v3.26.3
REVENUE RECOGNITION (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2024
Disaggregation of Revenue [Line Items]      
Revenues $ 10,557 $ 8,831 $ 7,940
Contract with Customer, Asset, Net, Current 339 280  
Contract with Customer, Asset, Net, Noncurrent 128 94  
Contract with Customer, Asset, after Allowance for Credit Loss 467 374  
Contract liabilities, current (Note 3) 161 143  
Contract with Customer, Liability, Noncurrent 5 7  
Contract with Customer, Liability 166 150  
Net Contract Asset 301 224  
Contract With Customer Liability, Revenue Recognized, Excluding Opening Balance 115    
Geographic Distribution, Foreign      
Disaggregation of Revenue [Line Items]      
Revenues $ 3,698 $ 3,296 $ 2,908