Summary Of Significant Accounting Policies - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Land	$ 255	$ 200
Buildings	1,758	1,500
Machinery and equipment	3,228	3,300
Construction in progress	283	390
Property, plant and equipment, at cost	5,524	5,390
Less: Accumulated depreciation	3,161	3,151
Property, plant and equipment, net	$ 2,363	$ 2,239
Minimum | Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	30 years
Minimum | Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	8 years
Maximum | Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Maximum | Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	12 years