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Debt Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity $ 2,300    
Principal repayments on long-term debt in 2017 631    
Principal repayments on long-term debt in 2018 406    
Principal repayments on long-term debt in 2019 506    
Principal repayments on long-term debt in 2020 850    
Principal repayments on long-term debt in 2021 527    
Principal repayments on long-term debt in 2022 and beyond 4,459    
Interest expense, capitalized 4 $ 4 $ 5
Unsecured Five Year Credit Agreement      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 2,000    
Three Hundred Sixty Four Day Revolving Credit Agreement [Member]      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 800    
Letter of Credit [Member] | Unsecured Five Year Credit Agreement      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 75    
U.S. Swingline Loans [Member] | Unsecured Five Year Credit Agreement      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 200    
European Swingline Loans [Member] | Unsecured Five Year Credit Agreement      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 400    
Euro Commercial Paper [Member]      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 750    
Line of Credit Facility, Maximum Month-end Outstanding Amount $ 306 $ 261