Nature of Operations and Significant Accounting Policies (Nature of Operations) (Details) Phantom (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 27, 2013	Dec. 28, 2012	Dec. 30, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of weeks in fiscal reporting calendar	P52W	P52W	P52W
Number of weeks in fiscal quarter	P13W
Cost Method Investment, Maximum Percentage for Treatment	20.00%
Cash equivalents, maximum maturity period	3 months
Short-term investments, minimum maturity period	3 months
Short-term investments, maximum maturity period	1 year
Allowance for Doubtful Accounts Receivable, Current	$ 33	$ 36
Goodwill	$ 64