Debt (Components of Notes Payable) (Details) (USD $) In Millions, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013
Short-term Debt [Line Items]
Principal amount	$ 858	$ 739	[1]
Euro Commercial Paper [Member]
Short-term Debt [Line Items]
Principal amount	414	437
Effective interest rate	0.36%	0.23%
U.S. Commercial Paper [Member]
Short-term Debt [Line Items]
Principal amount	391	249
Effective interest rate	0.19%	0.22%
Bank Borrowings [Member]
Short-term Debt [Line Items]
Principal amount	$ 53	$ 53

[1] Condensed from audited financial statements.