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Commitments and Contingencies (Narrative) (Details)
$ in Millions
1 Months Ended 12 Months Ended
Oct. 09, 2015
USD ($)
Mar. 31, 2013
case
Jan. 02, 2016
USD ($)
case
Jan. 03, 2015
USD ($)
case
Dec. 28, 2013
USD ($)
Loss Contingencies [Line Items]          
Rent expense | $     $ 45 $ 51 $ 36
December 2012 Securities Litigation [Member]          
Loss Contingencies [Line Items]          
Number of cases consolidated | case   2      
Riata Litigation [Member]          
Loss Contingencies [Line Items]          
Estimated Litigation Liability | $     $ 15    
Pending cases and claims | case       950  
Number of claimants in lawsuit | case     886    
Settlement payment | $ $ 13