Goodwill and other intangible assets, net - Components of intangible assets (Details) - USD ($) $ in Thousands	Jun. 28, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 3,194,008	$ 3,011,084
Accumulated Amortization	(933,145)	(854,799)
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	28,109	27,940
Accumulated Amortization	0	0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	1,164,518	1,021,852
Accumulated Amortization	(393,057)	(367,585)
Intellectual property
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	1,392,124	1,351,990
Accumulated Amortization	(443,927)	(402,340)
Distribution rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	23,419	23,369
Accumulated Amortization	(19,455)	(18,859)
Trade names
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	563,070	563,315
Accumulated Amortization	(58,035)	(50,718)
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	22,768	22,618
Accumulated Amortization	$ (18,671)	$ (15,297)