Summary of Major Components of Merger and Restructuring Expenses, Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Merger and transaction related expenses
Transaction and integration	$ 0	$ 7	$ 1	$ 14
Total Merger and transaction related expenses		7	1	14
Restructuring expenses
Severance	(7)	42	(6)	42
Professional fees		5	1	11
Facility closure, contract termination, and other expenses, net		11	9	14
Total Restructuring expenses, net	(7)	58	4	67
Other operating expenses
Professional fees	14		16
Total Other operating expenses	14		16
Total Merger, restructuring and other operating expenses, net	$ 7	$ 65	$ 21	$ 81