Discontinued Operations - Net Cash from Operating and Investing Activities (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash from operating activities	$ (29)	$ 116
Cash from investing activities	1	2,953
Climate Technologies
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash from operating activities	(29)	205
Cash from investing activities	1	(43)
ISE
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash from operating activities	0	(89)
Cash from investing activities	$ 0	$ 2,996