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Commitment and Contingencies - Legacy Asbestos Liabilities and Insurance Recoveries Receivable (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Business Interruption Loss [Line Items] |  |
Net exposure | $ (151) | $ (18)
Other Receivables |  |
Business Interruption Loss [Line Items] |  |
Insurance settlements receivable | 22 | 9
Other Noncurrent Assets |  |
Business Interruption Loss [Line Items] |  |
Insurance settlements receivable | 268 | 93
Other current liabilities |  |
Business Interruption Loss [Line Items] |  |
Liability for asbestos and environmental claims, gross | (34) | (15)
Other Noncurrent Liabilities |  |
Business Interruption Loss [Line Items] |  |
Liability for asbestos and environmental claims, gross | $ (407) | $ (105)

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- Definition Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos and environmental claims, before estimated recoveries from reinsurers. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (cc) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 + Details
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