Segment information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 630,642	$ 613,584
Operating profit	157,086	75,243
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	186,719	115,922
Unallocated expenses
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	(29,633)	(40,679)
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	358,002	344,024
Americas | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	140,969	65,599
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	156,124	154,545
EMEA | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	20,419	27,023
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	53,129	60,777
Asia | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	10,232	9,979
OEM
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	63,387	54,238
OEM | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	$ 15,099	$ 13,321