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Schedule of Fair Value Assets and Liabilities (Detail) - USD ($)
$ in Millions
Sep. 26, 2020
Dec. 28, 2019
Assets    
Money market funds $ 857  
Liabilities    
Interest rate swaps 7 $ 1
Level 1    
Assets    
Money market funds 857  
Liabilities    
Interest rate swaps 0 0
Level 2    
Assets    
Money market funds 0  
Liabilities    
Interest rate swaps 7 1
Level 3    
Assets    
Money market funds 0  
Liabilities    
Interest rate swaps $ 0 $ 0