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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Jun. 30, 2021	Sep. 30, 2020
Operating Leases
Operating lease right-of-use assets	$ 273	$ 273
Operating lease liabilities, current	43	39
Operating lease liabilities, noncurrent	293	299
Total operating lease liabilities	$ 336	$ 338
Weighted Average Remaining Lease Term
Operating leases	8 years	8 years
Weighted Average Discount Rate
Operating leases	4.67%	4.58%

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

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