Segment information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 713,473	$ 567,034	$ 1,347,398	$ 1,197,676
Operating profit	128,620	38,810	232,054	195,896
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	167,130	88,332	301,205	275,050
Unallocated expenses
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	(38,510)	(49,522)	(69,151)	(79,154)
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	414,785	312,490	790,278	670,492
Americas | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	105,379	47,539	188,981	188,507
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	157,129	131,643	298,382	287,767
EMEA | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	23,301	14,923	46,296	35,342
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	80,603	67,069	144,293	120,198
Asia | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	23,188	13,626	38,104	23,858
OEM
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	60,956	55,832	114,445	119,219
OEM | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	$ 15,262	$ 12,244	$ 27,824	$ 27,343