Income Taxes - Components of Income from Continuing Operations Before Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Domestic, including Puerto Rico	$ 496	$ 70	$ (579)
Foreign	1,287	1,623	993
Income from Continuing Operations Before Income Taxes	$ 1,783	$ 1,692	$ 414