Borrowings Bank facilities to support commercial paper borrowings (Details) (USD $) In Millions, unless otherwise specified	Sep. 27, 2014
Line of Credit Facility [Line Items]
Line of Credit Facility, Committed Capacity	$ 6,000
Line of Credit Facility, Capacity Used	0
Line of Credit Facility, Unused Capacity	6,000
Existing Line of Credit 3
Line of Credit Facility [Line Items]
Line of Credit Facility, Committed Capacity	1,500
Line of Credit Facility, Capacity Used	0
Line of Credit Facility, Unused Capacity	1,500
Existing Line Of Credit 1
Line of Credit Facility [Line Items]
Line of Credit Facility, Committed Capacity	2,250
Line of Credit Facility, Capacity Used	0
Line of Credit Facility, Unused Capacity	2,250
Existing Line of Credit 2
Line of Credit Facility [Line Items]
Line of Credit Facility, Committed Capacity	2,250
Line of Credit Facility, Capacity Used	0
Line of Credit Facility, Unused Capacity	$ 2,250