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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Oct. 03, 2015
Sep. 27, 2014
Jan. 03, 2015
Income Tax Contingency [Line Items]          
Effective income tax rate 24.00% 28.00% 26.00% 29.00%  
Unrecognized tax benefits $ 74   $ 74   $ 78
Projected additions to unrecognized tax benefits 7   7    
Unrecognized tax benefits that would affect the effective income tax rate 51   51    
Other current liabilities          
Income Tax Contingency [Line Items]          
Unrecognized tax benefits $ 17   $ 17