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Leases (Tables)
 6 Months Ended
Mar. 31, 2021
Leases [Abstract]  
Components of Lease Expense
The components of lease expense were as follows:
Three Months Ended March 31,Six Months Ended March 31,
2021202020212020
(in millions)
Lease Cost
Operating lease cost$14 12 $28 $26 
Short-term lease cost— — 1 — 
Variable lease cost3 2 5 5 
Sublease income— — — — 
Total lease cost$17 $14 $34 $31 
Supplemental Cash Flow Information
Supplemental cash flow information related to leases was as follows:
Six Months Ended March 31,
20212020
(in millions)
Cash paid for amounts included in the measurement of operating lease liabilities$29 $28 
Right-of-use assets obtained in exchange for operating lease obligations8 9 
Supplemental Balance Sheet Information
Supplemental balance sheet information related to leases was as follows:
March 31,
2021		September 30,
2020
(in millions)
Operating Leases
Operating lease right-of-use assets$267 $273 
Operating lease liabilities, current$42 $39 
Operating lease liabilities, noncurrent288 299 
Total operating lease liabilities$330 $338 
Weighted Average Remaining Lease Term
Operating leases8 years8 years
Weighted Average Discount Rate
Operating leases4.59 %4.58 %
Maturities of Lease Liabilities
Maturities of lease liabilities were as follows:
YearsOperating
Leases
(in millions)
2021$29 
202256 
202352 
202449 
202548 
Thereafter161 
Total lease payments395 
Less: Imputed interest(65)
Total$330