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Nature of Operations and Significant Accounting Policies (Share Repurchases and Dividend Increase) (Details) (USD $)
Share data in Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 27, 2014
Jun. 27, 2014
Jun. 28, 2013
Apr. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Share repurchase program       $ 1,000,000,000
Shares repurchased $ 131,000,000 $ 257,000,000 $ 95,000,000  
Shares repurchased during the period (shares) 4