Summary of Major Components of Merger and Restructuring Expenses, Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Merger and transaction related expenses
Severance and retention				$ 1
Transaction and integration	$ 7	$ 5	$ 14	12
Total Merger and transaction related expenses	7	5	14	13
Restructuring expenses
Severance	42	40	42	40
Professional fees	5	16	11	19
Facility closure, contract termination, and other expenses, net	11	8	14	11
Total Restructuring expenses	58	64	67	70
Total Merger and restructuring expenses, net	$ 65	$ 69	$ 81	$ 83