Borrowings Borrowings - Additional Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 29, 2014	Mar. 29, 2014
Line of Credit Facility
Line of Credit Facility, Interest Rate Description		All of the above bank facilities allow for borrowings at LIBOR-based rates plus a spread depending on the credit default swap spread applicable to the Company's debt, subject to a cap and floor that vary with the Company’s debt rating assigned by Moody’s Investors Service and Standard and Poor’s. The spread above LIBOR can range from 0.23% to 1.63%.
Line of Credit Facility, Maximum Borrowing Capacity	$ 6,000	$ 6,000
Interest Income/(Expense)
Net Gains on Available-For-Sale Securities	92	151
Net Gains on Non-Publicly Traded Cost Method Investments	0	46
Letter of Credit
Line of Credit Facility
Line of Credit Facility, Maximum Borrowing Capacity	$ 800	$ 800
Minimum
Line of Credit Facility
Variable Spread Above LIBOR		0.23%
Maximum
Line of Credit Facility
Variable Spread Above LIBOR		1.63%