Goodwill and other intangible assets, net Components of intangible assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,554,179	$ 1,557,688
Accumulated amortization	(345,927)	(302,091)
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	631,983	628,020
Accumulated amortization	(188,261)	(168,223)
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	68,766	68,786
Accumulated amortization	0	0
Intellectual Property
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	433,227	435,869
Accumulated amortization	(140,606)	(118,086)
Distribution Rights
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	16,406	16,797
Accumulated amortization	(14,466)	(14,592)
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	403,460	407,879
Accumulated amortization	(2,425)	(1,148)
Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	337	337
Accumulated amortization	$ (169)	$ (42)