Equity Details about AOCI Components Reclassified to Net Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Details about AOCI Components Reclassified to Net Income
Interest income/(expense), net	$ (50)	$ (83)	$ 61	$ (209)
Primarily revenue	12,466	11,578	36,424	33,473
Other income/(expense), net	0	0	(31)	(92)
Income taxes	1,251	1,059	3,406	2,303
Net income	2,245	1,847	6,002	4,742
Reclassification out of Accumulated Other Comprehensive Income [Member]
Details about AOCI Components Reclassified to Net Income
Net income	(13)	(50)	64	(180)
Gain/(loss) in net income from Investments, net | Reclassification out of Accumulated Other Comprehensive Income [Member]
Details about AOCI Components Reclassified to Net Income
Interest income/(expense), net	2	0	153	11
Income taxes	(1)	0	(57)	(4)
Net income	1	0	96	7
Gain/(loss) in net income from Cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income [Member]
Details about AOCI Components Reclassified to Net Income
Primarily revenue	16	40	65	64
Income taxes	(6)	(15)	(24)	(24)
Net income	10	25	41	40
Gain/(loss) in net income from Pension and postretirement medical expense | Reclassification out of Accumulated Other Comprehensive Income [Member]
Details about AOCI Components Reclassified to Net Income
Primarily included in the computation of net periodic benefit cost	(38)	(119)	(116)	(350)
Income taxes	14	44	43	129
Net income	(24)	(75)	(73)	(221)
Gain/(loss) in net income from Foreign currency translation and other | Reclassification out of Accumulated Other Comprehensive Income [Member]
Details about AOCI Components Reclassified to Net Income
Other income/(expense), net	0	0	0	(10)
Income taxes	0	0	0	4
Net income	$ 0	$ 0	$ 0	$ (6)