow hedging items |  | Pension and other postretirement benefit plan items |  |  |  | Foreign currency items |  | Total
Balances at June 30, 2025 |  | $ | (4.2) |  |  | $ | (27.4) |  |  |  |  | $ | (36.3) |  |  | $ | (67.9) |
Other comprehensive loss before reclassifications |  | (0.9) |  |  | — |  |  |  |  | (0.5) |  |  | (1.4) |
Amounts reclassified from AOCI (b) |  | 1.2 |  |  | 0.4 |  |  |  |  | — |  |  | 1.6 |
Total other comprehensive income (loss), net of tax |  | 0.3 |  |  | 0.4 |  |  |  |  | (0.5) |  |  | 0.2 |
Balances at September 30, 2025 |  | $ | (3.9) |  |  | $ | (27.0) |  |  |  |  | $ | (36.8) |  |  | $ | (67.7) |
Three Months Ended September 30, 2024 ($ in millions) (a) |  | Cash flow hedging items |  | Pension and other postretirement benefit plan items |  |  |  | Foreign currency items |  | Total
Balances at June 30, 2024 |  | $ | (5.9) |  |  | $ | (44.3) |  |  |  |  | $ | (43.7) |  |  | $ | (93.9) |
Other comprehensive (loss) income before reclassifications |  | (0.8) |  |  | — |  |  |  |  | 1.2 |  |  | 0.4 |
Amounts reclassified from AOCI (b) |  | 1.4 |  |  | 1.0 |  |  |  |  | — |  |  | 2.4 |
Total other comprehensive income, net of tax |  | 0.6 |  |  | 1.0 |  |  |  |  | 1.2 |  |  | 2.8 |
Balances at September 30, 2024 |  | $ | (5.3) |  |  | $ | (43.3) |  |  |  |  | $ | (42.5) |  |  | $ | (91.1) |
(a) All amounts are net of tax. Amounts in parentheses indicate debits. (b) See separate table below for further details.
Schedule of Amounts Reclassified from AOCI | The following is a summary of amounts reclassified from AOCI for the three months ended September 30, 2025 and 2024:
Details about AOCI Components |  | Location of loss |  | Amount Reclassified from AOCI Three Months Ended September 30, |  |
($ in millions) (a) |  |  | 2025 |  | 2024 |  |  |  |
Cash flow hedging items: |  |  |  |  |  |  |  |  |  |
Commodity contracts |  | Cost of sales |  | $ | (1.5) |  |  | $ | (1.8) |  |  |  |  |
Total before tax |  |  |  | (1.5) |  |  | (1.8) |  |  |  |  |
Tax benefit |  |  |  | 0.3 |  |  | 0.4 |  |  |  |  |
Net of tax |  |  |  | $ | (1.2) |  |  | $ | (1.4) |  |  |  |  |
Details about AOCI Components |  | Location of loss |  | Amount Reclassified from AOCI Three Months Ended September 30, |  |
($ in millions) (a) |  |  | 2025 |  | 2024 |  |  |  |
Amortization of pension and other postretirement benefit plan items: |  |  |  |  |  |  |  |  |  |
Net actuarial loss |  | (b) |  | $ | (0.1) |  |  | $ | (0.5) |  |  |  |  |
Prior service cost |  | (b) |  | (0.4) |  |  | (0.8) |  |  |  |  |
Total before tax |  |  |  | (0.5) |  |  | (1.3) |  |  |  |  |
Tax benefit |  |  |  | 0.1 |  |  | 0.3 |  |  |  |  |
Net of tax |  |  |  | $ | (0.4) |  |  | $ | (1.0) |  |  |  |  |
(a) Amounts in parentheses indicate debits to income/loss. (b) These AOCI components are included in the computation of net periodic pension expense (income) (see Note 8. Pension and Other Postretirement Benefits for additional details).

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