Total Net Sales by Product Group Category (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 873.5	$ 819.7
Vascular
Segment Reporting Information [Line Items]
Net sales	239.5	231.9
Urology
Segment Reporting Information [Line Items]
Net sales	216.7	205.6
Oncology
Segment Reporting Information [Line Items]
Net sales	241.9	224.6
Surgical Specialties
Segment Reporting Information [Line Items]
Net sales	151.4	135.9
Other Product Group
Segment Reporting Information [Line Items]
Net sales	$ 24.0	$ 21.7