Reconciliation of Measure of Division Operating Income to Consolidated Income Before Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Total Divisions operating income	$ 24	$ 77
Asset impairments	(29)
Merger and restructuring expenses, net	(14)	(17)
Unallocated expenses	(31)	(38)
Interest income	6	6
Interest expense	(23)	(29)
Other income, net	2	1
Income from continuing operations before income taxes	9	55
Operating Segments
Segment Reporting Information [Line Items]
Total Divisions operating income	$ 98	$ 132