Debt Short-term Financing (Details)	9 Months Ended
	Sep. 26, 2015 USD ($)
U.S. Commercial Paper Program [Member]
Short-term Financing [Line Items]
Maximum Period to Maturity Allowed Under Program	397 days
Short-term Debt, Period to Maturity	33 days
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,000,000,000
Line of Credit Facility, Expiration Date	Jul. 31, 2018
Debt, Covenant, Maximum Consolidated Total Leverage Ratio of Debt to EBITDA	3.5
Debt, Covenant, Minimum Consolidated Interest Coverage Ratio	3
Letters of Credit Outstanding, Amount	$ 62,000,000
Line of Credit Facility, Amount Outstanding	$ 0