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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023
Income Tax Disclosure [Abstract] |  |  |  |
Income tax expense | $ 3.8 | $ 5.4 | $ 24.8 | $ 5.9
Income tax benefit as a percent of pre-tax income (loss) | 37.60% | 22.50% | 21.10% | 24.70%
Goodwill impairment | $ 14.1 | $ 0.0 | $ 14.1 | $ 0.0
Pension settlement charges benefit | 12.4 |  | 12.4 |
Prior year income taxes (benefit) charge | $ (1.4) | 0.2 | $ (1.4) | 0.5
Tax rate excluding discrete items | 23.10% |  | 21.00% |
Discrete tax benefits attributable to anticipated interest |  | $ 0.2 |  | 0.8
Tax benefit attributable to employee share-based compensation |  |  | $ 4.7 |
Discrete tax charges associated with legislative changes |  |  |  | $ 0.6

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