Severance and Facility Closure Costs (Detail) - USD ($) $ in Millions			12 Months Ended
		May 08, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Restructuring Cost and Reserve [Line Items]
Beginning Balance			$ 18	$ 32
Charges Incurred			90	20
Cash Payments			(73)	(34)
Adjustments	[1]		(13)
Ending Balance			22	18	$ 32
Comprehensive Business Review
Restructuring Cost and Reserve [Line Items]
Charges Incurred			8	5	50
Business Acceleration Program
Restructuring Cost and Reserve [Line Items]
Charges Incurred		$ 107	82
Termination benefits | Merger related accruals
Restructuring Cost and Reserve [Line Items]
Beginning Balance			3	1
Charges Incurred			2	9
Cash Payments			(4)	(7)
Ending Balance			1	3	1
Termination benefits | Comprehensive Business Review
Restructuring Cost and Reserve [Line Items]
Beginning Balance				4
Cash Payments				(4)
Ending Balance					4
Termination benefits | Business Acceleration Program
Restructuring Cost and Reserve [Line Items]
Charges Incurred			40
Cash Payments			(27)
Ending Balance			13
Other Costs | Merger related accruals
Restructuring Cost and Reserve [Line Items]
Beginning Balance			10	18
Charges Incurred				5
Cash Payments				(13)
Adjustments	[1]		(10)
Ending Balance				10	18
Other Costs | Comprehensive Business Review
Restructuring Cost and Reserve [Line Items]
Beginning Balance			5	9
Charges Incurred			6	6
Cash Payments			(5)	(10)
Adjustments	[1]		(3)
Ending Balance			3	$ 5	$ 9
Other Costs | Business Acceleration Program
Restructuring Cost and Reserve [Line Items]
Charges Incurred		$ 9	42
Cash Payments			(37)
Ending Balance			$ 5

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