Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details) (Narratives)

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Income Taxes (Details) (Narratives) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Dec. 26, 2015
Sep. 26, 2015
Sep. 27, 2014
Sep. 26, 2015
Sep. 27, 2014
Income Taxes          
Provision (benefit) for income taxes   $ 0 $ 2 $ 4 $ 8
Gross unrecognized tax benefits   $ 27   $ 27  
Foreign Tax Authority [Member] | Estimate          
Income Tax Examination          
Potential income tax examination liability $ 17        
Foreign taxes in profitable locations          
Income Taxes          
Provision (benefit) for income taxes         9
Other Comprehensive Income and Tax Credits          
Income Taxes          
Provision (benefit) for income taxes         $ (1)