Other Financial Data - Other Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
Other Liabilities [Line Items]
Operating lease liabilities (noncurrent)	$ 404	$ 312
Other	3,506	3,153
Other Liabilities
Other Liabilities [Line Items]
Deferred income taxes	1,959	1,714
Pension and postretirement liabilities	435	427
Asbestos litigation	173	205
Other	535	495
Total	$ 3,506	$ 3,153