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Debt Debt - Borrowing Arragements Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Line of Credit Facility [Line Items]        
Line of credit facility, maximum borrowing capacity   $ 4,000,000,000.0    
Amount drawn on revolving credit facility   0 $ 0  
Proceeds on revolving credit facility   0 0 $ 0
Revolving credit facility sub-limit for borrowings in alternative currencies   1,000,000,000.0    
Revolving credit facility letter of credit sub-facility maximum borrowing capacity   300,000,000    
Maximum possible increase in the amount of revolving commitments and/or term loans   1,000,000,000.0    
Minimum shareholder's equity required to maintain excluding accumulated other comprehensive income/(losses)   35,000,000,000    
Repayments of long-term debt   4,795,000,000 2,713,000,000 $ 2,641,000,000
Commercial paper outstanding   0 0  
Commercial paper        
Line of Credit Facility [Line Items]        
Commerical paper, maximum amount outstanding during period   200,000,000    
Euro equivalent swing-line facility        
Line of Credit Facility [Line Items]        
Line of credit facility, maximum borrowing capacity   400,000,000    
Senior unsecured term loan facility floating rate (LIBOR plus 1.250 percent), due July 6, 2022        
Line of Credit Facility [Line Items]        
Repayments of long-term debt $ 600,000,000      
Long-term debt, principal amount   $ 0 $ 0  
LIBOR, EURIBOR and CDOR rates | Minimum        
Line of Credit Facility [Line Items]        
Basis points spread on variable rate for revolving credit facility   8750.00%    
LIBOR, EURIBOR and CDOR rates | Maximum        
Line of Credit Facility [Line Items]        
Basis points spread on variable rate for revolving credit facility   17500.00%    
base and Canadian prime rates | Minimum        
Line of Credit Facility [Line Items]        
Basis points spread on variable rate for revolving credit facility   0.00%    
base and Canadian prime rates | Maximum        
Line of Credit Facility [Line Items]        
Basis points spread on variable rate for revolving credit facility   7500.00%