Reconciliation of Measure of Division Operating Income to Consolidated Income Before Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Segment Reporting Information [Line Items]
Total Divisions operating income	$ 48	$ 41	$ 125	$ 165
Asset impairments	0	(1)	0	(1)
Merger and restructuring expenses, net	(14)	(20)	(31)	(40)
Unallocated expenses	(33)	(21)	(71)	(46)
Interest income	6	6	12	12
Interest expense	(31)	(14)	(60)	(27)
Other income, net	5	2	6	6
Income from continuing operations before income taxes	28	35	83	156
Operating Segments
Segment Reporting Information [Line Items]
Total Divisions operating income	$ 95	$ 83	$ 227	$ 252