Equity Changes in Accumulated Other Comprehensive Loss, Net of Tax (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Jun. 29, 2013		Jun. 30, 2012		Jun. 29, 2013		Jun. 30, 2012
Changes in Accumulated Other Comprehensive Loss, Net of Tax [Abstract]
Estimated tax rate	37.00%		37.00%		37.00%		37.00%
Accumulated Other Comprehensive Income [Roll Forward]
Market Value Adjustments, Investments, Beginning Balance	$ 25		$ 20		$ 3		$ 6
Market Value Adjustments, Cash Flow Hedges, Beginning Balance	118		(12)		(52)		(54)
Unrecognized Pension and Post-retirement Medical Expense, Beginning Balance	(3,094)		(2,537)		(3,234)		(2,625)
Foreign Currency Translation and Other, Beginning Balance	(17)		48		17		43
AOCI, Beginning Balance	(2,968)		(2,481)		(3,266)		(2,630)
Unrealized gains (losses) arising during the period, Investments	43		(4)		72		16
Unrealized gain (losses) arising during the period, Cash Flow Hedges	60		91		245		130
Unrealized gains (losses) arising during the period, Pension and Post-retirement Medical Expense	0		2		(6)		(20)
Unrealized gains (losses) arising during the period, Foreign Currency Translation and Other	(69)		(87)		(109)		(116)
Unrealized gains (losses) arising during the period, AOCI	34		2		202		10
Reclassifications of net (gains) losses to net income, Investments	0		(1)		(7)		(7)
Reclassifications of net (gains) losses to net income, Cash Flow Hedges	(25)	[1]	(18)	[1]	(40)	[1]	(15)	[1]
Reclassifications of net (gains) losses to net income, Unrecognized Pension and Post-retirement Medical Expense	75		55		221		165
Reclassifications of net (gains) losses to net income, Foreign Currency Translation and Other	0		0		6		34
Reclassifications of net (gains) losses to net income, AOCI	50		36		180		177
Market Value Adjustments, Investments, Ending Balance	68		15		68		15
Market Value Adjustments, Cash Flow Hedges, Ending Balance	153		61		153		61
Unrecognized Pension and Post-retirement Medical Expense, Ending Balance	(3,019)		(2,480)		(3,019)		(2,480)
Foreign Currency Translation and Other, Ending Balance	(86)		(39)		(86)		(39)
AOCI, Ending Balance	$ (2,884)		$ (2,443)		$ (2,884)		$ (2,443)

[1] Reclassifications of gains on cash flow hedges are primarily recorded in revenue.