Segment Information & Geographic Data - Geographic Data for Net Sales (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Segment Reporting Information [Line Items]
Total Net sales	$ 1,132	$ 1,130	$ 3,140	$ 3,293
North America
Segment Reporting Information [Line Items]
Total Net sales	629	591	1,650	1,641
EMEA
Segment Reporting Information [Line Items]
Total Net sales	340	346	1,034	1,082
Asia-Pacific
Segment Reporting Information [Line Items]
Total Net sales	115	133	322	399
Latin America
Segment Reporting Information [Line Items]
Total Net sales	$ 48	$ 60	$ 134	$ 171