v3.26.3
Long-term and Short-term Debt - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Nov. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2022
Debt Instrument [Line Items]          
Short-term debt   $ 709 $ 608    
Interest payments   132 157 $ 153  
Notes Payable, Other Payables | $250.0 Million Dollar Note Due 2028          
Debt Instrument [Line Items]          
Total debt   250      
Notes Payable, Other Payables | $425.0 Million Dollar Note Due 2029          
Debt Instrument [Line Items]          
Total debt   425      
Notes Payable, Other Payables | $450.0 Million Dollar Note Due 2031          
Debt Instrument [Line Items]          
Total debt   $ 450      
Notes Payable, Other Payables | Unsecured Revolving Credit Facility Expiring in 2027          
Debt Instrument [Line Items]          
Borrowing capacity $ 1,500        
Line of Credit | Revolving Credit Facility          
Debt Instrument [Line Items]          
EBITDA to interest ratio   3.0      
Line of Credit | Revolving Credit Facility | Unsecured Revolving Credit Facility Expiring in 2030          
Debt Instrument [Line Items]          
Debt instrument, term 5 years        
Borrowing capacity $ 1,500        
Line of credit facility, accordion feature, increase limit $ 750        
Interest Bearing Loan Schlumberger (SLB) to Sensia          
Debt Instrument [Line Items]          
Short-term debt     42    
Commercial Paper          
Debt Instrument [Line Items]          
Short-term debt   $ 707 $ 522    
Debt, weighted average interest rate (in percent)   4.06% 4.24%    
Debt instrument, term   19 days 16 days    
Line of Credit          
Debt Instrument [Line Items]          
Short-term debt     $ 70    
Borrowing capacity         $ 75
Stated interest rate (in percent)     5.18%    
Interest Bearing Loan Schlumberger (SLB) to Sensia          
Debt Instrument [Line Items]          
Short-term debt     $ 14    
Foreign Line of Credit          
Debt Instrument [Line Items]          
Borrowing capacity   $ 274      
Letter of Credit          
Debt Instrument [Line Items]          
Borrowing capacity   $ 33