v3.25.2
Debt and Other Obligations Credit Facility Agreements (Details)
9 Months Ended
Jun. 30, 2025
USD ($)
Credit_facilities
Sep. 30, 2024
USD ($)
Line of Credit Facility [Line Items]    
Summary of Long-Term Credit Facilities
Summary of Credit Facilities
At June 30, 2025
(in millions)
Maturity DateFacility LimitLetters of Credit OutstandingCash BorrowingsAvailability
March 2026$150 $38 $— $112 
September 20261,000 71 — 929 
March 20271,000 194 — 806 
February 2028500 214 — 286 
Total$2,650 $517 $— $2,133 
 
Borrowings under U.S. Treasury credit facility $ 0  
Amount of letters of credit outstanding for credit facilities 6,000,000  
Line of Credit    
Line of Credit Facility [Line Items]    
Current borrowing capacity for credit facilities 150,000,000  
Revolving Credit Facilities    
Line of Credit Facility [Line Items]    
Current borrowing capacity for credit facilities $ 2,650,000,000  
Number of revolving credit facilities | Credit_facilities 4  
December 2019 Credit Facility $ 150,000,000  
February 2022 Credit Facility 1,000,000,000  
June 2020 Credit Facility 500,000,000  
September 2020 Credit Facility 1,000,000,000  
Cash Borrowings-December 2019 Credit Facility 0  
Cash Borrowings-June 2020 Credit Facility 0  
Cash Borrowings-September 2020 Credit Facility 0  
Total Cash Borrowings for Credit Facilities 0  
Remaining Availability, December 2019 Credit Facility 112,000,000  
Remaining Availability, February 2022 Credit Facility 806,000,000  
Long-term Line of Credit, Borrowings 3 0  
Remaining Availability, June 2020 Credit Facility 286,000,000  
Remaining Availability, September 2020 Credit Facility 929,000,000  
Total Remaining Availability for Credit Facilities 2,133,000,000  
Letter of Credit    
Line of Credit Facility [Line Items]    
Letters of Credit Outstanding, Amount 1 214,000,000  
Letter of Credit Outstanding, December 2019 Credit Facility 38,000,000  
Letter of Credit Outstanding, February 2022 Credit Facility 194,000,000  
Letter of Credit Outstanding, September 2020 Credit Facility 71,000,000  
Amount of letters of credit outstanding for credit facilities $ 517,000,000 $ 566,000,000