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Comprehensive Income (Tables) | 9 Months Ended
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May 31, 2023
Equity [Abstract] |
Schedule of Changes in Each Component of Accumulated Other Comprehensive Loss | The following table presents the changes in each component of accumulated other comprehensive income (loss) net of tax during the periods presented (in millions):
| Foreign Currency Items |  | Defined Benefit Pension Plans |  | Accumulated Other Comprehensive Loss Items
Balance at August 31, 2022 | $ | (73.5) |  |  | $ | (52.3) |  |  | $ | (125.8) |
Other comprehensive income before reclassifications | 2.6 |  |  | — |  |  | 2.6 |
Amounts reclassified from accumulated other comprehensive income (1) | — |  |  | 3.2 |  |  | 3.2 |
Net current period other comprehensive income | 2.6 |  |  | 3.2 |  |  | 5.8 |
Balance at May 31, 2023 | $ | (70.9) |  |  | $ | (49.1) |  |  | $ | (120.0) |
| Foreign Currency Items |  | Defined Benefit Pension Plans |  | Accumulated Other Comprehensive Loss Items
Balance at August 31, 2021 | $ | (40.2) |  |  | $ | (58.0) |  |  | $ | (98.2) |
Other comprehensive loss before reclassifications | (8.9) |  |  | — |  |  | (8.9) |
Amounts reclassified from accumulated other comprehensive income (1) | — |  |  | 3.6 |  |  | 3.6 |
Net current period other comprehensive (loss) income | (8.9) |  |  | 3.6 |  |  | (5.3) |
Balance at May 31, 2022 | $ | (49.1) |  |  | $ | (54.4) |  |  | $ | (103.5) |
_______________________________________ (1) The before tax amounts of the defined benefit pension plan items are included in net periodic pension cost. See the Pension and Defined Contribution Plans footnote for additional details.
Schedule of Tax Expense or Benefit Allocated to Each Component of Other Comprehensive Income (Loss) | The following table summarizes the tax expense or benefit allocated to each component of other comprehensive income (loss) for the periods presented (in millions):
| Three Months Ended
| May 31, 2023 |  | May 31, 2022
| Before Tax Amount |  | Tax (Expense) Benefit |  | Net of Tax Amount |  | Before Tax Amount |  | Tax (Expense) Benefit |  | Net of Tax Amount
Foreign currency translation adjustments | $ | 5.2 |  |  | $ | — |  |  | $ | 5.2 |  |  | $ | (1.8) |  |  | $ | — |  |  | $ | (1.8) |
Defined benefit pension plans: |  |  |  |  |  |  |  |  |  |  |
Amortization of defined benefit pension items: |  |  |  |  |  |  |  |  |  |  |
Prior service cost | 0.7 |  |  | (0.2) |  |  | 0.5 |  |  | 0.7 |  |  | (0.1) |  |  | 0.6 |
Actuarial losses | 0.8 |  |  | (0.2) |  |  | 0.6 |  |  | 0.8 |  |  | (0.2) |  |  | 0.6 |
Total defined benefit pension plans, net | 1.5 |  |  | (0.4) |  |  | 1.1 |  |  | 1.5 |  |  | (0.3) |  |  | 1.2 |
Other comprehensive income (loss) | $ | 6.7 |  |  | $ | (0.4) |  |  | $ | 6.3 |  |  | $ | (0.3) |  |  | $ | (0.3) |  |  | $ | (0.6) |
| Nine Months Ended
| May 31, 2023 |  | May 31, 2022
| Before Tax Amount |  | Tax (Expense) Benefit |  | Net of Tax Amount |  | Before Tax Amount |  | Tax (Expense) Benefit |  | Net of Tax Amount
Foreign currency translation adjustments | $ | 2.6 |  |  | $ | — |  |  | $ | 2.6 |  |  | $ | (8.9) |  |  | $ | — |  |  | $ | (8.9) |
Defined benefit pension plans: |  |  |  |  |  |  |  |  |  |  |
Amortization of defined benefit pension items: |  |  |  |  |  |  |  |  |  |  |
Prior service cost | 2.0 |  |  | (0.5) |  |  | 1.5 |  |  | 2.1 |  |  | (0.5) |  |  | 1.6 |
Actuarial losses | 2.3 |  |  | (0.6) |  |  | 1.7 |  |  | 2.6 |  |  | (0.6) |  |  | 2.0 |
Total defined benefit pension plans, net | 4.3 |  |  | (1.1) |  |  | 3.2 |  |  | 4.7 |  |  | (1.1) |  |  | 3.6 |
Other comprehensive income (loss) | $ | 6.9 |  |  | $ | (1.1) |  |  | $ | 5.8 |  |  | $ | (4.2) |  |  | $ | (1.1) |  |  | $ | (5.3) |

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