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Income Taxes - Schedule of Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Sep. 30, 2024
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Deferred tax assets: |  |
Share-based compensation | $ 21.0 | $ 12.2
Deferred compensation | 0.0 | 5.4
Net operating loss carryforwards | 31.5 | 19.6
Capitalized interest | 5.0 | 0.0
Bad debt reserve | 7.7 | 7.2
Foreign tax credit carryforwards | 0.4 | 1.2
Other compensation | 9.8 | 7.5
Pension | 2.9 | 2.5
Right of use assets | 30.2 | 30.1
Property and equipment | 2.1 | 3.4
Other | 2.4 | 2.9
Total gross deferred tax assets | 113.0 | 92.0
Less valuation allowance | (18.5) | (15.5)
Deferred tax assets | 94.5 | 76.5
Deferred income tax liabilities: |  |
Unrealized gain on securities | 4.1 | 3.1
Prepaid expenses | 2.7 | 2.5
Intangibles | 105.2 | 0.0
Right of use liabilities | 25.2 | 26.7
Mark to market on inventory | 7.6 | 3.8
Other deferred liabilities | 3.3 | 0.5
Deferred compensation | 9.3 | 0.0
Hedging | 2.0 | 2.2
Deferred income tax liabilities | 159.4 | 38.8
Deferred income taxes, net | $ (64.9) |
Deferred income taxes, net |  | $ 37.7

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