Severance and Facility Closure Costs (Detail) $ in Millions	3 Months Ended
	Mar. 30, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Balance as of December 29, 2018	$ 18
Charges Incurred	7
Cash Payments	(2)
Adjustments	(13)	[1]
Balance as of March 30, 2019	10
Termination benefits | Merger related accruals
Restructuring Cost and Reserve [Line Items]
Balance as of December 29, 2018	3
Charges Incurred	1
Cash Payments	(2)
Balance as of March 30, 2019	2
Termination benefits | Comprehensive Business Review
Restructuring Cost and Reserve [Line Items]
Charges Incurred	1
Balance as of March 30, 2019	1
Other Costs | Merger related accruals
Restructuring Cost and Reserve [Line Items]
Balance as of December 29, 2018	10
Adjustments	(10)	[1]
Other Costs | Comprehensive Business Review
Restructuring Cost and Reserve [Line Items]
Balance as of December 29, 2018	5
Charges Incurred	5
Adjustments	(3)	[1]
Balance as of March 30, 2019	$ 7

[1] Represents reclassification of operating lease obligations associated with facility closures to Operating lease right-of-use assets on the Consolidated Balance Sheet in accordance with the new lease accounting standard.