Goodwill and other intangible assets, net - Components of intangible assets (Details) - USD ($) $ in Thousands	Sep. 29, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,987,952	$ 3,033,706
Accumulated Amortization	(812,279)	(708,654)
In-process research and development
Finite-Lived Intangible Assets [Line Items]
In-process research and development	27,432	28,457
Accumulated Amortization	0	0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	1,011,462	1,030,194
Accumulated Amortization	(354,140)	(322,972)
Intellectual property
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	1,342,956	1,363,516
Accumulated Amortization	(379,332)	(322,539)
Distribution rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	23,274	23,465
Accumulated Amortization	(18,492)	(17,860)
Trade names
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	560,613	565,070
Accumulated Amortization	(46,878)	(36,379)
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	22,215	23,004
Accumulated Amortization	$ (13,437)	$ (8,904)