Segment Information & Geographic Data - Financial Information by Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Total Net sales	$ 1,066	$ 977
Total Operating income	159	144
AIT
Segment Reporting Information [Line Items]
Total Net sales	357	352
Operating Segments
Segment Reporting Information [Line Items]
Total Operating income	193	172
Operating Segments | AIT
Segment Reporting Information [Line Items]
Total Net sales	357	352
Total Operating income	92	92
Operating Segments | EVM
Segment Reporting Information [Line Items]
Total Net sales	709	625
Total Operating income	101	80
Corporate, eliminations
Segment Reporting Information [Line Items]
Total Operating income	$ (34)	$ (28)