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LEASES, Lease Cost (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Leases [Abstract]        
Lease costs $ 41 $ 37 $ 117 $ 110
Variable lease costs $ 10 $ 7 $ 25 $ 20