Accounts Receivable (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2022
Receivables [Abstract]
Accounts receivable, sale	$ 427	$ 234	$ 836	$ 368
Outstanding receivables sold under factoring agreements	$ 402		$ 402		$ 476