Debt (Components of Notes Payable) (Details) (USD $) In Millions, unless otherwise specified	Sep. 28, 2013	Dec. 29, 2012
Short-term Debt [Line Items]
Principal amount	$ 756	$ 1,065	[1]
Euro Commercial Paper [Member]
Short-term Debt [Line Items]
Principal amount	142	159
Effective interest rate	0.20%	0.18%
U.S. Commercial Paper [Member]
Short-term Debt [Line Items]
Principal amount	573	853
Effective interest rate	0.21%	0.26%
Bank Borrowings [Member]
Short-term Debt [Line Items]
Principal amount	$ 41	$ 53

[1] Condensed from audited financial statements.