v3.25.2
Derivative Instruments and Hedging Activities - Location and Fair Values of Derivative Instruments and Hedging Activities (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Sep. 30, 2024
Derivative [Line Items]    
Total assets $ 16 $ 22
Total liabilities 3,630 3,450
Derivatives and Hedging Activities  Designated as Hedging Instruments    
Derivative [Line Items]    
Total assets 16 21
Total liabilities 3,619 3,449
Derivatives and Hedging Activities Not Designated as Hedging Instruments    
Derivative [Line Items]    
Total assets 0 1
Total liabilities 11 1
Other current assets | Foreign currency exchange derivatives | Derivatives and Hedging Activities  Designated as Hedging Instruments    
Derivative [Line Items]    
Total assets 13 19
Other current assets | Foreign currency exchange derivatives | Derivatives and Hedging Activities Not Designated as Hedging Instruments    
Derivative [Line Items]    
Total assets 0 1
Other current assets | Commodity derivatives | Derivatives and Hedging Activities  Designated as Hedging Instruments    
Derivative [Line Items]    
Total assets 3 2
Other current assets | Commodity derivatives | Derivatives and Hedging Activities Not Designated as Hedging Instruments    
Derivative [Line Items]    
Total assets 0 0
Other current liabilities | Foreign currency exchange derivatives | Derivatives and Hedging Activities  Designated as Hedging Instruments    
Derivative [Line Items]    
Total liabilities 7 24
Other current liabilities | Foreign currency exchange derivatives | Derivatives and Hedging Activities Not Designated as Hedging Instruments    
Derivative [Line Items]    
Total liabilities 11 1
Other current liabilities | Commodity derivatives | Derivatives and Hedging Activities  Designated as Hedging Instruments    
Derivative [Line Items]    
Total liabilities 1 1
Other current liabilities | Commodity derivatives | Derivatives and Hedging Activities Not Designated as Hedging Instruments    
Derivative [Line Items]    
Total liabilities 0 0
Long-term debt | Foreign currency denominated debt | Derivatives and Hedging Activities  Designated as Hedging Instruments    
Derivative [Line Items]    
Total liabilities 3,611 3,424
Long-term debt | Foreign currency denominated debt | Derivatives and Hedging Activities Not Designated as Hedging Instruments    
Derivative [Line Items]    
Total liabilities $ 0 $ 0