Net revenues Other revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Revenue, Major Customer [Line Items]
Net revenues	$ 630,642	$ 613,584
Vascular access
Revenue, Major Customer [Line Items]
Net revenues	150,256	143,897
Anesthesia
Revenue, Major Customer [Line Items]
Net revenues	75,702	80,252
Interventional
Revenue, Major Customer [Line Items]
Net revenues	99,931	103,184
Surgical
Revenue, Major Customer [Line Items]
Net revenues	75,432	86,719
Interventional urology
Revenue, Major Customer [Line Items]
Net revenues	74,194	59,731
OEM
Revenue, Major Customer [Line Items]
Net revenues	63,389	54,238
Other
Revenue, Major Customer [Line Items]
Net revenues	$ 91,738	$ 85,563