Nature of Operations and Significant Accounting Policies (Other Items - Share Repurchases) (Details) (USD $) Share data in Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Apr. 30, 2013	Dec. 27, 2013	Dec. 28, 2012		Dec. 30, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Share repurchase program	$ 1,000,000,000
Shares acquired, repurchase amount		$ 353,000,000	$ 734,000,000	[1]	$ 1,564,000,000	[1]
Stock Repurchased and Retired During Period, Shares		14	34		67

[1] See the revision of prior period financial statements in Note 1. Nature of Operations and Significant Accounting Policies.