Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details) (Narratives)

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Income Taxes (Details) (Narratives) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Income Taxes [Line Items]        
Provision (benefit) for income taxes $ 4 $ 3 $ 6 $ 5
Gross unrecognized tax benefits 62   62  
Unrecognized tax benefits, estimated increase (decrease) over the next 12 months (31)   (31)  
Foreign Taxes in Profitable Locations
       
Income Taxes [Line Items]        
Provision (benefit) for income taxes 5 3 8 5
Other Comprehensive Income and Tax Credits
       
Income Taxes [Line Items]        
Provision (benefit) for income taxes (1)   (2)  
Other Comprehensive Income (Loss)
       
Income Taxes [Line Items]        
Provision (benefit) for income taxes   1   2
Canadian Tax Credits and Monetization of U.S. Tax Credits.
       
Income Taxes [Line Items]        
Provision (benefit) for income taxes   $ (1)   $ (2)