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Business Restructuring Charges (Tables) | 9 Months Ended
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Jun. 30, 2025
Restructuring and Related Activities [Abstract] |
Schedule of Restructuring and Related Costs | The following table summarizes the charges related to the restructuring programs by type of cost for the periods ended:
| Three months ended June 30, 2025 |  | Nine months ended June 30, 2025 |  |  |  |
| Employee Termination |  | Non-Employee Related |  | Total |  | Employee Termination |  | Non-Employee Related |  | Total |  |  |  |
Cost of products sold | $ | 0.1 |  |  | $ | 0.2 |  |  | $ | 0.3 |  |  | $ | 0.4 |  |  | $ | 6.3 |  |  | $ | 6.7 |  |  |  |  |
Selling and administrative expense | — |  |  | — |  |  | — |  |  | 0.6 |  |  | — |  |  | 0.6 |  |  |  |  |
Research and development expense | 0.2 |  |  | 0.4 |  |  | 0.6 |  |  | 6.8 |  |  | 4.7 |  |  | 11.5 |  |  |  |  |
Other operating expenses | (0.2) |  |  | 0.3 |  |  | 0.1 |  |  | 14.0 |  |  | 5.0 |  |  | 19.0 |  |  |  |  |
| $ | 0.1 |  |  | $ | 0.9 |  |  | $ | 1.0 |  |  | $ | 21.8 |  |  | $ | 16.0 |  |  | $ | 37.8 |  |  |  |  |
Schedule of Restructuring Liability Activity | The following table summarizes the charges and spending relating to restructuring program activities for the nine months ended June 30, 2025:
| Employee Termination |  | Non-Employee Related |  | Total |  |  |  |
Balance at September 30, 2024 | $ | — |  |  | $ | — |  |  | $ | — |  |  |  |  |
Charged to expense | 21.8 |  |  | 16.0 |  |  | 37.8 |  |  |  |  |
Cash payments | (17.5) |  |  | (4.0) |  |  | (21.5) |  |  |  |  |
Non-cash adjustments | (3.1) |  |  | (10.6) |  |  | (13.7) |  |  |  |  |
Balance at June 30, 2025 (a) | $ | 1.2 |  |  | $ | 1.4 |  |  | $ | 2.6 |  |  |  |  |
(a) As of June 30, 2025, $1.2 million is recorded in Salaries, wages and related items and $1.4 million is recorded in Accrued expenses.

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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