Quarterly report pursuant to Section 13 or 15(d)

Debt and Borrowing Arrangements (Details)

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Debt and Borrowing Arrangements (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 28, 2018
Sep. 28, 2018
Sep. 29, 2017
Long-term debt      
Amount of debt retired or extinguished   $ 2,026  
Total principal notes due April 1, 2018 [Domain]      
Long-term debt      
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate 1.15% 1.15%  
Amount of debt retired or extinguished   $ 1,250  
Total principal notes due March 14, 2018 [Domain]      
Long-term debt      
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate 1.65% 1.65%  
Amount of debt retired or extinguished   $ 750  
Total principal notes due January 29, 2018 [Domain]      
Long-term debt      
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate 9.66% 9.66%  
Amount of debt retired or extinguished   $ 26  
Total principal notes due May 15, 2098 [Domain]      
Long-term debt      
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate 7.00% 7.00%  
Amount of debt retired or extinguished   $ 94  
Gain (Loss) on Extinguishment of Debt   27  
Corporate      
Long-term debt      
Gain (Loss) on Extinguishment of Debt $ 27 27 $ (38)
Corporate | Total principal notes due May 15, 2098 [Domain]      
Long-term debt      
Gain (Loss) on Extinguishment of Debt $ 27 $ 27