Divestitures - Details of (Loss) Income from Discontinued Operations, Net of Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from Discontinued Operations, Net of Tax	$ (46)	$ 144	$ 488
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue		538	1,117
Disposal Group, Including Discontinued Operation, Costs of Goods Sold		143	320
Disposal Group, Including Discontinued Operation, Selling, General and Administrative Expense		78	148
Disposal Group, Including Discontinued Operations, Research and Development Expense		32	59
Disposal Groups, Including Discontinued Operation, Acquisition Related Costs and Restructuring Charges		0	6
Disposal Group, Including Discontinued Operation, Other Operating Income (Expense), Net		95	35
Disposal Group, Including Discontinued Operation, Operating Expense		348	569
Disposal Group, Including Discontinued Operation, Operating Income (Loss)		190	549
Disposal Group, Including Discontinued Operation, Interest Expense		(4)	0
Disposal Group, Including Discontinued Operation, Other Nonoperating Income (Expense)		0	2
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		186	550
Discontinued Operation, Tax Effect of Discontinued Operation		42	62
(Loss) Income from Discontinued Operations, Net of Tax		$ 144	$ 488