Other Financial Data (Accrued Expenses) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Customer advances (contract liabilities)	$ 879	$ 730
Current lease liabilities (accrued expenses)[Extensible Enumeration]	Accrued expenses	Accrued expenses
Operating lease liabilities (current)	$ 144	$ 155
Other Current Liabilities [Member]
Customer advances (contract liabilities)	853	730
Employee compensation	597	690
Product warranty	$ 122	$ 146