Segment Information & Geographic Data - Financial Information by Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total Net sales	$ 1,097	$ 1,012	$ 2,163	$ 1,989
Total Operating income	160	125	319	269
AIT
Segment Reporting Information [Line Items]
Total Net sales	370	351	727	703
Operating Segments
Segment Reporting Information [Line Items]
Total Operating income	197	150	390	322
Operating Segments | AIT
Segment Reporting Information [Line Items]
Total Net sales	370	351	727	703
Total Operating income	84	77	176	169
Operating Segments | EVM
Segment Reporting Information [Line Items]
Total Net sales	727	661	1,436	1,286
Total Operating income	113	73	214	153
Corporate, eliminations
Segment Reporting Information [Line Items]
Total Operating income	$ (37)	$ (25)	$ (71)	$ (53)