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Restructuring and Impairment Costs - Narrative (Details) employee in Thousands, $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2023 USD ($) employee plant | Dec. 31, 2022 USD ($)
Restructuring Cost and Reserve [Line Items] |  |
Number of positions eliminated to date | employee | 13 |
Number of positions eliminated | employee | 11 |
Number of plants expected to close | plant | 26 |
Number of plants closed | plant | 22 |
2023 Restructuring Plan |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges |  | $ 7
2024 Restructuring Plan |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring costs | $ 11 |
Restructuring charges | $ 11 |

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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482017/420-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482017/420-10-50-1 + Details
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