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Long-term and Short-term Debt (Tables) | 12 Months Ended
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Sep. 30, 2025
Debt Disclosure [Abstract] |
Schedule of Debt | Long-term debt consists of (in millions):
|  | September 30,
|  | 2025 |  | 2024
2.875% notes, payable in March 2025 |  | $ | — |  |  | $ | 302 |
6.70% debentures, payable in January 2028 |  | 250 |  |  | 250 |
3.50% notes, payable in March 2029 |  | 425 |  |  | 425 |
1.75% notes, payable in August 2031 |  | 450 |  |  | 450 |
6.25% debentures, payable in December 2037 |  | 250 |  |  | 250 |
4.20% notes, payable in March 2049 |  | 575 |  |  | 575 |
2.80% notes, payable in August 2061 |  | 450 |  |  | 450 |
5.20% debentures, payable in January 2098 |  | 200 |  |  | 200 |
Sensia loans from SLB, payable in October 2026 |  | 42 |  |  | — |
Unamortized discount, capitalized lease obligations and other |  | (26) |  |  | (34) |
Total debt |  | 2,616 |  |  | 2,868 |
Less: Current portion |  | (2) |  |  | (307) |
Long-term debt |  | $ | 2,614 |  |  | $ | 2,561 |
Schedule of Fair Value of Long-term Debt | The following table presents the carrying amounts and estimated fair values of Long-term debt in the Consolidated Balance Sheet (in millions):
|  | September 30, 2025 |  | September 30, 2024
|  | Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value
Current portion of long-term debt |  | $ | 2 |  |  | $ | 2 |  |  | $ | 307 |  |  | $ | 305 |
Long-term debt |  | 2,614 |  |  | 2,350 |  |  | 2,561 |  |  | 2,334 |

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