Derivative Instruments and Fair Value Measurements (Schedule of Offsetting Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013
Offsetting [Abstract]
Net Amounts of Assets Presented in the Balance Sheet	$ 10	$ 10
Financial Instruments, Gross Amount Not Offset In Balance Sheet	(10)	(10)
Cash Collateral Posted, Gross Amount Not Offset In Balance Sheet	0	0
Net Amount, Assets Derivatives	0	0
Net Amounts of Liabilities Presented In Balance sheet	(79)	(102)
Financial Instruments, Gross Amount Not Offset in Balance Sheet	10	10
Cash Collateral Received, Gross Amount Not Offset In Balance Sheet	27	21
Net Amount, Liability Derivatives	$ (42)	$ (71)