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Debt Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Jan. 31, 2019
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity $ 2,800    
Principal repayments on long-term debt in 2019 507    
Principal repayments on long-term debt in 2020 851    
Principal repayments on long-term debt in 2021 973    
Principal repayments on long-term debt in 2022 1,045    
Principal repayments on long-term debt in 2023 811    
Principal repayments on long-term debt in 2024 and beyond 4,598    
Five Year Credit Agreement      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 1,500    
Three Hundred Sixty Four Day Revolving Credit Agreement [Member]      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 1,000
Expired Three Hundred Sixty Four Day Revolving Credit Facility      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 1,000    
Letter of Credit [Member] | Five Year Credit Agreement      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 75    
Euro Commercial Paper [Member]      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity $ 750    
Debt Instrument, Term 364 days    
Line of Credit Facility, Maximum Month-end Outstanding Amount $ 0 $ 96  
European Swingline Loans [Member] | Five Year Credit Agreement      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity $ 300