Segment Information - Segment Information by Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total net sales	$ 977	$ 865
Total operating income	144	40
Expenses reclassified	(321)	(361)
Operating Segments
Segment Reporting Information [Line Items]
Total net sales	977	866
Total operating income	172	122
Operating Segments | AIT
Segment Reporting Information [Line Items]
Total net sales	352	322
Total operating income	92	74
Expenses reclassified		7	$ 14
Operating Segments | EVM
Segment Reporting Information [Line Items]
Total net sales	625	544
Total operating income	80	48
Expenses reclassified		(7)	$ (14)
Corporate, eliminations
Segment Reporting Information [Line Items]
Total net sales	0	(1)
Total operating income	$ (28)	$ (82)