Debt (Narrative) (Details) In Millions, unless otherwise specified	9 Months Ended									9 Months Ended							9 Months Ended
	Sep. 27, 2014 USD ($)	Sep. 28, 2013 USD ($)	Dec. 28, 2013 USD ($)	Sep. 27, 2014 Revolving Credit Facility [Member] USD ($)	Sep. 27, 2014 Line Of Credit [Member] USD ($)	Sep. 27, 2014 U.S. Swingline Loans [Member] USD ($)	Sep. 27, 2014 European Swingline Loans [Member] USD ($)	Sep. 27, 2014 Interest Rate Swap [Member] USD ($)	Sep. 27, 2014 3.25% U.S. Dollar Notes due 2018 [Member]	Sep. 27, 2014 2.75% Ten Year U.S. Dollar Notes [Member] USD ($)	Sep. 27, 2014 4% Ten Year U.S. Dollar Notes due 2020 [Member] USD ($)	Sep. 27, 2014 1.75% Seven Year Euro Dollar Notes due 2021 [Member]	May 31, 2014 1.75% Seven Year Euro Dollar Notes due 2021 [Member] EUR (€)	Sep. 27, 2014 4.45% Seven Year U.S. Dollar Notes due 2016 [Member]	Sep. 27, 2014 1.875% Five Year U.S. Dollar Notes due 2016 [Member] USD ($)	Sep. 27, 2014 4.15% Ten Year U.S. Dollar Notes due 2019 [Member]	Sep. 27, 2014 3.125% Ten Year U.S. Dollar Notes Due 2022 [Member] USD ($)	May 31, 2014 2.05% Three Year Canadian Dollar Notes due 2017 CAD	May 31, 2014 2.10% Two Year Canadian Dollar Notes Due 2014 CAD
Debt Instrument [Line Items]
Unrealized gain gain on termination of interest rate fair value hedge															$ 2
Notional amounts of interest rate swaps	4,251		3,278					2,400							500
Debt Instrument, Face Amount													500					300	300
Debt instrument, stated interest rate									3.25%		4.00%	1.75%		4.45%	1.875%	4.15%	3.125%
Effective interest rate									1.84%		2.09%	1.32%		3.42%	1.58%	2.71%	1.32%
Repayment of long-term debt	959	761								189	150						342
Line of credit facility, maximum borrowing capacity				2,000	75	200	400
Interest Expense Debt	1
Accelerated Gains On Redeemed Debt	8
Accelerated Expense On Redeemed Debt	$ 5