Debt (Narrative) (Details) In Millions, unless otherwise specified	6 Months Ended									6 Months Ended								6 Months Ended
	Jun. 28, 2014 USD ($)	Jun. 29, 2013 USD ($)	Dec. 28, 2013 USD ($)	Jun. 28, 2014 Revolving Credit Facility [Member] USD ($)	Jun. 28, 2014 Line Of Credit [Member] USD ($)	Jun. 28, 2014 U.S. Swingline Loans [Member] USD ($)	Jun. 28, 2014 European Swingline Loans [Member] USD ($)	Jun. 28, 2014 Interest Rate Swap [Member] USD ($)	Jun. 28, 2014 3.25% U.S. Dollar Notes due 2018 [Member]	Jun. 28, 2014 2.75% Ten Year U.S. Dollar Notes [Member] USD ($)	Jun. 28, 2014 4% Ten Year U.S. Dollar Notes due 2020 [Member] USD ($)	Jun. 28, 2014 1.75% Seven Year Euro Dollar Notes due 2021 [Member]	May 31, 2014 1.75% Seven Year Euro Dollar Notes due 2021 [Member] USD ($)	May 31, 2014 1.75% Seven Year Euro Dollar Notes due 2021 [Member] EUR (€)	Jun. 28, 2014 4.45% Seven Year U.S. Dollar Notes due 2016 [Member]	Jun. 28, 2014 1.875% Five Year U.S. Dollar Notes due 2016 [Member]	Jun. 28, 2014 4.15% Ten Year U.S. Dollar Notes due 2019 [Member]	Jun. 28, 2014 3.125% Ten Year U.S. Dollar Notes Due 2022 [Member] USD ($)	May 31, 2014 2.05% Three Year Canadian Dollar Notes due 2017 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]
Notional amounts of interest rate swaps	$ 4,245		$ 3,278					$ 2,400
Debt Instrument, Face Amount													678	500					279	300	300
Debt instrument, stated interest rate									3.25%		4.00%	1.75%			4.45%	1.875%	4.15%	3.125%
Effective interest rate									1.83%		2.80%	1.31%			3.43%	0.97%	2.71%	2.28%
Repayment of long-term debt	957	760								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