Financial Instruments (Details) (Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments not Recorded at Fair Value) (USD $) In Millions, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013
Financial Instrument [Line Items]
Short-term debt (excluding capital leases), at carrying amount	$ 96	$ 55
Short-term debt (excluding capital leases), at estimated fair value	98	55
Long-term debt (excluding capital leases), at carrying amount	2,100	1,986
Long-term debt (excluding capital leases), at estimated fair value	$ 2,232	$ 2,132