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Acquisitions and Divestitures (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Business Combination [Line Items] |  |
Investments in joint ventures | $ 4 | $ 3
Setex, Inc. |  |
Business Combination [Line Items] |  |
Proceeds from sale of investments | 27 |
Gain on sale | 4 | $ 4
Technotrim, Inc. |  |
Business Combination [Line Items] |  |
Net purchase consideration | 28 |
SCI-ZJK |  |
Business Combination [Line Items] |  |
Investments in joint ventures | $ 4 |
Ownership percentage (in percentage) | 49.00% |

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