Segment Information & Geographic Data (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020 USD ($)	Sep. 28, 2019 USD ($)	Sep. 26, 2020 USD ($) segment	Sep. 28, 2019 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			2
Segment Reporting Information [Line Items]
Total Net sales	$ 1,132	$ 1,130	$ 3,140	$ 3,293
Total Operating income	150	185	420	504
Operating Segments
Segment Reporting Information [Line Items]
Total Net sales	1,134	1,130	3,142	3,293
Total Operating income	199	226	517	616
Corporate, eliminations
Segment Reporting Information [Line Items]
Total Net sales	(2)	0	(2)	0
Total Operating income	(49)	(41)	(97)	(112)
AIT
Segment Reporting Information [Line Items]
Total Net sales	346	373	992	1,100
AIT | Operating Segments
Segment Reporting Information [Line Items]
Total Net sales	346	373	992	1,100
Total Operating income	79	93	216	269
EVM | Operating Segments
Segment Reporting Information [Line Items]
Total Net sales	788	757	2,150	2,193
Total Operating income	$ 120	$ 133	$ 301	$ 347