Goodwill and other intangible assets, net - Components of intangible assets (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 3,206,333	$ 3,011,084
Accumulated Amortization	(977,403)	(854,799)
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	28,735	27,940
Accumulated Amortization	0	0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	1,169,307	1,021,852
Accumulated Amortization	(408,372)	(367,585)
Intellectual property
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	1,394,676	1,351,990
Accumulated Amortization	(466,330)	(402,340)
Distribution rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	23,604	23,369
Accumulated Amortization	(19,829)	(18,859)
Trade names
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	566,532	563,315
Accumulated Amortization	(61,911)	(50,718)
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	23,479	22,618
Accumulated Amortization	$ (20,961)	$ (15,297)