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Leases (Tables)
 12 Months Ended
Sep. 30, 2025
Leases [Abstract]  
Lease, Cost
The components of lease expense were (in millions):
202520242023
Operating lease expense (1)
$115 $110 $100 
Variable lease expense (2)
21 20 19 
Finance lease expense
Amortization of right-of-use assets6 8 5 
Interest on lease liabilities— — 1 
Total lease expense$142 $138 $125 
(1) Operating lease expense includes short-term lease expense, which was not material.
(2) Variable lease expense includes sublease income, which was not material.
Supplemental cash flow information related to leases consists of (in millions):
202520242023
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases$117 $110 $102 
Financing cash flows from finance leases6 10 6 
Right-of-use assets obtained in exchange for lease obligations
Operating leases$68 $163 $93 
Financing leases— 9 — 
Supplemental Balance Sheet Information
Supplemental balance sheet information related to leases consists of:
20252024
Weighted average remaining lease term
Operating leases6.0 years6.4 years
Finance leases3.5 years3.7 years
Weighted average discount rate
Operating leases3.81 %3.72 %
Finance leases3.73 %2.77 %
Operating Lease Maturity
Undiscounted maturities of lease liabilities as of September 30, 2025, were (in millions):
Finance LeasesOperating Leases
2026$2 $110 
20272 94 
20282 74 
2029— 53 
2030— 40 
Thereafter— 102 
Total undiscounted lease payments$6 $473 
Less: Imputed interest— (50)
Total lease liabilities$6 $423