Leases Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Operating Lease Expense	$ 185	$ 195
Variable lease expense	20	17
Cash paid for operating leases, operating cash flows	188	192
Operating lease right-of-use asset additions	$ 97	$ 194