Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 01, 2023	Apr. 02, 2022	Apr. 01, 2023	Apr. 02, 2022
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	$ (84)	$ (16)	$ (170)	$ (32)
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service costs	63	102	128	202
Interest costs	195	126	391	250
Expected return on plan assets	(287)	(294)	(575)	(587)
Amortization of previously deferred service costs	3	1	5	2
Recognized net actuarial loss	4	145	9	292
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	(85)	(22)	(170)	(43)
Net periodic benefit cost (income)	(22)	80	(42)	159
Postretirement Medical Plans
Defined Benefit Plan Disclosure [Line Items]
Service costs	2	3	3	5
Interest costs	21	13	41	26
Expected return on plan assets	(15)	(14)	(30)	(29)
Amortization of previously deferred service costs	0	0	0	0
Recognized net actuarial loss	(5)	7	(11)	14
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	1	6	0	11
Net periodic benefit cost (income)	$ 3	$ 9	$ 3	$ 16