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Stock Compensation - Performance Shares (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Apr. 04, 2015
Apr. 02, 2016
Feb. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of performance shares that may be earned upon performance, minimum 0.00%    
Percentage of performance shares that may be earned upon performance, maximum 200.00%    
2013 Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance share award settlement as a percentage of target     35.00%
Performance share award settlement     $ 3
2014 Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum fair value of performance shares   $ 31  
2015 Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance shares target vesting period 3 years    
Performance award condition time period 3 years    
Performance shares target grant distribution (in shares)   195,000  
Grant-date fair value of shares that correspond with target grants   $ 76  
Maximum fair value of performance shares   $ 27  
2016 Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum fair value of performance shares   $ 30