Total Net Sales by Product Group Category (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 865.7	$ 830.0	$ 2,545.2	$ 2,456.4
Vascular
Segment Reporting Information [Line Items]
Net sales	250.5	231.5	731.0	683.7
Urology
Segment Reporting Information [Line Items]
Net sales	212.3	209.6	627.1	618.1
Oncology
Segment Reporting Information [Line Items]
Net sales	239.3	229.7	699.1	673.4
Surgical Specialties
Segment Reporting Information [Line Items]
Net sales	139.8	135.6	419.5	410.1
Other Product Group
Segment Reporting Information [Line Items]
Net sales	$ 23.8	$ 23.6	$ 68.5	$ 71.1