Reconciliation of Measure of Division Operating Income to Consolidated Income Before Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Segment Reporting Information [Line Items]
Total Divisions operating income	$ 77	$ 124
Merger and restructuring expenses, net	(17)	(20)
Unallocated expenses	(38)	(25)
Interest income	6	6
Interest expense	(29)	(13)
Other income, net	1	4
Income from continuing operations before income taxes	55	121
Operating Segments
Segment Reporting Information [Line Items]
Total Divisions operating income	$ 132	$ 169