Reconciliation of Measure of Division Operating Income to Consolidated Income Before Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Segment Reporting Information [Line Items]
Total Divisions operating income	$ 55	$ 80
Asset impairments	(12)	(12)
Merger, restructuring and other operating expenses, net	(14)	(16)
Unallocated expenses	(35)	(22)
Interest income		3
Interest expense	(7)	(18)
Other income, net	11	1
Income before income taxes	59	66
Operating Segments
Segment Reporting Information [Line Items]
Total Divisions operating income	$ 116	$ 130