v3.25.1
Short-Term and Long-Term Debt
 6 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Short-Term and Long-Term Debt Short-Term and Long-Term Debt
Our Short-term debt as of March 31, 2025, included commercial paper borrowings of $996 million, with a weighted average interest rate of 4.57 percent, and a weighted average maturity period of 31 days. Our Short-term debt as of September 30, 2024, included commercial paper borrowings of $657 million, with a weighted average interest rate of 5.14 percent, and a weighted average maturity period of 24 days. In December 2022, Sensia entered into an unsecured $75 million line of credit. As of March 31, 2025, and September 30, 2024, included in Short-term debt was $70 million borrowed against the line of credit with an interest rate of 5.32 percent and 6.17 percent, respectively. Also included in Short-term debt as of March 31, 2025, and September 30, 2024, was $42 million of interest-bearing loans from Schlumberger (SLB) to Sensia. In April 2025, the loans were extended to October 15, 2026, and $14 million of new interest-bearing loans from SLB to Sensia were entered into and are due July 2025.
The following table presents the carrying amounts and estimated fair values of Long-term debt in the Consolidated Balance Sheet (in millions):
 March 31, 2025September 30, 2024
 Carrying ValueFair ValueCarrying ValueFair Value
Current portion of long-term debt$4 $4 $307 $305 
Long-term debt2,568 2,262 2,561 2,334 
We base the fair value of Long-term debt upon quoted market prices for the same or similar issues and therefore consider this a level 2 fair value measurement. The fair value of Long-term debt considers the terms of the debt excluding the impact of derivative and hedging activity. Refer to Note 9 for further information regarding levels in the fair value hierarchy. The carrying value of our Short-term debt approximates fair value.