Goodwill and other intangible assets, net Components of intangible assets (Details) - USD ($) $ in Thousands	Jun. 28, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,567,914	$ 1,573,043
Accumulated amortization	(382,397)	(356,323)
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	625,603	624,574
Accumulated amortization	(203,458)	(192,876)
Intellectual Property
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	495,076	467,068
Accumulated amortization	(159,643)	(146,131)
Distribution Rights
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	15,660	16,101
Accumulated amortization	(13,969)	(14,243)
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	388,322	396,269
Accumulated amortization	(4,990)	(2,764)
Non-compete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	2,253	337
Accumulated amortization	(337)	(309)
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	0	0
Indefinite-lived intangible assets	$ 41,000	$ 68,694