Borrowings Interest Income/(Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 29, 2014	Mar. 30, 2013
Interest expense	$ (67)	$ (83)	$ (148)	$ (175)
Interest and investment income	129	29	259	49
Interest income/(expense), net	$ 62	$ (54)	$ 111	$ (126)