Borrowings - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Apr. 01, 2017	Apr. 01, 2017	Mar. 31, 2017
Line of Credit Facility
Line of Credit Facility, Maximum Borrowing Capacity	$ 7,000	$ 7,000
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%.
Letters of Credit Outstanding, Amount	187	$ 187
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%
Existing Line of Credit 3
Line of Credit Facility
Line of Credit Facility, Initial Borrowing Capacity			$ 1,500
Line of Credit Facility Increase	1,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,500	$ 2,500