Income Taxes - Schedule of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
Deferred tax assets:
Net operating losses, capital losses and tax credits	$ 253	$ 209
Accrued liabilities	163	213
Postretirement and postemployment benefits	17	21
Employee compensation and benefits	103	122
Other	158	125
Total	694	690
Valuation allowances	(164)	(171)
Deferred tax liabilities:
Intangibles	(1,387)	(1,622)
Pensions	(151)	(126)
Property, plant and equipment	(148)	(207)
Undistributed non-U.S. earnings	(32)	(37)
Deferred gains	(596)	(10)
Other	(75)	(146)
Total	(2,389)	(2,148)
Net deferred income tax liability	$ (1,859)	$ (1,629)