Goodwill and other intangible assets, net - Components of intangible assets (Details) - USD ($) $ in Thousands	Mar. 29, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 3,188,322	$ 3,011,084
Accumulated Amortization	(891,144)	(854,799)
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	27,881	27,940
Accumulated Amortization	0	0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	1,161,837	1,021,852
Accumulated Amortization	(378,423)	(367,585)
Intellectual property
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	1,391,133	1,351,990
Accumulated Amortization	(422,454)	(402,340)
Distribution rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	23,352	23,369
Accumulated Amortization	(19,115)	(18,859)
Trade names
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	561,622	563,315
Accumulated Amortization	(54,324)	(50,718)
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	22,497	22,618
Accumulated Amortization	$ (16,828)	$ (15,297)