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SENIOR NOTES PAYABLE (Tables)
 12 Months Ended
Sep. 30, 2025
Debt Disclosure [Abstract]  
Schedule of Senior Notes Payable
The following table summarizes our senior notes payable.
September 30,
$ in millions20252024
4.65% senior notes, due 2030
$500 $500 
4.90% senior notes, due 2035
650 — 
4.95% senior notes, due 2046
800 800 
3.75% senior notes, due 2051
750 750 
5.65% senior notes, due 2055
850 — 
Total principal amount3,550 2,050 
Net unaccreted premiums/(discounts)
— 5 
Unamortized debt issuance costs
(30)(15)
Total senior notes payable$3,520 $2,040