Cash, Cash Equivalents, Restricted Cash and Borrowings Interest Expense, net (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Interest expense	$ (465)	$ (361)
Interest and investment income	79	34
Net periodic pension and postretirement benefit costs other than service costs	86	16
Interest expense, net	$ (300)	$ (311)