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Summary of Major Components of Merger and Restructuring Expenses, Net (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 25, 2021
Sep. 26, 2020
Sep. 25, 2021
Sep. 26, 2020
Merger and transaction related expenses        
Transaction and integration $ (1)     $ 5
Total Merger and transaction related expenses (1)     5
Restructuring expenses        
Severance (1) $ 2 $ (2) 39
Professional fees   10 1 21
Facility closure, contract termination, and other expenses, net 5 12 14 24
Total Restructuring expenses, net 4 24 13 84
Other operating expenses        
Professional fees 10   24  
Total Other operating expenses 10   24  
Total Merger, restructuring and other operating expenses, net $ 13 $ 24 $ 37 $ 89