Income Taxes - Schedule of Domestic and Foreign Pretax (Loss) Income from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Domestic	$ 67	$ 218	$ 385
Foreign	534	391	355
Income before income taxes	$ 601	$ 609	$ 740