Debt and Financing Arrangements - Schedule of Net Financing Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Disclosure [Abstract]
Interest expense, net of capitalized interest costs	$ 36	$ 46	$ 121	$ 162
Banking fees and debt issuance cost amortization	6	14	20	27
Interest income	(2)	(2)	(5)	(6)
Premium paid on repurchase of debt	0	4	34	49
Derivative loss on Yanfeng transaction	0	24	3	24
Net foreign exchange	(1)	1	(1)	0
Net financing charges	$ 39	$ 87	$ 172	$ 256